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ZL30110 Telecom Rate Conversion DPLL
Data Sheet Features
* * Synchronizes to 8 kHz, 2.048 MHz, 8.192 MHz or 16.384 MHz Provides a range of output clocks: * * * 65.536 MHz TDM clock locked to the input reference General purpose 25 MHz fan-out to 6 outputs locked to the external crystal or oscillator General purpose 125 MHz and 66 MHz or 100 MHz locked to the external crystal or oscillator
Ordering Information ZL30110LDE ZL30110LDE1 32 Pin QFN 32 Pin QFN* Tubes Bake & Dry Pack Tubes Bake & Dry Pack
November 2006
*Pb Free Matte Tin -40C to +85C
Applications
* * * Clock rate conversion PLL for Telecommunication Equipment Small/Medium Enterprise Router / Gateway Broadband access (xPON/xDSL) CPE gateway
* * * * * * *
Provides DPLL lock and reference fail indication Automatic free run mode on reference fail DPLL bandwidth of 922 Hz for all rates of input reference and 58 Hz for an 8 kHz input reference Less than 5 psecrms on 25 MHz outputs, and less than 0.6 nspp intrinsic jitter on the all other outputs Minimal input to output and output to output skew 25 MHz external master clock source: clock oscillator or crystal Simple hardware control interface
Description
The ZL30110 clock rate conversion digital phaselocked loop (DPLL) provides accurate and reliable frequency conversion. The ZL30110 generates a range of clocks that are either locked to the input reference or locked to the external crystal or oscillator. In the locked mode, the reference input is continuously monitored for a failure condition. In the event of a failure, the DPLL continues to provide a stable free running clock ensuring system reliability.
REF_FAIL
LOCK
REF Reference Monitor RST State Machine
DPLL
Frequency Synthesizer
C65o
Select MUX OUT_SEL
OSCi OSCo
Master Clock
APLL APLL
C100/66o C125o 6 X C25o
Figure 1 - Functional Block Diagram
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ZL30110
1.0
1.1
Data Sheet
Physical Description
Pin Connections
C25co C25do C25eo AVDD C25fo C65o AVDD AVCORE 24 C25bo C25ao GND REF IC VDD GND IC 32 2 4 6 8 30 28 12 26 22 20 18 16 C125o C100/66o 14 VDD OUT_SEL VDD OSCi
ZL30110
GND (33- E-pad)
10
OSCo RST
VCORE LOCK REF_FAIL GND GNDVCORE VCORE GND
Figure 2 - Pin Connections (32 pin 5 mm X 5 mm QFN with E-pad)
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ZL30110 Table of Contents
Data Sheet
1.0 Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1 Pin Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.0 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.1 Reference Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2 Digital Phase Lock Loop (DPLL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3 Frequency Synthesizers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.4 State Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.5 APLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.6 Master Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.0 DPLL Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.1 Freerun Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.2 Normal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4.0 Measures of Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.1 Jitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.2 Jitter Generation (Intrinsic Jitter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.3 Jitter Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.4 Lock Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.0 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.1 Power Supply Decoupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.2 Master Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.2.1 Clock Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.2.2 Crystal Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5.3 Power Up Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.4 Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.0 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6.1 AC and DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6.2 Performance Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
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ZL30110 List of Figures
Data Sheet
Figure 1 - Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 2 - Pin Connections (32 pin 5 mm X 5 mm QFN with E-pad) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Figure 3 - Reference Monitor Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 4 - DPLL Mode Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 5 - Clock Oscillator Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 6 - Power-Up Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 7 - Timing Parameter Measurement Voltage Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 8 - Input to Output Timing for Synchronous Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 9 - Asynchronous Clocks Input to Output Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
