SP485CS-L Ver la hoja de datos (PDF) - Exar Corporation
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SP485CS-L Datasheet PDF : 11 Pages
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TMIN to TMAX and VCC = 5V +/-5% unless otherwise noted.
PARAMETERS
MIN.
SP485 DRIVER (continued)
AC Characteristics
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from High
Driver Disable Time from Low
SP483/SP485 RECEIVER
DC Characteristics
Differential Input Threshold
-0.2
Input Hysteresis
Output Voltage High
2.4
Output Voltage Low
0.0
Three-State ( High Impedance)
Output Current
Input Resistance
12
Input Current (A, B); VIN = 12V
Input Current (A, B); VIN = -7V
Short-Circuit Current
SP485 RECEIVER
AC Characteristics
Maximum Data Rate
5
Receiver Input to Output
20
Receiver Input to Output
20
Differential Receiver Skew
|tPHL - tPLH|
Receiver Enable to Output Low
Receiver Enable to Output High
Receiver Disable from LOW
Receiver Disable from High
TYP.
40
40
40
40
10
15
45
45
13
45
45
45
45
ELECTRICAL CHARACTERISTICS
MAX. UNITS CONDITIONS
70
ns CL = 100pF, see figures 4 and 6,
S2 closed
70
ns CL = 100pF, see figures 4 and 6,
S1 closed
70
ns CL = 15pF, see figures 2 and 8,
S2 closed
70
ns CL = 15pF, see figures 2 and 8,
S1 closed
+0.2
5
0.4
+/-1
+1.0
-0.8
95
Volts
mV
Volts
Volts
µA
-7V ≤ VCM ≤ +12V
VCM = 0V
IO = -4mA, VID = +200mV
IO = +4mA, VID = -200mV
0.4V ≤ VO ≤ 2.4V; RE = 5V
kΩ -7V ≤ VCM ≤ +12V
mA DE = 0V, VCC = 0V or 5.25V,
VIN = 12V
mA DE = 0V, VCC = 0V or 5.25V,
VIN = -7V
mA 0V ≤ VCM ≤ VCC
Mbps RE = 0V, DE = 0V
200
ns tPLH ; Figures 3 and 7,
RDIFF = 54Ω, CL1 = CL2 = 100pF
200
ns tPHL ; Figures 3 and 7,
RDIFF = 54Ω, CL1 = CL2 = 100pF
ns RDIFF = 54Ω, CL1 = CL2 = 100pF,
Figures 3 and 7
70
ns CRL = 15pF, Figures 2 and 8;
S1 Closed
70
ns CRL = 15pF, Figures 2 and 8;
S2 Closed
70
ns CRL = 15pF, Figures 2 and 8;
S1 Closed
70
ns CRL = 15pF, Figures 2 and 8;
S2 Closed
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP483_SP485_101_062711
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