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ST485ABN Datasheet(PDF) 3 Page - STMicroelectronics

No. de pieza ST485ABN
Descripción Electrónicos  Very high speed low power RS-485/RS-422 transceiver
Download  19 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST485ABN Datasheet(HTML) 3 Page - STMicroelectronics

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ST485A
Pin configuration
3/19
1
Pin configuration
Figure 1.
Pin configuration
1.1
Pin description
Table 1.
Pin description
Pin
Symbol
Name and function
1RO
Receiver output. If A>B by 200mV, RO will be high; if A<B by 200mV, RO will be
low
2RE
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.
3DE
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.
4DI
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
5
GND
Ground
6
A
Non-inverting receiver input and non-inverting driver output
7
B
Inverting receiver input and inverting driver output
8VCC
Supply voltage: VCC= 4.75V to 5.25V


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