Chip information, Typical operating circuit, Pin configurations – Rainbow Electronics MAX6670 User Manual
Page 6
MAX6668/MAX6670
other traces carrying high-frequency noise signals
does not help reduce EMI.
The MAX6668/MAX6670s’ PGND is the ground return
for the fan driver. Bypass V
DD
to GND with a 1µF
capacitor located as close to V
DD
as possible. Add
additional bypass capacitors for long V
DD
and GND
lines.
Chip Information
TRANSISTOR COUNT: 8113
PROCESS: BiCMOS
Remote Temperature Switches with Integrated
Fan Controller/Driver
6
_______________________________________________________________________________________
GND
DXP
DXN
GND
10MILS
10MILS
10MILS
MINIMUM
10MILS
Figure 2. Recommended DXP/DXN PC Traces
TRIP TEMPERATURE
TRIP TEMPERATURE
– HYSTERESIS
TIME
MAX6668
MAX6670
FANOUT
Figure 1. Temperature Trip Threshold Hysteresis
DXP
GND
PGND
HYST
V
DD
+4.5V TO +12V
MAX6670
FORCEON
FANOUT
WARN
OT
V
DD
V
DD
DXN
V
DD
+3V TO +3.6V
CPU
Typical Operating Circuit
V
DD
GND
DXN
1
2
8
7
FANOUT
GND
FORCEON
DXP
PGND
µMAX
TOP VIEW
3
4
6
5
MAX6668
1
2
3
4
5
10
9
8
7
6
FANOUT
HYST
V
DD
GND
DXN
DXP
PGND
MAX6670
µMAX
OT
FORCEON
WARN
Pin Configurations