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MAX6639F Datasheet(PDF) 13 Page - Maxim Integrated Products

Part No. MAX6639F
Description  Evaluation Kit
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
Logo MAXIM - Maxim Integrated Products

MAX6639F Datasheet(HTML) 13 Page - Maxim Integrated Products

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Detailed Description of Hardware
The MAX6639 EV kit is an assembled and tested PCB
used to evaluate the MAX6639 dual-temperature sen-
sor/fan controller. The MAX6639 monitors its own die
temperature and the junction temperature of one exter-
nal diode-connected transistor, or the junction tempera-
tures of two external diode-connected transistors. It
converts the temperature to 8-bit or 11-bit 2-wire serial
data that can be accessed over a 2-wire serial bus.
Slave Address
The slave address can be changed by moving jumper
JU5. See Table 1 for address selection.
3-Wire and 4-Wire Fan Configurations
The MAX6639 EV kit is configured for a 3-wire fan by
default when the shunts are placed in the 1-2 position
of jumpers JU6 and JU7.
For 4-wire fan configuration, the user must move the
shunts to the 2-3 position of jumpers JU6 and JU7.
Replacing Diodes
Jumpers JU11 and JU12 connect the 2N3906 transistor
as the external diodes. To use different diodes, cut the
trace, short the two pins of JU11 and JU12, and con-
nect the diodes (through twisted-pair wire) to the DXP1,
DXN, and DXP2 pads.
User-Supplied I2C Interface
To use the MAX6639 with a user-supplied I2C interface,
first move JU2, JU3, and JU4 to the 2-3 position. Then,
connect SCL, SDA, and
ALERT to the corresponding
pads on the MAX6639 EV kit.
User-Supplied Power Supply
The MAX6639 EV kit is powered completely from the
USB port by default. Move the shunt of JU1 to the 2-3
position and apply a user-supplied 3.0V to 3.6V power
supply at the EXT_VIN and GND pads.
The fan supply is provided by the user and varies
depending on different fans.
MAX6639 Evaluation Kit
______________________________________________________________________________________
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