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參數(shù)資料
| 型號： | SP491ES-L |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 6/10頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX RS485 FULL DUPLEX 14PDIP |
| 產(chǎn)品變化通告： | Interface Product Discontinuation 10/May/2011 |
| 標準包裝： | 25 |
| 類型： | 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 1/1 |
| 規(guī)程： | RS485 |
| 電源電壓： | 5V |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 14-DIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 14-PDIP |
| 包裝： | 管件 |
5
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (50)668-707 www.exar.com
SP490,49_0_0627
ABSOLUTEMAXIMUMRATINGS
Thesearestressratingsonlyandfunctionaloperationofthedevice
attheseratingsoranyotherabovethoseindicatedintheoperation
sections of the specifications below is not implied. Exposure to
absolute maximum rating conditions for extended periods of time
may affect reliability.
V
CC...................................................................................................+7V
InputVoltages
Logic.................................................-0.5Vto(V
CC+0.5V)
Drivers..............................................-0.5Vto(V
CC+0.5V)
Receivers................................................................±14V
OutputVoltages
Logic................................................-0.5Vto(V
CC+0.5V)
Drivers....................................................................±14V
Receivers.........................................-0.5Vto(V
CC+0.5V)
Storage Temperature.....................................................-65C to +150
Power Dissipation.................................................................1000mW
T
MIN to TMAX and VCC = 5V ± 5% unless otherwise noted.
PARAMETERS
MIN.
TYP.
MAX. UNITS CONDITIONS
SP491DRIVER
DCCharacteristics
Differential Output Voltage
GND
V
CC
Volts
Unloaded; R = ∞ ; see figure 1
Differential Output Voltage
2
V
CC
Volts
With Load; R = 50; (RS422);
see figure 1
Differential Output Voltage
.5
V
CC
Volts
With Load; R = 27; (RS485); see
figure 1
Change in Magnitude of Driver
Differential Output Voltage for
Complimentary States
0.2
Volts
R = 27 or R = 50; see figure 1
Driver Common-Mode
Output Voltage
3
Volts
R = 27 or R = 50; see figure 1
Input High Voltage
2.0
Volts
Applies to D, REB, DE
Input Low Voltage
0.8
Volts
Applies to D, REB, DE
Input Current
±0
A
Applies to D, REB, DE
Driver Short-Circuit Current
V
OUT = HIGH
250
mA
-7V ≤ V
O ≤ 12V
V
OUT = LOW
250
mA
-7V ≤ V
O ≤ 12V
SP491DRIVER
ACCharacteristics
Maximum Data Rate
5
Mbps
REB = 5V, DE = 5V
Driver Input to Output
30
60
ns
t
PLH; RDIFF = 54, CL = CL2 = 00pF;
see figures 3 and 6
Driver Input to Output
30
60
ns
t
PHL; RDIFF = 54, CL = CL2 = 00pF;
see figures 3 and 6
Driver Skew
5
0
ns
see figures 3 and 6,
t
SKEW = | tDPLH - tDPHL |
Driver Rise or Fall Time
5
40
ns
From 0% to 90%; R
DIFF = 54,
C
L = CL2 = 00pF; see figures 3 and 6
Driver Enable to Output High
40
70
ns
C
L = CL2 = 00pF; see figures
4 and 7; S
2 closed
Driver Enable to Output Low
40
70
ns
C
L = CL2 = 00pF; see figures
4 and 7; S
closed
Driver Disable Time from Low
40
70
ns
C
L = CL2 = 00pF; see figures
4 and 7; S
closed
Driver Disable Time from High
40
70
ns
C
L = CL2 = 00pF; see figures
4 and 7; S
2 closed
ELECTRICALCHARACTERISTICS
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