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參數(shù)資料
| 型號： | SP331ET-L/TR |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 7/13頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX RS232/485 PROG 28WSOIC |
| 標準包裝： | 1,500 |
| 類型： | 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 4/4 |
| 規(guī)程： | RS232，RS485 |
| 電源電壓： | 5V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 28-SOIC W |
| 包裝： | 帶卷 (TR) |
3
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
s
Measured from 50% of V
IN to .5V
of V
OUT
Propagation Delay t
PLH
0.25
s
RS-485 DRIVER
DC Characteristics
Open Circuit Voltage
6.0
Volts
Differential Output
.5
5.0
Volts
R
L = 54, CL = 50pF
Balance
+/-0.2
Volts
|V
T| - |VT|
Common-Mode Output
3.0
Volts
Output Current
28.0
mA
R
L = 54
Short Circuit Current
+/-250
mA
Terminated in -7V to +0V
AC Characteristics
Maximum Data Rate
0
Mbps R
L = 54
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 = 54,
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
k
-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 = 54,
C
L = CL2 = 00pF
Propagation Delay t
PLH
30
200
ns
Differential Receiver Skew
0
20
ns
t
SKEW = |tPHL - tPLH|, RDIFF = 54,
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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