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SP334DS/10

Programmable RS-232/RS-485 Transceiver

© Copyright 2000 Sipex Corporation

SP334

Programmable RS-232/RS-485 Transceiver

s +5V Only Operation

s Software Programmable RS-232 or RS-

485 Selection

s Three RS-232 Drivers and Five Receivers

in RS-232 Mode

s Two RS-485 Full-Duplex Transceivers in

RS-485 Mode

s Full Differential Driver Tri-State (Hi-Z)

Control

s Receiver Output Tri-State Control

DESCRIPTION…

The SP334 is a programmable RS-232 and/or RS-485 transceiver IC. The SP334 contains three

drivers and five receivers when selected in RS-232 mode; and two drivers and two receivers when

selected in RS-485 mode.

The RS-232 transceivers can typically operate at 230kbps while adhering to the RS-232

specifications. The RS-485 transceivers can operate up to 10Mbps while adhering to the RS-485

specifications. The RS-485 drivers can be disabled (High-Z output) by the TXEN enable pin. The

RS-232 and RS-485 receiver outputs can be disabled by the RXEN enable pin.

TI3

TXEN(n/c)

TX4(n/c)

TX3

VCC

TX1

TX2

GND

C1+

V+

C2+

C1–

C2–

V–

TI2

TI1

RXEN

RS232/RS485

RI5

RX5

RX4

RX3

RX2

RX1

RI4

RI3

RI2

RI1

28

27

26

25

24

23

22

21

20

19

18

17

16

15

1

2

3

4

5

6

7

8

9

10

11

12

13

14

SP334

(in RS-232 mode)

®