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UPD4721 数据表(PDF) 1 Page - NEC

部件名 UPD4721
功能描述  RS-232 LINE DRIVER/RECEIVER AT 3.3 V/5 V
Download  16 Pages
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制造商  NEC [NEC]
网页  http://www.nec.com/
标志 NEC - NEC

UPD4721 数据表(HTML) 1 Page - NEC

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©
1993
DATA SHEET
The
µPD4721 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, realizing the allowing it to
operate with a single +3.3 V or +5 V power supply. It also provides standby function.
This IC incorporates 2 driver circuits and 2 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.
ORDERING INFORMATION
Part number
Package
µPD4721GS-GJG
20-pin plastic SSOP (300 mil)
MOS INTEGRATED CIRCUIT
µPD4721
Document No.
S12198EJ2V0DS00 (2nd edition)
(Previous No. IC-3279)
Date Published January 1997 N
Printed in Japan
RS-232 LINE DRIVER/RECEIVER AT 3.3 V/5 V


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