ST202B Просмотр технического описания (PDF) - STMicroelectronics

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ST202B

5 V powered multi-channel RS-232 drivers and receivers

STMicroelectronics 

ST202B - ST202C

3

Electrical characteristics

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 4

mA

Table 5.

Symbol

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).

Parameter

Test condition

Min. Typ. Max. Unit

VTOUT Output voltage swing

All transmitter outputs are loaded

with 3kΩ to GND

ITIL

VTIL

VTIH

SRT

DR

RTOUT

ISC

Logic pull-up current

Input logic threshold low

Input logic threshold high

Transition slew rate

Data rate

Transmitter output resistance

Transmitter output short circuit

current

TIN = 0V

TA = 25°C, VCC = 5V

RL = 3 to 7kΩ, CL = 50 to 2500pF (1)

(2)

VCC = V+ = V- = 0V VOUT = ± 2V

One TXOUT to GND

tDT Propagation delay time

TTL-CMOS IN to RS-232 OUT

CL = 150pF (50% to 50%)

1. Measured from 3 V to -3 V or from -3 V to 3 V

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

±5 ±9

5

0.8 1.4

1.4

6

12

200 400

300

± 7 ± 22

1.3

V

40 µA

V

2

V

30 V/µs

kbits/s

Ω

mA

3.5 µs

5/17

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