SP504 查看數據表（PDF） - Exar Corporation
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SP504 Datasheet PDF : 32 Pages
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RECEIVER INPUT GRAPHS
RS-422 RECEIVER
+3.25mA
RS-423 RECEIVER
+3.25mA
-10V
-3V
-3.25mA
-10V
-3V
+3V
+10V
Maximum Input Current
Versus Voltage
-3.25mA
RS-485 RECEIVER
+1.0mA
+3V
+10V
Maximum Input Current
Versus Voltage
-7V
-3V
-0.6mA
+6V +12V
1 Unit Load
Maximum Input Current
Versus Voltage
OTHER AC CHARACTERISTICS
TA = +70°C to 0°C and VCC = +4.75V to +5.25V unless otherwise noted.
PARAMETER
MIN.
TYP.
MAX. UNITS CONDITIONS
DRIVER DELAY TIME BETWEEN ACTIVE MODE AND TRI-STATE MODE
RS-232 Mode
tPZL; Tri-state to Output LOW
tPZH; Tri-state to Output HIGH
tPLZ; Output LOW to Tri-state
tPHZ; Output HIGH to Tri-state
RS-423 MODE
0.70
5.0
0.40
2.0
0.20
2.0
0.40
2.0
µs CL = 100pF, Fig. 4 ; S1 closed
µs CL = 100pF, Fig. 4 ; S2 closed
µs CL = 100pF, Fig. 4 ; S1 closed
µs CL = 100pF, Fig. 4 ; S2 closed
tPZL; Tri-state to Output LOW
tPZH; Tri-state to Output HIGH
tPLZ; Output LOW to Tri-state
tPHZ; Output HIGH to Tri-state
RS-422, RS-485 MODES
0.15
2.0
0.20
2.0
0.20
2.0
0.15
2.0
µs CL = 100pF, Fig. 4 ; S1 closed
µs CL = 100pF, Fig. 4 ; S2 closed
µs CL = 100pF, Fig. 4 ; S1 closed
µs CL = 100pF, Fig. 4 ; S2 closed
tPZL; Tri-state to Output LOW
tPZH; Tri-state to Output HIGH
tPLZ; Output LOW to Tri-state
tPHZ; Output HIGH to Tri-state
V.35 MODE
2.80
10.0
0.10
2.0
0.10
2.0
0.10
2.0
µs CL = 100pF, Fig. 4 & 6; S1 closed
µs CL = 100pF, Fig. 4 & 6; S2 closed
µs CL = 15pF, Fig. 4 & 6; S1 closed
µs CL = 15pF, Fig. 4 & 6; S2 closed
tPZL; Tri-state to Output LOW
2.60
10.0
µs CL = 100pF, Fig. 4 & 6; S1 closed
tPZH; Tri-state to Output HIGH
0.10
2.0
µs CL = 100pF, Fig. 4 & 6; S2 closed
tPLZ; Output LOW to Tri-state
0.10
2.0
µs CL = 15pF, Fig. 4 & 6; S1 closed
tPHZ; Output HIGH to Tri-state
0.15
2.0
µs CL = 15pF, Fig. 4 & 6; S2 closed
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP504_102_121708
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