General Description

The EMC6D102 is an environmental monitoring device with automatic fan control capability. This ACPI compliant device provides hardware monitoring for up to five voltages and three thermal zones, measures the speed of up to four fans, and controls the speed of multiple DC fans using Pulse Width Modulator (PWM) outputs.

PRODUCT FEATURES

■ 3.3 Volt Operation (5 Volt Tolerant Input Buffers)

■ SMBus 2.0 compliant interface (Fixed, Not Discoverable) With Three Slave Address Options

■ Fan Control

— PWM (Pulse width Modulation) Outputs (3)

— Fan Tachometer Inputs (4)

— Individual status and enable bits per tach input

— Programmable automatic fan control based on temperature

— Fan ramp rate control for acoustic noise reduction

■ Temperature Monitor

— Monitoring of Two Remote Thermal Diodes (+/- 3 deg C accuracy)

— Internal Ambient Temperature Measurement

— Limit Comparison of all Monitored Values

— Individual status and enable bits per thermal input

— Interrupt Pin for out-of-limit Temperature Indication

— Configurable offset for internal or external temperature channels.

— Supports 4 programmable temperature averaging modes

— 2 monitoring modes: Continuous or Cycle (Power Saving mode)

— Offers 2 Low Power Modes when monitoring is off: Sleep and Shutdown

■ Voltage Monitor

— Monitor Power supplies (+2.5V, +5V, +12V, Vccp, and VCC)

— Individual status and enable bits per voltage input

— Limit Comparison of all Monitored Values

— Interrupt Pin for out-of-limit Voltage Indication

— Supports 4 programmable voltage averaging modes

— 2 monitoring modes: Continuous or Cycle (Power Saving mode)

— Offers 2 Low Power Modes when monitoring is off: Sleep and Shutdown

■ 5 VID (Voltage Identification) inputs

■ XOR Tree test mode

■ Mechanical Package (24-pin SSOP); green, lead-free package also available