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

SP207E_00_072309

2

AbSOLuTE MAxIMuM RATINgS

These are stress ratings only and functional opera-

tion of the device at these or any other above those

indicatedintheoperationsectionsofthespecifica-

tions below is not implied. Exposure to absolute

maximum rating conditions for extended periods of

time may affect reliability.

V

Input Voltages

T

R

OutputVoltages

T

+

R

Short Circuit Duration on T

SPECIFICATIONS

V

Power Dissipation Per Package

PARAMETER

MIN.

TYP.

MAx.

uNIT

CONDITIONS

TTL INPuTS

T

Logic Threshold V

IL

0.8

Volts

Logic Threshold V

IH

2.0

Volts

LogicPull-UpCurrent

5

200

µA

T

Maximum Transmission Rate

20

230

kbps

C

TTL OuTPuTS

Compatibility

TTL/CMOS

V

OL

0.4

Volts

I

V

OH

3.5

Volts

I

Leakage Current

0.05

+/-10

µA

0V≤V

= 0V; SP23E EN = Vcc, T

+25ºC

RS-232 OuTPuT

OutputVoltageSwing

+/-5

+/-7

Volts

All transmitter outputs loaded

with3kΩtoground

OutputResistance

300

Ω

Vcc = 0V; V

OutputShortCircuitCurrent

+/-25

mA

Infinite Duration, V

RS-232 INPuT

Voltage Range

-5

+5

Volts

Voltage Threshold Low

0.8

.2

Volts

Vcc = 5V, T

Voltage Threshold High

.7

2.8

Volts

Vcc = 5V, T

Hysteresis

0.2

0.5

.0

Volts

Vcc = 5V

Resistance

3

5

7

kΩ

V

DYNAMIC CHARACTERISTICS

Driver Propagation Delay

.5

µs

TTL to RS-232

Receiver Propagation Delay

0.5

.5

µs

RS-232 to TTL

Instantaneous Slew Rate

30

V/µs

C

T