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Document Type: Datasheet

Product: SMSC EMC2101 / EMC2101-R – SMBus Fan Control with 1°C Accurate Temperature Monitoring

Purpose: This datasheet provides detailed technical information about the EMC2101 and EMC2101-R integrated circuits. It's intended for engineers and developers who are designing systems using this device.

Key Features/Functionality:

️· Temperature Monitoring: Precise temperature readings using external diodes or thermistors. Supports multiple temperature sensors.
️· Fan Control: SMBus-based control of fan speeds. Supports PWM (Pulse Width Modulation) control. Offers a lookup table for customized fan speed profiles.
️· SMBus Interface: Communication with a host system via the SMBus protocol.
️· Fault Queue: The device reports faults (e.g., over-temperature, fan failure) through a fault queue.
️· Multiple Packages: Available in various packages (MSOP, TSSOP, SOIC).
️· EMC2101-R variation: Supports remote temperature monitoring.

Document Organization:

1. Introduction/Overview: (Not fully visible in excerpt) Introduces the device and its features.

2. Pinout: (Figure 2.1) Details the pin assignments of the IC.
3. Functional Description: (Chapter 4 & 5) Explains the operation of the device, including the SMBus interface and temperature/fan control mechanisms.
4. Registers: (Chapter 6) Detailed descriptions of the various registers used to configure and control the device. This is a large section, listing and explaining each register’s function and bits.
5. Appendices: Provides additional information like advanced PWM options and TACH reference tables.
6. Package Diagrams: (Chapter 7) Illustrations of the physical package types.
7. List of Figures/Tables: Provides a catalog of figures and tables in the document.



Key Terms/Concepts:

️· SMBus: System Management Bus – a communication protocol.
️· PWM: Pulse Width Modulation – a technique used to control fan speed.
️· Tachometer (TACH): Used to monitor fan speed.
️· Diode/Thermistor: External sensors used for temperature detection.



In essence, this datasheet is a comprehensive guide for integrating the SMSC EMC2101 into a system that requires accurate temperature monitoring and precise fan control.