EMC2301-1-ACZL-TR
Microchip TechnologyEMC2301-1-ACZL-TR is a Microchip RPM-based PWM fan controller — for thermal management in servers, networking gear, and industrial equipment: SMBus 2.0 interface, programmable 26kHz or 9.5Hz-to-2.24kHz PWM fan drive, tachometer range 480 to 16000 RPM with 0.5% accuracy (external crystal), and closed-loop Fan Speed Control algorithm that detects aging or stalled fans and triggers SMBus alerts, operating on 3.0V to 3.6V from -40C to +125C. The RPM-based closed loop holds fan speed against bearing wear and voltage droop, so acoustic noise stays within spec over the product lifetime without firmware intervention; the stall-detection interrupt lets the system flag a dead fan before thermal runaway. Business impact: in 1U servers and telecom shelves where every dB of fan noise matters, the EMC2301 replaces host-CPU fan control loops — freeing processor cycles and guaranteeing thermal response even if the host crashes. Selection advice: the -1-ACZL-TR code denotes MSOP-8 on tape and reel — for multi-fan systems, the EMC2302/2303/2305 cover 2/3/5 fans with shared SMBus addressing; verify the tachometer input matches the fan pole count in the datasheet. Parameters verified against Microchip Technology documentation.
- MPN
- EMC2301-1-ACZL-TR
- Manufacturer
- Microchip Technology
- Family
- Fan controller
- Package
- MSOP-8
- Manufacturer channel coverage
- Checked by RFQ
- Data last checked
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EMC2301-1-ACZL-TR FAQ
What should I check before substituting EMC2301-1-ACZL-TR with another Fan controller?
Match the full ordering code, not the series name: package (MSOP-8), temperature grade and packing all ride on the suffixes. A same-series code in a different package is a different orderable device, so confirm the substitute against the Microchip Technology datasheet before changing the BOM.