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參數(shù)資料
| 型號： | LTC1484IN8#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 15/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX RS485 LOWPWR 8-DIP |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 類型： | 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 1/1 |
| 規(guī)程： | RS422，RS485 |
| 電源電壓： | 4.75 V ~ 5.25 V |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 8-DIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 8-PDIP |
| 包裝： | 管件 |
8
LTC1484
RO (Pin 1): Receiver Output. If the receiver output is en-
abled (RE low) and the part is not in shutdown, RO is high
if (A – B) > VTH(MAX) and low if (A – B) < VTH(MIN). RO is
also high if the receiver inputs are open or shorted to-
gether, with or without a termination resistor.
RE (Pin 2): Receiver Output Enabled. A high on this pin
three-states the receiver output (RO) and a low enables it.
DE (Pin 3): Driver Enable Input. DE = high enables the
output of the driver with the driver outputs determined by
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Driver Output High Voltage vs
Output Current
Driver Output Low Voltage vs
Output Current
Driver Propagation Delay vs
Temperature
Driver Short-Circuit Current vs
Temperature
Driver Skew vs Temperature
Driver Propagation Delay vs
Supply Voltage
OUTPUT CURRENT (mA)
–100 –90 –80 –70 –60 –50 –40 –30 –20 –10 0
DRIVER
OUTPUT
HIGH
VOLTAGE
(V)
1484 G31
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
VCC = 4.75V
OUTPUT CURRENT (mA)
0
10 20 30 40 50 60 70 80 90 100
DRIVER
OUTPUT
LOW
VOLTAGE
(V)
1484 G32
3.0
2.5
2.0
1.5
1.0
0.5
0
VCC = 4.75V
TEMPERATURE (
°C)
–55
DRIVER
PROPAGATION
DELAY
(ns)
1484 G33
50
45
40
35
30
25
20
15
10
5
0
VCC = 5V
tPHL
tPLH
–35 –15
5
25
45
65
85 105 125
TEMPERATURE (
°C)
–55
DRIVER
SHORT-CIRCUIT
CURRENT
(mA)
1484 G34
250
200
150
100
50
0
VCC = 5.25V
DRIVER OUTPUT HIGH
SHORT TO –7V
DRIVER OUTPUT LOW
SHORT TO 10V
–35 –15
5
25
45
65
85 105 125
TEMPERATURE (
°C)
–55
DRIVER
SKEW
(ns)
1484 G35
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
–35 –15
5
25
45
65
85 105 125
SUPPLY VOLTAGE (V)
4.5
4.75
5
5.25
5.5
DRIVER
PROPAGATION
DELAY
(ns)
1484 G36
40
35
30
25
20
15
10
5
0
TA = 25°C
tPHL
tPLH
PIN FUNCTIONS
UU
U
the DI pin. DE = low forces the driver outputs into a high
impedance state. The LTC1484 enters shutdown when
both receiver and driver outputs are disabled (RE is high
and DE is low).
DI (Pin 4): Driver Input. When the driver outputs are
enabled (DE high), DI high takes the A output high and the
B output low. DI low takes the A output low and the B
output high.
GND (Pin 5): Ground.
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