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參數(shù)資料
| 型號： | SP491ES-L |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 7/10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(biāo)準(zhǔn)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 |
6
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (50)668-707 www.exar.com
SP490,49_0_0627
T
MINtoTMAXandVCC=5V±5%unlessotherwisenoted.
PARAMETERS
MIN.
TYP.
MAX. UNITS CONDITIONS
SP491RECEIVER
DCCharacteristics
Differential Input Threshold
-0.2
+0.2
Volts
-7V ≤ V
CM ≤ 12V
Input Hysteresis
70
mV
V
CM = 0V
Output Voltage High
3.5
Volts
I
O = -4mA, VID = +200mV
Output Voltage Low
0.4
Volts
I
O = +4mA, VID = -200mV
Three State (high impedance)
Output Current
±1
A
0.4V ≤ V
O ≤ 2.4V; REB = 5V
Input Resistance
12
15
k
-7V ≤ V
CM ≤ 12V
Input Current (A, B); V
IN = 2V
±.0
mA
DE = 0V, V
CC = 0V or 5.25V, VIN = 2V
Input Current (A, B); V
IN = -7V
-0.8
mA
DE = 0V, V
CC = 0V or 5.25V, VIN = -7V
Short-Circuit Current
85
mA
0V ≤ V
O ≤ VCC
SP491RECEIVER
ACCharacteristics
Maximum Data Rate
5
Mbps
REB = 0V
Receiver Input to Output
20
45
50
ns
t
PLH; RDIFF = 54,
C
L = CL2 = 00pF; Figures 3 & 8
Receiver Input to Output
20
45
50
ns
t
PHL; RDIFF = 54,
C
L = CL2
=
00pF; Figures 3 & 8
Diff. Receiver Skew It
PLH-tPHLI
3
ns
R
DIFF = 54; CL = CL2 = 00pF;
Figures 3 & 8
Receiver Enable to Output Low
45
70
ns
C
RL = 5pF; Figures 2 and 9; S closed
Receiver Enable to Output High
45
70
ns
C
RL = 5pF; Figures 2 and 9; S2 closed
Receiver Disable from Low
45
70
ns
C
RL = 5pF; Figures 2 and 9; S closed
Receiver Disable from High
45
70
ns
C
RL = 5pF; Figures 2 and 9; S2 closed
POWERREQUIREMENTS
Supply Voltage
+4.75
+5.25 Volts
Supply Current
900
A
REB, D = 0V or V
CC; DE = VCC
SP491ENVIRONMENTAL
ANDMECHANICAL
Operating Temperature
Commercial (C_)
0
+70
°C
Industrial (E_)
-40
+85
°C
Storage Temperature
-65
+50 °C
Package
Plastic DIP (_S)
NSOIC (_N)
Figure 9. Receiver Enable and Disable Times
ELECTRICALCHARACTERISTICS
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