MAX6664AEE+ Maxim Integrated Products, MAX6664AEE+ Datasheet - Page 16

• Manufacturer Part Number: MAX6664AEE+
• Description: IC TEMP MON FAN CNTRL 16-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX6664AEE+

• Function: Fan Control, Temp Monitor
• Topology: ADC, Multiplexer, Register Bank, Tachometer
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 125°C, External Sensor
• Output Type: I²C™/SMBus™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Full Temp Accuracy: +/- 1 C
• Digital Output - Bus Interface: Serial (2-Wire)
• Digital Output - Number Of Bits: 11 bit
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Temperature Monitors and
PWM Fan Controllers
16
Addr(H)
02
03
06
08
______________________________________________________________________________________
READ/WRITE POR STATE
R
R
R
R
0000 0000
0000 0000
0000 0000
1111 1111
Status register 1:
Bit 7: Local temp low:
Bit 6: Local temp high:
Bit 5: Remote-diode error:
Bit 4: Remote temp THERM:
Bit 3: Remote temp low:
Bit 2: Remote temp high:
Bit 1: Fan fault:
Bit 0: Alarm speed:
Status register 2:
Bit 7: THERM:
Bit 6: Local temp THERM:
Bits [5:0]: Unused.
Extended bits of temperature data:
Bits [7:5]: Extended bits for local temperature data.
Bits [4:3]: Unused.
Bits [2:0]: Extended bits for remote temperature data.
Fan-speed reading register:
This register contains the fan-speed tachometer measurement.
1: Remote temp THERM limit has been exceeded. This bit is cleared by reading
For MAX6663, this bit is set to 1 when the PWM duty cycle = 100%. Once read,
1: THERM has been pulled low externally. This bit clears on a read of status
1: Local temp THERM limit has been exceeded. This bit is cleared by reading
1: Local temp low interrupt limit has been exceeded. This bit is cleared by
reading status register 1 for the MAX6653/MAX6663/MAX6664 or completing an
alert response protocol for the MAX6664. This bit is asserted on the next cycle if
the local temperature is still less than the limit.
1: Local temp high interrupt limit has been exceeded. This bit is cleared by
reading status register 1 for the MAX6653/MAX6663/MAX6664 or completing an
alert response protocol for the MAX6664. This bit is asserted on the next cycle if
the local temperature is still greater than the limit.
1: remote-diode short circuit or open circuit detected.
status register 1.
1: Remote temp low interrupt limit has been exceeded. This bit is cleared by
reading status register 1 for the MAX6653/MAX6663/MAX6664 or completing an
alert response protocol for the MAX6664. This bit is asserted on the next cycle if
the remote temperature is still less than the limit.
1: Remote temp high interrupt limit has been exceeded. This bit is cleared by
reading status register 1 for the MAX6653/MAX6663/ MAX6664 or completing an
alert response protocol for the MAX6664. This bit is asserted on the next cycle if
the remote temperature is still greater than the limit.
1: The fan is running under speed. This bit is cleared by reading status register 1
cycle if the fan fault still exists.
this bit does not reassert on the next monitoring cycle, even if the condition still
exists. It is asserted again if the condition is discontinued and then returns. For
the MAX6653/MAX6664, this bit is set to 1 when the THERM output goes to low.
register 2.
status register 2.
or completing an alert response protocol. This bit is asserted again on the next
Register Summary (continued)
DESCRIPTION