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SP431
SIGNAL PROCESSING EXCELLENCE
High Speed, +3.3V Quad RS-422 Differential Line Driver
s Compatible with the EIA standard for RS-422 serial protocol s Quad Differential Line Drivers s Tri-state Output Control s At Least 60Mbps Transmission Rates s 6.0ns Typical Driver Propagation Delays s Less than 1ns Typical Output Skew s Single +3.3V Supply Operation s Common Driver Enable Control s Compatibility with the industry standard 26LV31
DESCRIPTION The SP431 is a quad differential line driver that meets the specifications of the EIA standard RS-422 serial protocol. The SP431 features Sipex's BiCMOS process allowing low power operational characteristics of CMOS technology while meeting all of the demands of the RS-422 serial protocol over 60Mbps under load. The RS-422 protocol allows up to 10 receivers to be connected to a multipoint bus transmission line. The SP431 features a driver enable control common to all four drivers and a tri-state output. Since the cabling can be as long as 4,000 feet, the RS-422 drivers of the SP431 are equipped with a wide common-mode output voltage range to accomodate ground potential differences.
DI1 D01A D01B ENABLE D02B D02A DI2 GND
1 2 3 4 5 6 7 8
16 VCC
VCC DI4
INPUTS DI3 DI2 DI1
SP431
15 DI4 14 D04A 13 D04B 12 ENABLE 11 D0 B 3 10 D0 A 3 9 DI 3
ENABLE ENABLE
DO A DO B DO A DO B DO A DO B DO A DO B 3 4 3 2 2 1 1 4
GND
OUTPUTS
SP431DS/08
SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver
(c) Copyright 1997 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability and cause permanent damage to the device. VCC........................................................................................0.5V to 7.0V VIN (DC Input Voltage).............................................-1.5V to (VCC + 1.5V) VOUT (DC Output Voltage)......................................................-0.5V to 7V IIK, IOK (Clamp Diode Current)........................................................20mA IOUT (DC Output Current, per pin)................................................150mA ICC (DC VCC or GND Current, per pin)..........................................150mA TSTG (Storage Temperature Range)...............................-65C to +150C Storage Temperature....................................................-65C to +150C Power Dissipation Per Package 16-pin PDIP (derate 14.3mW/oC above +70oC).........................1150mW 16-pin NSOIC (derate 13.6mW/oC above +70oC)......................1100mW
VCC DI4
INPUTS DI3 DI2 DI1
ENABLE ENABLE
DO A DO B DO A DO B DO A DO B DO A DO B 3 4 3 2 2 1 1 4
GND
Figure 1. SP431 Block Diagram
OUTPUTS
SP431DS/08
SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver
(c) Copyright 1997 Sipex Corporation
2
SPECIFICATIONS
Unless otherwise noted, the following specifications apply for VCC = +3.0V to +3.6V with Tamb = 25C and all MIN and MAX limits apply across the recommended operating temperature range.
DC PARAMETERS Supply Voltage, VCC DC Input or Output Voltage, VIN or VOUT Input Electrical Characteristics Input Rise or Fall Times, tr or tf HIGH Level Input Voltage, VIH LOW Level Input Voltage, VIL Output Electrical Characteristics HIGH Level Output Voltage, VOH LOW Level Output Voltage, VOL Differential Output Voltage, VT Difference in Differential Output, |VT| - |VT| Common Mode Output Voltage, VOS Difference in Common Mode Output, |VOS -VOS| Quiescent Supply Current ICC Tri-state Output Leakage Current, IOZ 2.0 100 A A VIN = VCC or GND, Note 2 VOUT = VCC or GND, ENABLE = VIL, ENABLE = VIH VIN = VCC or GND, Notes 1 and 3 VCC = 0V, VOUT = 6V, Note 1 VCC = 0V, VOUT = -0.25V, Note 1 2.0 2.5 2.9 0.2 2.7 0.4 3.0 0.4 0.5 V V V V V V VIN = VIH or VIL, IOUT = -20mA VIN = VIH or VIL, IOUT = 20mA RL = 100, Note 1 RL = 100, Note 1 RL = 100, Note 1 RL = 100, Note 1 2.0 0.8 3 ns V V MIN. TYP. MAX. 3.0 3.6 VCC UNITS V V CONDITIONS
Output Short Circuit Current, ISC Output Leakage Current Power Off IOFF IOFF
-30
-150
mA A A
100 -100
NOTE 1: Refer to EIA specifications for RS-422 serial protocol for exact test conditions. NOTE 2: Measured per input. All other inputs at VCC or GND. NOTE 3: This is the current sourced when a high output is shorted to GND. Only one output at a time should be shorted.
