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TPS3838L30DBVT Datasheet

  • TPS3838L30DBVT

  • NANOPOWER SUPERVISORY CIRCUITS

  • 11頁(yè)

  • TI

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TPS3836E18 / J25 / H30 / L30 / K33
TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33
NANOPOWER SUPERVISORY CIRCUITS
SLVS292A 鈥?JUNE 2000 鈥?REVISED JANUARY 2002
D
Supply Current of 220 nA (Typ)
D
Precision Supply Voltage Supervision
D
D
D
D
D
Range: 1.8 V, 2.5 V, 3.0 V, 3.3 V
Power-On Reset Generator With Selectable
Delay Time of 10 ms or 200 ms
Push/Pull RESET Output (TPS3836),
RESET Output (TPS3837), or
Open-Drain RESET Output (TPS3838)
Manual Reset
5-Pin SOT-23 Package
Temperature Range 鈥?0擄C to 85擄C
D
Applications Include
鈥?Applications Using Low-Power DSPs,
Microcontrollers, or Microprocessors
鈥?Portable/Battery-Powered Equipment
鈥?Intelligent Instruments
鈥?Wireless Communication Systems
鈥?Notebook Computers
鈥?Automotive Systems
TPS3836, TPS3838
DBV PACKAGE
(TOP VIEW)
CT
1
2
3
4
RESET
5
VDD
description
GND
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
DD
becomes higher than 1.1 V.
Thereafter, the supervisory circuit monitors V
DD
and keeps 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 (high) to ensure proper system
reset. The delay time starts after V
DD
has risen
above the threshold voltage V
IT
.
MR
TPS3837
DBV PACKAGE
(TOP VIEW)
CT
GND
MR
1
2
3
4
RESET
5
VDD
When CT is connected to GND a fixed delay time of typical 10 ms is asserted. When connected to V
DD
the delay
time is typically 200 ms.
When the supply voltage drops below the threshold voltage V
IT
, the output becomes active (low) again.
All the devices of this family have a fixed-sense threshold voltage V
IT
set by an internal voltage divider.
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.
TPS3836K33
VDD
CT
RESET
MR
T
GND
RST
MSP430
VCC
Xin
Xout
VSS
Lithium
Battery
3.6 V
Quartz
32 kHz
TYPICAL OPERATING CIRCUIT
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
錚?/div>
2002, Texas Instruments Incorporated
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.
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

TPS3838L30DBVT 產(chǎn)品屬性

  • 1

  • 集成電路 (IC)

  • PMIC - 監(jiān)控器

  • -

  • 簡(jiǎn)單復(fù)位/加電復(fù)位

  • 1

  • 開路漏極或開路集電極

  • 低有效

  • 最小為 100 ms

  • 2.64V

  • -40°C ~ 85°C

  • 表面貼裝

  • SC-74A，SOT-753

  • SOT-23-5

  • Digi-Reel®

  • 296-3350-6

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