ST232AD 查看數據表（PDF） - STMicroelectronics

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ST232AD

VERY HIGH SPEED, ULTRA LOW POWER CONSUMPTION 5V POWERED RS-232 DRIVERS AND RECEIVERS

STMicroelectronics 

ST232A

ELECTRICAL CHARACTERISTICS

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

Typical Valus are referred to TA = 25 oC)

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P ar ame te r

Test Conditions

Va l u e

Min. Typ.

ISUPPLY VCC Power Supply Current

No Load

1.5

Max.

4

Unit

mA

TRANSMITTER ELECTRICAL CHARACTERISTICS

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

Typical Valus are referred to TA = 25 oC)

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Test Conditions

Va l u e

VTOUT Output Voltage Swing

All Transmitter outputs are

loaded with 3KΩ to GND

Min.

±5

T yp.

±9

ITIL Logic Pull-Up Current

VTIL Input Logic Threshold Low

VTIH Input Logic Threshold High

SRT Transition Slew Rate

DR Data Rate

RTOUT Transmitter Output Resistance

ISC Transmitter Output Short Circuit

Current

TIN = 0 V

TA = 25 oC, VCC = 5 V,

RL = 3 to 7 KΩ,

CL= 50 to 2500 pF (Note 1)

(Note 2)

VCC = V+ = V- = 0V

VOUT = ± 2 V

one TXOUT to GND

5

0.8

1.4

1.4

6

12

200 400

300 10M

±7

±22

tdT Propagation Delay Time

TTL-CMOS IN to RS-232 OUT

1.3

CL= 150 pF (50% to 50%)

Note 1: Measured from 3V to -3Vor from -3V to 3V.

Note 2: One trasmitter output is loaded with RL = 3KΩ to7KΩ, CL = 50 to 1000pF

Max.

40

2

30

3.5

Unit

V

µA

V

V

V/µs

Kbits/s

Ω

mA

µs

RECEIVER ELECTRICAL CHARACTERISTICS

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

Typical Valus are referred to TA = 25 oC)

Symb ol

P ar ame te r

Test Conditions

Va l u e

Min. Typ.

VRIN Receiver Input Voltage Operating

Range

RRIN RS-232 Input Resistance

VRIL

VRIH

VRIHYS

RS-232 Input Logic Threshold Low

RS-232 Input Logic Threshold High

RS-232 Input Hysteresis

VROL TTL/CMOS Output Voltage Low

VROH

ISCR

TTL/CMOS Output Voltage High

Receiver Output Short Circuit

Current

tdR Propagation Delay Time

Note 1: RS-232 IN to TTL-CMOS OUT (from 50% to 50%)

TA = 25 oC,

VCC = 5 V

IOUT = 3.2mA (to VCC)

IOUT = 1mA (to GND)

to GND

to VCC

CL=150pF (Note 1)

-30

3

5

0.8

1.3

1.8

0.2

0.5

0.2

3.5 VCC-0.2

2

10

10

30

0.1

Max.

30

7

2.4

1

0.4

0.5

Unit

V

KΩ

V

V

V

V

V

mA

mA

µs

3/10

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