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COMMUNICATION SEMICONDUCTORS
MX614
Bell 202 Compatible Modem
PRELIMINARY INFORMATION
DATA BULLETIN
Features
* * * * 1200bps - 1800bps half duplex Bell 202 Compatible Modem Optional 1200bps Data Retiming Facility can eliminate external UART Optional 5bps and 150bps Back Channel Optional Line Equalization
Applications
* * Low Voltage Operation (3.3V to 5.0V) Low Power Operation 1mA typ. @ 3.3V Operating Mode 1A typ. Zero-Power Mode * * Standard 3.58MHz Xtal/Clock Telephone Telemetry Applications
Status
Telephone Line
Line Interface
Control
MX614
Data
C
The MX614 is a low voltage, low power CMOS integrated circuit designed for the reception or transmission of asynchronous 1200bps data. This device is compatible with Bell 202 type systems. The MX614 supports 5bps and 150bps 'back channel' operation. Asynchronous data rates up to 1818bps are also supported. The MX614 provides an optional Tx and Rx data retiming function which can eliminate, based on user preference, the need for a UART in the associated C when operating at 1200bps. An optional line equalizer has been incorporated into the receive path and is controlled by an external logic level. The MX614 may be used in a wide range of telephone telemetry systems. A very low current "Zero Power Mode (1A typ.) and an operating current of 1mA typ. @ VDD = 3.3V, make the MX614 ideal for portable, terminal and line powered applications. A standard 3.58MHz Xtal/Clock is required and the device operates from a 3.0V to 5.5V supply. The MX614 is available in 24-pin TSSOP (MX614TN), 16-pin SOIC (MX614DW) and 16-pin PDIP (MX614P) packages.
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Bell 202 Compatible Modem
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MX614 PRELIMINARY INFORMATION
CONTENTS
Section Page
1. Block Diagram ................................................................................................................. 3 2. Signal List........................................................................................................................ 4 3. External Components ..................................................................................................... 5 4. General Description ........................................................................................................ 6
4.1 Xtal Osc and Clock Dividers....................................................................................................6 4.2 Mode Control Logic .................................................................................................................6 4.3 Rx Input Amplifier....................................................................................................................6 4.4 Receive Filter and Equalizer ...................................................................................................6 4.5 Energy Detector ......................................................................................................................7 4.6 FSK Demodulator....................................................................................................................7 4.7 FSK Modulator and Transmit Filter .........................................................................................8 4.8 Rx Data Retiming ....................................................................................................................9 4.9 Tx Data Retiming ..................................................................................................................10
5. Application Notes.......................................................................................................... 12
5.1 Line Interface ........................................................................................................................12
6. Performance Specification........................................................................................... 13
6.1 Electrical Performance ..........................................................................................................13 6.2 Packaging .............................................................................................................................16
MX*COM, Inc. reserves the right to change specifications at any time and without notice.
2000 MX-COM, INC.
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Doc. # 20480162.004
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Bell 202 Compatible Modem
3
MX614 PRELIMINARY INFORMATION
1. Block Diagram
XTAL/ CLOCK XTAL VDD VBIAS VSS RXAMPOUT RXIN
Xtal Osc and Clock Dividers Energy Detect Mode Control Logic Receive Filter and Equalizer VBIAS FSK De-modulator Rx/Tx Data Re-timing Transmit Filter and Output Buffer FSK Modulator
RXEQ DET M1 M0 RXD CLK RDY TXD
TXOUT
Figure 1: Block Diagram
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Bell 202 Compatible Modem
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MX614 PRELIMINARY INFORMATION
