STMicroelectronics ST485CDR Linear IC ST485CDR Fiche De Données

6/19

 

V

CC

 = 5 V ± 5 %, T

A

 = T

MIN

 to T

MAX

, unless otherwise specified. Typical values are referred 

to T

A

 = 25 °C

         

V

OD1

Differential driver output 
(no load)

5

5

V

V

OD2

Differential driver output 
(with load)

R

L

 = 27

Ω (RS-485) 

 

R

L

 = 50

Ω (RS-422) 

1.5

5
5

1.4

5
5

V
V

ΔV

OD

Change in magnitude of 
driver differential output 
voltage for complementary 
output states 

R

L

 = 27

Ω or 50Ω 

0.2

0.2

V

V

OC

Driver common-mode 
output voltage

R

L

 = 27

Ω or 50Ω 

3

3

V

ΔV

OC

Change in magnitude of 
driver common-mode 
output voltage for 
complementary output 
states

R

L

 = 27

Ω or 50Ω 

0.2

0.2

V

V

IH

Input high voltage

RE, DE, DI 

2.0

2.0

V

V

IL

Input low voltage

RE, DE, DI

0.8

0.8

V

I

IN1

Input current

RE, DE, DI

± 2

± 2

µA

I

IN2

Input current (A, B)

V

CM

 = 0V or 5.25V, V

DE

 = 0V 

V

IN

 = 12V

V

IN

 = -7V

1

-0.8

1

-0.8

mA
mA

V

TH

Receiver differential 
threshold voltage

V

CM

 = -7 to 12V

-0.2

0.2

-0.2

0.2

V

ΔV

TH

Receiver input hysteresis

V

CM

 = 0V

70

mV

V

OH

Receiver output high 
voltage

I

O

 = -4mA, V

ID

 = 200mV

3.5

3.4

V

V

OL

Receiver output low 
voltage

I

O

 = 4mA, V

ID

 = -200mV

0.4

0.55

V

I

OZR

3-state (high impedance) 
output current at receiver

V

O

 = 0.4 to 2.4V

± 1

± 1

µA

R

IN

Receiver input resistance

V

CM

 = -7 to 12V

24

24

k

Ω

I

CC

No load supply current 

(2)

V

RE

 = 0V or V

CC

V

DE

 = V

CC

V

DE

 = 0V

400
300

900
500

900
500

µA
µA