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EM78P152S 데이터시트(PDF) 33 Page - List of Unclassifed Manufacturers

부품명 EM78P152S
상세설명  8-Bit Microcontroller with OTP ROM
PDF  52 Pages
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제조업체  ETC1 [List of Unclassifed Manufacturers]
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EM78P152S 데이터시트(HTML) 33 Page - List of Unclassifed Manufacturers

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EM78P152/3S
8-Bit Microcontroller with OTP ROM
5.12 Residue-Voltage Protection
When the battery is replaced, the device power (Vdd) is cut off but residue-voltage
remains. The residue-voltage may trip below the minimum Vdd, but not to zero. This
condition may cause a poor power-on reset. The following figures illustrate two
recommended methods on how to build a residue-voltage protection circuit for the
EM78P152/3S.
EM78P153S
/RESET
Vdd
100K
Q1
1N4684
10K
33K
Vdd
* Figure 5-15 Residue Voltage Protection Circuit 1
EM 78P153S
/RESET
Vdd
Q1
Vdd
R3
R2
R1
* Figure 5-16 Residue Voltage Protection Circuit 2
Note:
* Figure 5-15 and Figure 5-16 should be designed with their /RESET pin voltage larger than VIH(min).
Product Specification (V1.8) 09.08.2009
• 29
(This specification is subject to change without further notice)



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