2. Signal List
Pin No. P, DW 1 2 3 4 5 6 7 8 9 TN 1 2 5 6 7 8 11 12 13 Signal Name
XTAL
Description Type output input input input input output output Power output Output of the on-chip Xtal oscillator inverter. Input to the on-chip Xtal oscillator inverter. A logic level input for setting the mode of the device. See section 4.2 A logic level input for setting the mode of the device. See section 4.2 Input to the Rx input amplifier. Output of the Rx input amplifier Output of the FSK generator. Negative supply (ground). Internally generated bias voltage, held at VDD/2 when the device is not in 'Zero-Power' mode. Should be bypassed to VSS by a capacitor mounted close to the device pins. A logic level input for enabling/disabling the equalizer in the receive filter. See section 4.4 A logic level input for either the raw input to the FSK Modulator or data to be re-timed depending on the state of the M0, M1 and CLK inputs. See section 4.9 A logic level input which may be used to clock data bits in or out of the FSK Data Retiming block. A logic level output carrying either the raw output of the FSK Demodulator or re-timed characters depending on the state of the M0, M1 and CLK inputs. See section 4.8 A logic level output of the on-chip Energy Detect circuit. "Ready for data transfer" output of the on-chip data retiming circuit. This open-drain active low output may be used as an Interrupt Request/Wake-up input to the associated C. An external pull-up resistor should be connected between this output and VDD. Positive supply. Levels and thresholds within the device are proportional to this voltage. Should be bypassed to VSS by a capacitor mounted close to the device pins. No internal connection
XTAL/CLOCK M0 M1 RXIN RXAMPOUT TXOUT VSS VBIAS
10 11
14 17
RXEQ TXD
input input
12 13
18 19
CLK RXD
input output
14 15
20 23
DET RDY
output output
16
24
VDD
Power
3, 4, 9, 10, 15, 16, 21, 22
N/C
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Bell 202 Compatible Modem
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MX614 PRELIMINARY INFORMATION
3. External Components
VDD C1
X1
C2
XTAL
1 2 3 4 5 6 7 8
16 15 14
VDD RDY DET RXD CLK TXD RXEQ VBIAS
R1
C3
XTAL/CLOCK
M0 From C M1 RXIN RXAMPOUT TXOUT VSS
MX614
13 12 11 10 9
C4
R1 C1 C2 C3 C4 X1 Note 1
100k 18pF 0.1F 0.1F 3.579545MHz
5% 10% 10% 10%
Figure 2: Recommended External Components for Typical Application External Components Notes 1. IMPORTANT: This device is capable of detecting and decoding small amplitude signals. To achieve this VDD and VBIAS decoupling and protecting the receive path from extraneous in-band signals are very important. It is recommended that the decoupling capacitors be placed so that connections between them and the device pins are as short as practicable e.g. 1 inch from device pins. A ground plane protecting the receive path will help attenuate interfering signals 2. A crystal frequency of 3.579545MHz 0.1% is required for correct FSK operation. For best results, a crystal oscillator design should drive the clock inverter input with signal levels of at least 40% of VDD peak-peak. Tuning fork crystals generally cannot meet this requirement. To obtain crystal oscillator design assistance, consult your crystal manufacturer.
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To/From C
Bell 202 Compatible Modem
6
MX614 PRELIMINARY INFORMATION
4. General Description
4.1 Xtal Osc and Clock Dividers
Frequency and timing accuracy of the MX614 is determined by a 3.579545MHz clock signal present at the XTAL/CLOCK pin. This may be generated by the on-chip oscillator inverter using the external components C1, C2 and X1 of Figure 2, or may be supplied from an external source to the XTAL/CLOCK input. If supplied from an external source, C1, C2 and X1 should not be fitted. The on-chip oscillator is turned off in the 'Zero-Power' mode. If the clock is provided by an external source which is not always running, then the 'Zero-Power' mode must be set when the clock is not available. Failure to observe this rule may cause a significant rise in the supply current drawn by MX614 as well as generating undefined states of the RXD, DET and RDY outputs.
4.2 Mode Control Logic
The MX614's operating mode is determined by the logic levels applied to the M0 and M1 input pins: M1 0 0 1 1 M0 0 1 0 1 Rx Mode 1200bps Off 1200bps 'Zero-Power' Tx Mode 150bps 1200bps Off / 5bps Data Retime[1] Rx Tx Rx -
[1] If enabled Note: On applying power to the device, the mode must be set to 'ZP', i.e. M0 = '1', M1 = '1', until VDD has stabilized. In the 'Zero-Power' (ZP) mode, power is removed from all internal circuitry. When leaving the 'ZP' mode there must be a delay of 20ms before any Tx data is passed to, or Rx data read from the device to allow the bias level, filters, and oscillator to stabilize.
4.3 Rx Input Amplifier
This amplifier is used to adjust the received signal to the correct amplitude for the FSK receiver and Energy Detect circuits (see section 5.1).
