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ꢈꢉꢊ ꢋꢂ ꢀꢈꢌꢍ ꢎ ꢌꢈꢀ ꢀꢎ ꢏꢐꢆꢌꢈꢑ ꢒꢋꢁ ꢂꢋꢁ ꢎ ꢏꢓ ꢔꢂ ꢕ
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SLVS340B – DECEMBER 2000 – REVISED DECEMBER 2002
D
D
D
Supply Current of 40 µA (Max)
typical applications
Battery Supply Current of 100 nA (Max)
D
Fax Machines
Supply Voltage Supervision Range:
– Adjustable
– Other Versions Available 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
Backup-Battery Voltage Can Exceed V
DD
Power-On Reset Generator With Fixed
100-ms Reset Delay Time
Advanced Modems
Automotive Systems
D
Active-High and Active-Low Reset Output
Portable Long-Time Monitoring Equipment
Point-of-Sale Equipment
D
Chip-Enable Gating . . . 3 ns (at V
Max Propagation Delay
= 5 V)
DD
D
D
10-Pin MSOP Package
MSOP (DGS) Package
(TOP VIEW)
Temperature Range . . . –40°C to 85°C
V
V
description
OUT
BAT
V
RESET
ACTUAL SIZE
3,05 mm x 4,98 mm
DD
GND
SENSE
RESET
CEOUT
The TPS3613-01 supervisory circuit monitors
MR
and controls processor activity by providing
backup-battery switchover for data retention of
CMOS RAM.
CEIN
During power on, RESET is asserted when the supply voltage (V
or V
) becomes higher than 1.1 V.
DD
BAT
Thereafter, the supply voltage supervisor monitors V
and keeps RESET output active as long as V
remains
DD
DD
below the threshold voltage V . An internal timer delays the return of the output to the inactive state (high) to
IT
ensure proper system reset. The delay time starts after V
has risen above the threshold voltage V .
DD
IT
When the supply voltage drops below the threshold voltage V , the output becomes active (low) again.
IT
The TPS3613-01 is available in a 10-pin MSOP package and is characterized for operation over a temperature
range of –40°C to 85°C.
typical operating circuit
Address
Power
Decoder
Supply
0.1 µF
Monitored
Voltage
CE
CMOS
RAM
CE
CMOS
RAM
Address Bus
uC
CEIN
CEOUT
Real-
Time
Clock
Backup
Battery
V
DD
V
BAT
R
R
x
y
V
CC
V
CC
V
CC
SENSE
8
8
RESET
RESET
Data Bus
16
TPS3613
MR
Switchover
Capacitor
Manual
Reset
V
OUT
V
CC
0.1 µF
GND
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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