SP3282 Datasheet, PDF (9/15 Pages) Sipex Corporation – Intelligent +2.35V to +5.5V RS-232 Transceivers

VCC
+
C1 _-
Figure 12. Charge Pump — Phase 2
+
C2
-
-5.5V or -4.0V
C4
+ - _{VDD Storage Capacitor}
-+
VSS Storage Capacitor
C3
Figure 13. Charge Pump — Phase 3
VCC
+
C1 _-
-VCC
+VCC
+
C2
-
-VCC
C4
+ - _{VDD Storage Capacitor}
-+
VSS Storage Capacitor
C3
VCC
+
C1 _-
+5.5V or +4.0V
C2 ⁺
-
C4
+ - _{VDD Storage Capacitor}
-+
VSS Storage Capacitor
C3
Figure 14. Charge Pump — Phase 4
Inactive Detection Block
RXINACT
RXIN
RS-232
Receiver Block
RXOUT
Figure 15. Stage I of AUTO ON-LINE^® Circuitry
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 17. AUTO ON-LINE^® Timing Waveforms
Date: 02/24/05
SP3282EB Intelligent +2.35V to +5.5V RS-232 Transceivers
9
© Copyright 2005 Sipex Corporation