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參數(shù)資料
| 型號： | LM78 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Microprocessor System Hardware Monitor |
| 中文描述： | 微處理器系統(tǒng)硬件監(jiān)視器 |
| 文件頁數(shù)： | 1/31頁 |
| 文件大?。?/td> | 424K |
| 代理商： | LM78 |
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LM78
Microprocessor System Hardware Monitor
General Description
The LM78 is a highly integrated Data Acquisition system for
hardware monitoring of servers, Personal Computers, or
virtually any microprocessor based system. In a PC, the
LM78 can be used to monitor power supply voltages, tem-
peratures, and fan speeds. Actual values for these inputs
can be read at any time, and programmable WATCHDOG
limits in the LM78 activate a fully programmable and
maskable interrupt system with two outputs.
The LM78 has an on-chip temperature sensor, 5 positive
analog inputs, two inverting inputs (for monitoring negative
voltages), and an 8-bit ADC. An input is provided for the
overtemperature outputs of additional temperature sensors
and this is linked to the interrupt system. The LM78 provides
inputs for three fan tachometer outputs. Additional inputs are
provided for Chassis Intrusion detection circuits, VID monitor
inputs, and chainable interrupt. The LM78 provides both ISA
and Serial Bus interfaces. A 32-byte auto-increment RAM is
provided for POST (Power On Self Test) code storage.
Applications
n
System Hardware Monitoring for Servers and PCs
n
Office Electronics
n
Electronic Test Equipment and Instrumentation
Features
n
Temperature sensing
n
5 positive voltage inputs
n
2 op amps for negative voltage monitoring
n
3 fan speed monitoring inputs
n
Input for additional temperature sensors
n
Chassis Intrusion Detector input
n
WATCHDOG comparison of all monitored values
n
POST code storage RAM
n
ISA and I
2
C
Serial Bus interfaces
Key Specifications
j
Voltage monitoring
accuracy
j
Temperature Accuracy
10C to +100C
j
Supply Voltage
j
Supply Current
±
1% (max)
±
3C (max)
5V
Operating:
Shutdown:
1 mA typ
10 μA typ
8 Bits
j
ADC Resolution
Typical Application
I2C
is a registered trademark of the Phillips Corporation.
DS012873-1
#
indicates Active Low (”Not“)
February 2000
L
2001 National Semiconductor Corporation
DS012873
www.national.com
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| LM78CCVF | Microprocessor System Hardware Monitor |
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| LM79CCVF | Microprocessor System Hardware Monitor |
| LM79 | |
| LM81CIMTX-32 | Serial Interface ACPI-Compatible Microprocessor System |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM780 | 制造商:LM TECHNOLOGIES 功能描述:MODULE BT2.1 CLASS1 CSR BC04 W/ANT 制造商:LM TECHNOLOGIES 功能描述:MODULE, BT2.1 CLASS1, CSR BC04 W/ANT |
| LM7800 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:3-Terminal Positive Regulators(324.81 k) |
| LM7800-220M | 制造商:SEME-LAB 制造商全稱:Seme LAB 功能描述:POSITIVE VOLTAGE REGULATOR TO 220 M |
| LM7800C | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Series 3-Terminal Positive Regulators |
| LM7800-SMD | 制造商:SEME-LAB 制造商全稱:Seme LAB 功能描述:POSITIVE VOLTAGE REGULATOR TO 220 M |
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