1 Features

1• AEC-Q100 Qualified with the Following Results

– Temperature Grade 1: –40°C to +125°C

– Device HBM ESD Classification Level 2

– Device CDM ESD Classification Level C5

• SOT23-8 Package

• ±1°C Remote Diode Sensor (Maximum)

• ±1.5°C Local Temperature Sensor (Maximum)

• Series Resistance Cancellation

• n-Factor Correction

• Two-Wire I2C or SMBus™ Compatible Serial

Interface

• Multiple Interface Addresses

• Diode Fault Detection

• RoHS Compliant and No Sb/Br

2 Applications

• Processor and FPGA Temperature Monitoring

• LCD, DLP, and LCOS Projectors

• Servers

• Central Office Telecom Equipment

• Storage Area Networks (SAN)

3 Description

The TMP421-Q1, TMP422-Q1, and TMP423-Q1

devices are single, dual, and triple remote,

automotive-qualified temperature sensor monitors

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 field-programmable gate arrays

(FPGAs).

Remote accuracy is ±1°C for multiple device

manufacturers, with no calibration needed. The twowire

serial interface accepts SMBus write byte, read

byte, send byte, and receive byte commands to

configure the device.

The TMP421-Q1, TMP422-Q1, and TMP423-Q1

include series resistance cancellation, programmable

non-ideality factor, wide remote temperature

measurement range (up to +150°C), and diode fault

detection.

The TMP421-Q1, TMP422-Q1, and TMP423-Q1 are

all available in an 8-pin SOT-23 package.