DataSheet.jp

LM41 の電気的特性と機能

LM41のメーカーはNational Semiconductorです、この部品の機能は「Hardware Monitor with Thermal Diode Inputs and SensorPath Bus」です。


製品の詳細 ( Datasheet PDF )

部品番号 LM41
部品説明 Hardware Monitor with Thermal Diode Inputs and SensorPath Bus
メーカ National Semiconductor
ロゴ National Semiconductor ロゴ 




このページの下部にプレビューとLM41ダウンロード(pdfファイル)リンクがあります。

Total 27 pages

No Preview Available !

LM41 Datasheet, LM41 PDF,ピン配置, 機能
May 2004
LM41
Hardware Monitor with Thermal Diode Inputs and
SensorPathBus
General Description
The LM41 is a hardware monitor that measures 2 tempera-
ture zones, 5 voltages and has a single-wire interface com-
patible with National Semiconductor’s SensorPath bus. Sen-
sorPath data is pulse width encoded, thereby allowing the
LM41 to be easily connected to many general purpose
micro-controllers. Several National Semiconductor Super I/O
products include a fully integrated SensorPath master, that
when connected to the LM41 can realize a hardware monitor
function that includes limit checking for measured values,
autonomous fan speed control and many other functions.
The LM41 measures the temperature of its own die as well
as one external device such as a processor thermal diode or
a diode connected transistor. The LM41 can resolve tem-
peratures up to 255˚C and down to -256˚C. The operating
temperature range of the LM41 is 0˚C to +125˚C. Using Σ∆
ADC it measures +1.2V, +2.5V, +3.3V, +5V and +12V analog
input voltages with internal scaling resistors. The address
programming pin allows two LM41’s to be placed on one
SensorPath bus.
Features
n SensorPath Interface
— 2 hardware programmable addresses
n Voltage Monitoring
— 9-bit Σ∆ ADC
— Internal scaling resistors for all inputs
— Monitors +1.2V, +2.5 V, +3.3 V, +5 V and +12 V
n Temperature Sensing
— Remote diode temperature sensor zone
— Internal local temperature zone
— 0.5 ˚C resolution
— Measures temperatures up to 140 ˚C
n 14-lead TSSOP package
Key Specifications
n Voltage Measurement Accuracy
n Temperature Sensor Accuracy
n Temperature Range:
— LM41 junction
— Remote Temp Accuracy
n Power Supply Voltage
n Average Power Supply Current
n Conversion Time (all Channels)
±2 % (max)
±3 ˚C (max)
0 ˚C to +85 ˚C
0 ˚C to +100 ˚C
+3.0 V to +3.6 V
0.5 mA (typ)
22.1ms to 1456ms
Applications
n Microprocessor based equipment
(Motherboards, Video Cards, Base-stations, Routers,
ATMs, Point of Sale, …)
n Power Supplies
Typical Application
SensorPathis a trademark of National Semiconductor Corporation
© 2004 National Semiconductor Corporation DS200703
20070301
www.national.com

1 Page





LM41 pdf, ピン配列
Block Diagram
20070303
3 www.national.com


3Pages


LM41 電子部品, 半導体
AC Electrical Characteristics (Continued)
The following specification apply for V+ = +3.0 VDC to +3.6 VDC, unless otherwise specified. Boldface limits apply for
TA = TJ = TMIN=0˚C to TMAX=85˚C; all other limits TA = TJ = 25˚C. The SensorPath Characteristics conform to the SensorPath
specification revision 0.98. Please refer to that speciation for further details.
Symbol
Parameter
Conditions
Typical Limits
Units
(Note 7) (Note 8) (Limits)
SensorPath Bus CHARACTERISTICS
tf SWD fall time (Note 16)
tr SWD rise time (Note 16)
tINACT
Minimum inactive time (bus at high level)
guaranteed by the slave before an attention
request
Rpull-up=1.25 k±30%,
CL=400 pF
Rpull-up=1.25 k±30%,
CL=400 pF
300 ns (max)
1000 ns (max)
11 µs (min)
tMtr0 Master drive for Data Bit 0 write and for Data
Bit 0-1read
11.8
17.0
µs (min)
µs (max)
tMtr1 Master drive for Data Bit 1 write
35.4
48.9
µs (min)
µs (max)
tSFEdet
tSLout1
Time allowed for LM41 activity detection
LM41 drive for Data Bit 1 read by master
9.6
28.3
38.3
µs (max)
µs (min)
µs (max)
tMtrS
Master drive for Start Bit
80 µs (min)
109 µs (max)
tSLoutA
LM41 drive for Attention Request
165 µs (min)
228 µs (max)
tRST
tRST_MAX
Master or LM41 drive for Reset
Maximum drive of SWD by an LM41, after the
power supply is raised above 3V
354 µs (min)
500 ms (max)
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed
specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test
conditions.
Note 2: All voltages are measured with respect to GND, unless otherwise noted.
Note 3: When the input voltage (VIN) at any pin exceeds the power supplies (VIN < GND or VIN > V+), the current at that pin should be limited to 5 mA. Parasitic
components and/or ESD protection circuitry are shown below for the LM41’s pins. The nominal breakdown voltage of the zener is 6.5 V. SNP stands for snap-back
device.
www.national.com
6

6 Page



ページ 合計 : 27 ページ
 
PDF
ダウンロード
[ LM41 データシート.PDF ]


データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。


共有リンク

Link :


部品番号部品説明メーカ
LM40

Hardware Monitor with Dual Thermal Diodes and SensorPath Bus

National Semiconductor
National Semiconductor
LM40

Diode (spec sheet)

American Microsemiconductor
American Microsemiconductor
LM40044A

4.00 inch 4x4 Dot Matrix LED Display

LIGHTKEY
LIGHTKEY
LM4024-11EWRN

(LM40xx-xxx) 0.4 Four Digital Display

Ledtech Electronics
Ledtech Electronics


www.DataSheet.jp    |   2020   |  メール    |   最新    |   Sitemap