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MAX6646MUA from MAXIM,MAXIM - Dallas Semiconductor

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MAX6646MUA

Manufacturer: MAXIM, MAX

+145C Precision SMBus-Compatible Remote/ Local Sensors with Overtemperature Alarms

Partnumber Manufacturer Quantity Availability
MAX6646MUA MAXIM, MAX 45 In Stock

Description and Introduction

+145C Precision SMBus-Compatible Remote/ Local Sensors with Overtemperature Alarms The MAX6646MUA is a temperature sensor and fan-speed controller manufactured by Maxim Integrated. Below are its specifications, descriptions, and features based on factual information:

### **Specifications:**  
- **Manufacturer:** Maxim Integrated  
- **Part Number:** MAX6646MUA  
- **Package:** 8-pin µMAX  
- **Operating Voltage Range:** 3.0V to 5.5V  
- **Temperature Measurement Range:** -55°C to +125°C (remote diode) / -40°C to +125°C (local sensor)  
- **Accuracy:** ±1°C (remote diode, +60°C to +100°C)  
- **Temperature Resolution:** 1°C  
- **Fan Control:** PWM output with programmable frequency (22.5Hz to 92kHz)  
- **Fan Tachometer Input:** Supports 2- or 3-wire fans  
- **Interface:** SMBus/I²C-compatible  
- **Power Consumption:** 1mA (typical)  

### **Descriptions:**  
The MAX6646MUA is a high-accuracy temperature sensor and fan controller designed for monitoring processor and system temperatures. It features a remote diode temperature sensor for CPU monitoring and an integrated local temperature sensor. The device provides programmable fan-speed control via PWM output and includes tachometer feedback for closed-loop fan management.  

### **Features:**  
- **Dual Temperature Monitoring:** Measures remote diode (CPU) and local (on-chip) temperatures.  
- **Programmable Fan Control:** Adjusts fan speed based on temperature thresholds.  
- **SMBus/I²C Interface:** Allows communication with a host system.  
- **High Accuracy:** ±1°C accuracy for remote diode measurements.  
- **Low Power Consumption:** Suitable for battery-powered applications.  
- **Small Form Factor:** 8-pin µMAX package for space-constrained designs.  
- **Fault Detection:** Includes open/short detection for remote diode.  

This information is strictly based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

+145C Precision SMBus-Compatible Remote/ Local Sensors with Overtemperature Alarms

Alternative Part Number

  • ADT7461ARMZ --: Remote/local temperature sensor with 2-wire interface, functionally similar to MAX6646 and widely available as a drop-in style alternative.
  • LM95235CIMM --: Precision remote diode temperature sensor in MSOP package, comparable accuracy and interface, suitable replacement for thermal monitoring.
  • EMC1403-A-AIZL-TR --: Multi-channel temperature sensor with SMBus interface, similar monitoring function and small package, good second-source option.
  • LM89CIMM --: Remote/local temperature sensor with SMBus interface in an 8-pin MSOP package, functionally similar to the MAX6646 and pin-compatible in most designs.

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