DS1705 데이터 시트보기 (PDF) - Dallas Semiconductor -> Maxim Integrated
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DS1705 Datasheet PDF : 10 Pages
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DS1705/DS1706
TIMING DIAGRAM: PUSHBUTTON RESET Figure 4
PBRST
tPDLY
tPB
VIL
RST
RST
VIH
tRST
VOH
VOL
NON–MASKABLE INTERRUPT CIRCUIT EXAMPLE Figure 5
VSENSE
R1
R2
PBRST
VCC
GND
IN
DS1706
WDS
RST
ST
NMI
TO µP
VSENSE
+
R1 ) R2
R2
x
1.25
VMAX
+
VSENSE
VTP
x
VCC
Example: VSENSE = 4.50 volts at the trip point
VCC = 3.3 volts
10KΩ = R2
Therefore:
4.50
1.25
x 3.3 + 12.4 volts maximum
4.5
+
R1 ) 10K
10K
x
1.25
R1 + 26KW
011296 4/10
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