Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Differential output voltage

(no load)

VOD1

3.3

V

Differential output voltage

VOD2

Figure 2, RL = 54 Ω

1.5

VCC

V

Figure 2, RL = 100 Ω

2

VCC

Change in magnitude of

differential output voltage

(NOTE1)

∆VOD

Figure 2, R L = 54 Ω

0.2

V

Common mode output

voltage

VOC

Figure 2, RL = 54 Ω

3

V

Change in magnitude of

common mode output

voltage (NOTE1)

∆VOC

Figure 2, R L = 54 Ω

0.2

V

Input high voltage

VIH

DE, DI, /RE

2.0

V

Input low voltage

VIL

DE, DI, /RE

0.8

V

Logic input current

IIN1

DE, DI, /RE

-2

2

μMAX/VSSA

Output short-circuit current,

short-circuit to high

IOSD1

Short-circuit to 0V~12V

250

mA

Output short-circuit current,

short-circuit to low

IOSD2

Short-circuit to -7V~0V

-250

mA

Thermal shutdown

threshold

140

°C

Thermal shutdown

hysteresis

20

°C

(unless otherwise stated VCC=3.3V±10%, Temp=TMIN~TMAX, typical value is VCC=+3.3V, Temp＝25°C)

NOTE1: ∆VOD and ∆VOC are the changes in VOD and VOC amplitude caused by a change of DI state of the input

signal.

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Input current (A, B)

I

IN2

DE = 0 V,

VCC=0 or 3.3V

VIN = 12 V

125

μMAX/VSSA

DE = 0 V,

VCC=0 or 3.3V

VIN = -7 V

-100

μMAX/VSSA

Driver electrical characteristics

Receiver electrical characteristics

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友台半导体有限公司

ST3485E

3.3V power supply, up to 256 nodes, 12Mbps half-duplex,

RS485/RS422 transceiver

UMW R