®
SP3483
+3.3V Low Power Slew Rate Limited
Half-Duplex RS-485 Transceiver
■ RS-485 and RS-422 Transceiver
■ Operates from a single +3.3V supply
■ Interoperable with +5.0V logic
■ Driver/Receiver Enable
1
2
3
4
8
7
6
5
VCC
B
RO
RE
DE
DI
SP3483
■ Low Power Shutdown Mode
■ -7V to +12V Common-Mode Input
A
Voltage Range
8 Pin nSOIC
GND
■ Allows up to 32 transceivers on
the serial bus
■ Compatibility with the industry
Now Available in Lead Free Packaging
standard 75176 pinout
■ Driver Output Short-Circuit Protection
■ Slew Rate Limited Driver for Low EMI
(SP3483)
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
OUTPUTS
INPUTS
OUTPUTS
LINE
RE DE DI CONDITION
RE
DE
0
A - B
+0.2V
R
1
B
0
A
1
0
0
0
1
X
X
X
1
1
0
1
0
No Fault
No Fault
X
0
-0.2V
0
1
0
0
Inputs Open
X
1
X
Z
Z
0
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 ]