4.4 Receive Filter and Equalizer
The Receive Filter and Equalizer section is used to attenuate out of band noise and interfering signals, especially the locally generated transmit tones which might otherwise reach the 1200bps FSK Demodulator and Energy Detector circuits. This block also includes a switchable equalizer section. When the RXEQ pin is low, the overall group delay of the receive filter is flat over the 1200bps frequency range. If the RXEQ pin is high the receive filter's typical overall group delay will be as shown in Figure 3.
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Bell 202 Compatible Modem
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MX614 PRELIMINARY INFORMATION
0.025
Delay/ms
0
-0.025
-0.05
-0.075
-0.1
-0.125
-0.15 500 1000 1500
Frequency/Hz
2000
2500
Figure 3: Rx Equalizer Group Delay (RXEQ = '1') wrt 1700Hz
4.5 Energy Detector
This block operates by measuring the level of the signal at the output of the Receive Filter, and comparing it against a preset threshold. The DET output will be set high when the level has exceeded the threshold for a sufficient period of time. Amplitude and time hysteresis are used to reduce chattering of the DET output in marginal conditions. Note that this circuit may also respond to non-FSK signals such as speech.
Line Signal DET M0, M1
TeON
FSK signal TeOFF
FSK Receive mode
See section 6.1 for definitions of TeON and TeOFF
Figure 4: FSK Level Detector Operation
4.6 FSK Demodulator
This block converts the 1200bps FSK input signal to a logic level received data signal which is output via the RXD pin as long as the Data Retiming function is not enabled (see section 4.8). This output does not depend on the state of the DET output. When the Rx 1200bps mode is 'Off' or in 'ZP' the DET and RXD pins are held low. Note that in the absence of a valid FSK signal, the demodulator may falsely interpret speech or other extraneous signals as data. For this reason it is advised that the RXD pin is read only when data is expected.
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Bell 202 Compatible Modem
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MX614 PRELIMINARY INFORMATION
4.7 FSK Modulator and Transmit Filter
These blocks produce a tone according to the TXD, M0 and M1 inputs as shown in the table below, assuming data retiming is not being used: M1 1 1 0 0 Note: [1] M0 1 0 0 1 TXD = 0 0Hz[1] 487Hz 2200Hz TXD = 1 387Hz 387Hz 1200Hz
TXOUT held at approx. VDD/2.
When modulated at the appropriate baud rates, the Transmit Filter and associated external components (see section 5.1) limit the FSK out of band energy sent to the line in accordance with Figure 5 and Figure 6, assuming that the signal on the line is at -6dBm or less.
0 dBm -10
-20
3400 Hz
-30
-40
250 Hz
1300 Hz
-50
-60
28 kHz
-70 10 100 1000 10000 Frequency / Hz 100000
Figure 5: Tx limits at 5bps and 150bps rate
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Bell 202 Compatible Modem
0 dBm -10
9
MX614 PRELIMINARY INFORMATION
-20
-30
-40
450 Hz 3400 Hz
-50
-60
28 kHz
-70 10 100 1000 10000 Frequency / Hz 100000
Figure 6: Tx limits at 1200bps rate
4.8 Rx Data Retiming
This function may be used when the received data consists of 1200bps asynchronous characters, each character consisting of one start bit followed by a minimum of 9 formatted bits as shown in the table below. Note: Rx Data Retiming is not supported for data rates exceeding 1212bps. Data bits 7 7 8 8 9 Parity bits 0 1 0 1 0 Stop bits 2 1 1 1 1
The Data Retiming block, when enabled in receive mode, extracts the first 9 bits of each character following the start bit from the received asynchronous data stream, and presents them to the C under the control of strobe pulses applied to the CLK input. The timing of these pulses is not critical and they may easily be generated by a simple software loop. This facility removes the need for a UART in the C without incurring an excessive software overhead. The receive retiming block consists of two 9-bit shift registers, the input of the first is connected to the output of the FSK demodulator and the output of the second is connected to the RXD pin. The first register is clocked by an internally generated signal that stores the 9 received bits following the timing reference of a high to low transition at the output of the FSK demodulator. When the 9th bit is clocked into the first register these 9 bits are transferred to the second register, a new stop-start search is initiated and the CLK input is sampled. If the CLK input is low at this time the RDY pin is pulled low and the first received bit is output on the RXD pin. The CLK pin should then be pulsed high 9 times, the first 8 high to low transitions will be used by the device to clock out the bits in the second register. The RDY output is cleared the first time the CLK input goes high. At the end of the 9th pulse the RXD pin will be connected to the FSK demodulator output. So to use the Data Retiming function, the CLK input should be kept low until the RDY output goes low; if the Data Retiming function is not required the CLK input should be kept high at all times.
