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D4723GS Schematic ( PDF Datasheet ) - NEC

Teilenummer D4723GS
Beschreibung UPD4723GS
Hersteller NEC
Logo NEC Logo 




Gesamt 16 Seiten
D4723GS Datasheet, Funktion
DATA SHEET
MOS INTEGRATED CIRCUIT
µPD4723
RS-232 LINE DRIVER/RECEIVER AT 3.3 V/5 V
The µPD4723 is a high-breakdown voltage silicon gate CMOS line driver/receiver based on the EIA/TIA-232-E
standard. The internal DC/DC converter can switch between multiple voltages, allowing it to operate with a single
+3.3 V or +5 V power supply. It also provides standby function.
This IC incorporates 3 driver circuits and 3 receiver circuits. An RS-232 interface circuit can be easily configured
by connecting 5 capacitors externally.
Features
• Conforms to EIA/TIA-232-E (former name, RS-232C) standards
• Selectable +3.3 V/+5 V single power supply (selected by VCHA pin)
• By setting the standby pin to a low level (standby mode), circuit current can be reduced. At such times,
the driver output is in a high-impedance state.
• Even in the standby mode, 2 receiver circuits can operate as inverters without hysteresis width.
The other circuit is fixed at a high level.
Ordering Information
Part number
µPD4723GS-GJG
Package
30-pin plastic SSOP (300 mil)
Document No. S12200EJ2V0DS00 (2nd edition)
(Previous No. IC-3284)
Date Published January 1997 N
Printed in Japan
©
1993
Free Datasheet http://www.datasheet4u.com/






D4723GS Datasheet, Funktion
Note 8. Measuring point
5V
STBY
0V
3.3 V
VCHA
0V
5V
VCC
3.3 V
0.6 V
tSCH
3.3 V
0.6 V
tCHS
2.4 V
0.6 V
tSC tCS
4.5 V
3.6 V
µPD4723
0.6 V
tSCH
0.6 V
tCHS
2.4 V
0.6 V
tSC
tCS
4.5 V
3.6 V
6
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D4723GS pdf, datenblatt
Note 16. Measuring point
VCC
STBY
0V
VOH
0.6 V
tDAH
2.4 V
tDHA
ROUT
VOL
2.0 V
0.8 V
Receiver outputs are indefinite during transition time (tDHA).
Note 17. Measuring point
3.3 V
VCC
3.0 V
0V
VOH
tPRA
ROUT
VOL
0.8 V
Receiver outputs are indefinite during reset release time (tPRA).
Note 18. Measuring point
5V
VCC
4.5 V
0V
VOH
ROUT
VOL
tPRA
0.8 V
Receiver outputs are indefinite during reset release time (tPRA).
REFERENCE MATERIAL
• IC PACKAGE MANUAL (C10943X)
• NEC SEMICONDUCTOR DEVICE RELIABILITY/QUALITY (IEI-1212)
12
µPD4723
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