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Electrical characteristics ST75C176B - ST75C176C
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4 Electrical characteristics
Table 6. DC electrical characteristics
(V
CC
= 5 V ± 5 %, T
A
= T
MIN
to T
MAX
, unless otherwise specified. Typical values are referred
to T
A
= 25 °C) (See Note 1)
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
OD1
Differential driver output
(no load)
5V
V
OD2
Differential driver output
(with load)
R
L
= 27Ω (RS-485), (See Figure 2.)
R
L
= 50Ω (RS-422), (See Figure 2.)
1.5
5
5
V
V
ΔV
OD
Change in magnitude of
driver differential output
voltage for complementary
output states
R
L
= 27Ω or 50Ω (See Figure 2.)0.2V
V
OC
Driver common-mode
output voltage
R
L
= 27Ω or 50Ω (See Figure 2.)3V
ΔV
OC
Change in magnitude of
driver common-mode
output voltage for
complementary output
states
R
L
= 27Ω or 50Ω (See Figure 2.)0.2V
V
IH
Input high voltage RE, DE, DI 2.0 V
V
IL
Input low voltage RE, DE, DI 0.8 V
I
IN1
Input current RE, DE, DI ± 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
mA
mA
V
TH
Receiver differential
threshold voltage
V
CM
= -7 to 12V -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 V
V
OL
Receiver output low
voltage
I
O
= 4mA, V
ID
= -200mV 0.4 V
I
OZR
3-State (high impedance)
output current at receiver
V
O
= 0.4 to 2.4V ± 1 μA
R
IN
Receiver input resistance V
CM
= -7 to 12V 12 KW
I
CC
No load supply current
(Note 2)
V
RE
= 0V or V
CC
V
DE
= V
CC
V
DE
= 0V
400
300
900
500
μA
μA
I
OSD1
Driver short-circuit current,
V
O
=High
V
O
= -7 to 12V (Note 3) 35 250 mA
