CIRCUITS. TPS3813L30-EP Datasheet
PROCESSOR SUPERVISORY CIRCUITS
SGLS343A – MAY 2006 – REVISED MAY 2006
PROCESSOR SUPERVISORY CIRCUITS WITH WINDOW-WATCHDOG
• Controlled Baseline
– One Assembly/Test Site, One Fabrication
• Extended Temperature Performance of -55°C
• Enhanced Diminishing Manufacturing
Sources (DMS) Support
• Enhanced Product-Change Notification
• Qualification Pedigree (1)
• Window-Watchdog With Programmable Delay
and Window Ratio
• 6-Pin SOT-23 Package
• Supply Current of 9 µA (Typ)
• Power On Reset Generator With a Fixed
Delay Time of 25 ms
• Precision Supply Voltage Monitor 2.5 V, 3 V,
3.3 V, 5 V
• Open-Drain Reset Output
(1) Component qualification in accordance with JEDEC and
industry standards to ensure reliable operation over an
extended temperature range. This includes, but is not limited
to, Highly Accelerated Stress Test (HAST) or biased 85/85,
temperature cycle, autoclave or unbiased HAST,
electromigration, bond intermetallic life, and mold compound
life. Such qualification testing should not be viewed as
justifying use of this component beyond specified
performance and environmental limits.
• Applications Using DSPs, Microcontrollers,
• Safety Critical Systems
• Automotive Systems
• Healing Systems
3,00 mm x 3,00 mm
The TPS3813 family of supervisory circuits provides circuit initialization and timing supervision, primarily for
DSPs and processor-based systems.
During power on, RESET is asserted when supply voltage (VDD) becomes higher than 1.1 V. Thereafter, the
supervisory circuit monitors VDD and keeps RESET active as long as VDD remains below the threshold voltage
(VIT). An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset.
The delay time, td = 25 ms typical, starts after VDD has risen above the threshold voltage (VIT). When the supply
voltage drops below the threshold voltage (VIT), the output becomes active (low) again. No external components
are required. All the devices of this family have a fixed-sense threshold voltage (VIT) set by an internal voltage
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.
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.
Copyright © 2006, Texas Instruments Incorporated
SGLS343A – MAY 2006 – REVISED MAY 2006
TYPICAL OPERATING CIRCUIT
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
For safety critical applications the TPS3813 family incorporates a so-called window-watchdog with
programmable delay and window ratio. The upper limit of the watchdog time-out can be set by either connecting
WDT to GND, VDD, or using an external capacitor. The lower limit and thus the window ratio is set by connecting
WDR to GND or VDD. The supervised processor now needs to trigger the TPS3813 within this window not to
assert a RESET.
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 6-pin SOT-23 package.
The TPS3813 devices are characterized for operation over a temperature range of –55°C to 125°C.
–55°C to 125°C
TPS381 3 J 25 DBV R
Nominal Supply Voltage
Nominal Threshold Voltage
VDD > VIT
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|Features||Datasheet pdf TPS3813J25-EP, TPS3813L30-EP TPS3813K33- EP, TPS3813I50-EP www.ti.com SGLS343A – MAY 2006 – REVISED MAY 2006 PRO CESSOR SUPERVISORY CIRCUITS WITH WINDOW -WATCHDOG FEATURES • Controlled Base line – One Assembly/Test Site, One Fa brication Site • Extended Temperature Performance of -55°C to 125°C • En hanced Diminishing Manufacturing Source s (DMS) Support • Enhanced Product-Ch ange Notification • Qualification Ped igree (1) • Window-Watchdog With Prog rammable Delay and Window Ratio • 6-P in SOT-23 Package • Supply Current of 9 µA (Typ) • Power On Reset Generat or With a Fixed Delay Time of 25 ms • Precision Supply Voltage Monitor 2.5 V , 3 V, 3.3 V, 5 V • Open-Drain Reset Output (1) Component qualification in a ccordance with JEDEC and industry stand ards to ensure reliable operation over an extended temperature range. This inc ludes, but is not limited to, Highly Ac celerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic lif.|
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