SP332 Datasheet, PDF (6/10 Pages) Sipex Corporation – RS-232/RS-485 Multi-Mode Serial Transceiver

VCC1
5V
1µF
1µF
1µF
V.35
DX
DX
+10V
RX
RX
a) C₂₊
GND
GND
b) C_2–
–10V
RX
VCC1
1µF
1µF
1µF
RS-232
DX
DX
RX
RX
RX
RX
DX
DX
1µF
T
T
T
T
T
50Ω 125Ω
T
=
50Ω
P
TXD (103)
P
S
S
T
U
SCTE (113)
U
W
W
T
AA
TXC (114)
AA
Y
Y
T
X
RXC (115)
X
V
V
T
T
TXD (104)
T
R
R
T
B
GND (102)
B
A ^{CABLE SHIELD} A
1µF
H
C
E
D
F
NN
N
L
DTR (108)
RTS (105)
DSR (107)
CTS (106)
DCD (109)
TM (142)
RDL (140)
LLB (141)
H
C
E
D
F
NN
N
L
ISO 2593
34-PIN DTE/DCE
INTERFACE
CONNECTOR
ISO 2593
34-PIN DTE/DCE
INTERFACE
CONNECTOR
Figure 8. Charge Pump Waveforms
1µF
1µF
V.35
RX
RX
DX
DX
DX
VCC2
1µF
1µF
1µF
RS-232
RX
RX
DX
DX
DX
DX
RX
RX
VCC2
5V
1µF
V_CC = +5V
+
C_{1 –}
+10V
+
C_{2 –}
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
V_CC = +5V
+
C_{1 –}
–5V
+5V
+
C_{2 –}
–5V
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
Figure 9. Charge Pump Phase 1
Figure 10. Charge Pump Phase 2
V_CC = +5V
+
C_{1 –}
+
C_{2 –}
–10V
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
V_CC = +5V
+
C_{1 –}
–5V
+5V
+
C_{2 –}
–5V
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
Figure 11. Charge Pump Phase 3
Figure 12. Charge Pump Phase 4
TGoddard/SP332/9617R0
SP332 RS-232/RS-485 Multi-Mode Serial Transceiver
6
© Copyright 2000 Sipex Corporation