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ZL30110 List of Tables
Data Sheet
Table 1 - Clock Oscillator Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 2 - Crystal Oscillator Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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ZL30110
1.2 Pin Description
Name I/O Type Description
Data Sheet
Pin #
Input Reference 28 REF I Reference (LVCMOS, Schmitt Trigger). This is the input reference source used for synchronization. One of four possible frequencies may be used: 8 kHz, 2.048 MHz, 8.192 MHz or 16.384 MHz. This pin is internally pulled down to GND. Oscillator Master Clock (Input). For crystal operation, a 25 MHz crystal is connected from this pin to OSCo. For clock oscillator operation, this pin must be connected to a clock source. Oscillator Master Clock (LVCMOS). For crystal operation, a 25 MHz crystal is connected from this pin to OSCi. This output is not suitable for driving other devices (see C25o output pin for support of such function). For clock oscillator operation, this pin must be left unconnected. Reset (LVCMOS, Schmitt Trigger). A logic low at this input resets the device. On power up, the RST pin must be held low for a minimum of 300 ns after the power supply pins have reached the minimum supply voltage. When the RST pin goes high, the device will transition into a Reset state for 3 ms. In the Reset state all outputs will be forced into high impedance. Output Select (LVCMOS, Schmitt Trigger). This input pin selects the output clock frequency of the C100/66o, a logic low selects the 100 MHz output, while logic high selects the 66 MHz output clock. Reference Failure Indicator (LVCMOS). A logic high at this pin indicates that the REF reference frequency is exhibiting abrupt phase or frequency change. Lock Indicator (LVCMOS). This output goes to a logic high when the PLL is frequency locked to a valid input reference. Clock 65.536 MHz (LVCMOS). This output is used in general TDM applications. The falling edge of this clock is aligned with rising edge of the input reference (REF). Clock 25 MHz (LVCMOS). This is a buffered external oscillator clock, the phase and frequency accuracy of this output tracks that of the external crystal or oscillator. Clock 25 MHz (LVCMOS). This is a buffered external oscillator clock, the phase and frequency accuracy of this output tracks that of the external crystal or oscillator. Clock 25 MHz (LVCMOS). This is a buffered external oscillator clock, the phase and frequency accuracy of this output tracks that of the external crystal or oscillator. Clock 25 MHz (LVCMOS). This is a buffered external oscillator clock, the phase and frequency accuracy of this output tracks that of the external crystal or oscillator.
Master Clock 11 OSCi I
10
OSCo
O
Control and Status 9 RST I
13
OUT_SEL
I
3 2
REF_FAIL LOCK
O O
Output Clocks 19 C65o O
26
C25ao
O
25
C25bo
O
24
C25co
O
23
C25do
O
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ZL30110
Pin # 22 Name C25eo I/O Type O Description
Data Sheet
Clock 25 MHz (LVCMOS). This is a buffered external oscillator clock, the phase and frequency accuracy of this output tracks that of the external crystal or oscillator. Clock 25 MHz (LVCMOS). This is a buffered external oscillator clock, the phase and frequency accuracy of this output tracks that of the external crystal or oscillator. Clock 100 MHz or 66 MHz (LVCMOS). This is 100 MHz or 66 MHz rate converted clocks off the 25 MHz fixed frequency external oscillator, the phase and frequency accuracy of this output tracks that of the external crystal or oscillator device. Clock 125 MHz (LVCMOS). This is 125 MHz rate converted clock off the 25 MHz fixed frequency external oscillator, the phase and frequency accuracy of this output tracks that of the external crystal or oscillator device.
20
C25fo
O
15
C100/66o
O
16
C125o
O
Miscellaneous 29 32 12 14 30 1 6 7 17 18 21 4 5 8 27 31 33 E-pad IC IC VDD VDD VDD VCORE VCORE VCORE AVCORE AVDD AVDD GND GND GND GND GND GND
Internal Connection. Connect to VDD. Internal Connection. Connect to VDD.
Power and Ground Positive Supply Voltage. +3.3 VDC nominal. Positive Supply Voltage. +3.3 VDC nominal. Positive Supply Voltage. +3.3 VDC nominal. Positive Supply Voltage. +1.8 VDC nominal. Positive Supply Voltage. +1.8 VDC nominal. Positive Supply Voltage. +1.8 VDC nominal. Positive Analog Supply Voltage. +1.8 VDC nominal. Positive Analog Supply Voltage. +3.3 VDC nominal. Positive Analog Supply Voltage. +3.3 VDC nominal. Ground. 0 V. Ground. 0 V. Ground. 0 V. Ground. 0 V. Ground. 0 V.
Internal Connection. Package E-pad, this pin is internally connected to device GND, it should be connected to GND.
