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 SY87724L
3.3V AnyRate(R) MUX/DEMUX Up to 2.7GHz
General Description
The SY87724L is a complete serial data multiplexer and demultiplexer, capable of operating at up to 2.7GHz. The device provides for muxing and demuxing to 4, 5, 8, or 10 bit wide buses. The SY87724L can accept a synchronous code group or octet boundary input, and uses this input for parallel data alignment. The SY87724L is manufactured in Micrel's high performance ASSET2TM silicon bipolar process. Micrel provides a complete protocol transparent solution with the AnyRate(R) SY87721L CDR/CMU SY87729L, and the SY87724L integrated MUX/DEMUX. Datasheets and support documentation can be found on Micrel's web site at www.micrel.com.
Features
* Protocol transparent MUX/DEMUX operation up to 2.7GHz * Programmable to 4, 5, 8, or 10 bit parallel interfaces * Differential clock and serial inputs/outputs * Easily controlled by framer logic * Synchronous frame boundary indication * HSPC (High Speed PECL-Compatible) inputs and outputs * 3.3V power supply * Available in 80-pin EPAD-TQFP
Applications
* * * * * * OC-3, OC-12, OC-48, ATM, InfiniBand Gigabit Ethernet Fibre Channel, 2X Fibre Channel SMPTE-259 and 292 Proprietary optical transport ITU G. 975 Solutions
___________________________________________________________________________________________________________
System Block Diagram
AnyRate and AnyClock are registered trademarks of Micrel, Inc. Micrel Inc. * 2180 Fortune Drive * San Jose, CA 95131 * USA * tel +1 (408) 944-0800 * fax + 1 (408) 474-1000 * http://www.micrel.com
March 2008
M9999-032608-B hbwhelp@micrel.com or (408) 955-1690
Micrel, Inc.
SY87724L
Ordering Information
Part Number SY87724LHEI SY87724LHEY SY87724LHI SY87724LHY SY87724LHG
Note: 1. Other Voltage available. Contact Micrel for details.
Package Type H80-2 H80-2 H80-1 H80-1 H80-1
Operating Range Industrial Industrial Industrial Industrial Industrial
Package Marking SY87724LHEI SY87724LHEY with Pb-Free bar line indicator SY87724LHI SY87724LHY with Pb-Free bar line indicator SY87724LHG with Pb-Free bar line indicator
Lead Finish Sn-Pb Matte-Sn Pb-Free Sn-Pb Matte-Sn Pb-Free NiPdAu Pb-Free
Status Active Active Discontinued Discontinued Discontinued
Pin Configuration
80-Pin EPAD-TQFP (H80-2)
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Micrel, Inc.
SY87724L
Functional Block Diagram
DEMUX
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Micrel, Inc.
SY87724L
MUX
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Micrel, Inc.
SY87724L
Pin Description
COMMON LPBK - TTL Input This pin defines whether a device exhibits local loopback or not, as per the following table. Loopback internally connects MUX serial out to demux serial in, thus the user may expect MUX side parallel data to appear on the demux parallel output pins.
LPBK 0 1 Functioning Loopback Normal
previously set boundary, the DPOUTCK signal will always occur later than would be expected. That is, there will never be a short DPOUTCK pulse. DP0 through DP4 - Differential PECL Output These signals may be used as either differential, or single-ended. When converting to 4 or 5 bits, speed issues may encourage the use of these signals differentially. When converting to wider than 5 bits, these signals are to be used single-ended. Please refer to the applications section for further details. DP5 through DP9 - PECL Output These are the rest of the parallel output bits, to be used when converting to wider than 5 bits. Which bits are valid depends on the values of SIZ0, SIZ1, and SIZ2. Please refer to the table in the applications section for further details. DPOUTCK - Differential HSPC Output This signal is used to strobe the DP0-9 data. It is used differentially when converting to 4 or 5 bits, and is used single-ended when converting to wider than 5 bits. The clock rate of the line will be determined by the DCKIN signal, and by the setting of the SIZ bits. This output always provides valid differential logic levels. MUX MP0-9 - PECL Input These bits accept data for muxing wider than 5 bits. MPINCK+, used single-ended, determines when this data may change. Please refer to the table in the description for which pins represent what bits for various widths. MPF0-4 - Differential PECL Input These signals are used when muxing 4 or 5 bits of parallel data. MPINCK determines when this data may change. Please refer to the MUX table in the description for which pins represent what bits for various widths. MTXCLK - Differential HSPC Input This is the serial rate clock input to the MUX. It determines the rate at which serial data will be shifted out of the MUX. MSOUT - Differential PECL Output This signal is the serialized data output.