SP431DS/08
SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver
(c) Copyright 1997 Sipex Corporation
3
SPECIFICATIONS (continued)
Unless otherwise noted, the following specifications apply for VCC = +3.0V to +3.6V, Tamb = 25C, tr < 6ns, tf < 6ns, and all MIN and MAX limits apply across the recommended operating temperature range.
PARAMETERS SWITCHING CHARACTERISTICS Propagation Delays, tPLHD, tPHLD Skew Differential Ouput Rise and Fall Times, tTLH, tPHL Output Enable Time, tPZH Output Enable Time, tPZL Output Disable Time, tPHZ Output Disable Time, tPLZ Power dissipation Capacitance, CPD Input Capacitance, CIN 5 0.5 3 13 8 8 6 50 6 ns ns ns ns ns ns ns pF pF Figure 3 Figure 3, Note 4 Figure 3 Figure 5 Figure 5 Figure 5, Note 5 Figure 5, Note 5 Note 6 MIN. TYP. MAX. UNITS CONDITIONS
NOTE 4: Skew is defined as the difference in propagation delays between complementary outputs at the 50% input. NOTE 5: Output disable time is the delay from ENABLE or ENABLE being switched to the output transistors turning off. The actual disable times are less than indicated due to the delay added by the RC time constant of the load. NOTE 6: CPD determines the no load dynamic power consumption, PD = (CPDVCC2 f) + (ICCVCC), and the no load dynamic current consumption, IS = (CPDVCCf) + ICC.
SP431DS/08
SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver
(c) Copyright 1997 Sipex Corporation
4
AC TEST CIRCUITS AND SWITCHING TIME WAVEFORMS
f=1 MHz tR < 10ns, tF < 10ns 3V DRIVER INPUT DIX 1.5V tPLHD DRIVER D0XB 1.5V tPHLD 0V (Differential) DRIVER D0XA 80% DIFFERENTIAL OUTPUT 20% tTLH 0V VDIFF = VA - VB tTHL 80% 0V 20% 0V VOL GND VOH
CL Generator Driver Enabled DIX 50 D CL CL RL D0XA D0XB
Figure 2. AC Test Circuit
Figure 3. Propagation Delays
ENABLE
3V
VCC
D0XA S1 S2
Test Point S3 110
1.5V ENABLE
1.5V
0V
VCC
D0XB ENABLE ENABLE If ENABLE is the input, then ENABLE = HIGH If ENABLE is the input, then ENABLE = LOW
CL
Input = ENABLE or ENABLE S1= VCC S2 = D0XB S3 = GND and/or S1 = GND tPLZ S2 = D0XA S3 = GND Input = ENABLE or ENABLE S1= GND S2 = D0XB S3 = VCC and/or S1 = VCC S2 = D0XA S3 = VCC
tPHZ VOH = 0.3V
tPZH VOH 1.3V GND
tPZL VCC VOL+ 0.3V 1.3V VOL
Figure 4. Driver Single-Ended TRI-STATE Test Circuit
Figure 5. Driver Single-Ended TRI-STATE Waveforms
3.0V INPUT 0.0V OUTPUT (DIFFERENTIAL) 90% 10% tTLH Input pulse: f = 1MHz, 50% tr < 6ns tf < 6ns tTHL 90% 10%
Figure 6. Differential Rise and Fall Times
SP431DS/08 SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver (c) Copyright 1997 Sipex Corporation
5
