参数资料
型号: SP3494EN-L/TR
厂商: Exar Corporation
文件页数: 2/9页
文件大小: 0K
描述: IC TXRX RS485/RS422 LP 8NSOIC
标准包装: 2,500
类型: 收发器
驱动器/接收器数: 1/1
规程: RS422/RS485
电源电压: 3.3V
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOICN
包装: 带卷 (TR)
2
Exar Corporation 48720 Kato Road, Fremont CA, 94538 50-668-707 www.exar.com
SP3494_00_0702
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation
of the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may
affect reliability.
V
CC.....................................................................+6.0V
Input Voltages
Drivers.................................-0.3V to +6.0V
Receivers.........................................+/-4V
Output Voltages
Drivers.............................................+/-4V
Receivers............................-0.3V to +6.0V
Storage Temperature.......................-65C to +150C
Power Dissipation
8-pin NSOIC...................................................600mW
(derate 6.90mW/C above +70C)
ELECTRICAL CHARACTERISTICS
T
AMB = TMIN to TMAX and VCC = +3.3V +/-5% unless otherwise noted.
PARAMETERS
MIN.
TYP.
MAX.
UNITS CONDITIONS
SP3494 DRIVER
DC Characteristics
Differential Output Voltage
GND
Vcc
Volts
Unloaded; R = ∞ ; Figure 1
Differential Output Voltage
2
Vcc
Volts
With Load; R = 50 (RS-422);
Figure
Differential Output Voltage
.5
Vcc
Volts
With Load; R = 27 (RS-485);
Figure
Change in Magnitude of Driver
Differential Output Voltage for
Complimentary states
0.2
Volts
R = 27 or R = 50; Figure 1
Driver Common-Mode Output
Voltage
3
Volts
R = 27 or R = 50; Figure 1
Input High Voltage
2.0
Volts
Applies to DE, DI, RE
Input Low Voltage
0.8
Volts
Applies to DE, DI, RE
Input Current
+/-0
A
Applies to DE, DI, RE
Driver Short Circuit Current
V
OUT = HIGH
+/-250
mA
-7V ≤ V
O ≤ +12V; Figure 8
Driver Short Circuit Current
V
OUT = LOW
+/-250
mA
-7V ≤ V
O ≤ +12V; Figure 8
SP3494 DRIVER
AC Characteristics
Maximum Data Rate
2.5
Mbps
RE = V
CC, DE = VCC
Driver Input to Output, t
PLH
20
45
75
ns
Figures 2 & 9
Driver Input to Output, t
PHL
20
45
75
ns
Figures 2 & 9
Differential Driver Skew
0
ns
|t
DO- tDO2|, Figures 2 and 0
Driver Rise or Fall Time
30
70
ns
From 0%-90%; Figures 3 and 0
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