ST202B datasheet(5/17 Pages) STMICROELECTRONICS

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ST202B - ST202C

Electrical characteristics

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Electrical characteristics

Table 4.

Electrical characteristics

(C1 - C4 = 0.1 µF, VCC = 5 V ± 10 %, TA = -40 to 85 °C, unless otherwise specified. Typical

values are referred to TA = 25 °C).

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

ISUPPLY

VCC power supply current

No Load

1.5

Table 5.

Transmitter electrical characteristics

(C1 - C4 = 0.1 µF, VCC = 5 V ± 10 %, TA = -40 to 85 °C, unless otherwise specified. Typical

values are referred to TA = 25 °C).

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VTOUT

Output voltage swing

All transmitter outputs are loaded

with 3k

Ω to GND

± 5

± 9V

ITIL

Logic pull-up current

TIN = 0V

µA

VTIL

Input logic threshold low

0.8

1.4

VTIH

Input logic threshold high

1.4

SRT

Transition slew rate

TA = 25°C, VCC = 5V

RL = 3 to 7kΩ, CL = 50 to 2500pF

(1)

612

V/µs

Data rate

(2)

200

400

kbits/s

RTOUT

Transmitter output resistance

VCC = V+ = V- = 0V VOUT = ± 2V

300

ISC

Transmitter output short circuit

current

One TXOUT to GND

± 7

± 22

tDT

Propagation delay time

TTL-CMOS IN to RS-232 OUT

CL = 150pF (50% to 50%)

1.3

3.5

µs

Measured from 3 V to -3 V or from -3 V to 3 V

One transmitter output is loaded with RL = 3 kΩ to 7 kΩ, CL = 50 to 1000 pF

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