ST490ABN datasheet(3/11 Pages) STMICROELECTRONICS

3 / 11 page

ST490A

3/11

ELECTRICAL CHARACTERISTICS

VCC =4.5V to5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA =25°C)

TRANSMITTER ELECTRICAL CHARACTERISTICS

VCC = 4.5V to 5.5V, 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 No Load Supply Current

CIN

Input Capacitance

1.8

CYZ

Driver Output Capacitance

1.2

COUT

Output Capacitance

2.3

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VOD1

Differential Drive Output

(No load)

VCC

VOD2

Differential Drive Output

(With Load)

RL=54Ω (RS-422) (Figure 1)

1.5

2.6

VOD3

Differential Drive Output

(With Load)

RL= 100Ω (RS-422) (Figure 1)

∆V

Change in magnitude of

Driver Differential Output

Voltage for Complementary

Output States (Note1)

RL=54Ω or 100Ω (Figure 1)

0.2

VOC

Driver Common Mode

Output Voltage

RL=54Ω (Figure 1)

∆V

Change in magnitude of

Driver Common Mode

Output Voltage (Note1)

RL=54Ω (Figure 1)

0.2

IOFF

Power Off Output Current

VCC =0V

VO=-7V to 12V

± 100

µA

IOSD

Driver Short Circuit Output

Current

VO=-7V to 12V

± 35

± 250

VIL

Input Logic Threshold Low

0.8

VIH

Input Logic Threshold High

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