Texas Instruments MAX3222E Handleiding

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MAX3222E 3V to 5.5V Multichannel RS-232 Line Driver and Receiver With ±15kV ESD

Protection

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 with 3V to 5.5V V

CC

supply

•Operates up to 500kbit/s

•Two drivers and two receivers

•Low standby current: 1μA typical

•External capacitors: 4 × 0.1μF

•Accepts 5V logic input with 3.3V supply

•Alternative high-speed pin-compatible device

(1Mbit/s) for SNx5C3222E

2 Applications

•Industrial PCs

•Wired networking

•Data center and networking equipment

•Notebooks

•Hand-held equipment

3 Description

The MAX3222E consists of two line drivers, two line

receivers, and a dual charge-pump circuit with ±15kV

ESD protection pin to pin (serial-port connection pins,

including GND).

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 3V

to 5.5V supply. The device operates at typical data

signaling rates up to 500kbit/s and a maximum of

30V/μs driver output slew rate.

The MAX3222E can be placed in the power-down

mode by setting the power-down ( PWRDOWN) input

low, which draws only 1μA from the power supply.

When the device is powered down, the receivers

remain active while the drivers are placed in the

high-impedance state. Also, during power down, the

onboard charge pump is disabled; V+ is lowered to

V

CC

, and V– is raised toward GND. Receiver outputs

also can be placed in the high-impedance state by

setting enable ( EN) high.

Package Information

PART NUMBERPACKAGE

(1)

PACKAGE SIZE

(2)

MAX3222E

DB (SSOP, 20)7.2mm x 7.8mm

DW (SOIC, 20)12.8mm x 10.3mm

PW (TSSOP, 20)6.5mm x 6.4mm

DGS (VSSOP, 20)5.1mm x 4.9mm

(1)For more information, see Section 11.

(2)The package size (length × width) is a nominal value and

includes pins, where applicable.

DIN2

DOUT2

128

Powerdown

RIN1

16

20

15

PWRDOWN

ROUT1

DIN1

DOUT1

1317

RIN2

910

ROUT2

1

EN

5 kW

5 kW

Pin numbers are for the DB, DW, and PW packages.

Logic Diagram (Positive Logic)

MAX3222E

SLLS708E – JANUARY 2006 – REVISED DECEMBER 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Product specificaties