MAX6656
PRODUCTIONDual Remote/Local Temperature Sensors and Four-Channel Voltage Monitors
- Part Models
- 2
- 1ku List Price
- Starting From $3.58
Part Details
- Three Temperature Channels
- Two Remote PN Junctions
- One Local Sensor
- Four Voltage Channels
- +12V, +5V, +3.3V, +2.5V
- Three External Monitors
- One Internal Supply Monitor
- 11-Bit, 0.125°C Resolution
- High Accuracy: ±1°C Over +60°C to +100°C Temperature Range
- Programmable Under/Over-Threshold Alarms
- Programmable Power-Saving Mode
- No Calibration Required
- SMBus/I²C-Compatible Interface
- Active-low OVERT Output for Fan Control and System Shutdown
The MAX6655/MAX6656 are precise voltage and temperature monitors. The digital thermometer reports the temperature of two remote sensors and its own die temperature. The remote sensors are diode-connected transistors—typically a low-cost, easily mounted 2N3906 PNP type—that replace conventional thermistors or thermocouples. Remote accuracy is ±1°C for multiple transistor manufacturers with no calibration necessary. The remote channels can also measure the die temperature of other ICs, such as microprocessors, that contain a substrate-connected PNP with its collector grounded and its base and emitter available for temperature-sensing purposes. The temperature is digitized with 11-bit resolution.
The MAX6655/MAX6656 also measure their own supply voltage and three external voltages with 8-bit resolution. Each voltage input's sensitivity is set to give approximately 3/4-scale output code when the input voltage is at its nominal value. The MAX6655 operates at +5V supply and its second voltage monitor is 3.3V. The MAX6656 operates on a +3.3V supply and its second voltage monitor is 5V.
The 2-wire serial interface accepts standard SMBus™ Write Byte, Read Byte, Send Byte, and Receive Byte commands to program the alarm thresholds and to read data. The MAX6655/MAX6656 also provide SMBus alert response and timeout functions. The MAX6655/MAX6656 measure automatically and autonomously, with the conversion rate programmable. The adjustable rate allows the user to control the supply current.
In addition to the SMBus active-low ALERT output, the MAX6655/MAX6656 feature an active-low OVERT output, which is used as a temperature reset that remains active only while the temperature is above the maximum temperature limit. The active-low OVERT output is optimal for fan control or for system shutdown.
Applications
- Communication Systems
- Computers: Desktop, Workstation, Server
- Notebook Computers
- Servers
- Thin Clients
- Workstations
Documentation
Data Sheet 1
Reliability Data 1
Design Note 1
Technical Articles 4
Analog Dialogue 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX6656MEE+ | 16-QSOP-150_MIL | ||
| MAX6656MEE+T | 16-QSOP-150_MIL |
This is the most up-to-date revision of the Data Sheet.
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