Table 1. LPBK Input Pin Function
SIZ0, SIZ1, SIZ2 - TTL Input These three signals determine the width of the parallel output, as well as the width of parallel input. The following table describes the parallel width options.
Width 4 5 8 10 Undefined SIZ0 0 1 0 1 X SIZ1 0 0 1 1 X SIZ2(1) 0 0 0 0 1
Table 2. SIZ0, SIZ1, SIZ2 Input Truth Table
Note: 1. Pin 8 (SIZ2) should always be tied to a TTL logic level LOW.
DEMUX DSIN - Differential HSPC Input This is the serial input to the SY87724L demux. It accepts the serial data and converts it to parallel data. It is ignored during loopback. DCKIN - Differential HSPC Input This is the bit rate clock that feeds serial data into the demux shift register. This signal also feeds the demux strobe generator and primary divider, except during loopback. DFMIN - Differential HSPC Input This is the frame alignment input signal. This signal resets the primary divider, as well as the strobe generator. This effectively sets the alignment for the parallel data being demuxed. Usually, DFMIN asserts one DCKIN before a parallel word boundary, and continues to assert one clock before every boundary. However, DFMIN need only occur once for proper operation. Should DFMIN assert at other than a March 2008 5
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Micrel, Inc. OTHER VCC Supply Voltage VCCO GND NC
Note:
SY87724L
MPINCK - Differential PECL Output This signal indicates when the next set of parallel bits may be presented to the SY87724L for muxing. For muxing wider than 5 bits, MPINCK+ is used singleended. These signals always provide valid differential clock signals regardless of single-ended or differential data mode.
Output Supply Voltage Ground These pins are reserved and are to be left unconnected.
1. All differential outputs always provide valid differential logic levels regardless of differential or single-ended use.
March 2008
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Micrel, Inc.
SY87724L
Description
General The SY87724L MDM is designed to perform muxing and demuxing at up to 2.7GHz speeds. The device can simultaneously MUX and demux up to 10 bits of full duplex data. In addition, a full parallel-to-parallel loopback function is implemented, such that parallel data out will loop back to parallel data in, with the device internally connecting the serial output to the serial input. Narrow DeMUX In this example, serial data is converted into 4 or 5 bit wide data. Because this can result in very high data rates on the parallel outputs, they are differential. The DFMIN input indicates, synchronously with DCKIN, and one clock ahead, the start of a 4 or 5 bit boundary.
Figure 2. Wide DeMUX
As in the narrow case, DPOUTCK will never assert twice in 8 or 10 DCKIN cycles. Should a DFMIN assertion change the MDM's 8 or 10 bit boundary, DPOUTCK assertion will be delayed and there will never be a short assertion. For 8 bit output, DP4 and DP9 are not used. The following table summarizes the available bit widths. The right column shows the parallel bits, in sequence from first in serially, to last in.
Width 4 5 8 10 Sequence DP0, DP1, DP2, DP3 DP0, DP1, DP2, DP3, DP4 DP0+, DP1+, DP2+, DP3+, DP5, DP6, DP7, DP8 DP0+, DP1+, DP2+, DP3+, DP4+, DP5, DP6, DP7, DP8, DP9 Table 3. Output Pins for Different Width DeMUX
Figure 1. Narrow DeMUX
Every DFMIN assertion will trigger a new 4 or 5 bit boundary. Should only one DFMIN assertion occur, then DPOUTCK will continue to assert every 4 or 5 DCKIN clocks. Should a subsequent DFMIN assertion reset the 4 or 5 bit boundary, then DPOUTCK will always result in a longer assertion, not a shorter one. For example, if a subsequent DFMIN resets a 5 bit boundary after the second bit in relation to a previous boundary, then the next DPOUTCK will always occur 7 DCKIN later, never 2 DCKIN later. For four bit output, DP5 are not used. Wide DeMUX The more typical case will be to convert the serial data stream into 8 or 10 bit wide data. Because the worst case parallel transfer rate is on the order of 250 to 340 Megatransfers per second, single ended parallel output is preferred. Thus, only the single-ended side of the differential outputs is used. This example is much like the narrow demux, except now DFMIN indicates 8 or 10 bit boundaries.
