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ST3485ECN データシート(PDF) 7 Page - STMicroelectronics

部品番号 ST3485ECN
部品情報  3.3 V powered, 15 kV ESD protected, up to 12 Mbps RS-485/RS-422 transceiver
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST3485ECN データシート(HTML) 7 Page - STMicroelectronics

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ST3485EB - ST3485EC
Electrical characteristics
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Table 10.
Receiver electrical characteristics
VCC = 3 V to 3.6 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred
to TA = 25°C)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VTH
Receiver differential
threshold voltage
VCM = -7V to 12V, DE = 0
-0.2
0.2
V
ΔVTH
Receiver input hysteresis
VCM = 0V
70
V
VOH
Receiver output high
voltage
IOUT = -4mA, VID = 200mV
(Figure 8 and Figure 9)
2V
VOL
Receiver output low
voltage
IOUT = 4mA, VID = -200mV, (Figure 3)0.4
V
IOZR
3-State (high impedance)
output current at receiver
VCC = 3.6V, VO = 0V to VCC
± 1µA
RRIN
Receiver input resistance
VCM = -7V to 12V
24
k
Ω
IOSR
Receiver short-circuit
current
VRO = 0V to VCC
760
mA
Table 11.
Driver switching characteristics
VCC = 3 V to 3.6 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred
to TA = 25 °C)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
DR
Maximum data rate
12
15
Mbps
tDD
Differential output delay
RL= 60Ω, CL = 15pF, (Figure 4 and
Figure 5)
18
30
ns
tTD
Differential output
transition time
RL= 60Ω, CL = 15pF, (Figure 4 and
Figure 5)
12
20
ns
tPLH
tPHL
Propagation delay
RL= 27Ω, CL = 15pF, (Figure 8 and
Figure 9)
18
30
ns
tPDS
|tPLH - tPHL| Propagation
delay skew (Note 2)
RL= 27Ω, CL = 15pF, (Figure 8 and
Figure 9)
25
ns
tPZL
Output enable time
RL= 110Ω, (Figure 10 and Figure 11)19
35
ns
tPZH
Output enable time
RL= 110Ω, (Figure 6 and Figure 7)30
50
ns
tPHZ
Output disable time
RL= 110Ω, (Figure 6 and Figure 7)19
35
ns
tPLZ
Output disable time
RL= 110Ω, (Figure 10 and Figure 11)30
50
ns
tSKEW
Differential output delay
skew
13
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


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