参数资料
型号: M37546G2SP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32
封装: 8.90 X 28 MM, 1.78 MM PITCH, PLASTIC, SDIP-32
文件页数: 92/105页
文件大小: 1105K
代理商: M37546G2SP
REJ03B0160-0122 Rev.1.22 Mar 13, 2009
page 85 of 100
7546 Group
Power-on reset circuit characteristics
(VCC = 1.8 to 5.5 V, VSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted)
Valid start voltage of power-on reset circuit (Note)
VPOR hold time
Rising time of valid power source of power-on reset circuit
Min.
Typ.
Max.
Symbol
Parameter
Limits
Unit
Test conditions
mV
s
ms
0
20
VPOR
TW(VPOR)
TW(VPOR-VDET)
Note: VPOR is the start voltage level of Vcc for the built-in power-on reset circuit to operate normally.
Keep VPOR to be lower than the Vcc voltage before rising of the Vcc power source to use the built-in power-on reset circuit.
Set the built-in low voltage detection circuit to be valid when the built-in power-on reset is used.
TW(VPOR) > 10 s
Low voltage detection circuit characteristics
(VCC = 1.8 to 5.5 V, VSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted)
Valid start voltage of low voltage detection circuit (Note)
Detection voltage of low voltage detection circuit
Detection time of low 5voltage detection circuit
Min.
1.0
1.85
1.8
Typ.
1.95
20
Symbol
Parameter
Limits
Unit
Test conditions
V
s
VLVD
VDET
TDET
Note: VLVD is the start voltage level of Vcc for the built-in low voltage detection circuit to operate normally.
If the Vcc power source becomes lower than VLVD, first set the Vcc voltage to be lower than VPOR. Next, according to the electrical characteristics of
the power-on reset circuit, perform the rising of Vcc.
Ta = 0 to 50 °C
Ta = –20 to 85 °C
Fig. 105 Electrical characteristics of power-on reset circuit and low voltage detection circuit
Vcc power source
waveform
VPOR
0V
TW(VPOR)TW(VPOR-VDET)
TDET
VDET
Internal reset signal
Power-on reset circuit
characteristics
Low voltage detection circuit
characteristics
VLVD
Max..
2.05
2.1
10
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