Narrow MUX In this scenario, 4 or 5 bit wide parallel data is converted to a serial bit stream. Because this can result in very high data rates on the parallel inputs, they are differential. In this mode of operation, there is no external synchronization, and the MPINCK signal pair has arbitrary phase with respect to the MTXCLK clock, which clocks the MUX output shift register.
Figure 3. Narrow MUX
MPINCK indicates when MDM is ready to accept more data. It is derived from MTXCLK, with an arbitrary phase relationship.
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Micrel, Inc. Wide MUX The more typical case will be to convert 8 or 10 bit wide parallel data words into a serial bit stream. Because the worst case parallel input rate is on the order of 250 to 340 Mega-transfers per second, single-ended parallel inputs are used. This scenario is much like the narrow MUX case, except now MPINCK+ clocks slower, for 8- or 10-bit parallel words.
SY87724L data presented to the parallel inputs will appear, some small but unspecified time later, at the parallel outputs.
Figure 5. Loopback Function
Figure 4. Wide MUX
Note that the input data indication is now single ended, and that completely different input pins are used, as compared to the 4 or 5 bit case. The following table summarizes the available bit widths. The right column shows the parallel input bits, such as they will appear in the serial output stream.
Width 4 5 8 10 Sequence MPF0, MPF1, MPF2, MPF3 MPF0, MPF1, MPF2, MPF3, MPF4 MP5, MP6, MP7, MP8, MP0, MP1, MP2, MP3 MP5, MP6, MP7, MP8, MP9, MP0, MP1, MP2, MP3, MP4 Table 4. Output Pins for Different Width MUX
Loopback To ease system design, the SY87724L MDM has the capability to loop parallel data in, through the MUX, into the demux, and back to parallel data out. This permits system check-out through to the individual MDM device. Note that, for a full check-out, some form of loopback further down the serial stream is required. Loopback is incorporated into MDM by modifying the serial clock, data, and sync inputs to the demux stage. During loopback, the source of serial information for the demux is changed. The MSOUT, MTXCLK and MSYNOUT are internally muxed to the DSIN, DCKIN, and DFMIN nodes of the demux section. The MSYNOUT signal has the same characteristics as the DFMIN logic expects. This exercises the internal data path, both MUX and demux, for MDM, and also the control logic. The parallel March 2008 8
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Micrel, Inc.
SY87724L
Absolute Maximum Ratings(1)
Supply Voltage (VCC).................................... -0.5V to +3.8V Input Voltage (VIN). ................................. -0.5V to VCC(3) ECL Output Current (IOUT) Continuous............................................................50mA Surge ..................................................................100mA Lead Temperature (soldering, 20sec.)..................... +260C Storage Temperature (Ts) ........................... -65C to 150C
Operating Ratings(2)
Supply Voltage (VIN)................................. +3.15V to +3.45V Ambient Temperature (TA) .......................... -40C to +85C Junction Thermal Resistance EPAD-TQFP (JA) Still-air ..................................21C/W EPAD-TQFP (JA) @ 200 LFM(5) .......................15C/W
DC Electrical Characteristics
VCC = VCCA = 3.15V to 3.45V; TA = -40C to+85C, unless noted.
Symbol VCC ICC Parameter Power Supply Voltage Power Supply Current Condition Min 3.15 Typ 3.3 650 Max 3.45 750 Units V mA
HSPC DC Electrical Characteristics
VCC = VCCA = 3.15V to 3.45V; TA = -40C to+85C, unless noted.
