TPS3610U18, TPS3610T50
BATTERY-BACKUP SUPERVISORS FOR RAM RETENTION
SLVS327 – DECEMBER 2000
features
typical applications
Fax Machines
Supply Current of 40 µA (Max)
Battery Supply Current of 20 nA (Max)
Set-Top Boxes
Precision Supply-Voltage Monitor,
1.8 V, 5 V; Other Options on Request
Advanced Voice Mail Systems
Portable Battery-Powered Equipment
Computer Equipment
Watchdog Timer With 800-ms Time-Out
Backup-Battery Voltage can Exceed V
DD
Advanced Modems
Power-On Reset Generator With Fixed
100-ms Reset Delay Time
Automotive Systems
Portable Long-Time Monitoring Equipment
Point of Sale Equipment
Battery-OK Output
Voltage Monitor for Power-Fail or
Low-Battery Monitoring
PW PACKAGE
(TOP VIEW)
Manual Switchover to Battery-Backup
Mode
1
2
3
4
5
6
7
14
13
12
11
10
9
OUT
V
BAT
RESET
WDI
LOWLINE
CEOUT
BATTOK
PFO
Chip-Enable Gating . . . 3 ns (at V
Max Propagation Delay
= 5 V)
DD
V
DD
GND
MSWITCH
CEIN
BATTON
PFI
Battery-Freshness Seal
14-pin TSSOP Package
Temperature Range . . . –40°C to 85°C
8
–
typical operating circuit
Address
Decoder
Power
Supply
0.1 µF
External
CEIN
CE
CMOS
RAM
CE
CMOS
RAM
CEOUT
Address Bus
Real-
Time
Clock
Backup
Battery
Source
V
DD
V
BAT
R
R
x
y
TPS3610
uC
V
V
V
CC
CC
CC
PFI
8
8
RESET
I/O
RESET
WDI
Data Bus
16
I/O
PFO
I/O
BATTOK
BATTON
I/O
MR
Switchover
Capacitor
Manual
Reset
MSWITCH
GND
V
OUT
V
CC
0.1 µF
GND
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 2000, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
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