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LTC485IS8 数据表(PDF) 5 Page - Linear Technology

部件名 LTC485IS8
功能描述  Low Power RS485 Interface Transceiver
Download  12 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC485IS8 数据表(HTML) 5 Page - Linear Technology

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5
LTC485
CC
HARA TERISTICS
A
TYPICALPERFOR
CE
LTC485 Transmitting
INPUTS
OUTPUTS
RE
DE
DI
B
A
X
1
1
No Fault
0
1
X
1
0
No Fault
1
0
X0
X
X
Z
Z
X
1
X
Fault
Z
Z
LINE
CONDITION
LTC485 Receiving
INPUTS
OUTPUTS
RE
DE
A – B
R
00
≥0.2V
1
00
≤–0.2V
0
0
0
Inputs Open
1
10
X
Z
PIN #
NAME
DESCRIPTION
1
RO
Receiver Output. If the receiver output is enabled
(RE low), then if A > B by 200mV, RO will be
high. If A < B by 200mV, then RO will be low.
2
RE
Receiver Output Enable. A low enables the
receiver output, RO. A high input forces the
receiver output into a high impedance state.
3
DE
Driver Outputs Enable. A high on DE enables the
driver output. A and B, and the chip will function
as a line driver. A low input will force the driver
outputs into a high impedance state and the chip
will function as a line receiver.
4
DI
Driver Input. If the driver outputs are enabled
(DE high), then a low on DI forces the outputs A
low and B high. A high on DI with the driver
outputs enabled will force A high and B low.
5
GND
Ground Connection.
6
A
Driver Output/Receiver Input.
7
B
Driver Output/Receiver Input.
8VCC
Positive Supply; 4.75 < VCC < 5.25
PI FU CTIO S
FU CTIO TABLES
Receiver Output High Voltage
vs Output Current
Receiver Output Low Voltage
vs Output Current
OUTPUT VOLTAGE (V)
0
0
4
12
16
20
1.0
36
LTC485 • TPC01
8
0.5
2.0
24
28
32
1.5
TA = 25°C
OUTPUT VOLTAGE (V)
5
0
–2
–6
–8
–10
3
–18
LTC485 • TPC02
–4
4
–12
–14
–16
2
TA = 25°C
TEMPERATURE (°C)
–50
3.0
3.2
3.6
3.8
4.0
75
4.8
LTC485 • TPC03
3.4
0
125
4.2
4.4
4.6
–25
25
50
100
I = 8mA
Receiver Output High Voltage
vs Temperature


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