MAX6661AEE Maxim Integrated Products, MAX6661AEE Datasheet - Page 12

• Manufacturer Part Number: MAX6661AEE
• Description: Board Mount Temperature Sensors
• Manufacturer: Maxim Integrated Products

Specifications of MAX6661AEE

• Full Temp Accuracy: +/- 5 C
• Package / Case: QSOP-16
• Digital Output - Bus Interface: Serial (SPI)
• Digital Output - Number Of Bits: 10 bit + Sign
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Output Type: Digital
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

present. Bits 2 through 6 of the status register are
cleared by any successful read of the status register,
unless the fault persists. The ALERT output follows the
status flag bit. Both are cleared when successfully
read, but if the condition still exists, the ALERT and the
Remote Temperature-Controlled Fan-Speed
Regulator with SPI-Compatible Interface
Table 4. Configuration Register Bit Assignments
Table 5. Status Register Bit Assignments
12
7(MSB)
7(MSB)
BIT
______________________________________________________________________________________
BIT
6
5
4
3
2
1
0
6
5
4
3
2
1
0
OVERT Input Inhibit
Thermal Closed/
OVERT Polarity
Fan Driver Full
Remote High
Mask OVERT
Remote Low
Diode Open
ALERT Mask
Write Protect
Fan Failure
Open Loop
MAX6661
Overheat
Run/Stop
OVERT
ALERT
NAME
NAME
Output
Scale
N/A
POR STATE
POR STATE
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 MAX6661 has
overheated (temperature > +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.
When high, the remote-junction temperature exceeds the temperature in the
remote high register.
When low, the remote-junction temperature is lower than the temperature in the
remote low register.
When high, the remote-junction diode is open.
When active, indicates that OVERT has been activated, regardless of cause
(internal or external).
When high, indicates the count in the fan tachometer period register is higher
than the limit set in the fan tachometer period limit register.
When set to 1, ALERT is masked from internally generated errors.
When set to 1, the MAX6661 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:
1. Configuration register bits 6, 5, 4, 3
2. T
3. T
4. Fan conversion rate register
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.
Not used.
MAX
HYST
register
register
corresponding status bit are reasserted at the end of
the next conversion.
When autoconverting, if the T
close together, it is possible for both high-temperature
and low-temperature status bits to be set, depending
DESCRIPTION
DESCRIPTION
HIGH
and T
LOW
limits are