TPS31xxExx, TPS31xxH20, TPS31xxK33
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ULTRALOW SUPPLY CURRENT/SUPPLY VOLTAGE SUPERVISORY CIRCUITS
SLVS363B − AUGUST 2001 − REVISED SEPTEMBER 2004
features
D
Precision Supply Voltage Supervision
D
D
D
D
D
D
D
Range: 0.9 V, 1.2 V, 1.5 V, 1.6 V,
2 V, 3.3 V
High Trip Point Accuracy: 0.75%
Supply Current of 1.2
µA
(Typ)
RESET Defined With Input Voltages as Low
as 0.4 V
Power On Reset Generator With a Delay
Time of 130 ms
Push/Pull or Open-Drain RESET Outputs
SOT23-6 Package
Temperature Range
. . .
−40°C to 85°C
RESET
GND
MR
TPS3103
DBV PACKAGE
(TOP VIEW)
1
2
3
6
5
4
V
DD
PFO
PFI
TPS3106
DBV PACKAGE
(TOP VIEW)
RSTVDD
GND
MR
1
2
3
6
5
4
V
DD
RSTSENSE
SENSE
typical applications
D
Applications Using Low-Power DSPs,
D
D
D
D
D
D
D
Microcontrollers or Microprocessors
Portable/Battery-Powered Equipment
Intelligent Instruments
Wireless Communication Systems
Programmable Controls
Industrial Equipment
Notebook/Desktop Computers
Automotive Systems
TPS3110
DBV PACKAGE
(TOP VIEW)
RESET
GND
MR
1
2
3
6
5
4
V
DD
WDI
SENSE
description
The TPS310x, TPS311x families of supervisory
circuits provide circuit initialization and timing
supervision, primarily for DSP and processor-
based systems.
During power on, RESET is asserted when the
supply voltage (V
DD
) becomes higher than 0.4 V.
Thereafter, the supervisory circuit monitors V
DD
and keeps the RESET output active as long as
V
DD
remains below the threshold voltage (V
IT
). An
internal timer delays the return of the output to the
inactive state to ensure proper system reset. The
delay time starts after V
DD
has risen above the V
IT
.
When the V
DD
drops below the V
IT
, the output
becomes active again.
typical application circuit
3.3 V
1.6 V
VDD
TPS3106E33DBV
R1
MR
SENSE
R2
RSTSENSE
GND
GND
GND
RSTVDD
RESET
R3
Vcore
DSP
VIO
All the devices of this family have a fixed-sense threshold voltage (V
IT
) set by an internal voltage divider.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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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.
Copyright
2001 − 2004 Texas Instruments Incorporated
1
TI [ TEXAS INSTRUMENTS ]
