ST232A Просмотр технического описания (PDF) - STMicroelectronics

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ST232A

Very high speed, ultra low power consumption 5V Powered RS-232 drivers and receivers

STMicroelectronics 

ST232

3

Electrical characteristics

Electrical characteristics

Table 3.

Electrical characteristics

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

values are referred to TA = 25°C).

Symbol

Parameter

Test

Min. Typ. Max. Unit

ISUPPLY VCC Power supply current

No Load, TA = 25°C

1.5 4

mA

Table 4.

Symbol

Transmitter electrical characteristics

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

values are referred to TA = 25°C).

Parameter

Test

Min. Typ. Max. Unit

VTOUT Output voltage swing

All transmitter outputs are loaded

with 3KΩ to GND

±5 ±9

V

ITIL Logic Pull-up current

TIN = 0V

5

VTIL Input logic threshold low

0.8 1.4

VTIH Input logic threshold high

1.4

SRT Transition slew rate

DR Data rate

TA = 25°C, VCC = 5V

RL = 3 to 7KΩ, CL = 50 to 2500pF (1)

6

12

(2)

200 400

RTOUT Transmitter output resistance VCC = V+ = V- = 0V VOUT = ± 2V

300

ISC

Transmitter output short circuit

current

One TXOUT to GND

±7 ±22

40 µA

V

2

V

30 V/µs

Kbits/s

Ω

mA

tDT Propagation delay time

TTL-CMOS IN to RS-232 OUT

CL = 150pF (50% to 50%)

1.3 3.5 µs

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

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

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