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參數(shù)資料
| 型號(hào)： | SP3491EN-L/TR |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 5/12頁 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS485 FULL DUPLX 14NSOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 收發(fā)器 |
| 驅(qū)動(dòng)器/接收器數(shù)： | 1/1 |
| 規(guī)程： | RS485 |
| 電源電壓： | 3.3V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-SOIC（窄型） |
| 包裝： | 帶卷 (TR) |
2
Exar Corporation 48720 Kato Road, Fremont CA, 94538 50-668-707 www.exar.com
SP3490_349_02_0270
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
Logic....................................-0.3V to +6.0V
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)
4-pin NSOIC.................................................700mW
(derate 8.33mW/C above +70C)
ELECTRICAL CHARACTERISTICS
T
AMB = TMIN to TMAX and VCC = +3.3V +/-5% unless otherwise noted.
PARAMETERS
MIN.
TYP.
MAX.
UNITS CONDITIONS
SP3490 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
Input Low Voltage
0.8
Volts
Input Current
+/-0
A
Driver Short Circuit Current
V
OUT = HIGH
+/-250
mA
-7V ≤ V
O ≤ +12V; Figure 8
V
OUT = LOW
+/-250
mA
-7V ≤ V
O ≤ +12V; Figure 8
SP3490 DRIVER
AC Characteristics
Max. Transmission Rate
0
Mbps
Driver Input to Output, t
PLH
20
40
60
ns
R = 27, Figures 2 & 9
Driver Input to Output, t
PHL
20
40
60
ns
R = 27, Figures 2 & 9
Differential Driver Skew
2
ns
|t
PHL(Y)- tPLH(Y)|, |tPHL(Z)- tPLH(Z)|,
Figures 2 and 9
Driver Rise or Fall Time
5
20
ns
From 0%-90%; Figures 3 and 0
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