XR34350 Datasheet, PDF (8/20 Pages) Exar Corporation – Internal Termination and Wide Output Swing

XR34350
Pin Functions (Continued)
Pin Number Pin Name
21
R9
22
R8
23
GND
24
R7
25
R6
26
GND
27
R4
28
R3
29
GND
30
R2
31
R1
32
VCC
33
VSS
34
C2-
35
C1-
36
GND
37
C1+
38
VCC
39
C2+
40
VDD
Descriptions by Mode (MODE1, MODE0)
Mode 00, Figure 2
Mode 01, Figure 3
Mode 10, Figure 4
Mode 11, Figure 5
R5 input
R4 input
Ground
T3 output
R3 input
Ground
T2 output
T1 output
Ground
R2 input
R1 input A, T1 output A
R1 input
R1 input B, T1 output B
Supply voltage, 1.0µF to ground recommended for supply decoupling
Charge pump negative supply (V-), 0.1µF from ground
Charge pump cap 2 negative lead
Charge pump cap 1 negative lead
Ground
Charge pump cap 1 positive lead, 0.1µF
V_CC
Charge pump cap 2 positive lead, 0.1µF
Charge pump positive supply (V+), 0.1µF to ground
R1 input B
R2 input A
T1 output A
T1 output B
Suggested DB9 Connector Pinout
DB9 Pin
RS-232
RS-485/RS-422
Full Duplex
1
DCD
TX-
2
RXD
TX+
3
TXD
RX+
4
DTR
RX-
5
Ground
6
DSR
7
RTS
8
CTS
9
RI
RS-485
Half Duplex
Data-
Data+
REV1B
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