s-8424a Seiko Instruments Inc., s-8424a Datasheet - Page 31

• Manufacturer Part Number: s-8424a
• Description: Battery Backup Switching Ic
• Manufacturer: Seiko Instruments Inc.

Rev.2.2
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 The above connections and values will not guarantee correct operation. Before setting these
_00
values, perform sufficient evaluation on the application to be actually used.
BDT2
BDT1
CS
6 V
V
IN
+
10
3 V
μ
F
100 k Ω 100 k Ω
0.1
μ
F
VBAT
VIN
+
10 μ F
S - 8424A
Seiko Instruments Inc.
Figure 24 Application Circuit 2
Figure 25 Application Circuit 3
Series
VSS
VRO
RESET
VOUT
Card unit
VIN
PREEND
RESET
CS
S-8424A
Series
+
VSS
10 μ F
100 k Ω
VOUT
VBAT
CS
10 μ F
BATTERY BACKUP SWITCHING IC
0.1 μ F
+
100 k Ω
100 k Ω
VCC
INT
RESET
Microcontroller
SRAM
+
3 V
CS
10 μ F
S-8424A Series
31