SP3221E Datasheet, PDF (10/18 Pages) Sipex Corporation – Intelligent +3.0V to +5.5V RS-232 Transceiver

RECEIVER ^+2.7V
RS-232 INPUT ^0V
VOLTAGES -2.7V
VCC
STATUS
0V
+5V
DRIVER
RS-232 OUTPUT _0V
VOLTAGES
-5V
S
H
U
T
D
O
W
N
tSTSL
tSTSH
tONLINE
Figure 9. Auto-Online Timing Waveforms
V_CC = +5V
+
C_{1 –}
–5V
+5V
+
C_{2 –}
–5V
Figure 10. Charge Pump — Phase 1
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
V_CC = +5V
+
C_{1 –}
Figure 11. Charge Pump — Phase 2
+
C_{2 –}
–10V
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
Date: 7/21/04
SP3221E +3.0V to +5.5V RS-232 Transceiver
10
© Copyright 2004 Sipex Corporation