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Bell 202 Compatible Modem
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MX614 PRELIMINARY INFORMATION
The only restrictions on the timing of the CLK waveform are those shown in Figure 7 and the need to complete the transfer of all nine bits into the C within the time of a complete character at 1200bps. See Section 6.2 for Timing specifications.
FSK Demod output :
9 Bits of data
START 1 2
Received Character 'n' 3 4 5 6 7 8 9 STOP
RDY output : RXCK input : RXD output :
1 9
Retimed data bits from received character 'n'
RDY
tD tcLO tcHI
RXCK
tD tD
Data Bit 1 Data Bit 2
RXD
tD = Internal MX614 delay, tcHI = CLK high time, tcLO = CLK low time
Figure 7: FSK Operation with Rx Data Retiming Note that, if enabled, the Data Retiming block may interpret speech or other signals as random characters. If the Data Retiming facility is not required, the CLK input to the MX614 should be kept high at all times. The asynchronous data from the FSK Demodulator will then be connected directly to the RXD output pin, and the RDY output will not be activated by the FSK signal. This case is illustrated by the example in Figure 8.
Received Character 'n'
FSK Demod output : RXD output :
START START
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
STOP STOP
Figure 8: FSK Operation without Rx Data Retiming (CLK always high)
4.9 Tx Data Retiming
The Data Retiming block, when enabled in 1200bps transmit mode, requires the controlling C to load one bit at a time into the device by a pulse applied to the CLK input. The timing of this pulse is not critical and it may easily be generated by a simple software loop. This facility removes the need for a UART in the C without incurring an excessive software overhead. Note: Tx Data Retiming is not supported for data rates exceeding 1212bps. The Tx re-timing circuit consists of two 1-bit registers in series, the input of the first is connected to the TXD pin and the output of the second feeds the FSK modulator. The second register is clocked by an internally generated 1200Hz signal and when this occurs the CLK input is sampled. If the CLK input is high the TXD pin directly controls the FSK modulator, if the CLK input is low the FSK modulator is controlled by the output of the second register and the RDY pin is pulled low. The RDY output is reset by a high level on the CLK input pin. A low to high change on the CLK input pin will latch the data from the TXD input pin into the first register ready for transfer to the second register when the internal 1200Hz signal next occurs. So to use the retiming option the CLK input should be held low until the RDY output is pulled low. When the RDY pin goes low the next data bit should be applied at the TXD input and the CLK input pulled high and then low within the time limits set out in Figure 9. See Section 6.2 for Timing specifications.
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MX614 PRELIMINARY INFORMATION
FSK Modulator input : RDY output : CLK input : TXD input :
1
1
2
3
tR
2 3 4
RDY
tD tcHI
CLK
tS tH 1
TXD
tD = Internal MX614 delay, tR = RDY low to CLK going low, tS = data set up time tcHI= CLK high time, tH = data hold time
Figure 9: FSK Operation with Tx Data Retiming To ensure synchronization between the controlling device and the MX614 when entering Tx retiming mode the TXD pin must be held at a constant logic level from when the CLK pin is first pulled low to the end of loading in the second retimed bit. Similarly when exiting Tx retiming mode the TXD pin should be held at the same logic level as the last retimed bit for at least 2 bit times after the CLK line is pulled high. If the data retiming facility is not required, the CLK input to the MX614 should be kept high at all times. The asynchronous data to the FSK modulator will then be connected directly to the TXD input pin. This is illustrated in Figure 10 and will also be the case when transmitting 5bps or 150bps data which has no retime option.
