Texas Instruments TPS3801L30DCKR, TPS3801K33DCKR, TPS3801J25DCKR, TPS3801I50DCKR Datasheet

TPS3801J25, TPS3801L30, TPS3801K33, TPS3801I50

ULTRA-SMALL SUPPLY VOLTAGE SUPERVISORS

SLVS219 – AUGUST 1999

D

5-Pin SC-70 (SOT-323) Package

D

Supply Current of 9 µA (Typ)

D

Power-On Reset Generator With Fixed

TPS3801 . . . DCK PACKAGE

(TOP VIEW)

GND

1

MR

5

Delay Time of 200 ms

D

Precision Supply Voltage Monitor 2.5 V, 3 V,

3.3 V, 5 V

D

Manual Reset Input

D

T emperature Range ...–40°C to 85°C

GND

RESET

2

3

4

V

DD

description

The TPS3801 family of supervisory circuits provide circuit initialization and timing supervision, primarily for
DSPs and processor-based systems.

During power-on, RESET is asserted when the supply voltage V
supervisory circuit monitors V

and keeps RESET active as long as VDD remains below the threshold voltage

DD

VIT. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset.
The delay time, t

= 200 ms, starts after V

d(typ)

has risen above the threshold voltage V

DD

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 V
divider.

The TPS3801 devices incorporate a manual reset input, MR. A low level at MR causes RESET to become
active.

becomes higher than 1.1 V. Thereafter , the

DD

. When the supply

IT

set by an internal voltage

IT

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 5-pin SC-70 (SOT-323) package which is only about half the size of a 5-pin SOT-23 package.

The TPS3801 devices are characterized for operation over a temperature range of –40°C to 85°C.

typical applications

D

VDD = 3.3 V

100 nF

V

DD

TPS3801K33

RESET RESET

MR

GND

V

DD

TMS320LC54x

GND

Applications Using DSPs, Microcontrollers,
or Microprocessors

D

Wireless Communication Systems

D

Portable/Battery-Powered Equipment

D

Programmable Controls

D

Intelligent Instruments

D

Industrial Equipment

D

Notebook/Desktop Computers

D

Automotive Systems

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  1999, Texas Instruments Incorporated

1

TPS3801J25, TPS3801L30, TPS3801K33, TPS3801I50

40°C to 85°C

ULTRA-SMALL SUPPLY VOLTAGE SUPERVISORS

SLVS219 – AUGUST 1999

AVAILABLE OPTIONS

T

A

°

–

DEVICE NAME THRESHOLD VOLTAGE MARKING

TPS3801J25DCK 2.25 V NJA
TPS3801L30DCK 2.64 V NPA

°

TPS3801K33DCK 2.93 V NWA

TPS3801I50DCK 4.55 V NSA

FUNCTION/TRUTH TABLE, TPS3801

MR

L
L
H
H

Family

VDD>V

0
1
0
1

ORDERING INFORMATION

25

J1TPS380 RDCK

Nominal Threshold Voltage

Functionality

RESET

IT

L
L
L
H

Reel

Package

Nominal Supply Voltage

functional block diagram

MR

V

DD

GND

30 kΩ

R1

R2

TPS3801

Reference

Voltage

of 1.137 V

Reset
Logic

+

_
+

Timer

Oscillator

RESET

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

ÎÎ

ÎÎ

ÎÎ

ÎÎ

timing diagram

V

(NOM)

V

DD

V

1.1 V

MR

TPS3801J25, TPS3801L30, TPS3801K33, TPS3801I50

ULTRA-SMALL SUPPLY VOLTAGE SUPERVISORS

SLVS219 – AUGUST 1999

IT

t

1

RESET

0

t

1

0

t

d

t

d

t

d

t

Undefined Behavior of

RESET Output For VDD< 1.1 V

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

3