ENABLE

GND

SENSE

VCC

CT

SENSE_OUT

1

2

3

6

5

4

TPS3895/TPS3897

DRYPACKAGE

(TOPVIEW)

ENABLE

GND

SENSE

VCC

CT

SENSE_OUT

1

2

3

6

5

4

TPS3896/TPS3898

DRYPACKAGE

(TOPVIEW)

TPS3895, TPS3896

TPS3897, TPS3898

www.ti.com

SBVS172A

– JULY 2011 – REVISED SEPTEMBER 2011

Single-Channel, Adjustable Supervisory Circuit in Ultra-Small Package

Check for Samples: TPS3895, TPS3896, TPS3897, TPS3898

1

FEATURES

DESCRIPTION

The TPS3895, TPS3896, TPS3897, and TPS3898

2

•

Very Small

µSON (1.45 mm × 1 mm) Package

devices (TPS389x) are a family of very small

•

Adjustable Threshold down to 500 mV

supervisory circuits that monitors voltage greater than

•

Threshold Accuracy: 1.0% Over Temperature

500 mV with a 0.25% (typical) threshold accuracy

and offer a adjustable delay time using external

•

Capacitor-Adjustable Delay Time

capacitors. The TPS389x family also has a logic

•

Low Quiescent Current: 6

µA (typ)

enable pin (ENABLE or ENABLE) to power on/off the

•

External Enable Input

output. With the TPS3895, for example, when the

input voltage pin (SENSE) rises above the threshold,

•

Open-Drain (rated at 18V)/Push-Pull Output

and the enable pin (ENABLE) is high, then the output

Options

pin

(SENSE_OUT)

goes

high

after

the

•

Temperature Range:

–40°C to +125°C

capacitor-adjustable delay time. When SENSE falls

•

Pin-for-Pin Compatible with MAX6895/6/7/8

below

the

threshold

or

ENABLE

is

low,

then

SENSE_OUT goes low. For truth tables, see Table 2

APPLICATIONS

and Table 3.

•

DSPs, Microcontrollers, and Microprocessors

For TPS389xA versions, both SENSE and ENABLE

have a capacitor-adjustable delay. The output asserts

•

Notebook and Desktop Computers

after

this

capacitor-adjustable

delay

when

both

•

PDAs and Handheld Products

SENSE

and

ENABLE

inputs

are

good.

The

•

Portable and Battery-Powered Products

TPS389xP devices have a small, 0.2-

µs propagation

delay from when the enable pin asserts to when the

•

FPGA and ASIC

output pin asserts, provided SENSE is above the

threshold.

All devices operate from 1.7 V to 6.5 V and have a

typical quiescent current of 6

µA with an open-drain

output rated at 18 V. The TPS389x is available in an

ultra-small

µSON package and is fully specified over

Table 1. FAMILY COMPARISON

INPUT

(SENSE)

ENABLE

DEVICE

ENABLE

OUTPUT

DELAY

DELAY

Active

Active high,

Capacitor

Capacitor

TPS3895A

high

push-pull

adjustable

adjustable

Active

Active high,

Capacitor

TPS3895P

0.2

µs

high

push-pull

adjustable

Active low,

Capacitor

Capacitor

TPS3896A

Active low

push-pull

adjustable

adjustable

Active low,

Capacitor

TPS3896P

Active low

0.2

µs

push-pull

adjustable

Active

Active high,

Capacitor

Capacitor

TPS3897A

high

open-drain

adjustable

adjustable

Active

Active high,

Capacitor

TPS3897P

0.2

µs

high

open-drain

adjustable

Active low,

Capacitor

Capacitor

TPS3898A

Active low

open-drain

adjustable

adjustable

Active low,

Capacitor

TPS3898P

Active low

0.2

µs

open-drain

adjustable

1

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.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.