SBVS157B
–
APRIL 2011
–
REVISED AUGUST 2011
3-Pin Voltage Supervisors
with Active-Low, Open-Drain Reset
Check for Samples:
1
FEATURES
3-Pin SOT23 Package
Supply Current: 9
µA
(Typical)
Precision Supply Voltage Monitor:
2.5 V, 3 V, 3.3 V, 5 V
Power-On Reset Generator with
Fixed Delay Time of 200 ms
Pin-for-Pin Compatible with MAX803
Temperature Range:
–40°C
to +125°C
Open-Drain, RESET Output
DESCRIPTION
The
provides
circuit initialization and timing supervision, primarily
for DSPs and processor-based systems.
The TLV803 and TLV863 are functionally equivalent.
The TLV863 provides an alternate pinout of the
TLV803.
During power-on, RESET asserts when the supply
voltage (V
DD
) becomes greater than 1.1 V.
Thereafter, the supervisory circuit monitors V
DD
and
keeps RESET 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 (high) to
ensure proper system reset. The delay time (t
d(typ)
=
200 ms) starts after V
DD
has risen above the
threshold voltage, V
IT
. When the supply voltage drops
below the V
IT
threshold voltage, the output becomes
active (low) again. All the devices in this family have
a fixed sense-threshold voltage (V
IT
) set by an
internal voltage divider.
The product spectrum is designed for supply voltages
of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are
available in a 3-pin SOT-23 package. The TLV803
devices are characterized for operation over a
temperature range of
–40°C
to +125°C.
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2
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APPLICATIONS
•
•
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•
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DSPs, Microcontrollers, and Microprocessors
Wireless Communication Systems
Portable/Battery-Powered Equipment
Programmable Controls
Intelligent Instruments
Industrial Equipment
Notebook and Desktop Computers
Automotive Systems
DEVICE FAMILY COMPARISON
DEVICE
TLV803
TLV803
DBZ Package
(Top View)
GND
1
3
2
V
DD
V
DD
2
RESET
FUNCTION
Open-Drain, RESET Output
Push-Pull, RESET Output
Push-Pull, RESET Output
TLV863
DBZ Package
(Top View)
1
3
GND
RESET
RESET
GND
GND
5V
IN
GND
TYPICAL APPLICATION
3.3-V LDO
3.3 V
OUT
V
DD
DSP/FPGA/ASIC
V
DD
TLV803S
RESET
1
2
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.
All trademarks are the property of their respective owners.
Copyright
©
2011, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
TI [ TEXAS INSTRUMENTS ]
