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LM64CILQX-F Datasheet

  • LM64CILQX-F

  • 【1∑C Remote Diode Temperature Sensor with PWM Fan Control ...

  • 371.58KB

  • 29頁(yè)

  • NSC

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LM64
鹵
1藲C Remote Diode Temperature Sensor with PWM Fan Control and 5 GPIO鈥檚
December 2003
LM64
鹵
1藲C Remote Diode Temperature Sensor with PWM Fan
Control and 5 GPIO鈥檚
General Description
The LM64 is a remote diode temperature sensor with PWM
fan control. The LM64 accurately measures its own tempera-
ture and that of a remote diode. The LM64 remote tempera-
ture accuracy is factory trimmed for a MMBT3904 diode-
connected transistor with a 16藲C offset for high
temperatures. T
ACTUAL DIODE JUNCTION
= T
LM64
+ 16藲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.
Key Specifications
n
Remote Diode Temperature Accuracy (includes
quantization error)
Ambient Temp
30藲C to 50藲C
0藲C to 85藲C
Diode Temp
120藲C to 140藲C
25藲C to 140藲C
Max Error
鹵
1.0藲C (max)
鹵
3.0藲C (max)
n
Local Temp Accuracy (includes quantization error)
Ambient Temp
25藲C to 125藲C
n
Power Supply Requirements
Max Error
鹵
3.0藲C (max)
Features
n
n
n
n
n
n
n
n
n
n
Accurately senses remote and local diode temperatures
Integrated PWM fan speed control output
Programmable 8-step Lookup Table for quieting fans
ALERT and T_Crit open-drain outputs
Tachometer input for measuring fan RPM
10 bit plus sign remote diode temperature data format,
with 0.125藲C resolution
SMBus 2.0 compatible interface, supports TIMEOUT
5 General Purpose Input/Output pins
5 General Purpose Default input pins
24-pin LLP package
Supply DC Voltage
Supply DC Current
3.0 V to 3.6 V
1.1 mA (typ)
Applications
n
n
n
n
n
n
Computer Processor Thermal Management
Graphics Processor Thermal Management
Voltage Regulator Modules
Electronic Instrumentation
Power Supplies
Projectors
Connection Diagram
20065501
漏 2003 National Semiconductor Corporation
DS200655
www.national.com

LM64CILQX-F 產(chǎn)品屬性

  • 4,500

  • 集成電路 (IC)

  • PMIC - 熱管理

  • -

  • 風(fēng)扇控制，溫度監(jiān)控器

  • 內(nèi)部和外部

  • 0°C ~ 85°C，外部傳感器

  • ±1°C 本地（最大），±3°C 遠(yuǎn)程（最大）

  • SMBus?

  • 是

  • 是

  • 3 V ~ 3.6 V

  • 0°C ~ 85°C

  • 表面貼裝

  • 24-WFQFN 裸露焊盤

  • 24-LLP-EP（4x5）

  • 帶卷 (TR)

  • LM64EVAL-ND - BOARD EVALUATION LM64

  • LM64CILQX-F/NOPB

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