DESCRIPTION The SP431 is a low-power quad differential line driver designed for digital data transmission meeting the specifications of the EIA standard RS-422 serial protocol. The SP431 features Sipex's BiCMOS process allowing low power operational characteristics of CMOS technology while meeting all of the demands of the RS-422 serial protocol up to 60Mbps under load in harsh environments. The RS-422 standard is ideal for multi-drop applications and for long-distance communication. The RS-422 protocol allows up to 10 drivers to be connected to a data bus, making it an ideal choice for multi-drop applications. Since the cabling can be as long as 4,000 feet, RS-422 drivers are equipped with a wide common mode output range to accommodate ground potential differences. Because the RS-422 is a differential interface, data is virtually immune to noise in the transmission line. The SP431 accepts TTL or CMOS input levels and translates these to RS-422 output levels. The SP431 features active HIGH and active LOW driver enable controls common to all four driver channels see Figure 8. A logic HIGH on the ENABLE pin (pin 4) or a logic LOW on the ENABLE pin (pin 12) will enable the differential driver outputs. A logic LOW on the ENABLE pin (pin 4) or a logic HIGH on the ENABLE pin (pin 12) will tri-state the driver outputs. The RS-422 line driver outputs feature high source and sink current capability. All drivers are internally protected against short circuits on their outputs. The driver outputs are short-circuit limited to 150mA. The driver output skew times are typically 0.5ns. To minimize reflections, the multipoint bus transmission line should be terminated at both ends in its characteristic impedance, and stub lengths off the main line should be kept as short as possible.
ENABLE
ENABLE DATA OUTPUT
DATA
*RT
*RT is optional although highly recommended to reduce reflection.
Figure 7. Two-Wire Balanced System, RS-422
NonInverting Output tri-state LOW HIGH
ENABLE
ENABLE
Input
Inverting Output tri-state HIGH LOW
LOW HIGH don't care
HIGH don't care LOW
don't care LOW HIGH
Figure 8. Truth Table, Enable / Disable Function Common to All Four RS-422 Drivers
SP431DS/08
SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver
(c) Copyright 1997 Sipex Corporation
6
DI1 D01A D01B ENABLE D02B D02A DI2 GND
1 2 3 4 5 6 7 8
16 VCC
SP431
15 DI4 14 D04A 13 D04B 12 ENABLE 11 D0 B 3 10 D0 A 3 9 DI 3
PINOUT
PIN ASSIGNMENTS Pin 1 -- DI1 -- Driver 1 TTL input. Pin 2 -- D01A -- Non-inverted driver output. Pin 3 -- D01B -- Inverted driver output. Pin 4 -- ENABLE -- Driver output enable, active HIGH. Pin 5 -- D02B -- Inverted driver output. Pin 6 -- D02A -- Non-inverted driver output. Pin 7 -- DI2 -- Driver 2 TTL input. Pin 8 -- GND -- Ground. Pin 9 -- DI3 -- Driver 3 TTL input. Pin 10 -- D03A -- Non-inverted driver output. Pin 11 -- D03B -- Inverted driver output. Pin 12 -- ENABLE -- Driver output enable, active LOW. Pin 13 -- D04B -- Inverted driver output. Pin 14 -- D04A -- Non-inverted driver output. Pin 15 -- DI4 -- Driver 4 TTL input. Pin 16 -- VCC -- +3.0V to +3.6V power supply.
