參數(shù)資料
型號(hào)： UPD75208GF
廠商： NEC Corp.
英文描述： 4-BIT SINGLE-CHIP MICROCOMPUTER
中文描述： 4位單片機(jī)
文件頁數(shù)： 43/62頁
文件大?。?/td> 497K
代理商： UPD75208GF
43
μ
PD75208
Power-on reset
operating voltage high
Power-on reset
operating voltage low
Power supply voltage
off time
Power supply voltage
rise time
Power-on reset circuit
*2
current consumption
V
DDH
t
r
V
DDL
t
off
I
DDPR
V
DD
= 5 V
±
10 %
V
DD
= 2.7 V
PARAMETER
SYMBOL
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
4.5
0
10
1
10
2
6.0
0.2
*1
100
20
V
V
μ
s
μ
A
μ
A
s
V
DD
V
PRE
V
LOAD
V
SS
RD9. 1EL
68 k
+5 V
–30 V
RD9. 1EL : Zener Diode (NEC)
Zener Voltage = 8.29 to 9.30 V
PD75208
μ
V
DD
V
DDH
V
DDL
t
r
t
off
*
1.
The following external circuit is recommended.
2.
Current to the on-chip pull-down resistor and power-on reset circuit (mask option) is not included.
3.
When the processor clock control register (PCC) is set to 0011 and is operated in the high-speed mode.
4.
When the PCC register is set to 0000 and is operated in the low-speed mode.
5.
When the system clock control register (SCC) is set to 1001 and is operated with the subsystem clock with
main system clock oscillation stopped.
POWER-ON RESET CIRCUIT CHARACTERISTICS (MASK OPTION) (Ta = -40 to +85
°
C)
*
1.
2
17
/f
XX
(31.3 ms at f
XX
= 4.19 MHz)
2.
Current with on-chip power-on reset circuit or power-on flag.
Remarks
Start the power supply smoothly.
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