s-8424a Seiko Instruments Inc., s-8424a Datasheet - Page 4

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

4
BATTERY BACKUP SWITCHING IC
S-8424A Series
Pin Configurations
PREEND
PREEND
VBAT
VBAT
VSS
VSS
CS
CS
1
2
3
4
8-Pin SON(B)
1
2
3
4
8-Pin TSSOP
Top View
Figure 2
Figure 3
Top View
8
7
6
5
8
7
6
5
VRO
VIN
VOU T
RESET
VRO
VIN
VOUT
RESET
Seiko Instruments Inc.
*1 to *4. Mount capacitors between VSS (GND pin) and the VIN, VBAT,
*1 to *4. Mount capacitors between VSS (GND pin) and the VIN, VBAT,
Pin No.
Pin No.
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
VOUT, and VRO pins. (Refer to the “Standard Circuit”)
VOUT, and VRO pins. (Refer to the “Standard Circuit”)
PREEND
PREEND
RESET
RESET
Symbol
VOUT
Symbol
VOUT
VBAT
VBAT
VRO
VRO
VIN
VIN
VSS
VSS
CS
CS
*3
*3
*4
*4
*1
*1
*2
*2
Ground
Output pin of PREEND voltage detector
Output pin of voltage regulator 1
Ground
Output pin of PREEND voltage detector
Output pin of voltage regulator 1
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
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
Table 1
Table 2
Description
Description
Rev.2.2
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