SP431DS/08
SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver
(c) Copyright 1997 Sipex Corporation
7
TYPICAL PERFORMANCE CHARACTERISTICS
TBD
Figure 9. Differential Propagation Delay Vs. Temperature
TBD
Figure 10. Differential Propagation Delay Vs. Temperature
TBD
TBD
Figure 11. Differential Skew Vs. Temperature
Figure 12. Differential Skew Vs. Power Supply Voltage
SP431DS/08
SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver
(c) Copyright 1997 Sipex Corporation
8
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
TBD
Figure 13. Differential Transition Time Vs. Temperature
TBD
Figure 14. Differential Transition Time Vs. Power Supply Voltage
TBD
TBD
Figure 15. Complementary Skew Vs. Temperature
Figure 16. Complementary Skew Vs. Power Supply Voltage
SP431DS/08
SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver
(c) Copyright 1997 Sipex Corporation
9
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
TBD
Figure 17. Differential Output Voltage Vs. Output Current
TBD
Figure 18. Differential Output Voltage Vs. Output Current
TBD
TBD
Figure 19. Output High Voltage Vs. Output High Current
Figure 20. Output High Voltage Vs. Output High Current
SP431DS/08
SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver
(c) Copyright 1997 Sipex Corporation
10
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
TBD
Figure 21. Output Low Voltage Vs. Output Low Current
TBD
Figure 22. Output Low Voltage Vs. Output Low Current
TBD
Figure 23. Supply Current Vs. Temperature
TBD
Figure 24. Supply Current Vs. Power Supply Voltage
SP431DS/08
SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver
(c) Copyright 1997 Sipex Corporation
11
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
TBD
Figure 25. No Load Supply Current Vs. Data Rate
TBD
Figure 26. Loaded Supply Current Vs. Data Rate
TBD
Figure 27. Output Short Circuit Current Vs. Temperature
TBD
Figure 28. Output Short Circuit Current Vs. Power Supply Voltage
SP431DS/08
SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver
(c) Copyright 1997 Sipex Corporation
12
PACKAGE: PLASTIC DUAL-IN-LINE (NARROW)
E1 E
D1 = 0.005" min. (0.127 min.) D
A1 = 0.015" min. (0.381min.) A = 0.210" max. (5.334 max). A2 C O eA = 0.300 BSC (7.620 BSC) L
e = 0.100 BSC (2.540 BSC)
B1 B
ALTERNATE END PINS (BOTH ENDS)
DIMENSIONS (Inches) Minimum/Maximum (mm) A2 B B1 C D E E1 L O
16-PIN 0.115/0.195 (2.921/4.953) 0.014/0.022 (0.356/0.559) 0.045/0.070 (1.143/1.778) 0.008/0.014 (0.203/0.356) 0.780/0.800 (19.812/20.320) 0.300/0.325 (7.620/8.255) 0.240/0.280 (6.096/7.112) 0.115/0.150 (2.921/3.810) 0/ 15 (0/15)
SP431DS/08
SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver
(c) Copyright 1997 Sipex Corporation
13
PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (NARROW)
E
H
h x 45 D A O e B A1 L
DIMENSIONS (Inches) Minimum/Maximum (mm) A A1 B D E e H h L O
16-PIN 0.053/0.069 (1.346/1.748) 0.004/0.010 (0.102/0.249) 0.013/0.020 (0.330/0.508) 0.386/0.394 (9.802/10.000) 0.150/0.157 (3.802/3.988) 0.050 BSC (1.270 BSC) 0.228/0.244 (5.801/6.198) 0.010/0.020 (0.254/0.498) 0.016/0.050 (0.406/1.270) 0/8 (0/8)
SP431DS/08
SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver
(c) Copyright 1997 Sipex Corporation
14
ORDERING INFORMATION
Model .................................................................................... Temperature Range ..................................................................................... Package SP431CP ..................................................................................... 0C to +70C ........................................................................... 16-pin Plastic DIP SP431CN ..................................................................................... 0C to +70C .......................................................................... 16-pinNarrow SOIC Please consult the factory for pricing and availability on a Tape-On-Reel option.
Corporation
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation Headquarters and Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 European Sales Offices: ENGLAND: Sipex Corporation 2 Linden House Turk Street Alton Hampshire GU34 IAN England TEL: 44-1420-549527 FAX: 44-1420-542700 e-mail: mikeb@sipex.co.uk Far East: JAPAN: Nippon Sipex Corporation Yahagi No. 2 Building 3-5-3 Uchikanda, Chiyoda-ku Tokyo 101 TEL: 81.3.3256.0577 FAX: 81.3.3256.0621
GERMANY: Sipex GmbH Gautinger Strasse 10 82319 Starnberg TEL: 49.81.51.89810 FAX: 49.81.51.29598 e-mail: sipex-starnberg@t-online.de
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others.
SP431DS/08
SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver
(c) Copyright 1997 Sipex Corporation
15

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