TXD input : FSK Modulator input :
N-2 N-2
N-1 N-1
N N
N+1 N+1
N+2 N+2
Figure 10: FSK Operation without Tx Data Retiming (CLK always high)
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MX614 PRELIMINARY INFORMATION
5. Application
5.1 Line Interface
The signals on the telephone line are not suitable for direct connection to the MX614. A Line Interface circuit is required to: * * * * Provide high voltage and dc isolation Attenuate the Tx signal present at the Rx input Provide the low impedance drive necessary for the line Filter the Tx and Rx signals
C5
LINE
C R2
A1 RXIN
1:1
0V
B
A2
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+
Z C6 R4 R5 C7 R6 R3 A
TXOUT VBIAS RXAMPOUT
R7
R2 R3 R4-R7 C5 C6 C7
See Notes See Notes 100k 22F 100pF 330pF
1%, 1%, 1%, 20% 10% 10%
Figure 11: Line Interface Circuit
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Bell 202 Compatible Modem
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MX614 PRELIMINARY INFORMATION
Line Interface Notes: 1. The components 'Z' between points B and C should match the line impedance. 2. Device A2 must be able to drive 'Z' and the line. 3. R2: For optimum results R2 should be set so that the gain is VDD/5.0, i.e. R2 = 100k at VDD = 5.0V, rising to 150k at VDD = 3.3V. 4. R3: The levels in dB (relative to a 775mVRMS signal) at 'A', 'B' and 'C' in the line interface circuit are: Level at " " Example: VDD 3.3V 5.0V 'A' -3.6dB 0dB R3 100k 150k 'B' -3.6dB -3.5dB 'C' -9.6dB -9.5dB 'A' = 20Log(VDD/5) 'B' = 'A' + 20Log(100k/R3) 'C' = 'B' - 6
6. Performance Specification
6.1 Electrical Performance
Absolute Maximum Ratings Exceeding these maximum ratings can result in damage to the device. General Supply (VDD - VSS) Voltage on any pin to VSS Current into or out of and pins VDD VSS Any other pins DW / PDIP Packages Total Allowable Power Dissipation at TAMB = 25C Derating above 25C Storage Temperature Operating Temperature Operating Limits Correct operation of the device outside these limits is not implied. Notes Supply (VDD - VSS) Operating Temperature Xtal Frequency Operating Limits Notes: 1. A crystal frequency of 3.579545MHz 0.1% is required for correct FSK operation. 1 Min. 3.0 -40 3.575965 Max. 5.5 85 3.583125 Units V C MHz -55 -40 800 13 125 85 mW mW/C above 25C C C -30 -30 -20 30 30 20 mA mA mA Min. -0.3 -0.3 Max. 7.0 VDD + 0.3 Units V V
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MX614 PRELIMINARY INFORMATION
Operating Characteristics For the following conditions unless otherwise specified: VDD = 3.3V at TAMB = 25C Xtal Frequency = 3.579545MHz 0.1% 0dBV corresponds to 1.0VRMS Tx and Rx data rates = 1200bps. Notes DC Parameters IDD (M0 = '1', M1 = '1') IDD (M0 or M1 = '0') at VDD = 3.0V IDD (M0 or M1 = '0') at VDD = 5.0V Logic '1' Input Level Logic '0' Input Level Logic Input Leakage Current (VIN = 0 to VDD), Excluding XTAL/CLOCK Input Output Logic '1' Level (lOH = 360A) Output Logic '0' Level (lOL= 360A) RDY Output 'off' State Current (VOUT = VDD) FSK Demodulator Bit Rate Mark (Logical '1') Frequency Space (Logical '0') Frequency Valid Input Level Range Maximum Twist (Mark Level wrt Space Level) Acceptable Signal to Noise Ratio Level Detector 'On' Threshold Level Level Detector 'Off' to 'On' Time (Figure 4 TeON) Level Detector 'On' to 'Off' Time (Figure 4 TeOFF) FSK Retiming Acceptable Rx Data Rate Tx Data Rate FSK Modulator TXOUT Level Driving 40k load Twist (Mark Level wrt Space Level) Tx 1200bps (M1 = '0', M0 = '1'). Bit Rate Mark (Logical '1') Frequency Space (Logical '0') Frequency Tx 150bps (M1 = '0', M0 = '0'). Bit Rate Mark (Logical '1') Frequency Space (Logical '0') Frequency Tx 5bps (M1 = '1', M0 = '0'). Bit Rate Mark (Logical '1') Frequency
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Min.
Typ. 1.0 1.0 1.7
Max.
