CIRCUITS. TPS3837K33 Datasheet

TPS3837K33 Datasheet PDF


Part

TPS3837K33

Description

NANOPOWER SUPERVISORY CIRCUITS

Manufacture

etcTI

Page 11 Pages
Datasheet
Download TPS3837K33 Datasheet


TPS3837K33 Datasheet
TPS3836E18 / J25 / H30 / L30 / K33
TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33
NANOPOWER SUPERVISORY CIRCUITS
SLVS292A – JUNE 2000 – REVISED JANUARY 2002
D Supply Current of 220 nA (Typ)
D Precision Supply Voltage Supervision
Range: 1.8 V, 2.5 V, 3.0 V, 3.3 V
D Power-On Reset Generator With Selectable
Delay Time of 10 ms or 200 ms
D Push/Pull RESET Output (TPS3836),
RESET Output (TPS3837), or
Open-Drain RESET Output (TPS3838)
D Manual Reset
D 5-Pin SOT-23 Package
D Temperature Range –40°C to 85°C
description
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 VDD becomes higher than 1.1 V.
Thereafter, the supervisory circuit monitors VDD
and keeps RESET output 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 starts after VDD has risen
above the threshold voltage VIT.
D Applications Include
– Applications Using Low-Power DSPs,
Microcontrollers, or Microprocessors
– Portable/Battery-Powered Equipment
– Intelligent Instruments
– Wireless Communication Systems
– Notebook Computers
– Automotive Systems
TPS3836, TPS3838
DBV PACKAGE
(TOP VIEW)
CT 1 5 VDD
GND
2
MR 3 4 RESET
TPS3837
DBV PACKAGE
(TOP VIEW)
CT 1 5 VDD
GND
2
MR 3 4 RESET
When CT is connected to GND a fixed delay time of typical 10 ms is asserted. When connected to VDD the delay
time is typically 200 ms.
When the supply voltage drops below the threshold voltage VIT, the output becomes active (low) again.
All the devices of this family have a fixed-sense threshold voltage VIT 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
MSP430
VCC
CT
RESET
RST
Xin
Lithium
Battery
MR
Xout
Quartz
3.6 V
T GND
VSS
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.
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 DALLAS, TEXAS 75265
Copyright 2002, Texas Instruments Incorporated
1

TPS3837K33 Datasheet
TPS3836E18 / J25 / H30 / L30 / K33
TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33
NANOPOWER SUPERVISORY CIRCUITS
SLVS292A JUNE 2000 REVISED JANUARY 2002
description (continued)
The product spectrum is designed for supply voltages of 1.8 V, 2.5 V, 3 V, and 3.3 V. The circuits are available
in a 5-pin SOT-23 package. The TPS3836, TPS3837, TPS3838 families are characterized for operation over
a temperature range of 40°C to 85°C.
PACKAGE INFORMATION
TA
40°C to 85°C
DEVICE NAME
TPS3836E18DBVR
TPS3836E18DBVT
TPS3836J25DBVR
TPS3836J25DBVT
TPS3836H30DBVR
TPS3836H30DBVT
TPS3836L30DBVR
TPS3836L30DBVT
TPS3836K33DBVR
TPS3836K33DBVT
TPS3837E18DBVR
TPS3837E18DBVT
TPS3837J25DBVR
TPS3837J25DBVT
TPS3837L30DBVR
TPS3837L30DBVT
TPS3837K33DBVR
TPS3837K33DBVT
TPS3838E18DBVR
TPS3838E18DBVT
TPS3838J25DBVR
TPS3838J25DBVT
TPS3838L30DBVR
TPS3838L30DBVT
TPS3838K33DBVR
TPS3838K33DBVT
The DBVR passive indicates tape and reel of 3000 parts.
The DBVT passive indicates tape and reel of 250 parts.
THRESHOLD VOLTAGE
1.71 V
2.25 V
2.79 V
2.64 V
2.93 V
1.71 V
2.25 V
2.64 V
2.93 V
1.71 V
2.25 V
2.64 V
2.93 V
SYMBOL
PDNI
PDSI
PHRI
PCAI
PDTI
PDOI
PDRI
PCBI
PDUI
PDQI
PDPI
PCCI
PDVI
ORDERING INFORMATION
TPS383 6 E 18 DBV R
Reel
Package
Nominal Supply Voltage
Typical Reset Threshold Voltage
Functionality
Family
FUNCTION TABLE TPS3836, TPS3837, TPS3838
MR VDD > VIT RESET§ RESET
L 0 LH
L 1 LH
H0 LH
H1
§ TPS3836 and TPS3838
TPS3837
H
L
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Features Datasheet pdf TPS3836E18 / J25 / H30 / L30 / K33 TPS38 37E18 / J25 / L30 / K33, TPS3838E18 / J 25 / L30 / K33 NANOPOWER SUPERVISORY CI RCUITS SLVS292A – JUNE 2000 – REVIS ED JANUARY 2002 D Supply Current of 22 0 nA (Typ) D Precision Supply Voltage S upervision Range: 1.8 V, 2.5 V, 3.0 V, 3.3 V D Power-On Reset Generator With S electable Delay Time of 10 ms or 200 ms D Push/Pull RESET Output (TPS3836), RE SET Output (TPS3837), or Open-Drain RES ET Output (TPS3838) D Manual Reset D 5- Pin SOT-23 Package D Temperature Range –40°C to 85°C description The TPS38 36, TPS3837, TPS3838 families of superv isory circuits provide circuit initiali zation and timing supervision, primaril y for DSP and processor-based systems. During power on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory circuit monitors VDD and keeps RESET o utput active as long as VDD remains bel ow the threshold voltage VIT. An intern al timer delays the return of the output to the inactive state (high) t.
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