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ZL30110
2.0
2.1
Data Sheet
Functional Description
Reference Monitor
The input reference is monitored by two reference monitor blocks. The block diagram of reference monitoring is shown in Figure 3. The reference frequency is detected and the clock is continuously monitored for two independent criteria that indicate abnormal behavior of the reference signal, for example; loss of clock or excessive level of frequency error. To ensure proper operation of the reference monitor circuit, the minimum input pulse width restriction of 15 nsec must be observed. * Reference Frequency Detector (RFD): This detector determines whether the frequency of the reference clock is 8 kHz, 2.048 MHz, 8.192 MHz or 16.384 MHz and provides this information to the various monitor circuits and the phase detector circuit of the DPLL. Coarse Frequency Monitor (CFM): This circuit monitors the reference frequency over intervals of approximately 30 s to quickly detect large frequency changes. Single Cycle Monitor (SCM): This detector checks the period of a single clock cycle to detect large phase hits or the complete loss of the clock.
* *
Reference Frequency Detector
REF Coarse Frequency Monitor
REF_FAIL
OR
Single Cycle Monitor
Mode select state machine
DPLL in FreeRun Mode
Figure 3 - Reference Monitor Circuit Exceeding the thresholds of any of the monitors forces the corresponding REF_FAIL pin to go high. The single cycle and coarse frequency failure flags force the DPLL into FreeRun mode.
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ZL30110
2.2 Digital Phase Lock Loop (DPLL)
Data Sheet
The DPLL of the ZL30110 consists of a phase detector, a loop filter and a digitally controlled oscillator. Phase Detector - the phase detector compares the input reference signal to the feedback signal and provides an error signal corresponding to the phase difference between the two. Loop Filter - the loop filter is similar to a first order low pass filter with a bandwidth of 922 Hz. For stability reasons, the loop filter bandwidth for an 8 kHz reference is limited to a maximum of 58 Hz. Digitally Controlled Oscillator (DCO) - the DCO receives the filtered signal from the Loop Filter, and based on its value, generates a corresponding digital output signal. The synchronization method of the DCO is dependent on the state of the ZL30110. In Normal Mode, the DCO provides an output signal which is frequency and phase locked to the selected input reference signal. In Freerun Mode, the DCO is free running with an accuracy equal to the accuracy of the OSCi 25 MHz source. Lock Indicator - the lock detector monitors if the output value of the phase detector is within the phase-lockwindow for a certain time. The selected phase-lock-window guarantees the stable operation of the LOCK pin with maximum network jitter and wander on the reference input. If the DPLL goes into FreeRun mode, the LOCK pin will initially stay high for 0.1 s. If at that point the DPLL is still in FreeRun mode, the LOCK pin will go low. In Freerun mode the LOCK pin will go low immediately.
2.3
Frequency Synthesizers
The output of the DCO is used by the frequency synthesizer to generate the output clock which is synchronized to the inputs (REF). The frequency synthesizer uses digital techniques to generate output clock and advanced noise shaping techniques to minimize the output jitter. The clock and frame pulse outputs have limited driving capability and should be buffered when driving high capacitance loads.
2.4
State Machine
As shown in Figure 1, the state machine controls the DPLL.
2.5
APLL
The ZL30110 employ two Analog PLLs as a clock multiplying and rate conversion engine. One APLL is used to multiply the master clock (OSCi) to 125 MHz, a second APLL is used to convert the master clock (OSCi) to 100 MHz or 66 MHz clock.
2.6
Master Clock
The ZL30110 can use either a clock or crystal as the master timing source. For recommended master timing circuits, see the Applications - Master Clock section.
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ZL30110
3.0 DPLL Modes of Operation
Data Sheet
The ZL30110 has two possible modes of operation; Normal, and Freerun. The ZL30110 starts up in Freerun mode, it automatically transitions to Normal mode if a valid reference is available and transitions to Freerun mode if the reference fails.
3.1
Freerun Mode
Freerun mode is typically used when an independent clock source is required or immediately following system power-up before synchronization is achieved. In Freerun mode, the ZL30110 provides timing and synchronization signals which are based on the master clock frequency (supplied to OSCi pin) only and are not synchronized to the reference input signals. The accuracy of the output clock is equal to the accuracy of the master clock (OSCi). So if a 32 ppm output clock is required, the master clock must also be 32 ppm. See Applications - Section 5.2, "Master Clock". Freerun Mode is also used for short durations while system synchronization is temporarily disrupted. The accuracy of the output clock during these input reference disruptions is better than the accuracy of the master clock (OSCi), but it is off compared to the reference before disruptions.
