1/13

March 2004

s

ESD PROTECTION FOR RS-232 I/O PINS:

±8KV IEC 1000-4-2 CONTACT DISCHARGE

±15KV HUMAN BODY MODEL

s

1

µA SUPPLY CURRENT ACHIEVED WHEN

IN AUTO-POWERDOWN

s

250Kbps MINIMUM GUARANTEED DATA

RATE

s

GUARANTEED 6V/

µsSLEW RATERANGE

s

GUARANTEED MOUSE DRIVEABILITY

s

0.1

µF EXTERNAL CAPACITORS

s

MEET EIA/TIA-232 SPECIFICATIONS DOWN

TO 3V

s

AVAILABLE IN SO-28, SSOP28 AND

TSSOP28 PACKAGES

DESCRIPTION

The ST3241E device consists of 3 drivers, 5

receivers and a dual charge-pump circuit. The

device meets the requirements of EIA/TIA and

V.28/V.24 communication standards providing

high

data

rate

capability

and

enhanced

electrostatic

discharge

(ESD)

protection.

All

transmitter

outputs

and

receiver

input

are

protected to ±8KV USING IEC 1000-4-2 contact

discharge and ±15KV using the Human Body

Model. The receiver R2 is always active to

implement a wake-up feature for serial port.

The ST3241E has a proprietary low-dropout

transmitter output stage enabling true RS-232

performance from a 3.0V to 5.5V supply with a

dual charge pump. The device is guaranteed to

run at data rates of 250kbps while maintaining

RS-232 output levels.

It is a complete serial port (3 drivers, 5 receivers)

intended for notebook or subnotebook computers.

Receivers R1 and R2 have extra outputs in

addition to their standard outputs. These extra

output are always active.

Typical application are in notebook, subnotebook,

palmtop computers, battery-powered equipment,

hand-held equipment, peripherals and printers.

ST3241E

±15KV ESD PROTECTED 3 TO 5.5V, 400KBPS,

RS-232 TRANSCEIVER WITH AUTO-POWERDOWN

SSOP

SOP

TSSOP