Intel 82540EP manual Thermal Specifications, Thermal Characteristics

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Networking Silicon — 82540EP

5.3Thermal Specifications

The 82540EP device is specified for operation when the ambient temperature (TA) is within the range of 0° C to 70° C.

TC (case temperature) is calculated using the equation:

TC = TA + P (θ JA - q JC)

TJ (junction temperature) is calculated using the equation:

TJ = TA + P θ JA

P (power consumption) is calculated by using the typical ICC, as indicated inTable 4 of Section 4.0, and nominal VCC. The thermal resistances are shown in Table 18.

Table 18. Thermal Characteristics

	Symbol	Parameter	Value at specified airflow (m/s)				Units
	Symbol	Parameter					Units
			0	1	2	3

	θ JA	Thermal resistance, junction-to-ambient	28.1	25.0	23.7	22.8	°C/
	θ JA	Thermal resistance, junction-to-ambient	28.1	25.0	23.7	22.8	Watt
							Watt

	θ JC	Thermal resistance, junction-to-case	6.1	6.1	6.1	6.1	°C/
	θ JC	Thermal resistance, junction-to-case	6.1	6.1	6.1	6.1	Watt
							Watt

Thermal resistances are determined empirically with test devices mounted on standard thermal test boards. Real system designs may have different characteristics due to board thickness, arrangement of ground planes, and proximity of other components. The case temperature measurements should be used to assure that the 82540EP device is operating under recommended conditions.

Datasheet

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Contents Revision April 82540EP Gigabit Ethernet ControllerDatasheet Date Revision 82540EP Networking Silicon Contents 82540EP Networking Silicon Introduction Acpi LED MdioTX MAC RX MACProduct Code Document ScopeReference Documents 82540EP Networking Silicon Application flexibility for LAN on Motherboard PCI FeaturesMAC Specific Features Features BenefitsHostOffloading PHY Specific FeaturesA server management processor Manageability FeaturesTechnology Features Additional Device FeaturesPCI Bus Interface Signal Type DefinitionsPCI Address, Data and Control Signals Symbol Type Name and FunctionTRDY# STS PARFRAME# STS IRDY# STSError Reporting Signals Arbitration SignalsInterrupt Signal System SignalsSMB Signals Eeprom and Serial Flash Interface SignalsPower Management Signals Impedance Compensation SignalsOther Signals Miscellaneous SignalsLED Signals XTAL2 AnalogXTAL1 Analog Supplies Test Interface SignalsPower Supply Connections Digital SuppliesCTRL15 Control SignalsGround and No Connects GNDRecommended Operating Conditions a Sheet 1 Absolute Maximum RatingsRecommended Operating Conditions Absolute Maximum RatingsaRecommended Operating Conditions a Sheet 2 DC SpecificationsDC Characteristics Power Specifications D0aPower Specifications Complete Subsystem Power Specifications D3coldPower Specifications Dr Uninitialized = V SS O CharacteristicsSymbol Parameter Condition Min Typ Max AC Characteristics Tcyc Timing Specifications PCI Bus InterfaceSymbol Parameter a PCI 66 MHz PCI 33 MHz Units Min Max PCI Bus Interface Clock ParametersPCI Bus Interface Timing Parameters Symbol Parameter PCI 66MHz PCI 33 MHz Units Min MaxVTL Symbol Parameter PCI 66 MHz UnitPCI Bus Interface Timing Measurement Conditions VTHInch max Point 50 pF PinInch max Point 1kΩ 10 pF Rise and Fall Times Link Interface TimingEeprom Interface Date Code Device Identification82540EP Product Name YywwPackage Information DatasheetThermal resistance, junction-to-ambient Thermal SpecificationsThermal Characteristics Symbol Parameter Value at specified airflow m/s UnitsPinout Information Eeprom and Serial Flash Interface Signals Power Management SignalsImpedance Compensation Signals SMB SignalsAnalog Power Signals PHY SignalsTest Interface Signals Digital Power SignalsLanpwrgood Smbclk Grounds and No Connect SignalsSignal Names in Pin Order Sheet 1 Signal Name PinCLKRUN# Smbdata GND Signal Names in Pin Order Sheet 2RST# SMBALRT# M66EN REQ# CBE3#CLK VIO TRDY# Zpcomp Signal Names in Pin Order Sheet 3IRDY# FRAME# CBE2# GND PAR PERR# GNT# Signal Names in Pin Order Sheet 4STOP# INTA# DEVSEL# Zncomp CBE0# PCIAD5 GND PCIAD1 Clkview FLCE# Eesk Signal Names in Pin Order Sheet 5CBE1# Vddo P12 Signal Names in Pin Order Sheet 6PCIAD9 PCIAD7 PCIAD4 PCIAD8 PCIAD6 PCIAD3 PCIAD2 Eecs GND Flso EediC D E F G H J K L M N P Visual Pin Reference