ꢀ ꢁꢂ ꢃꢄ ꢅꢄ ꢆꢃ ꢃ
ꢇꢈꢀꢀ ꢉ ꢊꢋꢆꢇ ꢈꢌꢍꢎꢁ ꢂꢎꢁ ꢉꢊꢏꢐ ꢂꢑ ꢊ ꢒ ꢑꢊ ꢓ ꢑ ꢔꢆꢁꢑ ꢔ ꢉꢊ ꢁꢊ ꢑ ꢌꢉ ꢂ ꢂꢑ ꢊ ꢂ
SLVS335B – DECEMBER 2000 – REVISED DECEMBER 2002
features
typical applications
D
Supply Current of 40 µA (Max)
D
Fax Machines
D
Precision 3.3-V Supply Voltage Monitor
Other Voltage Options on Request
D
D
D
D
D
D
D
D
Set-Top Boxes
Advanced Voice Mail Systems
Portable Battery Powered Equipment
Computer Equipment
D
D
D
D
D
D
D
D
D
Watchdog Timer With 800-ms Time-Out
Backup-Battery Voltage Can Exceed V
DD
Power-On Reset Generator With Fixed
100-ms Reset Delay Time
Advanced Modems
Automotive Systems
Voltage Monitor for Power-Fail or
Low-Battery Monitoring
Portable Long-Time Monitoring Equipment
Point-of-Sale Equipment
Manual Switchover to Battery-Backup
Mode
MSOP (DGS) Package
(TOP VIEW)
Manual Reset
Battery Freshness Seal
10-Pin MSOP Package
Temperature Range . . . –40°C to 85°C
V
V
BAT
RESET
OUT
V
DD
GND
MSWITCH
PFI
WDI
MR
PFO
description
The TPS3606-33 supervisory circuit monitors and
controls the processor activity. In case of power-
fail or brownout conditions, the backup-battery
switchover function of the TPS3606-33 allows a
low-power processor and its peripherals to run
from the installed backup battery without
asserting a reset beforehand.
ACTUAL SIZE
3,05 mm x 4,98 mm
typical operating circuit
Power
Supply
0.1 µF
External
Source
Backup
Battery
V
V
DD
BAT
R
R
x
y
TPS3606
uC
PFI
RESET
I/O
RESET
WDI
I/O
PFO
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 2002, Texas Instruments Incorporated
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1
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