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| (R) SP488/489 Quad RS-485/RS-422 Line Receivers s s s s s s s s RS-485 or RS-422 Applications Quad Differential Line Receivers Tri-state Output Control 120ns Typical Receiver Propagation Delays -7V to +12V Common Mode Input Range 1mA Supply Current Single +5V Supply Operation Pin Compatible with SN75173, SN75175, LTC488 and LTC489 DESCRIPTION... The SP488 and SP489 are low-power quad differential line receivers meeting RS-485 and RS-422 standards. The SP488 features a common receiver enable control; the SP489 provides independent receiver enable controls for each pair of receivers. Both feature tri-state outputs and wide common- mode input range. The receivers have a fail-safe feature which forces a logic "1" output when receiver inputs are left floating. Both are available in 16-pin plastic DIP and SOIC packages. RI1B RI1A RO1 EN RO2 RI2A RI2B GND 1 2 3 4 5 6 7 8 SP488 1 4 16 15 14 13 12 VCC RI4B RI4A RO4 EN RO3 RI3A RI3B RI1B RI1A RO1 EN1/EN2 RO2 RI2A RI2B GND 1 2 3 4 5 6 7 8 SP489 1 4 16 15 14 13 12 VCC RI4B RI4A RO4 EN3/EN4 RO3 RI3A RI3B 2 3 11 10 9 2 3 11 10 9 SP488/489 Quad RS-485/RS-422 Line Receivers (c) Copyright 2000 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these 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. VCC ............................................................................................ +7V Input Voltages Logic ............................................................. -0.5V to (VCC +0.5V) Receiver ............................................................................... 14V Receiver Output Voltage ................................. -0.5V to (VCC +0.5V) Input Currents Logic .................................................................................. 25mA Storage Temperature ............................................ -65C to +150C Power Dissipation Plastic DIP ........................................................................ 375mW (derate 7mW/C above +70C) Small Outline .................................................................... 375mW (derate 7mW/C above +70C) Lead Temperature (soldering, 10 sec) ................................... 300C SPECIFICATIONS VCC = 5V5%; typicals at 25C; TMIN TA TMAX unless otherwise noted. PARAMETER DC CHARACTERISTICS Digital Inputs Voltage VIL VIH Input Current RECEIVER INPUTS Input Resistance Differential Input Threshold Input Current (A, B) MIN. TYP. MAX. UNIT CONDITIONS EN, EN, EN1/EN2, EN3/EN4 0.8 2.0 2 Volts Volts A 0V VIN VCC 12 -0.2 +0.2 +1.0 -0.8 kOhm Volts mA mA Mbps Maximum Data Rate 10 RECEIVER OUTPUTS Output Voltage VOH 3.5 VOL 0.4 High Impedance Output Current 1 POWER REQUIREMENTS Supply Voltage 4.75 5.00 5.25 Supply Current 1 5 ENVIRONMENTAL AND MECHANICAL Operating Temperature -C 0 +70 -E -40 +85 Storage Temperature -65 +150 Package -_S 16-pin Plastic DIP -_T 16-pin SOIC -7V VCM 12V -7V VCM 12V VCC = 0V or 5.25V; IIN2 VIN = +12V VIN = -7V V V A Volts mA VCC = maximum; 0.4V VO 2.4V IO = -4mA; VID = +0.2V IO = +4mA; VID = -0.2V No load C C C SP488/489 Quad RS-485/RS-422 Line Receivers (c) Copyright 2000 Sipex Corporation 2 100pF EN A DI DRIVER B 54 RCVR ROn CL 100pF EN 1/4 SP486 1/4 SP488 S1 RCVR CL 1k S2 1k VCC Figure 1. Timing Test Circuit Figure 2. Enable/Disable Timing Test Circuit SP488 PINOUT Pin 1 -- RI1B -- Receiver 1 input B. Pin 2 -- RI1A -- Receiver 1 input A. Pin 3 -- RO1 -- Receiver 1 Output -- If Receiver 1 output is enabled, if RI1A > RI1B by 200mV, Receiver output is high. If Receiver 1 output is enabled, and if RI1A < RI1B by 200mV, Receiver 1 output is low. Pin 4 -- EN -- Receiver Output Enable. Please refer to SP488 Truth Table (1). Pin 5 -- RO2 -- Receiver 2 Output -- If Receiver 2 output is enabled, if RI2A > RI2B by 200mV, Receiver 2 output is high. If Receiver 2 output is enabled, and if RI2A < RI2B by 200mV, Receiver 2 output is low. PINOUT Pin 6 -- RI2A -- Receiver 2 input A. Pin 7 -- RI2B -- Receiver 2 input B. Pin 8 -- GND -- Digital Ground. Pin 9 -- RI3B -- Receiver 3 input B. Pin 10 -- RI3A -- Receiver 3 input A. Pin 11 -- RO3 -- Receiver 3 Output -- If Receiver 3 output is enabled, if RI3A > RI3B by 200mV, Receiver 3 output is high. If Receiver 3 output is enabled, and if RI3A < RI3B by 200mV, Receiver 3 output is low. Pin 12 -- EN -- Receiver Output Enable. Please refer to SP488 Truth Table (1). RI1B RI1A RO1 EN RO2 RI2A RI2B GND 1 2 3 4 5 6 7 8 SP488 1 4 16 15 14 13 12 VCC RI4B RI4A RO4 EN RO3 RI3A RI3B RI1B RI1A RO1 EN1/EN2 RO2 RI2A RI2B GND 1 2 3 4 5 6 7 8 SP489 1 4 16 15 14 13 12 VCC RI4B RI4A RO4 EN3/EN4 RO3 RI3A RI3B 2 3 11 10 9 2 3 11 10 9 SP488/489 Quad RS-485/RS-422 Line Receivers (c) Copyright 2000 Sipex Corporation 3 Pin 13 -- RO4 -- Receiver 4 Output -- If Receiver 4 output is enabled, if RI4A > RI4B by 200mV, Receiver 4 output is high. If Receiver 4 output is enabled, and if RI4A < RI4B by 200mV, Receiver 4 output is low. Pin 14 -- RI4A -- Receiver 4 input A. Pin 15 -- RI4B -- Receiver 4 input B. Pin 16 -- Supply Voltage VCC -- 4.75V VCC 5.25V. SP489 PINOUT Pin 1 -- RI1B -- Receiver 1 input B. Pin 2 -- RI1A -- Receiver 1 input A. Pin 3 -- RO1 -- Receiver 1 Output -- If Receiver 1 output is enabled, if RI1A > RI1B by 200mV, Receiver output is high. If Receiver 1 output is enabled, and if RI1A < RI1B by 200mV, Receiver 1 output is low. Pin 4 -- EN1/EN2 -- Receiver 1 and 2 Output Enable. Please refer to SP489 Truth Table (2). Pin 5 -- RO2 -- Receiver 2 Output -- If Receiver 2 output is enabled, if RI2A > RI2B by 200mV, Receiver 2 output is high. If Receiver 2 output is enabled, and if RI2A < RI2B by 200mV, Receiver 2 output is low. Pin 6 -- RI2A -- Receiver 2 input A. Pin 7 -- RI2B -- Receiver 2 input B. Pin 8 -- GND -- Digital Ground. Pin 9 -- RI3B -- Receiver 3 input B. Pin 10 -- RI3A -- Receiver 3 input A. Pin 11 -- RO3 -- Receiver 3 Output -- If Receiver 3 output is enabled, if RI3A > RI3B by 200mV, Receiver 3 output is high. If Receiver 3 output is enabled, and if RI3A < RI3B by 200mV, Receiver 3 output is low. Pin 12 -- EN3/EN4 -- Receiver 3 and 4 Output Enable. Please refer to SP489 Truth Table (2). Pin 13 -- RO4 -- Receiver 4 Output -- If Receiver 4 output is enabled, if RI4A > RI4B by 200mV, Receiver 4 output is high. If Receiver 4 output is enabled, and if RI4A < RI4B by 200mV, Receiver 4 output is low. Pin 14 -- RI4A -- Receiver 4 input A. Pin 15 -- RI4B -- Receiver 4 input B. Pin 16 -- Supply Voltage VCC -- 4.75V VCC 5.25V. FEATURES... The SP488 and SP489 are low-power quad differential line receivers meeting RS-485 and RS-422 standards. The SP488 features active high and active low common receiver enable controls; the SP489 