®
SP3483
+3.3V Low Power Slew Rate Limited
Half-Duplex RS-485 Transceiver
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RS-485 and RS-422 Transceiver
Operates from a single +3.3V supply
Interoperable with +5.0V logic
Driver/Receiver Enable
Low Power Shutdown Mode
-7V to +12V Common-Mode Input
Voltage Range
Allows up to 32 transceivers on
the serial bus
Compatibility with the industry
standard 75176 pinout
Driver Output Short-Circuit Protection
Slew Rate Limited Driver for Low EMI
(SP3483)
RO
1
RE
2
DE
3
DI
4
8
VCC
SP3483
8 Pin nSOIC
7
B
6
A
5
GND
Now Available in Lead Free Packaging
DESCRIPTION
The
SP3483
device is part of a family of +3.3V low power half-duplex transceivers that meet
the specifications of the RS-485 and RS-422 serial protocols. This device is pin-to-pin
compatible with the
Sipex SP483
device as well as popular industry standards. The
SP3483
features
Sipex's
BiCMOS process, allowing low power operation without sacrificing
performance. The
SP3483
is internally slew rate limited to reduce EMI and can meet the
requirements of RS-485 and RS-422 up to 250kbps.
TRUTH TABLES
INPUTS
RE
X
X
X
DE
1
1
0
DI
1
0
X
LINE
CONDITION
No Fault
No Fault
X
OUTPUTS
B
0
1
Z
A
1
0
Z
INPUTS
RE
DE
0
0
0
0
0
0
1
0
OUTPUTS
A-B
R
+0.2V
1
-0.2V
0
Inputs Open
1
X
Z
Table 1. Transmit Function Truth Table
Table 2. Receive Function Truth Table
Date: 6/23/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
© Copyright 2004 Sipex Corporation
1
SIPEX [ SIPEX CORPORATION ]
