MAX6615 MAXIM [Maxim Integrated Products], MAX6615 Datasheet - Page 5

• Manufacturer Part Number: MAX6615
• Description: Dual-Channel Temperature Monitors and Fan-Speed Controllers with Thermistor Inputs
• Manufacturer: MAXIM [Maxim Integrated Products]

1, 2, 5, 20,
MAX6616
23, 24
10, 15
11
12
13
14
16
17
18
19
21
22
Fan-Speed Controllers with Thermistor Inputs
3
4
6
7
8
9
PIN
MAX6615
5, 10
11
12
13
14
15
16
—
—
—
1
2
3
4
6
7
8
9
_______________________________________________________________________________________
Dual-Channel Temperature Monitors and
FAN_FAIL
PRESET
GPIO0–
TACH1
TACH2
GPIO5
NAME
PWM1
PWM2
ADD0
ADD1
GND
N.C.
SDA
SCL
TH1
REF
TH2
V
OT
CC
Active-Low, Open-Drain GPIOs. Can be pulled up to 5.5V regardless of V
Fan Driver Output 1. The pullup resistor can be connected to a supply voltage as high as
12V, regardless of the supply voltage. See the PWM Output section for configuration.
Fan Tachometer Input. Accepts logic-level signal from fan’s tachometer output. Can be
connected to a supply voltage as high as 12V, regardless of the supply voltage.
SMBus Slave Address Selection
SMBus Slave Address Selection
Ground. Must be connected together for MAX6615.
External Thermistor Input 1. Connect a thermistor in series with a fixed resistor between
REF and ground.
No Connection
Reference Voltage Output. Provides 1V during measurements. High impedance when not
measuring.
External Thermistor Input 2. Connect a thermistor in series with a fixed resistor between
REF and ground.
Fan-Failure Output. Asserts low when either fan fails. Can be pulled up as high as 5.5V
regardless of V
Connect to GND or V
Overtemperature Output. Active low, open drain. Typically used for system shutdown or
clock throttling. Can be pulled up as high as 5.5V regardless of V
when V
Power Supply. 3.3V nominal. Bypass with a 0.1µF capacitor to GND.
SMBus Serial-Data Input/Output. Pull up with a 10kΩ resistor. Can be pulled up as high
as 5.5V regardless of V
SMBus Serial-Clock Input. Pull up with a 10kΩ resistor. Can be pulled up as high as 5.5V
regardless of V
Fan Tachometer Input. Accepts logic-level signal from fan’s tachometer output. Can be
connected to a supply voltage as high as 12V, regardless of the supply voltage.
Fan Driver Output 2. The pullup resistor can be connected to a supply voltage as high as
12V, regardless of the supply voltage. See the PWM Output section for configuration.
CC
= 0V.
CC
CC
. High impedance when V
. High impedance when V
CC
CC
to set POR state of the GPIO0.
. High impedance when V
FUNCTION
CC
CC
= 0V.
= 0V.
CC
= 0V.
Pin Description
CC
. High impedance
CC
.
5