LM79CCVF ,Microprocessor System Hardware MonitorLM79 Microprocessor System Hardware MonitorFebruary 2000LM79Microprocessor System Hardware Monitor
LM79L ,Series 3-Terminal Negative RegulatorsApplications ConnectionDiagramsFixedOutputRegulator SO-8Plastic(NarrowBody)TL/H/7748–4TopViewTL/H/7 ..
LM79L05A ,3-Terminal 0.1A Negative Voltage RegulatorElectrical Characteristics(MC79L05A/LM79L05A)(V = -10V, I = 40mA, C = 0.33µ F, C = 0.1µ F, 0°C ≤T ≤ ..
LM79L05A ,3-Terminal 0.1A Negative Voltage RegulatorBlock DiagramOutputInputRev. 1.0.12001 Fairchild Semiconductor CorporationMC79LXXA/LM79LXXAAbsolute ..
LM79L05A ,3-Terminal 0.1A Negative Voltage RegulatorFeatures Description• Output current up to 100mA These regulators employ internal current limiting ..
LM79L05ACM ,Series 3-Terminal Negative RegulatorsGeneral Descriptionmicro SMD package. The LM320L series is available in theThe LM320L/LM79LXXAC dua ..
LP5996SD-2828 , Dual Linear Regulator with 300mA and 150mA Outputs
LP5996SD-3333 , Dual Linear Regulator with 300mA and 150mA Outputs
LP61L1024X-12 , 128K X 8 BIT 3.3V HIGH SPEED LOW VCC CMOS SRAM
LP61L256BS-12 , 32K X 8 Bit High SPEED LOW VCC CMOS SRAM
LP61L256CS-12 , 32K X 8 BIT HIGH SPEED CMOS SRAM
LP621024D-55LL , 128K X 8 BIT CMOS SRAM
LM79CCVF
Microprocessor System Hardware Monitor
LM79
Microprocessor System Hardware Monitor
General DescriptionThe LM79isa highly integrated Data Acquisition systemfor
hardware monitoringof servers, Personal Computers,or
virtually any microprocessor based system.Ina PC, the
LM79 canbe usedto monitor power supply voltages, tem-
peratures, and fan speeds. Actual valuesfor these inputs
canbe readat any time, and programmable WATCHDOG
limitsin the LM79 activatea fully programmable and
maskable interrupt system with two outputs.
The LM79 hasan on-chip temperature sensor,5 positive
analog inputs, two inverting inputs (for monitoring negative
voltages), andan 8-bit ADC.An inputis providedfor the
overtemperature outputsof additional temperature sensors
and thisis linkedtothe interrupt system. The LM79 provides
inputsfor threefan tachometer outputs. Additional inputs are
providedfor Chassis Intrusion detection circuits,5 VID moni-
tor inputs, and chainable interrupt. The LM79 provides both
ISA and Serial Bus interfaces.A 32-byte auto-increment
RAMis providedfor POST (PowerOn Self Test) code stor-
age.
Comparedto the LM78, the LM79 has the following differ-
ences: an additional VID inputpin an additional registerfor device identification open drain Power Switch Bypass Output
Features Temperature sensing5 positive voltage inputs2op ampsfor negative voltage monitoring3fan speed monitoring inputs Inputfor additional temperature sensors Chassis Intrusion Detector input WATCHDOG comparisonofall monitored values POST code storage RAM ISA andI2C™ Serial Bus interfaces
Key Specifications Voltage monitoring
accuracy
±1% (max) Temperature Accuracy
−10˚Cto +100˚C ±3˚C (max) Supply Voltage 5V Supply Current Operating: 1 mAtyp
Shutdown: 10μAtyp ADC Resolution 8 Bits
Applications System Hardware Monitoringfor Servers and PCs Office Electronics Electronic Test Equipment and Instrumentation
Ordering Information
Temperature Range Package−10˚C≤
TA≤
+100˚C
Order Number Device MarkingLM79CCVF LM79CCVF VGZ44A Indicates Active Low (“Not”)
Connection DiagramDS100036-2
February 2000
LM79
Microprocessor
System
Hardware
Monitor
