The EMC1438 is a high-accuracy SMBus temperature sensor for monitoring up to eight temperature channels, including one internal and up to seven external diodes. It provides ±1°C accuracy for external diode temperatures between 40°C and 110°C and ±0.25°C accuracy for the internal diode between 0°C and 100°C, with 0.125°C resolution. The device features Resistance Error Correction for up to 100 Ω series resistance, Beta Compensation for BJT diode models, and automatic diode type detection. It includes hardware-controlled standby mode activated by a dedicated STANDBY pin, reducing quiescent current to 200 μA, and outputs ALERT and THERM signals for threshold alerts. The THERM output is non-maskable and triggers based on programmable limits. The EMC1438 supports SMBus 2.0 with block read and write protocols, a pin-selectable address via ADDR_SEL, and operates from a 3.3V supply. It is housed in a 16-pin, 4mm × 4mm QFN lead-free RoHS-compliant package.
The EMC1438 is a high accuracy, low cost, System Management Bus (SMBus) temperature sensor. Advanced features such as Resistance Error Correction (REC), Beta Compensation (to CPU diodes requiring the BJT or transistor model) and automatic diode type detection combine to provide a robust solution for complex environmental monitoring applications.
Additionally, the EMC1438 provides a hardware programmable system shutdown feature that is programmed at part power-up via a single TRIP_SET voltage channel that cannot be masked or corrupted through the SMBus.
Each device provides ±1° accuracy for external diode temperatures and ±2°C accuracy for the internal diode temperature. The EMC1428 monitors up to eight temperature channels (up to seven external and one internal).
Additional Features
| Microchip Technology, Inc. | |
|---|---|
| Product Category | Transistors |
| Product Number | EMC1438 |
