Temp Sensor Digital Serial (1-Wire) 24-Pin QSOP T/R

The ADM1029 is a versatile fan controller and monitor for use in personal computers, servers, telecommunications equipment, or any high-availability system where reliable control and monitoring of multiple cooling fans is required. Each ADM1029 can control the speed of one or two fans and can measure the speed of fans that have a tachometer output. The ADM1029 can also measure the temperature of one or two external sensing diodes or an internal temperature sensor, allowing fan speed to be adjusted to keep system temperature within acceptable limits. The ADM1029 has FAULT inputs for use with fans that can signal failure conditions, and inputs to detect whether or not fans are connected. The ADM1029 communicates with the host processor over an System Management (SMBus) serial bus. It supports eight different serial bus addresses, so that up to eight devices can be connected to a common bus, controlling up to sixteen fans. This makes software support and hardware design scalable. The ADM1029 has an interrupt output that allows it to signal fault conditions to the host processor. It also has a separate, cascadable fault output that allows the ADM1029 to signal a fault condition to other ADM1029s. The ADM1029 has a number of useful features including an automatic fan speed control option implemented in hardware with no software requirement, automatic use of backup fans in the event of fan failure, and supports hot-swapping of failed fans.

• Software Programmable and Automatic Fan Speed Control
• Automatic Fan Speed Control Allows Control
• Independent of CPU Intervention after Initial Setup
• Control Loop Minimizes Acoustic Noise and Power Consumption
• Remote and Local Temperature Monitoring
• Dual Fan Speed Measurement
• Supports Backup and Redundant Fans
• Supports Hot Swapping of Fans
• Cascadable Fault Output Allows Fault Signaling between Multiple ADM1029s
• Address Pin Allows Up to Eight ADM1029s in A System
• Small 24-lead QSOP Package
• This is a Pb-Free Device