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PDF UPD4723 Data sheet ( Hoja de datos )
| Número de pieza | UPD4723 | |
| Descripción | RS-232 LINE DRIVER/RECEIVER AT 3.3 V/5 V | |
| Fabricantes | NEC | |
| Logotipo |  |
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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
1 page  
µPD4723
ELECTRICAL SPECIFICATIONS (TOTAL)
(UNLESS OTHERWISE SPECIFIED, TA = –40 to +85 °C, C1 to C5 = 1 µF)
Parameter
Circuit Current
Circuit Current
Circuit Current at Standby
(Standby Mode 1)
Circuit Current at Standby
(Standby Mode 2)
High-Level Input Voltage
Low-Level Input Voltage
High-Level Input Current
Low-Level Input Current
Input Capacitance
STBY — VCHA Time
VCHA — STBY Time
STBY — VCC Time
VCC — STBY Time
Symbol
Conditions
VCC = +3.3 V, No load, RIN pin OPEN,
STBY = H
ICC1
VCC = +5.0 V, No load, RIN pin OPEN,
STBY = H
VCC = +3.3 V, RL = 3 kΩ (DOUT), DIN = GND,
RIN, ROUT pin OPEN, STBY = H
ICC2
VCC = +5.0 V,RL = 3 kΩ (DOUT), DIN = GND,
RIN, ROUT pin OPEN, STBY = H
VCC = +3.3 V, No load, DIN and RIN pins are
OPEN, STBY = L, EN = L, TA = 25 °C
VCC = +3.3 V, No load, DIN and RIN pins are
ICC3 OPEN, STBY = L, EN = L
VCC = +5.0 V, No load, DIN and RIN pins are
OPEN, STBY = L, EN = L, TA = 25 °C
VCC = +5.0 V, No load, DIN and RIN pins are
OPEN, STBY = L, EN = L
VCC = +3.3 V, No load, DIN and RIN pins are
OPEN, STBY = L, EN = H, TA = 25 °C
VCC = +3.3 V, No load, DIN and RIN pins are
ICC4 OPEN, STBY = L, EN = H
VCC = +5.0 V, No load, DIN and RIN pins are
OPEN, STBY = L, EN = H, TA = 25 °C
VCC = +5.0 V, No load, DIN and RIN pins are
OPEN, STBY = L, EN = H
VIH VCC = +3.0 to +5.5 V, STBY, VCHA, EN pin
VIL VCC = +3.0 to +5.5 V, STBY, VCHA, EN pin
IIH VCC = +5.5 V, VI = 5.5 V, STBY, VCHA, EN pin
IIL VCC = +5.5 V, VI = 0 V, STBY, VCHA, EN pin
Driver input and receiver input
VCC = +3.3 V, for GND, f = 1 MHz
CIN
Driver input and receiver input
VCC = +5.0 V, for GND, f = 1 MHz
tSCH VCC = +3.0 to 5.5 V, STBY ↓ → VCHA,Note 8
tCHS VCC = +3.0 to 5.5 V, VCHA → STBY ↑,Note 8
tSC VCC = +3.0 to 5.5 V, STBY ↓ → VCC,Note 8
tCS VCC = +3.0 to 5.5 V, VCC → STBY ↑,Note 8
* The TYP. values are for reference at TA = 25 °C.
MIN. TYP. MAX. Unit
14 mA
10 mA
35 mA
28 mA
1 3 µA
5 µA
2 5 µA
10 µA
1 3 µA
5 µA
2 5 µA
10 µA
2.4 V
0.6 V
1 µA
–1 µA
10 pF
10 pF
1 µs
1 µs
1 µs
1 µs
5
5 Page 
Note 13. Measuring point
+3 V
RIN
0V
–3 V
VOH
ROUT
VOL
0.7 V
tPLH
2.0 V
Note 14. Measuring point
+3 V
RIN
0V
–3 V
VOH
ROUT
VOL
0.7 V
tPLH
2.0 V
Note 15. Measuring point
VCC
EN
0V
VOH
ROUT
VOL
STBY = L
2.4 V
tPHA
0.8 V
µPD4723
2.7 V
tPHL
0.8 V
2.7 V
tPHL
0.8 V
0.6 V
tPAH
2.0 V
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet UPD4723.PDF ] | |
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