provides independent, active high receiver enable controls for each pair of receivers. Both feature tri-state outputs and a -7V to +12V common-mode input range permitting a 7V ground difference between devices on the communications bus. The SP488/ 489 are equipped with a fail-safe feature which forces a logic high at the receiver output when the input is left floating. Data rates up to 10Mbps are supported. Both are available in 16-pin plastic DIP and SOIC packages. DIFFERENTIAL A-B VID 0.2V -0.2V < VID < +0.2V VID 0.2V X ENABLES EN1/EN2 or EN3/EN4 H H H L OUTPUT RO H X L Hi-Z DIFFERENTIAL A-B VID 0.2V -0.2V < VID < +0.2V VID 0.2V X EN H X H X H X L ENABLES EN X L X L X L H OUTPUT RO H H X X L L Hi-Z Table 1. SP488 Truth Table SP488/489 Table 2. SP489 Truth Table Quad RS-485/RS-422 Line Receivers (c) Copyright 2000 Sipex Corporation 4 AC PARAMETERS VCC = 5V5%; typicals at 25C; 0C TA +70C unless otherwise noted. PARAMETER MIN. PROPAGATION DELAY Receiver Input to Output Low to HIGH (tPLH) High to LOW (tPHL) Differential Receiver Skew (tSKD) Receiver Rise Time (tR) SP488 SP489 Receiver Fall Time (tF) SP488 SP489 RECEIVER ENABLE To Output HIGH To Output LOW RECEIVER DISABLE From Output LOW From Output HIGH TYP. MAX. UNIT CONDITIONS CL = 15pF; Figure 1, 3 120 120 13 30 30 20 20 70 80 250 250 70 70 40 40 150 200 ns ns ns ns ns 10% to 90% 90% to 10% ns ns ns ns CL = 15pF; Figures 2 and 4 (S2 closed) CL = 15pF; Figures 2 and 4 (S1 closed) CL = 15pF; Figures 2 and 4 (S1 closed) CL = 15pF; Figures 2 and 4 (S2 closed) 70 70 150 150 ns ns Input A-B +VOD -VOD tPHL F = 1MHZ: tr < 10ns: tf < 10ns 0V tPLH 0V RO VOH VOL 1.5V 1.5V Figure 3. Receiver Propagation Delays EN 3V 0V tZL F = 1MHZ: tr < 10ns: tf < 10ns 1.5V tLZ 1.5V RO 5V VOL tZH 1.5V Output normally low tHZ Output normally high 1.5V 0.5V RO VOH 0V 0.5V Figure 4. Receiver Enable/Disable Timing SP488/489 Quad RS-485/RS-422 Line Receivers (c) Copyright 2000 Sipex Corporation 5 ORDERING INFORMATION Quad RS485 Receivers: Model ........................ Enable/Disable ...................................... Temperature Range ........................ Package SP488CS .................. Common; active Low and Active High .. 0C to +70C .................... 16-pin Plastic DIP SP488CT .................. Common; active Low and Active High .. 0C to +70C ............................. 16-pin SOIC SP488ES .................. Common; active Low and Active High .. -40C to +85C ................ 16-pin Plastic DIP SP488ET .................. Common; active Low and Active High .. -40C to +85C ......................... 16-pin SOIC SP489CS .................. One per driver pair; active High ............ 0C to +70C .................... 16-pin Plastic DIP SP489CT .................. One per driver pair; active High ............ 0C to +70C ............................. 16-pin SOIC SP489ES .................. One per driver pair; active High ............ -40C to +85C ................ 16-pin Plastic DIP SP489ET .................. One per driver pair; active High ............ -40C to +85C ......................... 16-pin SOIC 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 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. SP488/489 Quad RS-485/RS-422 Line Receivers (c) Copyright 2000 Sipex Corporation 6 |
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