1

SP495

Quad Differential RS-485 Transceiver

© Copyright 2000 Sipex Corporation

OA1 OB1

OA2 OB2

V

DESCRIPTION…

The SP495 is a quad differential line driver/receiver meeting both RS-485 and RS-422

standards at data rates beyond 10Mbps. The SP495 features three half-duplex transceivers

suitable for data bus connections and a fourth full-duplex transceiver with independent driver,

receiver enables. Ideal for use as a control bus transceiver. A complete SCSI initiator or target

interface can be implemented using five SP495s. Propagation Delay Skew is tightly specified

to aid in parallel interface designs. The SP495 is available in a 20-pin plastic SOIC package

for operation over the commercial and industrial temperature ranges. For PLCC availability,

please consult factory.

s Pinout for SCSI Interface

s Meets EIA-485 Standard for Multipoint

Bus Transmission

s +5V-Only Power Supply Required

s Receiver Fail-Safe Mode

s Low Power BiCMOS Technology

s Glitch-Free Power-Up/Down

s Available in 20-Pin Plastic SOIC

s Pin Compatible with DS36954

SP495

20

19

18

17

16

2

1

3

4

11

15 14

13

12

6

5

8

9

7

10

DR1 DE1/RE1

DR2 DE2/ RE2

GND

DR3 DE3/ RE3

DI4 DE4

RO4 RE4

cc OA3 OB3

OA4 OB4

SP495

®

Quad Differential RS-485 Transceiver