Electrical characteristics
4
Electrical characteristics
ST75C176
Table 5.
Symbol
DC electrical characteristics
(VCC = 5V ± 5%, TA = TMIN to TMAX, unless otherwise specified. Typical values are referred
to TA = 25°C) (See Note 1)
Parameter
Test Conditions
Min. Typ. Max. Unit
VOD1
Differential driver output
(no load)
VOD2
Differential driver output
(with load)
RL = 27Ω (RS-485), (See Figure 2.)
RL = 50Ω (RS-422), (See Figure 2.)
1.5
∆VOD
Change in magnitude of
driver differential output
voltage for complementary
output states
RL = 27Ω or 50Ω (See Figure 2.)
VOC
Driver common-mode
output voltage
RL = 27Ω or 50Ω (See Figure 2.)
5
V
5
V
5
V
0.2
V
3
V
∆VOC
VIH
VIL
IIN1
IIN2
VTH
∆VTH
VOH
VOL
Change in magnitude of
driver common-mode
output voltage for
complementary output
states
RL = 27Ω or 50Ω (See Figure 2.)
Input high voltage
RE, DE, DI
Input low voltage
RE, DE, DI
Input current
RE, DE, DI
Input current (A, B)
Receiver differential
threshold voltage
VCM = 0V or 5.25V, VDE = 0V
VIN = 12V
VIN = -7V
VCM = -7 to 12V
Receiver input hysteresis
Receiver output high
voltage
VCM = 0V
IO = -4mA, VID = 200mV
Receiver output low
voltage
IO = 4mA, VID = -200mV
0.2
V
2.0
V
0.8
V
± 2 µA
1
mA
-0.8 mA
-0.2
0.2
V
70
mV
3.5
V
0.4
V
IOZR
RIN
ICC
IOSD1
3-State (high impedance)
output current at receiver
VO = 0.4 to 2.4V
Receiver input resistance VCM = -7 to 12V
No load supply current
(Note 2)
VRE = 0V or VCC
VDE = VCC
VDE = 0V
Driver short-circuit current,
VO=High
VO = -7 to 12V (Note 3)
± 1 µA
12
KW
400 900 µA
300 500 µA
35
250 mA
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