LTC692CN8 查看數據表（PDF） - Linear Technology
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LTC692CN8 Datasheet PDF : 20 Pages
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LTC692/LTC693
APPLICATIONS INFORMATION
Pushbutton Reset
The LTC692/LTC693 do not provide a logic input for direct
connection to a pushbutton. However, a pushbutton in
series with a 100Ω resistor connected to the RESET output
pin (Figure 13) provides an alternative for manual reset.
Connecting a 0.1μF capacitor to the RESET pin debounces
the pushbutton input.
The 100Ω resistor in series with the pushbutton is required
to prevent the ringing, due to the capacitance and lead
inductance, from pulling the RESET pins of the MPU and
LTC692/LT693 below ground.
5V
VCC
RESET
LTC692
LTC693
GND
0.1μF
100Ω
RESET
MPU
(e.g. 6805)
692_3 • F13
Figure 13. The External Pushbutton Reset
TYPICAL APPLICATIONS
Capacitor Backup with 74HC4016 Switch
Write Protect for Additional RAMs
R1
10k
1
R2
30k
5V
10 11 12 14
2
74HC4016
+
7
13
0.1μF
VCC
VOUT
LTC693
VBATT LOW LINE
100μF
GND
0.1μF
692_3 • TA03
5V
0.1μF
3V
VCC
VOUT
LTC693
CE OUT
VBATT
CE IN
LOW LINE
GND
+
10μF
20ns PROPAGATION
DELAY
CSA
VCC
0.1μF 62512
RAMA
CS
VCC
0.1μF 62128
RAMB
CSB
CS1
CS2
VCC
0.1μF 62128
RAMC
CSC
CS1
CS2
OPTIONAL CONNECTION FOR
ADDITIONAL RAMs
692_3 • TA04
0692fa
16
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