Specification	LM64CILQ-F/NOPB

Accuracy	3 °C, 1 °C
Function	Fan Control, Temp Monitor
Mounting Type	Surface Mount
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	0 °C
Output Alarm	True
Output Fan	True
Output Type	2-Wire SMBus
Package / Case	24-WFQFN Exposed Pad
Sensing Temperature [Max]	85 °C, 140 °C
Sensing Temperature [Min]	0 °C, 25 °C
Sensor Type	Internal and External
Supplier Device Package	24-WQFN (4x5)
Topology	Register Bank, Comparator, ADC (Sigma Delta), Fan Speed Control
Voltage - Supply [Max]	3.6 V
Voltage - Supply [Min]	3 V

LM64 Series

Part	Output Fan	Package / Case	Supplier Device Package	Output Alarm	Function	Topology	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Supply [Max]	Voltage - Supply [Min]	Sensor Type	Mounting Type	Accuracy	Sensing Temperature [Min]	Sensing Temperature [Max]	Output Type	Interface	Utilized IC / Part	Sensing Range [Max]	Sensing Range [Min]	Sensitivity	Embedded	Supplied Contents
Texas Instruments LM64CILQ-F/NOPB		24-WFQFN Exposed Pad	24-WQFN (4x5)		Fan Control Temp Monitor	ADC (Sigma Delta) Comparator Fan Speed Control Register Bank	0 °C	85 °C	3.6 V	3 V	Internal and External	Surface Mount	1 °C 3 °C	0 °C 25 °C	85 °C 140 °C	2-Wire SMBus
Texas Instruments LM64EVAL									3.6 V	3 V	Fan Controller Temperature						SMBus	LM64	85 °C	0 °C	1 °C		Board(s)

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 5.76
	Digi-Reel®	1	$ 5.76
	Tape & Reel (TR)	1000	$ 2.79
Texas Instruments	SMALL T&R	1	$ 4.02
		100	$ 3.28
		250	$ 2.58
		1000	$ 2.19

Description

General part information

LM64 Series

The LM64 is a remote diode temperature sensor with PWM fan control. The LM64 accurately measures its own temperature and that of a remote diode. The LM64 remote temperature accuracy is factory trimmed for a MMBT3904 diode-connected transistor with a 16°C offset for high temperatures. TACTUAL DIODE JUNCTION = TLM64 + 16°C

The LM64 features a PWM, open-drain, fan control output, 5 GPIO (General Purpose Input/Output) and 5 GPD (General Purpose Default) pins. The 8-step Lookup Table allows for a non-linear fan speed vs. temperature transfer function often used to quiet acoustic fan noise.

Documents

Technical documentation and resources

LM64 ±1°C Remote Diode Temperature Sensor with PWM Fan Control and 5 GPIO's datasheet (Rev. B)

Data sheet