Symbol VIH VIL IIL VOH VOL VOSW Parameter Input HIGH Voltage Input LOW Voltage Input LOW Current Output HIGH Voltage Output LOW Voltage Output Voltage Differential Swing VIN = VIL (Min) 50 to VCC-2V 50 to VCC-2V Condition Min VCC-1.165 VCC-1.810 -0.5 VCC-1.0 VCC-1.55 0.3 VCC-0.75 VCC-1.25 Typ Max VCC-0.880 VCC-1.475 Units V V A V V V
PECL DC Electrical Characteristics
VCC = VCCA = 3.15V to 3.45V; TA = -40C to+85C, unless noted.
Symbol VIH VIL IIL VOH VOL VOSW
Notes: 1. 2. 3. 4. Exceeding the absolute maximum rating may damage the device. The device is not guaranteed to function outside its operating rating. The maximum value is specified at VCC up to VCC = +6V. It is recommended for the part to be used with 200 LFM airflow.
Parameter Input HIGH Voltage Input LOW Voltage Input LOW Current Output HIGH Voltage Output LOW Voltage Output Voltage Differential Swing
Condition
Min VCC-1.165 VCC-1.810
Typ
Max VCC-0.880 VCC-1.475 VCC-0.830 VCC-1.570
Units V V A V V V
VIN = VIL (Min) 50 to VCC-2V 50 to VCC-2V
-0.5 VCC-1.075 VCC-1.860 0.6
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Micrel, Inc.
SY87724L
TTL DC Electrical Characteristics
VCC = VCCA = 3.15V to 3.45V; TA = -40C to+85C, unless noted.
Symbol VIH VIL IIH IIL Parameter Input HIGH Voltage Input LOW Voltage Input HIGH Current VIN = 2.7V, VCC = Max. VIN = VCC, VCC = Max. Input LOW Current VIN = 0.5V, VCC = Max. Condition Min 2.0 0.8 +20 +100 300 Typ Max Units V V A A A
March 2008
10
M9999-032608-B hbwhelp@micrel.com or (408) 955-1690
Micrel, Inc.
SY87724L
AC Electrical Characteristics
VCC = VCCA = 3.15V to 3.45V; TA = -40C to+85C, unless noted.
Symbol fMAX tDCKPWH, tDCKPWL tDSDS tDSDH tDSFS tDSFH tDPDP tDPSP tMCKPWH tMCKPWL tMPDS tMPDH tMPSS tMPSH tR, tF Parameter Maximum Operating Frequency Demux Clock Pulse Duty Cycle Demux Serial Data Set-Up Demux Serial Data Hold Demux Serial Frame Set-Up Demux Serial Frame Hold Demux Parallel Differential Propagation Demux Parallel Single-Ended Propagation MUX Clock Pulse Duty Cycle MUX Parallel Differential Set-Up(1) MUX Parallel Differential Hold(1) MUX Parallel Single-Ended Set-Up(1) MUX Parallel Single-Ended Hold(1) Output Rise/Fall Times MCKOUT, MSOUT, MSYNOUT All Others 50 to VCC-2V (20% to 80%) Condition Min 2.7 45 200 0 150 50 +200 +200 45 tCYC+650 - (tCYC+250) tCYC+850 -(tCYC+50) 100 120 500 +800 +1200 55 55 Typ Max Units GHz % ps ps ps ps ps ps % ps ps ps ps ps
Notes: 1. tCYC = the period of the clock being fed into MTXCLK.
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Micrel, Inc.
SY87724L
Timing Waveforms
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Micrel, Inc.
SY87724L
Timing Application Example
Notes: 1. MTXCLK = 1Gbps. 2. Time "x" is approximately equal to time "y." 3. Set-up and hold for MPF0-4 conditional on the MTXCLK rising edge just prior to the MTXCLK rising edge that causes an MPINCK rising edge.
March 2008
13
M9999-032608-B hbwhelp@micrel.com or (408) 955-1690
Micrel, Inc.
SY87724L
Package Information(1, 2)
80-Pin EPAD-TQFP (14 x 14 x 1.0mm) (H80-2)
Notes: 1. Exposed pads must be soldered to a ground plane for proper thermal management. 2. It is recommended for the part to be used with 200LFM airflow.
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. (c) 2008 Micrel, Incorporated.
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