SP3483EN-L Datasheet, PDF (1/9 Pages) Exar Corporation – +3.3V Low Power Slew Rate Limited Half-Duplex RS-485 Transceiver

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
• 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
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 compat-
ible with the Exar SP483 device as well as popular industry standards. The SP3483 features
Exar's BiCMOS design allowing low power operation without sacrificing performance. The
SP3483 is slew rate limited to reduce EMI and can meet the requirements of the RS-485
and RS-422 protocols up to 250kbps.
TRUTH TABLES
INPUTS
RE DE DI
X 11
X 10
X 0X
LINE
CONDITION
No Fault
No Fault
X
OUTPUTS
B
A
0
1
1
0
Z
Z
Table 1. Transmit Function Truth Table
INPUTS
RE DE
00
00
00
10
A-B
+0.2V
-0.2V
Inputs Open
X
OUTPUTS
R
1
0
1
Z
Table 2. Receive Function Truth Table
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP3483_100_010912