MAX6660AEE+ Maxim Integrated Products, MAX6660AEE+ Datasheet - Page 13

• Manufacturer Part Number: MAX6660AEE+
• Description: IC REG FAN SPEED 16-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX6660AEE+

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Fan Control, Multiplexer, Register Bank
• Sensor Type: External
• Sensing Temperature: 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: +/- 5 C
• Digital Output - Bus Interface: Serial (2-Wire)
• Digital Output - Number Of Bits: 10 bit + Sign
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 5. Configuration-Byte Bit Assignments
Table 6. Status-Byte Bit Assignments
7 (MSB)
7(MSB)
BIT
BIT
6
5
4
3
2
1
0
6
5
4
3
2
1
0
Fan-Speed Regulator with SMBus Interface
MAX6660 Overheat
OVERT Input Inhibit
ALERT Clear Mode
Thermal Closed/
Fan Driver Full
OVERT Polarity
Remote-Junction Temperature-Controlled
Remote High
Remote Low
Diode Open
Mask OVERT
ALERT Mask
Write Protect
Fan Failure
Open Loop
Run/Stop
OVERT
ALERT
______________________________________________________________________________________
NAME
Output
Scale
NAME
STATE
STATE
POR
POR
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
When high, indicates that the fan driver transistor of the MAX6660 has
overheated (temp > +150°C) and is in thermal shutdown. The fan driver remains
disabled until temperature falls below +140°C.
When high, indicates ALERT has been activated (pulled low), regardless of
cause (internal or external).
When high, indicates the fan driver is at full scale. Only valid in fan
closed-loop mode (Register FG B170 = 0). Set to high in fan open-loop mode
(Register FG B170 = 1).
When high, the remote-junction temperature exceeds the temperature in the
Remote High register.
When high, the remote-junction temperature is lower than the temperature in the
Remote Low register.
When high, the remote-junction diode is open.
When high, indicates that OVERT has been activated, regardless of cause
(internal or external).
When high, indicates the count in the Fan Tachometer Count register is higher
than the limit set in the Fan Tachometer Count Limit register.
When set to 1, ALERT is masked from internally generated errors.
When set to 1, the MAX6660 enters low-power standby.
0 provides active low, 1 provides active high.
When set to 1, Write Protect is in effect for the following applicable registers:
When set to 1, the thermal loop is open. The Fan Speed Control retains the last
closed-loop value unless overwritten by a bus command (in closed loop, the Fan
Speed Control is read only). If Fan Mode is set to Open Loop by writing a 1 to bit
0 of the Fan Gain register, then this bit is automatically set.
When set to 1, an external signal on OVERT is masked from bit 1 of the Status
register.
Mask the OVERT output from an internally generated overtemperature error.
When 0, reading the Status register clears or sending an Alert Response Request
clears ALERT (if the fault condition is no longer true). When set high, only an Alert
Response Request clears ALERT.
1. Configuration register bits 6, 5, 4, 3
2. T
3. T
4. Fan Conversion Rate register
MAX
HYST
register
register
DESCRIPTION
DESCRIPTION
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