LTC485CJ8(RevE) Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Fabricante
LTC485CJ8 Datasheet PDF : 12 Pages
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UU
FU CTIO TABLES
LTC485 Transmitting
INPUTS
RE
DE
DI
X
1
1
X
1
0
X
0
X
X
1
X
LINE
CONDITION
No Fault
No Fault
X
Fault
OUTPUTS
B
A
0
1
1
0
Z
Z
Z
Z
LTC485 Receiving
INPUTS
RE
DE
0
0
0
0
0
0
1
0
A–B
≥ 0.2V
≤ – 0.2V
Inputs Open
X
OUTPUTS
R
1
0
1
Z
UU U
PI FU CTIO S
LTC485
PIN #
1
2
3
4
5
6
7
8
NAME
RO
RE
DE
DI
GND
A
B
VCC
DESCRIPTION
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.
Receiver Output Enable. A low enables the
receiver output, RO. A high input forces the
receiver output into a high impedance state.
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.
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.
Ground Connection.
Driver Output/Receiver Input.
Driver Output/Receiver Input.
Positive Supply; 4.75 < VCC < 5.25
TYPICAL PERFOR A CE CHARACTERISTICS
Receiver Output Low Voltage
vs Output Current
36
TA = 25°C
32
28
24
20
16
12
8
4
0
0
0.5
1.0
1.5
2.0
OUTPUT VOLTAGE (V)
LTC485 • TPC01
Receiver Output High Voltage
vs Output Current
–18
TA = 25°C
–16
–14
–12
–10
–8
–6
–4
–2
0
5
4
3
2
OUTPUT VOLTAGE (V)
LTC485 • TPC02
Receiver Output High Voltage
vs Temperature
4.8
I = 8mA
4.6
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
LTC485 • TPC03
5
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