Units A
1, 2 1 1 70%
1.25 2.5 30%
mA mA VDD VDD A V
-1.0 VDD -0.4
1.0
0.4 1.0 3 0 1188 2178 4, 5 6 4 8.0 1188 1194 7 -3.2 -2.0 3 0 1197 2196 0 385 485 0 385 5.0 150 -2.2 0 1200 1200 1212 1206 -1.2 2.0 1818 1203 2204 152 389 489 5.1 389 -40.0 6.0 20.0 -40.0 25.0 1200 1200 2200 1818 1212 2222 -8.0
V A Baud Hz Hz dBV dB dB dBV ms ms Baud Baud dBV dB Baud Hz Hz Baud Hz Hz Baud Hz
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MX614 PRELIMINARY INFORMATION
Notes Space (Logical '0') Frequency Input Amplifier Impedance (RXIN Pin) Voltage Gain XTAL/CLOCK Input 'High' Pulse Width 'Low' Pulse Width Operating Characteristics Notes: 10 10 9 9 8
Min.
Typ. 0
Max.
Units Hz M
10.0 500 100 100
V/V ns ns
1. Not including any current drawn from the MX614 pins by external circuitry other than X1, C1 and C2. 2. TXD, RXEQ and CLK inputs at VSS, M0 and M1 inputs at VDD. 3. Tested at 1200bps. 4. Measured at the Rx Input Amplifier output (pin RXAMPOUT) for 1200Hz and VDD= 5.0V. The internal threshold levels are proportional to VDD. To cater for other supply voltages or different signal level ranges the voltage gain of the Rx Input Amplifier should be adjusted by selecting the appropriate external components as described in section 5.1. 5. Best 1818bps performance is achieved when the minimum Input Level is _ -32dBV. 6. Flat noise in 200 - 3200Hz band. 7. At VDD= 5.0V. (-2.2dBV is equivalent to 0dBm ref. 775mVRMS into 600.) 8. TXOUT held at approximately VDD/2. 9. Open loop, small signal low frequency measurements. 10. Timing for an external input to the XTAL/CLOCK pin.
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MX614 PRELIMINARY INFORMATION
6.2 Timing
Data and Mode Timing Rx Data Delay (RXIN to RXD) Tx Delay Data (TXD to TXOUT) Mode change delay ZP to Tx or Rx Mode change delay Tx1200 to Rx1200 Mode change delay Rx1200 to Tx1200 tD = Internal MX614 delay tcHI = CLK High time tcLO = CLK low time tR = RDY low to CLK going low tS = Data Set-up time tH = Data Hold time Timing Notes 1. When data retiming is not enabled. 2. Delay from mode change to reliable data at TXOUT or RXD pins. 3. Reference Figure 7. 4. Reference Figure 9. 5. Reference Figure 12. 6. Reference Figure 13. Notes 1, 5 1, 6 2 2 2 3, 4 3, 4 3 4 4 4 1 1 1 1 800 Min. Typ. 2.55 0.1 20 4.0 0.2 1 Max. Units ms ms ms ms ms s s s s s s
RXIN (FSK Signal) Rx Data Delay RXD
Note: M0 and M1 are preset and stable. Figure 12: RXIN to RXD Delay time
Valid 1 or 0
FLO TXOUT (FSK Signal) TXD
FHI
FLO
FHI
Tx Data Delay
Note: M0 and M1 are preset and stable. FLO and FHI are the two FSK signaling frequencies. Figure 13: TXD to TXOUT Delay time
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MX614 PRELIMINARY INFORMATION
6.3 Packaging
Package Tolerances
A Z B E W L PIN 1 X Y C H J P K T
DIM. A B C E H J K L P T W X Y Z MIN. TYP. MAX.
0.413 (10.49) 0.395 (10.03) 0.299 (7.59) 0.286 (7.26) 0.093 (2.36) 0.105 (2.67) 0.419 (10.64) 0.390 (9.90) 0.003 (0.08) 0.020 (0.51) 0.013 (0.33) 0.020 (0.51) 0.041 (1.04) 0.016 (0.41) 0.050 (1.27) 0.050 (1.27) 0.009 (0.23) 0.0125 (0.32) 45 0 10 5 7 5
ALTERNATIVE PIN LOCATION MARKING
NOTE : All dimensions in inches (mm.) Angles are in degrees
Figure 14: 16-pin SOIC Mechanical Outline: Order as part no. MX614DW
A
Package Tolerances
DIM. A B C E E1 H J J1 K L P T Y MIN. TYP . MAX.