3.2
Normal Mode
Normal mode is typically used when a system clock source, synchronized to the network is required. In Normal mode, the ZL30110 provides timing synchronization signals, which are synchronized to the input (REF). The input reference signal may have a nominal frequency of 8 kHz, 2.048 MHz, 8.192 MHz or 16.384 MHz. The frequency of the reference inputs are automatically detected by the reference monitors. When the ZL30110 comes out of RESET it will initially go into Freerun mode and generate a clock with the accuracy of its freerunning local oscillator (see Figure 4). If the ZL30110 determines that its selected reference is disrupted (see Figure 3), it will remain in Freerun until the selected reference is no longer disrupted. If the ZL30110 determines that the reference is not disrupted (see Figure 3) then the state machine will cause the DPLL to recover from Freerun and transition to Normal mode. When the ZL30110 is operating in Normal mode, if it determines that the input reference is disrupted (Figure 3) then its state machine will cause it to automatically go to Freerun mode. When the ZL30110 determines that its selected reference is not disrupted then the state machine will cause the DPLL to recover from Freerun and transition to Normal mode.
REF_FAIL=0 RST Freerun REF_FAIL=1 Normal
Figure 4 - DPLL Mode Switching
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ZL30110
4.0 Measures of Performance
Data Sheet
The following are some PLL performance indicators and their corresponding definitions.
4.1
Jitter
Timing jitter is defined as the high frequency variation of the clock edges from their ideal positions in time. Wander is defined as the low-frequency variation of the clock edges from their ideal positions in time. High and low frequency variation imply phase oscillation frequencies relative to some demarcation frequency. (Often 10 Hz or 20 Hz for DS1 or E1, higher for SONET/SDH clocks.) Jitter parameters given in this data sheet are total timing jitter numbers, not cycle-to-cycle jitter.
4.2
Jitter Generation (Intrinsic Jitter)
Jitter generation is the measure of the jitter produced by the PLL and is measured at its output. It is measured by applying a reference signal with no jitter to the input of the device, and measuring its output jitter. Jitter is usually measured with various band limiting filters depending on the applicable standards.
4.3
Jitter Transfer
Jitter transfer or jitter attenuation refers to the magnitude of jitter at the output of a device for a given amount of jitter at the input of the device. Input jitter is applied at various amplitudes and frequencies, and output jitter is measured with various filters depending on the applicable standards.
4.4
Lock Time
This is the time it takes the PLL to frequency lock to the input signal. Phase lock occurs when the input signal and output signal are aligned in phase with respect to each other within a certain phase distance (not including jitter). Lock time is affected by many factors which include: * * * initial input to output phase difference initial input to output frequency difference PLL loop filter bandwidth
The presence of input jitter makes it difficult to define when the PLL is locked as it may not be able to align its output to the input within the required phase distance, dependent on the PLL bandwidth and the input jitter amplitude and frequency.
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ZL30110
5.0 Applications
Data Sheet
This section contains ZL30110 application specific details for power supply decoupling, reset operation, clock and crystal operation.
5.1
Power Supply Decoupling
Jitter levels on the ZL30110 output clocks may increase if the device is exposed to excessive noise on its power pins. For optimal jitter performance, the ZL30110 device should be isolated from noise on power planes connected to its 3.3 V and 1.8 V supply pins. For recommended common layout practices, refer to Zarlink Application Note ZLAN-178.
5.2
Master Clock
The ZL30110 can use either a clock or crystal as the master timing source.
5.2.1
Clock Oscillator
When selecting a clock oscillator, numerous parameters must be considered. This includes absolute frequency, frequency change over temperature, output rise and fall times, output levels, duty cycle and phase noise. The output clock should be connected directly (not AC coupled) to the OSCi input of the ZL30110, and the OSCo output should be left open as shown in Figure 5. 1 2 3 4 Frequency Tolerance Rise & fall time Duty cycle 25 MHz as required (better than +/-50ppm) < 8 ns 40% to 60%
Table 1 - Clock Oscillator Specification
ZL30110
OSCi
+3.3 V
+3.3 V 25 MHz OUT GND
0.1 F
OSCo No Connection
Figure 5 - Clock Oscillator Circuit
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ZL30110
5.2.2 Crystal Oscillator
Data Sheet
Alternatively, a Crystal Oscillator may be used. The accuracy of a crystal oscillator depends on the crystal tolerance as well as the load capacitance tolerance. Typically, for a 25 MHz crystal specified with a 32 pF load capacitance, each 1 pF change in load capacitance contributes approximately 9 ppm to the frequency deviation. Consequently, capacitor tolerances and stray capacitances have a major effect on the accuracy of the oscillator frequency. The crystal should be a fundamental mode type - not an overtone. The fundamental mode crystal permits a simpler oscillator circuit with no additional filter components and is less likely to generate spurious responses. A typical crystal oscillator specification is shown in Table 2.
