ST3485EC データシートの表示（PDF） - STMicroelectronics

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ST3485EC

3.3 V powered, 15 kV ESD protected, up to 12 Mbps RS-485/RS-422 transceiver

STMicroelectronics 

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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