0.810 (20.57) 0.740 (18.80) 0.262 (6.63) 0.240 (6.10) 0.135 (3.43) 0.200 (5.06) 0.390 (9.91). 0.300 (7.62) 0.290 (7.37) 0.325 (8.26) 0.015 (0.38) 0.070 (1.77) 0.014 (0.35) 0.023 (0.58) 0.040 (1.02) 0.065 (1.65) 0.056 (1.42) 0.064 (1.63) 0.121 (3.07) 0.150 (3.81) 0.100 (2.54) 0.008 (0.20) 0.015 (0.38) 7
B
E1 Y
E
PIN 1
T
K H L J J1 P
C
NOTE : All dimensions in inches (mm.) Angles are in degrees
Figure 15: 16-pin PDIP Mechanical Outline: Order as part no. MX614P
2000 MX-COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480162.004
4800 Bethania Station Road, Winston-Salem, NC 27105 USA
All Trademarks and Service Marks are held by their respective companies.
Bell 202 Compatible Modem
18
MX614 PRELIMINARY INFORMATION
A
A B C E H J L P T Y
Package Tolerances
DIM. MIN. TYP. MAX.
ALTERNATIVE PIN LOCATION MARKING
B
E L
PIN 1 Y C H J P
T
0.311 (7.90) 0.303 (7.70) 0.169 (4.30) 0.177 (4.50) ---------0.047 (1.20) 0.248 (6.30) 0.256 (6.50) 0.002 (0.05) 0.006 (0.15) 0.007 (0.17) 0.012 (0.30) 0.020 (0.50) 0.030 (0.75) 0.0256 (0.65) 0.003 (0.08) 0.008 (0.20) 0 8
NOTE : All dimensions in inches (mm.) Angles are in degrees
Figure 16 : 24-pin TSSOP Mechanical Outline: Order as part no. MX614TN
2000 MX-COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480162.004
4800 Bethania Station Road, Winston-Salem, NC 27105 USA
All Trademarks and Service Marks are held by their respective companies.
CML Microcircuits
COMMUNICATION SEMICONDUCTORS
CML Product Data
In the process of creating a more global image, the three standard product semiconductor companies of CML Microsystems Plc (Consumer Microcircuits Limited (UK), MX-COM, Inc (USA) and CML Microcircuits (Singapore) Pte Ltd) have undergone name changes and, whilst maintaining their separate new names (CML Microcircuits (UK) Ltd, CML Microcircuits (USA) Inc and CML Microcircuits (Singapore) Pte Ltd), now operate under the single title CML Microcircuits. These companies are all 100% owned operating companies of the CML Microsystems Plc Group and these changes are purely changes of name and do not change any underlying legal entities and hence will have no effect on any agreements or contacts currently in force. CML Microcircuits Product Prefix Codes Until the latter part of 1996, the differentiator between products manufactured and sold from MXCOM, Inc. and Consumer Microcircuits Limited were denoted by the prefixes MX and FX respectively. These products use the same silicon etc. and today still carry the same prefixes. In the latter part of 1996, both companies adopted the common prefix: CMX. This notification is relevant product information to which it is attached. CML Microcircuits (USA) [formerly MX-COM, Inc.] Product Textual Marking On CML Microcircuits (USA) products, the `MX-COM' textual logo is being replaced by a `CML' textual logo.
Company contact information is as below:
CML Microcircuits (UK)Ltd
COMMUNICATION SEMICONDUCTORS
CML Microcircuits (USA) Inc.
COMMUNICATION SEMICONDUCTORS
CML Microcircuits (Singapore)PteLtd
COMMUNICATION SEMICONDUCTORS
Oval Park, Langford, Maldon, Essex, CM9 6WG, England Tel: +44 (0)1621 875500 Fax: +44 (0)1621 875600 uk.sales@cmlmicro.com www.cmlmicro.com
4800 Bethania Station Road, Winston-Salem, NC 27105, USA Tel: +1 336 744 5050, 0800 638 5577 Fax: +1 336 744 5054 us.sales@cmlmicro.com www.cmlmicro.com
No 2 Kallang Pudding Road, 09-05/ 06 Mactech Industrial Building, Singapore 349307 Tel: +65 7450426 Fax: +65 7452917 sg.sales@cmlmicro.com www.cmlmicro.com
D/CML (D)/2 May 2002

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