SP339E
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
PIN DESCRIPTIONS BY MODE (MODE1, MODE0)
REV. 1.0.3
Pin
Name
00, Figure 1
01, Figure 2
10, Figure 3
11, Figure 4
21
22
23
24
25
26
R9
R8
GND
R7
R6
GND
R5 Input
R4 Input
T3 Output
R3 Input
Ground
Ground
27
28
29
R4
R3
GND
T2 Output
T1 Output
Ground
R1 Input B
R2 Input A
30
31
R2
R1
R2 Input
R1 Input
R1 Input A, T1 Out A
R1 Input B, T1 Out B
T1 Out A
T1 Out B
32
33
34
35
36
37
38
39
40
VCC
VSS
C2-
C1-
GND
C1+
VCC
C2+
VDD
V CC - 1.0 F to ground recommended for supply decoupling
V SS - Charge pump negative supply, 0.1 F from ground
C 2+ - Charge pump cap 2 negative lead
C 1- - Charge pump cap 1 negative lead
Ground
C 1+ - Charge pump cap 1 positive lead, 0.1 F
V CC
C 2+ - Charge pump cap 2 positive lead, 0.1 F
V DD - Charge pump positive supply, 0.1 F to ground
4
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