ST1480A Просмотр технического описания (PDF) - STMicroelectronics
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ST1480A
STMicroelectronics
ST1480A Datasheet PDF : 16 Pages
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ST1480A
PIN CONFIGURATION
PIN DESCRIPTION
PlN N°
SYMBOL
1
RO
2
RE
3
DE
4
DI
5
GND
6
A
7
B
8
VCC
NAME AND FUNCTION
Receiver Output. If A>B by 200mV, RO will be high; if A<B by 200mV, RO will be
low
Receiver Output Enable. RO is enabled when RE is low; RO is high impedance
when RE is high. If RE is high and DE is low, the device will enter a low power
shutdown mode.
Driver Output Enable. The driver outputs are enabled by bringing DE high. They
are high impedance when DE is low. If RE is high DE is low, the device will enter a
low-power shutdown mode. If the driver outputs are enabled, the part functions as
line driver, while they are high impedance, it functions as line receivers if RE is
low.
Driver Input. A low on DI forces output A low and output B high. Similarly, a high
on DI forces output A high and output B low
Ground
Non-inverting Receiver Input and Non-inverting Driver Output
Inverting Receiver Input and Inverting Driver Output
Supply Voltage: VCC= 3V to 3.6V
TRUTH TABLE (DRIVER)
INPUTS
OUTPUTS
RE DE DI
B
A
X
H
H
L
H
X
H
L
H
L
L
L
X
Z
Z
H
L
X
Z
Z
X= Don’t Care; Z=High Impedance
MODE
Normal
Normal
Normal
Shutdown
TRUTH TABLE (RECEIVER)
INPUTS
OUTPUT
RE DE
A-B
RO
LL
≥ -0.015V
H
LL
≤ -0.2V
L
L L Inputs Open
H
L L Inputs Shorted
H
HL
X
Z
X= Don’t Care; Z=High Impedance
MODE
Normal
Normal
Normal
Normal
Shutdown
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