.
1 2 3 4 5 6
Frequency Tolerance Oscillation mode Resonance mode Load capacitance Maximum series resistance
25 MHz as required (better than +/-50ppm) fundamental parallel as required 50
Table 2 - Crystal Oscillator Specification
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ZL30110
5.3 Power Up Sequence
Data Sheet
The ZL30110 requires that the 3.3 V supply is not powered up after the 1.8 V supply. This is to prevent the risk of latch-up due to the presence of protection diodes in the IO pads. Two options are given: 1. Power-up the 3.3 V supply fully first, then power up the 1.8 V supply 2. Power up the 3.3 V supply and the 1.8 V supply simultaneously, ensuring that the 3.3 V supply is never lower than a few hundred millivolts below the 1.8 V supply (e.g., by using a schottky diode or controlled slew rate)
5.4
Reset Circuit
A simple power up reset circuit with about a 60 s reset low time is shown in Figure 6. Resistor RP is for protection only and limits current into the RST pin during power down conditions. The reset low time is not critical but should be greater than 300 ns.
ZL30110 +3.3 V R 10 k RST RP 1 k
C 10 nF
Figure 6 - Power-Up Reset Circuit
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ZL30110
6.0
6.1
Data Sheet
Characteristics
AC and DC Electrical Characteristics
Parameter Symbol VDD_R VCORE_R VPIN VOSC IPIN TST VESD -55 Min. -0.5 -0.5 -0.5 -0.3 Max. 4.6 2.5 6 VDD + 0.3 30 125 2k Units V V V V mA C V
Absolute Maximum Ratings*
1 2 3 4 5 6 7
Supply voltage Core supply voltage Voltage on any digital pin Voltage on OSCi and OSCo pin Current on any pin Storage temperature ESD rating
* Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied. * Voltages are with respect to ground (GND) unless otherwise stated.
Recommended Operating Conditions* Characteristics 1 2 3 4 Supply voltage Core supply voltage Operating temperature Input Voltage Sym. VDD VCORE TA VI Min. 3.1 1.7 -40 0 Typ. 3.3 1.8 25 3.3 Max. 3.5 1.9 85 3.5 Units V V C V
* Voltages are with respect to ground (GND) unless otherwise stated.
DC Electrical Characteristics* Characteristics 1 2 3 4 5 Supply current Core supply current Schmitt trigger Low to High threshold point Schmitt trigger High to Low threshold point Input leakage current Sym. IDD ICORE VCIH VCIL IIL 1.43 0.8 -105 Min. Max. 115 20 1.85 1.1 105 Units mA mA V V A VI=VDD or 0 V Notes All Outputs loaded with 30 pf All Outputs loaded with 30 pf
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ZL30110
DC Electrical Characteristics* Characteristics 6 High-level output voltage Sym. VOH Min. 2.4 Max. Units V
Data Sheet
Notes IOH = 8 mA for clock outputs, 4 mA for status outputs IOL = 8 mA for clock outputs, 4 mA for status outputs
7
Low-level output voltage
VOL
0.4
V
* Supply voltage and operating temperature are as per Recommended Operating Conditions. * Voltages are with respect to ground (GND) unless otherwise stated.
AC Electrical Characteristics* - Timing Parameter Measurement Voltage Levels (see Figure 7). Characteristics 1 2 3 Threshold Voltage Rise and Fall Threshold Voltage High Rise and Fall Threshold Voltage Low Sym. VT VHM VLM CMOS 0.5xVDD 0.7xVDD 0.3xVDD Units V V V
* Supply voltage and operating temperature are as per Recommended Operating Conditions. * Voltages are with respect to ground (GND) unless otherwise stated.
Timing Reference Points ALL SIGNALS tIRF, tORF tIRF, tORF V HM VT V LM
Figure 7 - Timing Parameter Measurement Voltage Levels
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Zarlink Semiconductor Inc.
