UPD17240 Datasheet, PDF (89/102 Pages) NEC – 4-BIT SINGLE-CHIP MICROCONTROLLERS FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTERS

µPD17240, 17241, 17242, 17243, 17244, 17245, 17246
Recommended Operating Ranges (TA = –40 to +85°C, VDD = 2.0 to 3.6 V)
Item
Supply Voltage
Oscillation frequency
Operating temperature
Low-voltage detector^Note
(Mask option)
Symbol
Conditions
MIN.
VDD1 fX = 1 MHz High-speed mode
2.0
(Instruction execution time: 16 µs)
VDD2 fX = 4 MHz High-speed mode
(Instruction execution time: 4 µs)
VDD3 fX = 8 MHz Normal mode
(Instruction execution time: 4 µs)
VDD4
High-speed mode
2.2
(Instruction execution time: 2 µs)
fX
RfX = fX/2 or fX
1.0
RfX = 2fX
3.5
TA
–40
tCY
3.5
TYP.
4.0
4.0
+25
MAX.
3.6
3.6
8.0
4.5
+85
32
Unit
V
V
MHz
MHz
°C
µs
Note
Reset if the status of VDD = 1.7 to 2.0 V lasts for 1 ms or longer. Program hang-up does not occur even
if the voltage drops, until the reset function is effected. A resonator may stop oscillating before the reset
function is effected if normal operation under the low voltage is not guaranteed.
Caution Design the application circuit so that the RESET pin goes low when the supply voltage is less
than 2.2 V.
fX vs VDD
(MHZ)
10
9
8
7
6
5
4
3
2
Operation
guaranteed area
1
0.4
0
2 2.2
3 3.6 4
Supply voltage VDD (V)
Remark The region indicated by the broken lines in the above figure is the guaranteed operating range in the
high-speed mode.
Data Sheet U15002EJ1V0DS
89