January 2008

Rev 6

1/13

13

ST3222B

ST3222C

3 to 3.6 V, low power, up to 400 kbps

RS-232 drivers and receivers

Features

Description

The ST3222 is a 3 V powered EIA/TIA-232 and

V.28/V.24 communications interface with low

power requirements and high data-rate

capabilities. ST3222 has a proprietary low

dropout transmitter output stage providing true

RS-232 performance from 3 to 3.6 V power

supplies. The device requires only four small 0.1

mF standard external capacitors for operating

from 3 V supply. The ST3222 has two receivers

and two drivers. The ST3222 features a 1 mA

shutdown mode that reduces power consumption

and extends battery life in portable systems. Its

receivers can remain active in shutdown mode,

allowing external devices such as modems to be

monitored using only 1 mA supply current. The

device is guaranteed to run at data rates of

250Kbps while maintaining RS-232 output levels.

Typical applications are Notebook, Sub-notebook

and Palmtop Computers, Battery Powered

Equipment, Hand-Held Equipment, Peripherals

and Printers.

TSSOP

Table 1.

Device summary

Order codes

Temperature

range

Package

Packaging

ST3222CTR

0 to 70 °C

TSSOP20 (tape and reel)

2500 parts per reel

ST3222BTR

-40 to 85 °C

TSSOP20 (tape and reel)

2500 parts per reel

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