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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-7000 • Fax (50)668-707 • www.exar.com

SP232A_00_05308

DYnAMiC CHARACTERiSTiCS

Driver Propagation Delay

TTL to RS_232; CL = 50pF

.5

3.0

μs

Receiver Propagation Delay

RS-232 to TTL,

0.

.0

μs

Instantaneous Slew Rate

CL = 10pF, RL = 3-7kΩ

30

V/ μs

Transition Region Slew Rate

CL = 2500pF, RL = 3kΩ;

Measured from +3V to -3V or

-3V to +3V

0

V/ μs

PoWER REQUiREMEnTS

Vcc Power Supply Current

=25°C

.5

5

mA

Vcc Power Supply Current, Loaded

All Transmitters RL = 3kΩ,

=25°C



mA

ELECTRiCAL CHARACTERiSTiCS

Vcc=5V ±0%, 0.

, unless otherwise noted, Typical values are Vcc=5V

=25°C

Pin ASSignMEnTS

Pin number

Pin name

Pin Function



C+

Positive terminal of the voltage doubler charge pump

capacitor

2

V+

+6.5V generated by the charge pump

3

C-

Negative terminal of the voltage doubler charge pump

capacitor

4

C2+

Positive terminal of the inverting charge pump capacitor

5

C2-

Negative terminal of the inverting charge pump capacitor

6

V-

-6.7V generated by the charge pump

7

T2OUT

RS-232 driver output

8

R2IN

RS-232 receiver input

9

R2OUT

TTL/CMOS receiver output

0

T2IN

TTL/CMOS driver input



TIN

TTL/CMOS driver input

2

ROUT

TTL/CMOS receiver output

3

RIN

RS-232 receiver input

4

TOUT

RS-232 driver output

5

GND

Ground

6

Vcc

5V supply voltage