ST75C176C datasheet(6/17 Pages) STMICROELECTRONICS

Part #	ST75C176C

Description	Low power RS-485/RS-422 transceiver

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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Electrical characteristics

ST75C176B - ST75C176C

6/17

4

Electrical characteristics

Table 6.

DC electrical characteristics

(VCC = 5 V ± 5 %, TA = TMIN to TMAX, unless otherwise specified. Typical values are referred

to TA = 25 °C) (See Note 1)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VOD1

Differential driver output

(no load)

5V

VOD2

Differential driver output

(with load)

RL = 27Ω (RS-485), (See Figure 2.)

RL = 50Ω (RS-422), (See Figure 2.)

1.5

5

V

ΔVOD

Change in magnitude of

driver differential output

voltage for complementary

output states

RL = 27Ω or 50Ω (See Figure 2.)0.2

V

VOC

Driver common-mode

output voltage

RL = 27Ω or 50Ω (See Figure 2.)3

V

ΔVOC

Change in magnitude of

driver common-mode

output voltage for

complementary output

states

RL = 27Ω or 50Ω (See Figure 2.)0.2

V

VIH

Input high voltage

RE, DE, DI

2.0

V

VIL

Input low voltage

RE, DE, DI

0.8

V

IIN1

Input current

RE, DE, DI

± 2

μA

IIN2

Input current (A, B)

VCM = 0V or 5.25V, VDE = 0V

VIN = 12V

VIN = -7V

1

-0.8

mA

VTH

Receiver differential

threshold voltage

VCM = -7 to 12V

-0.2

0.2

V

ΔVTH

Receiver input hysteresis

VCM = 0V

70

mV

VOH

Receiver output high

voltage

IO = -4mA, VID = 200mV

3.5

V

VOL

Receiver output low

voltage

IO = 4mA, VID = -200mV

0.4

V

IOZR

3-State (high impedance)

output current at receiver

VO = 0.4 to 2.4V

± 1

μA

RIN

Receiver input resistance

VCM = -7 to 12V

12

KW

ICC

No load supply current

(Note 2)

VRE = 0V or VCC

VDE = VCC

VDE = 0V

400

300

900

500

μA

IOSD1

Driver short-circuit current,

VO=High

VO = -7 to 12V (Note 3)

35

250

mA

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