MAX3212EAI+ datasheet, PDF - EEWORLD Datasheet

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MAX3212EAI+: DescriptionRS-232 interface IC 2.7-3.6V 1ua 3-drvr 5-receiver tsvr; CategoryAnalog mixed-signal IC Drivers and interfaces; File Size136KB，12 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html; Environmental Compliance

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MAX3212EAI+ Overview

RS-232 interface IC 2.7-3.6V 1ua 3-drvr 5-receiver tsvr

MAX3212EAI+ Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Parts packaging code	SSOP
package instruction	SSOP, SSOP28,.3
Contacts	28
Reach Compliance Code	compli
ECCN code	EAR99
Other features	ADDITIONAL OUTPUT FOR 1 RECEIVER; TRISTATABLE RECEIVERS; AUTO SHUTDOWN
Differential output	NO
Number of drives	3
High level input current maximum value	0.000001 A
Input properties	SCHMITT TRIGGER
Interface integrated circuit type	LINE TRANSCEIVER
Interface standards	EIA-232-E; V.24; V.28; EIA-562
JESD-30 code	R-PDSO-G28
JESD-609 code	e3
length	10.2 mm
Humidity sensitivity level	1
Number of functions	1
Number of terminals	28
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Minimum output swing	5 V
Output characteristics	3-STATE
Maximum output low current	0.001 A
Output polarity	INVERTED
Package body material	PLASTIC/EPOXY
encapsulated code	SSOP
Encapsulate equivalent code	SSOP28,.3
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	260
power supply	3/3.3 V
Certification status	Not Qualified
Maximum receive delay	2000 ns
Number of receiver bits	5
Maximum seat height	1.99 mm
Maximum slew rate	3 mA
Maximum supply voltage	3.6 V
Minimum supply voltage	2.7 V
Nominal supply voltage	3.3 V
surface mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
maximum transmission delay	2000 ns
width	5.29 mm
Base Number Matches	1

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19-0312; Rev 0; 9/94

+2.7V to +3.6V-Powered, 1µA Supply Current,

3-Driver/5-Receiver, True RS-232 Transceiver

_______________General Description

The MAX3212 uses Maxim’s new proprietary Auto-

Shutdown mode to reduce supply current to 1µA. The

MAX3212, with 3 RS-232 drivers and 5 RS-232 receivers,

is intended for 2.7V to 3.6V-powered EIA/TIA-232E and

V.28/V.24 serial interface. True RS-232 levels are main-

tained across the operating range. A guaranteed data

rate of 235kbps provides compatibility with popular soft-

ware for communicating with personal computers.

Supply current is reduced to 1 µA with Maxim’s new

AutoShutdown feature. When the MAX3212 does not

sense a valid signal level on the receiver inputs, the on-

board power supply and drivers shut down. This occurs

if the RS-232 cable is disconnected or if the transmit-

ters of the connected peripheral are turned off. The sys-

tem turns on again when a valid level is applied to any

RS-232 receiver input. As a result, the system saves

power without changes to the existing software.

A second power-management feature is incorporated to

permit automatic shutdown when the RS-232 connection

is valid but inactive. In this case, a transition detector

facilitates shutdown when the receivers are presented

with stationary RS-232 levels for long periods.

Three-state drivers are provided on receiver outputs so

that multiple receivers, generally of different interface

standards, can be wire-ORed at the UART. The

MAX3212 is available in 28-pin SO and SSOP packages.

____________________________Features

BETTER THAN BIPOLAR!

1µA Supply Current Using AutoShutdown

Operates from Single +2.7V to +3.6V Supply

28-Pin SSOP or Wide SO Packages

Meets All EIA/TIA-232E & EIA/TIA-562 Specifications

Mouse Driveability–Guaranteed

Low-Cost, Surface-Mount External Components

235kbps Guaranteed Data Rate–

LapLink™ Compatible

+5V Logic Compatible

Complementary Receiver Output Always Active

Flow-Through Pinout

MAX3212*

__________Typical Operating Circuit

0.68µF 1N6050 15µH

+3.0V

0.33µF

3 27

V+ LN

26 FORCEON

+3.0V

25 FORCEOFF

5 TRAN

INVALID

9 R2OUT

10 R3OUT

11 R4OUT

R3IN 22

R2IN 23

T1OUT 19

T2OUT 18

T3OUT 17

R1IN 24

13 T1IN

14 T2IN

15 T3IN

1N6050

2 16

V-

0.33µF

MAX3212

________________________Applications

Notebook and Palmtop Computers

Peripherals

Instruments

Battery-Powered Equipment

8 R1OUT

______________Ordering Information

PART

MAX3212CWI

MAX3212CAI

MAX3212EWI

MAX3212EAI

TEMP. RANGE

0°C to +70°C

-40°C to +85°C

PIN-PACKAGE

28 Wide SO

28 SSOP

28 Wide SO

28 SSOP

+3.0V

12 R5OUT

7 R5OUTB

GND

R4IN 21

R5IN 20

AUTOSHUTDOWN OPERATION

FORCEOFF = HIGH, FORCEON = LOW

Pin Configuration appears at end of data sheet.

* ng

RS-232 Present

Yes

Status

Shut Down

________________________________________________________________

Maxim Integrated Products

Call toll free 1-800-998-8800 for free samples or literature.

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