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UPD4721 Datasheet(PDF) 4 Page - NEC

Part # UPD4721
Description  RS-232 LINE DRIVER/RECEIVER AT 3.3 V/5 V
PDF  16 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD4721 Datasheet(HTML) 4 Page - NEC

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4
µPD4721
ABSOLUTE MAXIMUM RATINGS (TA = 25
°C)
Parameter
Symbol
Ratings
Unit
Supply Voltage (VCHA = L)
VCC
–0.5 to +7.0
V
Supply Voltage (VCHA = H)
VCC
–0.5 to +4.5
V
Driver Input Voltage
DIN
–0.5 to VCC +0.5
V
Receiver Input Voltage
RIN
–30.0 to +30.0
V
Control Input Voltage (STBY, VCHA)VIN
–0.5 to VCC +0.5
V
Driver Output Voltage
DOUT
–25.0 to +25.0 Note 6
V
Receiver Output Voltage
ROUT
–0.5 to VCC +0.5
V
Input Current (DIN, STBY, VCHA)IIN
±20.0
mA
Operating Ambient Temperature
TA
–40 to +85
°C
Storage Temperature
Tstg
–55 to +150
°C
Total Power Dissipation
PT
0.5
W
Note 6. Pulse width = 1 ms, duty = 10 % MAX.
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
MIN.
TYP.
MAX.
Unit
Supply Voltage (VCHA = L, 5 V mode)
VCC
4.5
5.0
5.5
V
Supply Voltage (VCHA = H, 3 V mode)
VCC
3.0
3.3
3.6
V
High-Level Input Voltage (DIN)VIH
2.0
VCC
V
Low-Level Input Voltage (DIN)VIL
0
0.8
V
High-Level Input Voltage (STBY, VCHA)VIH
2.4
VCC
V
Low-Level Input Voltage (STBY, VCHA)VIL
0
0.6
V
Receiver Input Voltage
RIN
–30
+30
V
Operating Ambient Temperature
TA
–40
+85
°C
Capacitance of External Capacitor
Note 7
0.33
4.7
µF
Note 7. In low temperature (below 0 ˚C), the capacitance of electrolytic capacitor becomes lower. Therefore,
set higher values when using in low temperature.
Concerning the wiring length between the capacitor and the IC, the shorter the better.
Capacitors with good frequency characteristics such as tantalum capacitors, laminated ceramic
capacitors, and aluminum electrolytic capacitors for switching power supply are recommended for the
external capacitors.



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