1FEATURES
234• SOT23-8 Package
• ±1°C Remote Diode Sensor (Max)
• ±2.5°C Local Temperature Sensor (Max)
• Series Resistance Cancellation
• n-Factor Correction
• Two-Wire/ SMBus™ Serial Interface
• Multiple Interface Addresses
• Diode Fault Detection
• RoHS Compliant and NO Sb/Br

APPLICATIONS
• Processor/FPGA Temperature Monitoring
• LCD/ DLP®/LCOS Projectors
• Servers
• Central Office Telecom Equipment
• Storage Area Networks (SAN)

SUPPORTS DEFENSE, AEROSPACE AND
MEDICAL APPLICATIONS
• Controlled Baseline
• One Assembly/Test Site
• One Fabrication Site
• Available in Military (–55°C to 125°C)
Temperature Range(1)
• Extended Product Life Cycle
• Extended Product-Change Notification
• Product Traceability

DESCRIPTION
The TMP422 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 configure the device.
The TMP422 includes series resistance cancellation, programmable non-ideality factor, wide remote temperature
measurement range (up to 150°C), and diode fault detection.
The TMP422 is available in a SOT23-8 package.