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SGLS141 – DECEMBER 2002
D
Qualification in Accordance With
AEC-Q100
D
Applications Include
†
– Applications Using Automotive
Low-Power DSPs, Microcontrollers, or
Microprocessors
– Battery-Powered Equipment
– Intelligent Instruments
D
Qualified for Automotive Applications
D
Customer-Specific Configuration Control
Can Be Supported Along With
†
Major-Change Approval
– Wireless Communication Systems
– Automotive Systems
D
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
TPS3836, TPS3838
DBV PACKAGE
(TOP VIEW)
D
D
D
D
Supply Current of 220 nA (Typ)
Precision Supply Voltage Supervision
Range: 1.8 V, 2.5 V, 3.0 V, 3.3 V
1
2
3
5
V
DD
CT
Power-On Reset Generator With Selectable
Delay Time of 10 ms or 200 ms
GND
Push/Pull RESET Output (TPS3836),
RESET Output (TPS3837), or
Open-Drain RESET Output (TPS3838)
4
RESET
MR
TPS3837
DBV PACKAGE
(TOP VIEW)
D
D
D
Manual Reset
5-Pin SOT-23 Package
Temperature Range –40°C to 125°C
1
2
3
5
V
DD
CT
†
Contact factory for details. Q100 qualification data available on
request.
GND
description
4
RESET
MR
The TPS3836, TPS3837, TPS3838 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
becomes higher than 1.1 V. Thereafter, the
DD
supervisory circuit monitors V
and keeps RESET output active as long as V
remains below the threshold
DD
DD
voltage V . An internal timer delays the return of the output to the inactive state (high) to ensure proper system
IT
reset. The delay time starts after V
has risen above the threshold voltage V .
DD
IT
When CT is connected to GND a fixed delay time of typical 10 ms is asserted. When connected to V
time is typically 200 ms.
the delay
DD
When the supply voltage drops below the threshold voltage V , the output becomes active (low) again.
IT
All the devices of this family have a fixed-sense threshold voltage V set by an internal voltage divider.
IT
The TPS3836 has an active-low push-pull RESET output. The TPS3837 has active-high push-pull RESET, and
TPS3838 integrates an active-low open-drain RESET output.
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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