MAX6664AEE+ Maxim Integrated Products, MAX6664AEE+ Datasheet - Page 21

• 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

the highest expected temperature must be greater than
0.25V at 10µA, and at the lowest expected tempera-
ture, the forward voltage must be less than 0.95V at
100µA. Large power transistors must not be used. Also,
ensure that the base resistance is less than 100Ω. Tight
specifications for forward current gain (50 < ß <150, for
example) indicate that the manufacturer has good
process controls and that the devices have consistent
V
BE
characteristics.
THERM SIGNAL
10kΩ
TO THROTTLE
FAN-FAILURE
______________________________________________________________________________________
FAN _FAULT
CPU CLOCK
TO SIGNAL
CONDITION
+3.3V
10kΩ
10kΩ
+5V
+3.3V
+3.3V
+3.3V
3-WIRE
NDT3055L
FAN
10kΩ
+3.3V
1
2
3
4
5
6
7
8
TACH/AIN
CRIT0
CRIT1
V
THERM
FAN_FAULT
PWM_OUT
GND
CC
Temperature Monitors and
MAX6653
Manufacturers of discrete transistors do not normally
specify or guarantee ideality factor. This is normally not
a problem since good-quality discrete transistors tend
to have ideality factors that fall within a relatively narrow
range. We have observed variations in remote tempera-
ture readings of less than ±2°C with a variety of dis-
crete transistors. Still, it is sound design practice to
verify good consistency of temperature readings with
several discrete transistors from any manufacturer
under consideration.
SMBDATA
SMBCLK
PWM Fan Controllers
ADD
DXN
SDR
SDL
DXP
INT
15
14
11
16
13
12
10
9
2.2kΩ
2.2nF
Typical Operating Circuits
+3.3V
+3.3V
10kΩ
10kΩ
2.2kΩ
CPU
+3.3V
+3.3V
CLOCK
DATA
INTERRUPT
TO µC
SYSTEM
SHUTDOWN
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