ST3485EB Datasheet, PDF (1/22 Pages) STMicroelectronics – 3.3 V powered, 15 kV ESD protected, up to 12 Mbps RS-485/RS-422 transceiver

ST3485EB
ST3485EC
3.3 V powered, 15 kV ESD protected,
up to 12 Mbps RS-485/RS-422 transceiver
Features
■ ESD protection
– ±15 kV human body model
– ±8 kV IEC 1000-4-2 contact discharge
■ Operate from a single 3.3 V supply - no charge
pump required
■ Interoperable with 5 V logic
■ 1 µA low current shutdown mode max
■ Guaranteed 12 Mbps data rate
■ -7 to 12 V common mode input voltage range
■ Half duplex versions available
■ Industry standard 75176 pinout
■ Current limiting and thermal shutdown for
driver overload protection
■ Guaranteed high receiver output state for
floating inputs with no signal present
■ Allow up to 64 transceivers on the bus
Description
The ST3485E is ±15 kV ESD protected, 3.3 V low
power transceiver for RS-485 and RS-422
communications. The device contains one driver
and one receiver in half duplex configuration. The
ST3485E transmits and receives at a guaranteed
data rate of at least 12 Mbps.
All transmitter outputs and receiver inputs are
protected to ±15 kV using Human Body Model.
DIP-8
SO-8
Driver is short-circuit current limited and is
protected against excessive power dissipation by
thermal shutdown circuitry that places the driver
outputs into a high-impedance state.
Table 1. Device summary
Order code
Temperature range
ST3485ECN
0 to 70 °C
ST3485ECDR
0 to 70 °C
ST3485EBDR
-40 to 85 °C
November 2007
Package
DIP-8
SO-8 (tape and reel)
SO-8 (tape and reel)
Rev 5
Packaging
50 parts per tube / 40 tube per box
2500 parts per reel
2500 parts per reel
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