Texas Instruments MAX3243E Bedienungsanleitung

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MAX3243E 3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver

With ±15-kV IEC ESD Protection

1 Features

•Single-chip and single-supply interface

for IBM

™

PC/AT

™

serial port

•ESD Protection for RS-232 bus pins

–±15-kV Human-body model (HBM)

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

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

•Meets or exceeds requirements of

TIA/EIA-232-F and ITU V.28 standards

•Operates with 3-V to 5.5-V V

CC

supply

•Always-active noninverting receiver

output (ROUT2B)

•Designed to transmit at a data rate

up to 500 kbit/s

•Low standby current: 1 μA typical

•External capacitors: 4 × 0.1 μF

•Accepts 5-V logic input with 3.3-V supply

•Designed to Be interchangeable with

maxim MAX3243E

•Serial-Mouse Driveability

•Auto-powerdown feature to disable driver outputs

when no valid RS-232 signal is sensed

•Package options include plastic small-outline

(DW), shrink small-outline (DB), and thin shrink

small-outline (PW) packages

2 Applications

•Battery powered systems

•Wired Networking

•Data center and enterprise computing

•Battery-powered systems

•Notebooks

•Laptops

•Palmtop PCs

•Hand-held equipment

3 Description

The MAX3243E device consists of three line drivers,

five line receivers, and a dual charge-pump circuit

with ±15-kV ESD (HBM and IEC61000-4-2, Air-Gap

Discharge) and ±8-kV ESD (IEC61000-4-2, Contact

Discharge) protection on serial-port connection

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. This combination of

drivers and receivers matches that needed for

the typical serial port used in an IBM PC/AT, or

compatible. The charge pump and four small external

capacitors allow operation from a single 3-V to 5.5-

V supply. In addition, the device includes an always-

active noninverting output (ROUT2B), which allows

applications using the ring indicator to transmit data

while the device is powered down.

Package Information

PART NUMBERPACKAGE

(1)

BODY SIZE (NOM)

MAX3243E

SSOP (DB) (28)10,20 mm × 5,30 mm

SOIC (DW) (28)17,90 mm × 7,50 mm

TSSOP (PW) (28)9,70 mm × 4,40 mm

VQFN (RHB) (32)5,00 mm × 5,00 mm

(1)For all available packages, see the orderable addendum at

the end of the data sheet.

DIN

DOUTx

RS-232

33

POWER

AUTO-

POWERDOWN

5

5

FORCEOFF

FORCEON

RIN

RS-232

ROUT

RIN2

RS-232

ROUT2B

STATUS

INVALID

3.3 V, 5 V

TX

RX

RX

Simplified Circuit

MAX3243E

SLLS657E – APRIL 2005 – REVISED OCTOBER 2022

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.

Produktspezifikationen