ZL30110
AC Electrical Characteristics* - Timing for input reference (see Figure 8). Characteristics 1 2 3 4 5 8 kHz reference period 2.048 MHz reference period 8.192 MHz reference period 16.384 MHz reference period reference pulse width high or low Symbol tREF8kP tREF2P tREF8P tREF16P tREFW Min. 120 263 63 38 15 Typ. 125 488 122 61
Data Sheet
Max. 128 712 175 75
Units s ns ns ns ns
* Supply voltage and operating temperature are as per Recommended Operating Conditions. * Period Min/Max values are the limits to avoid a single-cycle fault detection. Short-term and long-term average periods must be within +/-130 ppm limit.
AC Electrical Characteristics* - Input to output timing for synchronous clock (see Figure 8). Characteristics 1 2 3 4 5 6 8 kHz reference input to C65o delay 2.048 MHz reference input to C65o delay 8.192 MHz reference input to C65o delay 16.384 MHz reference input to C65o delay C65o pulse width low Output clock rise or fall time Symbol tREF8_C65D tREF2_C65D tREF8_C65D tREF16_C65D tC65L tORF Min. -0.7 1.5 2.1 2.1 7.0 1.1 Max. 6.7 9.6 9.2 9.6 8.6 2.3 Units ns ns ns ns ns ns
* Supply voltage and operating temperature are as per Recommended Operating Conditions. Outputs loaded with 30 pF. tREFP tREFW tREFW
REF
tREF_C65D
tC65L
C65o
Figure 8 - Input to Output Timing for Synchronous Clock
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Zarlink Semiconductor Inc.
ZL30110
Characteristics 1 25 MHz master clock input to C25a/b/c/d/e/fo delay Symbol tM_C25D Min. 3 Max. 14 Units ns
Data Sheet
AC Electrical Characteristics* - Input to output timing for Asynchronous clocks (see Figure 9). Notes
* Supply voltage and operating temperature are as per Recommended Operating Conditions.
Master Clock
Asynchronous Output Clocks 25MHz
tM_C25D
Figure 9 - Asynchronous Clocks Input to Output Timing
AC Electrical Characteristics* - Output timing for Asynchronous clocks (see Figure 9). Characteristics 1 2 3 4 C25a/b/c/d/e/fo pulse width low** C125o pulse width low C100o pulse width low C66o pulse width low Symbol tC25L tC125L tC100L tC66L Min. 18 3.2 4.1 6.8 Max. 22 4.6 5.6 8.0 Units ns ns ns ns Notes 30 pF output load 25 pF output load 30 pF output load 30 pF output load
* Supply voltage and operating temperature are as per Recommended Operating Conditions. ** Buffered OSCi clock input, characterization data did not account for input clock duty cycle nor rise/fall time degradation.
6.2
Performance Characteristics
Characteristics Min. -130 Typ. Max. +130 Units ppm Notes The 25 MHz Master Clock oscillator set at 0.ppm input reference = 8 kHz, 100 ppm frequency offset input reference 8 kHz, 100 ppm frequency offset
Performance Characteristics* - Functional
1
DPLL capture range
Lock Time 2 DPLL 58 Hz Filter 1 s
3
DPLL 922 Hz Filter
1
s
4
APLL 450 kHz Filter
150
s
* Supply voltage and operating temperature are as per Recommended Operating Conditions.
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Zarlink Semiconductor Inc.
ZL30110
Performance Characteristics* - Unfiltered Jitter Generation - Pk-Pk Characteristics 1 3 4 5 6 C65o (65.536 MHz) C25a/b/c/d/e/fo (25 MHz) C125o (125 MHz) C100o (100 MHz) C66o (66 MHz) Max. [nspp] 0.60 0.20 0.54 0.60 0.60 Notes
Data Sheet
* Supply voltage and operating temperature are as per Recommended Operating Conditions.
Performance Characteristics* - Filtered Jitter Generation - RMS Characteristics 1 2 C25a/b/c/d/e/fo (25 MHz) - (625 kHz - Nyquist) C125o (125 MHz) (625 kHz - Nyquist) Max. [psrms] 4 20 Notes
* Supply voltage and operating temperature are as per Recommended Operating Conditions.
19
Zarlink Semiconductor Inc.
c Zarlink Semiconductor 2003 All rights reserved.
Package Code Previous package codes
ISSUE ACN DATE APPRD.
1 CDCA
2 CDCA
3 CDCA
30-01-2004 15-08-2005 22-08-2005
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