ST3485EBDR datasheet(6/22 Pages) STMICROELECTRONICS

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Electrical characteristics

ST3485EB - ST3485EC

6/22

Electrical characteristics

Table 7.

Electrical characteristics

VCC = 3 V to 3.6 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred

to TA = 25 °C)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

ISUPPLY

VCC Power supply current No Load, DI=0V or VCC

DE=VCC,

RE=0V or VCC

1.3

2.2

DE=0V,

RE=0V

1.2

1.9

ISHDN

Shutdown supply current

DE=0V, RE=VCC, DI=0V or VCC

0.002

µA

Table 8.

Logic input electrical characteristics

VCC = 3 V to 3.6 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred

to TA = 25 °C)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VIL

Input logic threshold low

DE, DI, RE

1.3

0.8

VIH

Input logic threshold high

DE, DI, RE

IIN1

Logic input current

DE, DI, RE

± 2.0

µA

IIN2

Input current (A, B)

DE=0V, VCC= 0 or 3.6V

VIN=12V

VIN=-7V

-0.8

Table 9.

Transmitter electrical characteristics

VCC = 3 V to 3.6 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred

to TA = 25°C)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VOD

Differential drive output

RL= 100Ω (RS-422) (Figure 1)2

RL= 54Ω (RS-485) (Figure 1)1.5

RL= 60Ω (RS-485) (Figure 2)1.5

ΔVOD

Change in magnitude of driver

differential output voltage for

complementary output states

(Note: 1)

RL= 54Ω or 100Ω (Figure 1)0.2

VOC

Driver common mode output

voltage

RL= 54Ω or 100Ω (Figure 1)3

ΔVOC

Change in magnitude of driver

common mode output voltage

(Note: 1)

RL= 54Ω or 100Ω (Figure 1)0.2

IOSD

Driver short circuit output

current

± 250

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