- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358877 > LM87 (National Semiconductor Corporation) Serial Interface System Hardware Monitor with Remote Diode Temperature Sensing PDF資料下載
參數(shù)資料
| 型號： | LM87 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Serial Interface System Hardware Monitor with Remote Diode Temperature Sensing |
| 中文描述： | 串行接口系統(tǒng)硬件監(jiān)控與遠程二極管溫度傳感器 |
| 文件頁數(shù)： | 22/32頁 |
| 文件大?。?/td> | 470K |
| 代理商： | LM87 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁當前第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
Functional Description
(Continued)
input Interrupt Status Bit and will cause AOUT to go to full
scale, regardless of the state of the THERM# Input Interrupt
Mask bit. If the Mask bit is cleared and INT# is enabled, an
INT# will be generated. The THERM# input function is not
affected by the THERM# operating mode.
9.4 Fault Queue
A Fault Queue is incorporated in the external temperature
monitoring sections of the LM87. This serves as a filter to
minimize false triggering caused by short duration or tran-
sient temperature events. The Fault Queue adds a counter
between the comparison logic and the Interrupt Status Reg-
ister and THERM# output circuitry. The Fault Queue has a
depth of 3, so three consecutive readings outside of limits is
required to set an external temperature Interrupt Status Bit
or generate a THERM# output. When the monitored tem-
perature is returning within limits, only one conversion within
limits is required to clear the status bit. In other words, the
fault queue is only active when travelling outside of the limits,
not when returning back within limits.
10.0 RESET
#
I/O
RESET
#
is intended to provide a master reset to devices
connected to this line. Setting Bit 4 in Configuration Register
1 high outputs a 20 ms (minimum) low pulse on this line, at
the end of which Bit 4 in the Configuration Register automati-
cally clears. Again, the label for this pin is only its suggested
use. In applications where the RESET
#
capability is not
needed it can be used for any type of digital control that
requires a 20 ms (mimimum) active low, open-drain output.
RESET
#
operates as an input when not activated by Con-
figuration Register 1. Setting this line low will reset all of the
registers in the LM87 to their power on default state. All
Value RAM locations will not be affected except for the DAC
Data Register.
11.0 NAND TREE TESTS
A NAND tree is provided in the LM87 for Automated Test
Equipment (ATE) board level connectivity testing. DACOut/
NTEST_IN, INT#, THERM
#
, V
+
and GND pins are excluded
from NAND tree testing. Taking DACOut/NTEST_IN high
during power up activates the NAND Tree test mode. After
the first SMBus access to the LM87 the NAND Tree test
mode is terminated and cannot be reactivated without re-
peating the power up sequence. To perform a NAND tree
test, all pins included in the NAND tree should be driven to 1
forcing theADD/NTEST_OUT high. Each individual pin start-
ing with SMBData and concluding with RESET# (excluding
DACOut/NTEST_IN, INT#, THERM
#
, V
+
and GND) can be
taken low with the resulting toggle observed on the ADD/
NTEST_OUT pin. Allow for a typical propagation delay of
500 ns.
10099532
FIGURE 11. LM87 Interrupt Structure
L
www.national.com
22
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM89 | 【0.75∑C Accurate, Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface |
| LM8M64 | Color STN LCD Module |
| LM8V302 | Color STN-LCD Module(Handheld PC) |
| LM8V30 | Color STN-LCD Module(Handheld PC) |
| LM8V311 | DEVlCESPECIFICATIONfoor for Passive Matrix Color LCD Module (640 X 480 dots) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM87CIMT | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM87CIMT | 制造商:Texas Instruments 功能描述:HDW MON, 2 REMOTE TEMP SENS, SMD 制造商:Texas Instruments 功能描述:HDW MON, 2 REMOTE TEMP SENS, SMD; IC Output Type:Voltage; Sensing Accuracy Range: 3C; Sensing Temperature Min:-40C; Sensing Temperature Max:+125C; Supply Voltage Min:2.8V; Supply Voltage Max:3.8V; Sensor Case Style:TSSOP; No. of ;RoHS Compliant: Yes |
| LM87CIMT/NOPB | 功能描述:板上安裝溫度傳感器 Hdw Mon & 2 Remote Temp Sens RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM87CIMTX | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM87CIMTX/NOPB | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
發(fā)布緊急采購，3分鐘左右您將得到回復。