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TRS3221E

3-V TO 5.5-V SINGLE-CHANNEL RS-232 LINE DRIVER/RECEIVER

WITH

±15-kV IEC ESD PROTECTION

SLLS792 – JUNE 2007

ORDERING INFORMATION

ORDERABLE PART NUMBER

TOP-SIDE MARKING

Tube of 80

TRS3221ECDB

SSOP – DB

RS21EC

Reel of 2000

TRS3221ECDBR

0

°C to 70°C

Tube of 90

TRS3221ECPW

TSSOP – PW

RS21EC

Reel of 2000

TRS3221ECPWR

Tube of 80

TRS3221EIDB

SSOP – DB

RS21EI

Reel of 2000

TRS3221EIDBR

–40

°C to 85°C

Tube of 90

TRS3221EIPW

TSSOP – PW

RS21EI

Reel of 2000

TRS3221EIPWR

(1)

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

(2)

For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

website at www.ti.com.

FUNCTION TABLES

ABC

INPUTS

OUTPUT

DRIVER STATUS

VALID RIN

DOUT

DIN

FORCEON

FORCEOFF

RS-232 LEVEL

X

X

L

X

Z

Powered off

L

H

H

X

H

Normal operation with

auto-powerdown disabled

H

H

H

X

L

L

L

H

Yes

H

Normal operation with

auto-powerdown enabled

H

L

H

Yes

L

L

L

H

No

Z

Powered off by

auto-powerdown feature

H

L

H

No

Z

(1)

H = high level, L = low level, X = irrelevant, Z = high impedance

INPUTS

OUTPUT

VALID RIN

ROUT

RIN

EN

RS-232 LEVEL

L

L

X

H

H

L

X

L

X

H

X

Z

Open

L

No

H

(1)

H = high level, L = low level, X = irrelevant, Z = high impedance

(off), Open = disconnected input or connected driver off

2

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