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SP331 数据表(PDF) 3 Page - Exar Corporation

部件名 SP331
功能描述  Programmable Dual RS-232/RS-485 Transceiver
PDF  13 Pages
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制造商  EXAR [Exar Corporation]
网页  http://www.exar.com
标志 EXAR - Exar Corporation

SP331 数据表(HTML) 3 Page - Exar Corporation

  SP331 Datasheet HTML 1Page - Exar Corporation SP331 Datasheet HTML 2Page - Exar Corporation SP331 Datasheet HTML 3Page - Exar Corporation SP331 Datasheet HTML 4Page - Exar Corporation SP331 Datasheet HTML 5Page - Exar Corporation SP331 Datasheet HTML 6Page - Exar Corporation SP331 Datasheet HTML 7Page - Exar Corporation SP331 Datasheet HTML 8Page - Exar Corporation SP331 Datasheet HTML 9Page - Exar Corporation Next Button
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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com
SP33_00_0260
SPECIFICATIONS
PARAMETER
MIN.
TYP.
MAX.
UNITS CONDITIONS
RS-232 RECEIVER (continued)
AC Characteristics
Maximum Data Rate
20
235
kbps
Propagation Delay t
PHL
0.25

µs
Measured from 50% of V
IN to .5V
of V
OUT
Propagation Delay t
PLH
0.25

µs
RS-485 DRIVER
DC Characteristics
Open Circuit Voltage
6.0
Volts
Differential Output
.5
5.0
Volts
R
L = 54Ω, CL = 50pF
Balance
+/-0.2
Volts
|V
T| - |VT|
Common-Mode Output
3.0
Volts
Output Current
28.0
mA
R
L = 54Ω
Short Circuit Current
+/-250
mA
Terminated in -7V to +0V
AC Characteristics
Maximum Data Rate
0
Mbps R
L = 54Ω
Maximum Data Rate
8
Mbps T
A = +85°C, Note 
Output Transition Time
30
50
ns
Rise/Fall time, 0%-90%
Propagation Delay t
PHL
80
20
ns
See Figures 2 & 4, R
DIFF = 54Ω,
C
L = CL2 = 00pF
Propagation Delay t
PLH
80
20
ns
Driver Output Skew
0
20
ns
Per Figure 4, t
SKEW = |tPHL - tPLH|
RS-485 RECEIVER
DC Characteristics
Common Mode Range
-7.0
+2
Volts
Receiver Sensitivity
+/-0.2
+/-0.3
Volts
-7V ≤ V
CM ≤ +12V
Input Impedance
2
5
kΩ
-7V ≤ V
CM ≤ +12V
AC Characteristics
Maximum Data Rate
0
Mbps
Maximum Data Rate
8
Mbps T
A = +85°C, Note 
Propagation Delay t
PHL
30
200
ns
See Figures 2 & 6, R
DIFF = 54Ω,
C
L = CL2 = 00pF
Propagation Delay t
PLH
30
200
ns
Differential Receiver Skew
0
20
ns
t
SKEW = |tPHL - tPLH|, RDIFF = 54Ω,
C
L = CL2 = 00pF
ENABLE TIMINg
RS-485 DRIVER
Enable Time
(see Figures 3 and 5)
Enable to LOW
90
50
ns
C
L = 5pF, S Closed
Enable to HIGH
90
50
ns
C
L = 5pF, S2 Closed
Disable Time (see Figures 3 and 5)
Disable from LOW
80
20
ns
C
L = 5pF, S Closed
Disable from HIGH
80
20
ns
C
L = 5pF, S2 Closed
Limits are specified at T
A = 25°C and VCC = +5.0V unless otherwise noted.



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