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STR485E Fiches technique(PDF) 2 Page - STMicroelectronics

No de pièce STR485E
Description  3.3 V RS485 compatible with 1.8 V I/Os and selectable speed 20 Mbps or 250kbps
PDF  26 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STR485E Fiches technique(HTML) 2 Page - STMicroelectronics

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1
Pin connections
Figure 1. Pin connections
SLR
GND
VL
R
DE
RE
D
VCC
B
A
Table 1. Pin description
Name
Pin
I/O
Description
VL
1
Logic supply
1.65 V to 3.6 V supply for logic I/O signals
R
2
Digital output
Receiver data output
DE
3
Digital input
Driver enable input:
serial resistors of 150 ohms followed by 2.5 Mohms/ GND
nRE
4
Digital input
Receiver enable input:
serial resistors of 150 ohms followed by 2.5 Mohms / VCC
D
5
Digital input
Transmission data input
GND
6
Ground
SLR
7
Digital input
Slew rate select: low = 20 Mbps, high = 250 kbps.
Default to 20 Mbps if SLR is left floating
A
8
Bus I/O
Digital bus I/O, A
B
9
Bus I/O
Digital bus I/O, B
VCC
10
Bus supply
3 V to 3.6 V supply for A and B bus lines
STR485E
Pin connections
DS13051 - Rev 3
page 2/26



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