參數(shù)資料
型號(hào): MC33464H-27CT1
廠商: MOTOROLA INC
元件分類(lèi): 電源管理
英文描述: MICROPOWER UNDERVOLTAGE SENSING CIRCUITS
中文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PSSO3
封裝: PLASTIC, SOT-89, 3 PIN
文件頁(yè)數(shù): 5/8頁(yè)
文件大?。?/td> 107K
代理商: MC33464H-27CT1
MC33464
5
MOTOROLA ANALOG IC DEVICE DATA
Figure 7. Microprocessor Reset Circuit with Delay
Vref
2
Input
1
Reset
3
Gnd
Microprocessor
CDelay
470 k
Vin
A time delayed reset can be accomplished with the addition of CDelay. Figure 5 provides a graph of time delays, for both rising
and falling output waveform edges, as a function of CDelay. If another value of pullup resistance is used, the time delay can be
calculated by using the equation:
tDelay
R CDelay
1
1 –
Vth(MPU)
Vin
t
p
where VthMPU is the microprocessor reset input threshold voltage and tp is the propagation delay internal to the MC33464.
Figure 8. Microprocessor Reset Circuit
Vref
2
Input
1
Reset
3
Gnd
Microprocessor
Vin
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