ST3485E Просмотр технического описания (PDF) - STMicroelectronics
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ST3485E Datasheet PDF : 22 Pages
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ST3485E
Electrical characteristics
Table 9.
Symbol
Receiver electrical characteristics
VCC = 3V to 3.6V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred
to Ta = 25°C)
Parameter
Test Conditions
Min. Typ. Max. Unit
VTH
Receiver differential
threshold voltage
VCM = -7V to 12V, DE = 0
-0.2
0.2
V
∆VTH
VOH
Receiver input hysteresis
Receiver output high
voltage
VCM = 0V
IOUT = -4mA, VID = 200mV
(Figure 8. and Figure 9.)
70
V
2
V
VOL
Receiver output low
voltage
IOUT = 4mA, VID = -200mV, (Figure 3.)
0.4
V
IOZR
3-State (high impedance)
output current at receiver
VCC = 3.6VVO = 0V to VCC
± 1 µA
RRIN
IOSR
Receiver input resistance
Receiver short-circuit
current
VCM = -7V to 12V
VRO = 0V to VCC
24
KΩ
7
60 mA
Table 10.
Symbol
Driver switching characteristics
VCC = 3V to 3.6V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred
to Ta = 25°C)
Parameter
Test Conditions
Min. Typ. Max. Unit
DR
Maximum data rate
tDD
Differential output delay
RL= 60Ω, CL = 15pF, (Figure 4. and
Figure 5.)
12 15
Mbps
18
30
ns
tTD
Differential output
transition time
RL= 60Ω, CL = 15pF, (Figure 4. and
Figure 5.)
12
20
ns
tPLH
tPHL
tPDS
Propagation delay
|tPLH - tPHL| Propagation
delay skew (Note 2)
RL= 27Ω, CL = 15pF, (Figure 8. and
Figure 9.)
RL= 27Ω, CL = 15pF, (Figure 8. and
Figure 9.)
18
30
ns
2
5
ns
tPZL
tPZH
tPHZ
tPLZ
tSKEW
Output enable time
Output enable time
Output disable time
Output disable time
Differential output delay
skew
RL= 110Ω, (Figure 10. and Figure 11.)
RL= 110Ω, (Figure 6. and Figure 7.)
RL= 110Ω, (Figure 6. and Figure 7.)
RL= 110Ω, (Figure 10. and Figure 11.)
19
35
ns
30
50
ns
19
35
ns
30
50
ns
1
3
ns
tZH(SHDN)
Driver enable from
shutdown to output high
30
50
ns
tZL(SHDN)
Driver enable from
shutdown to output low
19
35
ns
7/22
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