®
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–
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SP334
28
27
26
25
24
23
22
21
20
19
18
17
16
15
TI2
TI1
RXEN
RS232/RS485
RI5
RX5
RX4
RX3
RX2
RX1
RI4
RI3
RI2
RI1
(in RS-232 mode)
SP334DS/10
Programmable RS-232/RS-485 Transceiver
© Copyright 2000 Sipex Corporation
1
SIPEX [ SIPEX CORPORATION ]
