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ASC7521M8, ASC7531M10, ASC7611

Table of contents:
Info of ASC7521M8
Info of ASC7531M10
Info of ASC7611

ASC7521M8, ASC7531M10, ASC7611 Selling Leads, Datasheet

MFG:ANDIGILOG Package Cooled:MSOP-10 D/C:06+

ASC7521M8, ASC7531M10, ASC7611 Datasheet download

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Part Number: ASC7521M8

MFG: ANDIGILOG

Package Cooled: MSOP-10

D/C: 06+

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ASC7611 General Description

The aSC7611 has a two wire digital interface compatible with SMBus 2.0. Using a 10-bit - ADC, the aSC7611 measures the temperature of two remote diode connected transistors as well as its own die.

Using temperature information from these three zones, an automatic fan speed control algorithm is employed to minimize acoustic impact while achieving recommended

CPU temperature under varying operational loads.

To set fan speed, the aSC7611 has three independent pulse width modulation (PWM) outputs that are controlled by one, or a combination of three, temperature zones.

Both high- and low-frequency PWM ranges are supported.

The aSC7611 also includes a digital filter that can be invoked to smooth temperature readings for better control of fan speed and minimum acoustic impact. The aSC7611 has tachometer inputs to measure fan speed on up to four fans. Limit and status registers for all measured values are included to alert the system host that any measurements are outside of programmed limits via status registers.

System voltages of VCCP, 2.5V, 3.3V, 5.0V, and 12V motherboard power are monitored efficiently with internal scaling resistors.

ASC7611 Maximum Ratings

Parameter		Rating
Supply Voltage, V_DD		-0.5V to 6.0V
Voltage on Any Digital Input or Output Pin		-0.5V to 6.0V
Voltage on 12V Analog Input		-0.5V to 16V
Voltage on 5V Analog Input		-0.5V to 6.6V
Voltage on Remote 1 +, Remote 2 +		-0.5V to (VDD + 0.50V)
Voltage on Other Analog Inputs		-0.5V to 6.0V
Current on Remote 1 -, Remote 2 -		±1mA
Input Current on Any Pin²		±5mA
Package Input Current²		±20mA
Package Dissipation at T_A = 25°C		See (Note 3)
Storage Temperature		-65°C to +150°C
ESD⁴	Human Body Model	3000 V
	Machine Model	200 V
	Charged-Device Model	1500 V

ASC7611 Features

• 2-wire, SMBus 2.0 compliant, serial interface
• 10-bit -ADC
• Monitors internal and remote thermal diodes
• Monitors VCCP, 2.5V, 3.3V, 5.0V, and 12V motherboard/processor supplies
• Programmable autonomous fan control based on temperature readings
• Noise filtering of temperature reading for fan control
• 0.25°C digital temperature sensor resolution
• 3 PWM fan speed control outputs for 2-, 3- or 4- wire fans.
• Provides high and low PWM frequency ranges
• 4 fan tachometer inputs
• Monitors 5 VID control lines
• 24-Lead QSOP package
• XOR-tree test mode

ASC7611 Typical Application

• Desktop Computers Motherboards and Graphics Cards
• Laptop Computers
• Microprocessor based equipment (e.g. Basestations, Routers, ATMs, Point of Sales)

ASC7611 Connection Diagram

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