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PDF UPD4724 Data sheet ( Hoja de datos )
| Número de pieza | UPD4724 | |
| Descripción | RS-232 LINE DRIVER/RECEIVER AT 3.3 V/5 V | |
| Fabricantes | NEC | |
| Logotipo |  |
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DATA SHEET
MOS INTEGRATED CIRCUIT
µPD4724
RS-232 LINE DRIVER/RECEIVER AT 3.3 V/5 V
The µPD4724 is a high breakdown voltage silicon gate CMOS line driver/receiver based on the EIA/TIA-232-E
standard. This IC features various functions, such as standby, and incorporates a DC/DC converter that switches boost
multiples, enabling operation at both +3.3 V and +5 V single supply voltage.
The µPD4724 incorporates three drivers and five receivers, so an RS-232 interface circuit can be easily constructed
by connecting five external capacitors.
FEATURES
• Based on EIA/TIA-232-E (RS-232-C) standard.
• Single power supply: +3.3 V or +5 V (selectable with the VCHA pin)
• Standby mode: Setting the standby pin to low level switches this IC into the standby mode and makes
the driver outputs high-impedance.
• Enable mode: When the enable pin is high level during the standby mode, two receivers can operate as inverters
without hysteresis width (The other three receivers are fixed to high level).
ORDERING INFORMATION
Part number
µPD4724GS-GJG
Package
30-pin plastic shrink SOP (300 mil)
Document No. S12201EJ2V0DS00 (2nd edition)
(Previous No. IC-3228)
Date Published January 1997 N
Printed in Japan
© 1993
1 page  
µPD4724
ELECTRICAL SPECIFICATIONS FOR THE IC AS A WHOLE
(TA = –40 to +85 °C and C1 to C5 = 1 µF Unless Otherwise Specified)
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
Test Conditions
VCC = +3.3 V, unloaded, RIN pin is open,
STBY = H
ICC1
VCC = +5.0 V, unloaded, RIN pin is open,
STBY = H
VCC = +3.3 V, RL = 3 kΩ(DOUT), DIN = GND,
RIN and ROUT pins are open, STBY = H
ICC2
VCC = +5.0 V, RL = 3 kΩ(DOUT), DIN = GND,
RIN and ROUT pins are 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 OPEN, STBY = L, EN = L
ICC3
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 OPEN, STBY = L, EN = H
ICC4
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
VCC = +3.0 to +5.5 V, STBY, VCHA, and
VIH EN pins
VCC = +3.0 to +5.5 V, STBY, VCHA, and
VIL EN pins
VCC = +5.5 V, VI = +5.5 V, STBY, VCHA, and
IIH EN pins
VCC = +5.5 V, VI = 0 V, STBY, VCHA, and
IIL EN pins
Driver and receiver inputs, VCC = +3.3
V, to GND, f = 1 MHz
CIN
Driver and receiver inputs, VCC = +5.0
V, to GND, f = 1 MHz
tSCH VCC = +3.0 to +5.5 V, STBY ↓ → VCHA Note
tCHS VCC = +3.0 to +5.5 V, VCHA → STBY ↑ Note
tSC VCC = +3.0 to +5.5 V, STBY ↓ → VCC Note
tCS VCC = +3.0 to +5.5 V, VCC → STBY ↑ Note
MIN.
2.4
1
1
1
1
TYP. MAX.
7.5 15
5.5 11
25 35
19 28
13
5
25
10
13
5
25
10
0.6
1
–1
10
10
Unit
mA
mA
mA
mA
µA
µA
µA
µA
µA
µA
µA
µA
V
V
µA
µA
pF
pF
µs
µs
µs
µs
Remark TYP. values are valid only at TA = 25 °C and should be used for reference only.
5
5 Page 
µPD4724
Note 2 Test points for tPHL, tPLH
+3 V
RIN 0 V
–3 V
VOH
ROUT
VOL
Note 3 Test points for tPHA, tPAH
VCC
EN
0V
VOH
ROUT
VOL
Note 4 Test points for tDAH, tDHA
VCC
STBY
0V
ROUT
VOH
VOL
0.7 V
tPLH
2.0 V
2.4 V
tPHA
0.8 V
0.6 V
tDAH
2.0 V
Receiver outputs are indefinite during transition time (tDHA).
2.7 V
tPHL
0.8 V
0.6 V
tPAH
2.0 V
2.4 V
tDHA
0.8 V
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet UPD4724.PDF ] | |
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