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EM78P447SAM датащи(PDF) 29 Page - ELAN Microelectronics Corp

номер детали EM78P447SAM
подробное описание детали  8-BIT MICRO-CONTROLLER
PDF  55 Pages
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производитель  EMC [ELAN Microelectronics Corp]
домашняя страница  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM78P447SAM датащи(HTML) 29 Page - ELAN Microelectronics Corp

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EM78P447S
OTP ROM
4.11 Residue-Voltage Protection
When battery is replaced, device power (Vdd) is taken off but residue-voltage remains. The residue-voltage may trips
below Vdd minimum, but not to zero. This condition may cause a poor power on reset. Fig.16 and Fig.17 show how to build
the residue-voltage protection circuit.
EM78P447N
/RESET
Vdd
40K
Q1
1N4684
10K
33K
Vdd
Fig.14 The Residue Voltage Protection Circuit 1
EM78P447N
/RESET
Vdd
Q1
Vdd
40K
R2
R1
Fig.15 The Residue Voltage Protection Circuit 2
This specification is subject to change without prior notice.
06.25.2003 (V1.1)
29



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