UTRS485

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

4 of 8

www.unisonic.com.tw

QW-R113-011.c



ABSOLUTE MAXIMUM RATING

PARAMETER

SYMBOL

RATINGS

UNIT

Supply Voltage

12

V

Control Input Voltage ( RE , DE)

V

Driver Input Voltage (DI)

DI

V

Driver Output Voltage (A, B)

-8~+12.5

V

Receiver Input Voltage (A, B)

-8~+12.5

V

Receiver Output Voltage (RO)

V

Continuous Power Dissipation

Derate 5.88mW/°C above +70°C

471

mW

Lead Temperature (Soldering, 10sec)

+300

°C

Operating Temperature Ranges

-40~+85

°C

Storage Temperature Range

-65~+160

°C

Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.



DC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX UNIT

Differential Driver Output

(No Load)

5.0

V

R=50Ω (RS-422)

2.0

V

Differential Driver Output

(with Load)

Fig.1, R=27Ω (RS-485)

1.5

5

V

Change in Magnitude of Driver

Differential Output Voltage for

Complementary Output States

Fig.1, R=27Ω or 50Ω

0.2

V

Driver Common-Mode Output

Voltage

Fig.1, R=27Ω or 50Ω

3.0

V

Change in Magnitude of Driver

Common-Mode Output Voltage

for Complementary Output

States

Fig.1, R=27Ω or 50Ω

0.2

V

Input High Voltage

DE, DI, RE

2.0

V

Input Low Voltage

DE, DI, RE

0.8

V

Input Current

DE, DI, RE

±2.0

µA

1.0

mA

Input Current (A, B)

DE=0V;

-0.8

mA

Receiver Differential Threshold

Voltage

-0.2

0.2

V

Receiver Input Hysteresis

70

mV

Receiver Output High Voltage

3.5

V

Receiver Output Low Voltage

0.5

V

Three-State (High Impedance)

Output Current at Receiver

±1.0

µA

Receiver Input Resistance

12

kΩ

500

900

µA

No-Load Supply Current

(Note 3)

RE

DE=0V

300

500

µA

Driver Short-Circuit Current,

35

250

mA

Driver Short-Circuit Current,

35

250

mA

Receiver Short-Circuit Current

7

95

mA