Texas Instruments TPS3836K33DBVT, TPS3836K33DBVR, TPS3836J25DBVT, TPS3836J25DBVR, TPS3836H30DBVT 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

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

description

GND

The TPS3836, TPS3837, TPS3838 families of
supervisory circuits provide circuit initialization

MR

and timing supervision, primarily for DSP and
processor-based systems.

During power on, RESET
supply voltage V

DD

Thereafter, the supervisory circuit monitors V
and keeps RESET output active as long as V
remains below the threshold voltage VIT. An

is asserted when the

becomes higher than 1.1 V.

DD
DD

CT

GND

internal timer delays the return of the output to the
inactive state (high) to ensure proper system
reset. The delay time starts after V
above the threshold voltage V

.

IT

has risen

DD

MR

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.

2

3

TPS3837

DBV PACKAGE

(TOP VIEW)

1

2

3

5

V

DD

4

RESET

V

5

4

DD

RESET

the delay

DD

When the supply voltage drops below the threshold voltage V
All the devices of this family have a fixed-sense threshold voltage V
The TPS3836 has an active-low push-pull RESET

TPS3838 integrates an active-low open-drain RESET

TPS3836K33

V

DD

CT

RESET

MR

T

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.

GND

TYPICAL OPERATING CIRCUIT

output. The TPS3837 has active-high push-pull RESET , and

output.

V

CC

RST

Xout

V

SS

MSP430

Xin

, the output becomes active (low) again.

IT

set by an internal voltage divider.

IT

Lithium
Battery

Quartz
32 kHz

3.6 V

Copyright  2002, Texas Instruments Incorporated

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

1

TPS3836E18 / J25 / H30 / L30 / K33

40 C to 85 C

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

T

A

TPS3836E18DBVR
TPS3836J25DBVR
TPS3836H30DBVR
TPS3836L30DBVR
TPS3836K33DBVR
TPS3837E18DBVR

–40°C to 85°C

†

The DBVR passive indicates tape and reel of 3000 parts.

‡

The DBVT passive indicates tape and reel of 250 parts.

TPS3837J25DBVR
TPS3837L30DBVR
TPS3837K33DBVR
TPS3838E18DBVR
TPS3838J25DBVR
TPS3838L30DBVR
TPS3838K33DBVR

DEVICE NAME THRESHOLD VOLTAGE SYMBOL

†

TPS3836E18DBVT

†

TPS3836J25DBVT

†

TPS3836H30DBVT

†

TPS3836L30DBVT

†

TPS3836K33DBVT

†

TPS3837E18DBVT

†

TPS3837J25DBVT

†

TPS3837L30DBVT

†

TPS3837K33DBVT

†

TPS3838E18DBVT

†

TPS3838J25DBVT

†

TPS3838L30DBVT

†

TPS3838K33DBVT

‡

‡

‡

‡

‡

‡
‡
‡

‡

‡
‡
‡

‡

1.71 V PDNI

2.25 V PDSI

2.79 V PHRI

2.64 V PCAI

2.93 V PDTI

1.71 V PDOI

2.25 V PDRI

2.64 V PCBI

2.93 V PDUI

1.71 V PDQI

2.25 V PDPI

2.64 V PCCI

2.93 V PDVI

ORDERING INFORMATION

TPS383 6 E 18 DBV R

FUNCTION TABLE TPS3836, TPS3837, TPS3838

MR

L 0 L H

L 1LH
H 0LH
H 1 H L

§

TPS3836 and TPS3838

¶

TPS3837

VDD > V

IT

Reel
Package
Nominal Supply Voltage
Typical Reset Threshold Voltage
Functionality
Family

RESET

§

RESET

¶

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

functional block diagram

V

DD

TPS3836E18 / J25 / H30 / L30 / K33

TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33

NANOPOWER SUPERVISORY CIRCUITS

SLVS292A – JUNE 2000 – REVISED JANUARY 2002

MR

GND

R3

Band-Gap
Reference

R1

R2

S2

S1

S3

C1

C2

C3

C

T

+

–

Reset Logic

and Timer

Refresh

Timer

Reset (TPS3837-Push-Pull)
Reset (TPS3836-Push-Pull

TPS3838-Open-Drain)

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

3

TPS3836E18 / J25 / H30 / L30 / K33
TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33
NANOPOWER SUPERVISORY CIRCUITS

SLVS292A – JUNE 2000 – REVISED JANUARY 2002

timing diagram

V

DD

< 1.1 V

MR

RESET

A

V

IT

B C D E F G

t

t

t

Undefined

Output

t

d

t

d

t

d

Undefined

Output

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265