s-8426a Seiko Instruments Inc., s-8426a Datasheet - Page 16

• Manufacturer Part Number: s-8426a
• Description: Battery Backup Switching Ic
• Manufacturer: Seiko Instruments Inc.

16
BATTERY BACKUP SWITCHING IC
S-8426A Series
2. When Using Secondary Battery as Backup Battery
Remark The backup battery can be floating-recharged by using voltage regulator 1.
3. Memory Card
Caution
BDT2
BDT1
CS
V
The above connections and values will not guarantee correct operation. Before setting these values,
perform sufficient evaluation on the application to be actually used.
IN
6 V
10 µF
+
3 V
100 kΩ 100 kΩ
0.1 µF
+
VBAT
VIN
10 µF
Figure 19 Application Circuit 2
Figure 20 Application Circuit 3
S-8426A
Series
VSS
VRO
Seiko Instruments Inc.
VIN
PREEND
RESET
RESET
VOUT
S-8426A
Card unit
Series
CS
VSS
+
10 µF
VOUT
VBAT
100 kΩ
CS
10 µF
0.1 µF
100 kΩ
+
100 kΩ
RESET
VCC
INT
Microcontroller
3 V
+
10 µF
SRAM
CS
Rev.1.0
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