s-8426a Seiko Instruments Inc., s-8426a Datasheet - Page 4

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

4
BATTERY BACKUP SWITCHING IC
S-8426A Series
Pin Configurations
1
2
3
4
1
2
3
4
8-Pin SOP(JEDEC)
8-Pin TSSOP
Top view
Top view
Figure 2
Figure 3
8
7
6
5
8
7
6
5
*1. Mount capacitors between VSS (GND pin) and the VIN, VBAT, VOUT,
*1. Mount capacitors between VSS (GND pin) and the VIN, VBAT, VOUT,
Seiko Instruments Inc.
Pin No.
Pin No.
and VRO pins. (Refer to the “ Standard Circuit”)
and VRO pins. (Refer to the “ Standard Circuit”)
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
PREEND
PREEND
RESET
VOUT
RESET
VOUT
Symbol
Symbol
VBAT
VBAT
VRO
VRO
VIN
VIN
VSS
VSS
CS
CS
*1
*1
*1
*1
*1
*1
*1
*1
Ground
Output pin of PREEND voltage detector
Backup power supply input pin
Output pin of CS voltage detector
Output pin of RESET voltage detector
Output pin of voltage regulator 2
Primary power supply input pin
Output pin of voltage regulator 1
Ground
Output pin of PREEND voltage detector
Backup power supply input pin
Output pin of CS voltage detector
Output pin of RESET voltage detector
Output pin of voltage regulator 2
Primary power supply input pin
Output pin of voltage regulator 1
Table 2
Table 3
Description
Description
Rev.1.0
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