1 Features

• ESD Protection for RS-232 bus pins

– ±15kV Human-body model (HBM)

– ±8kV IEC61000-4-2, Contact discharge

– ±15kV IEC61000-4-2, Air-gap discharge

• Meets or exceeds the requirements of TIA/

EIA-232-F and ITU v.28 standards

• Operates at 5V VCC supply

• Four drivers and five receivers

• Operates up to 120kbit/s

• Low supply current in shutdown

mode: 15μA typical

• Designed to be interchangeable with industry

standard '213 devices

• Latch-up performance exceeds 100mA per JESD

78, class II

2 Applications

• Battery-powered systems

• PDAs

• Notebooks

• Laptops

• Palmtop PCs

• Hand-held equipment

3 Description

The TRS213E consists of four line drivers, five

line receivers, and a dual charge-pump circuit with

±15kV IEC ESD protection on the RS-232 bus pins.

The device meets the requirements of TIA/EIA-232-

F, and provides the electrical interface between

an asynchronous communication controller and the

serial-port connector. The charge pump and four small

external capacitors allow operation from a single 5V

supply. The devices operate at data signaling rates up

to 120kbit/s and a maximum of 30V/μs driver output

slew rate.

The TRS213E has an active-low shutdown (SHDN)

and an active-high enable control (EN). In shutdown

mode, the charge pumps are turned off, V+ is pulled

down to VCC, V– is pulled to GND, and the transmitter

outputs are disabled. This reduces supply current

typically to 1μA. Two receivers of the TRS213E are

active during shutdown.