FEATURES FUNCTIONAL BLOCK DIAGRAMS

460 kbps data rate

Specified at 3.3 V

Meets EIA-232E specifications

0.1 μF charge pump capacitors

Low power shutdown (ADM3222 and ADM1385)

PDIP, SOIC_N, SOIC_W, SSOP, and TSSOP options

Upgrade for MAX3222/MAX3232 and LTC1385

ESD protection to IEC 1000-4-2 (801.2)

on RS-232 pins (ADM3202 only)

±8 kV: contact discharge

±15 kV: air gap discharge

APPLICATIONS

General-purpose RS-232 data link

Portable instruments

Printers, palmtop computers, PDAs

GENERAL DESCRIPTION

The ADM3202/ADM3222/ADM1385 transceivers are high

speed, 2-channel RS-232/V.28 interface devices that operate

from a single 3.3 V power supply. Low power consumption and

a shutdown facility (ADM3222/ADM1385) make them ideal for

battery-powered portable instruments.

The ADM3202/ADM3222/ADM1385 parts conform to the

EIA-232E and CCITT V.28 specifications and operate at data

rates up to 460 kbps.

Four external 0.1 μF charge pump capacitors are used for the

voltage doubler/inverter, permitting operation from a single

3.3 V supply.

The ADM3222 contains additional enable and shutdown

circuitry. The ^EN input can be used to three-state the receiver

outputs. The ^SD input is used to power down the charge pump

and transmitter outputs, reducing the quiescent current to less

than 0.5 μA. The receivers remain enabled during shutdown

unless disabled using ^EN.

The ADM1385 contains a driver disable mode and a complete

shutdown mode.

The ADM3202 is available in a 16-lead PDIP, SOIC_W,

and SOIC_N, as well as a space-saving 16-lead TSSOP. The ADM3222

is available in 18-lead PDIP and SOIC_W and in 20-lead SSOP and TSSOP.

The ADM1385 is available in a 20-lead SSOP,

which is pin-compatible with the LTC1385 CG.

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