LM75A

Description

Lm75a

The Lm75a temperature sensor asic is available from D-Central Technologies, shipping from Canada.

The LM75A is a digital temperature sensor IC used on ASIC miner hashboards and control boards to monitor chip and board temperatures in real time. It communicates over the I2C bus and provides 11-bit temperature readings with 0.125°C resolution. When a hashboard sensor fails, the control board may misread temperatures — causing false thermal shutdowns, fan speed errors, or uncontrolled overheating. Replacing a faulty LM75A restores accurate thermal monitoring.

Found on hashboards from Bitmain Antminer, MicroBT Whatsminer, and other ASIC miners, the LM75A is a common replacement part in ASIC repair. It operates on 2.7V–5.5V with ±2°C accuracy across the typical mining temperature range. Three address pins allow up to eight sensors per I2C bus — which is why you will find multiple LM75A chips on a single hashboard, each monitoring a different thermal zone.

Key Specs

• Interface: I2C (up to 400 kHz)
• Resolution: 11-bit (0.125°C)
• Accuracy: ±2°C (25°C to 100°C)
• Supply voltage: 2.7V – 5.5V
• Package: SOP-8

Used in Antminer S9, S17, S19 series and other ASIC miners for hashboard temperature sensing. A must-have replacement part for any repair bench.