RS-422 Ver la hoja de datos (PDF) - Exar Corporation
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componentes Descripción
Fabricante
RS-422 Datasheet PDF : 23 Pages
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SP339E
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
PIN DESCRIPTIONS BY MODE (MODE1, MODE0)
Pin
Name
00, Figure 1
01, Figure 2
10, Figure 3
21
R9
R5 Input
REV. 1.0.4
11, Figure 4
22
R8
23
GND
24
R7
R4 Input
Ground
T3 Output
25
R6
26
GND
27
R4
R3 Input
Ground
T2 Output
R1 Input B
28
R3
29
GND
30
R2
T1 Output
Ground
R2 Input
R1 Input A, T1 Out A
R2 Input A
T1 Out A
31
R1
32
VCC
33
VSS
34
C2-
35
C1-
36
GND
37
C1+
38
VCC
39
C2+
40
VDD
R1 Input
R1 Input B, T1 Out B
T1 Out B
VCC - 1.0PF to ground recommended for supply decoupling
VSS - Charge pump negative supply, 0.1PF from ground
C2+ - Charge pump cap 2 negative lead
C1- - Charge pump cap 1 negative lead
Ground
C1+ - Charge pump cap 1 positive lead, 0.1PF
VCC
C2+ - Charge pump cap 2 positive lead, 0.1PF
VDD - Charge pump positive supply, 0.1PF to ground
4
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