FEATURES

TEMPERATURE LIMITS

APPLICATIONS

DESCRIPTION

The TMP401 is a remote temperature sensor monitor with

a

built-in

local

temperature

sensor.

The

remote

temperature sensor diode-connected transistors are

typically low-cost, NPN- or PNP-type transistors or diodes

that

are

an

integral

part

of

microcontrollers,

microprocessors, or FPGAs.

Remote accuracy is

±1°C for multiple IC manufacturers,

with no calibration needed. The Two-Wire serial interface

accepts SMBus write byte, read byte, send byte, and

receive byte commands to program alarm thresholds and

to read temperature data.

Features included in the TMP401 are series resistance

cancellation, wide remote temperature measurement

range (up to +150

°C), diode fault detection, and

temperature alert functions.

Device ID Register

Manufacturer ID Register

THERM Hysteresis Register

Consecutive Alert

Configuration Register

T

R

T

L

Status Register

Conversion Rate

Register

One− Shot

Start Register

D+

1

5

7

8

2

3

Bus Interface

TMP401

Resolution Register

Pointer Register

Configuration Register

Local Temp Low Limit

Local THERM Limit

Local Temp High Limit

Remote Temp Low Limit

Remote THERM Limit

Remote Temp High Limit

Remote

Temperature

Register

Local

Temperature

Register

Temperature

Comparators

Interrupt

Configuration

SCL

GND

THERM

4

6

ALERT/THERM2

V+

V+

SDA

D

−

TMP401

SBOS371 − AUGUST 2006

+15C Programmable, Remote/Local, Digital Out

TEMPERATURE SENSOR

www.ti.com

Copyright

 2006, Texas Instruments Incorporated

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.

DLP is a trademark of Texas Instruments. All other trademarks are the property of their respective owners.

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.