ST202B datasheet(6/18 Pages) STMICROELECTRONICS

部件名	ST202B

功能描述	5V Powered multi-channel RS-232 drivers and receivers

PDF	18 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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6 / 18 page

Electrical characteristics

ST202B - ST202C

6/18

Table 6.

Receiver 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 condition

Min.

Typ.

Max.

Unit

VRIN

Receiver input voltage

operating range

-30

RRIN

RS-232 Input resistance

TA = 25°C

VRIL

RS-232 Input threshold low

0.8

1.3

VRIH

RS-232 Input threshold high

1.8

2.4

VRIHYS

RS-232 Input hysteresis

VCC = 5V

0.2

0.5

VROL

TTL/CMOS Output voltage low

IOUT = 3.2mA (to VCC)0.2

0.4

VROH

TTL/CMOS Output voltage high IOUT = 1mA (to GND)

3.5

VCC-0.2

ISCR

Receiver output short circuit

current

to GND

to VCC

tDR

Propagation delay time

CL = 150pF

(1)

0.1

0.5

μs

RS-232 in to TTL-CMOS out (from 50% to 50%)

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