ST232AB Просмотр технического описания (PDF) - STMicroelectronics

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ST232AB

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

STMicroelectronics 

ST232AB - ST232AC

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, TA = 25°C

1.5 4

mA

Table 5.

Symbol

Transmitter electrical characteristics

(C1 - C4 = 0.1 µF, VCC = 5V ± 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

±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 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.

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