Details, datasheet, quote on part number: 74F540
CategoryLogic => Bus Interface => Bus Oriented Circuits
TitleBus Oriented Circuits
DescriptionOctal Buffer/line Driver With 3-STATE Outputs (Inverting)
CompanyFairchild Semiconductor
DatasheetDownload 74F540 datasheet
Cross ref.Similar parts: SN74F540DW, SN74F540DWR, SN74F540N
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Features, Applications

The 74F540 and 74F541 are similar in function to the 74F240 and 74F244 respectively, except that the inputs and outputs are on opposite sides of the package (see Connection Diagrams). This pinout arrangement makes these devices especially useful as output ports for microprocessors, allowing ease of layout and greater PC board density.


s 3-STATE outputs drive bus lines s Inputs and outputs opposite side of package, allowing easier interface to microprocessors

Order Number 74F541SJ 74F541PC Package Number M20D N20A Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.

U.L. Pin Names OE2 In On, On Description HIGH/LOW 3-STATE Output Enable Input (Active LOW) Inputs Outputs 1.0/1.0 Input IIH/IIL Output IOH/IOL A/-0.6 mA

H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance

Storage Temperature Ambient Temperature under Bias Junction Temperature under Bias VCC Pin Potential to Ground Pin Input Voltage (Note 2) Input Current (Note 2) Voltage Applied to Output in HIGH State (with VCC = 0V) Standard Output 3-STATE Output Current Applied to Output in LOW State (Max) twice the rated IOL (mA)

Note 1: Absolute maximum ratings are values beyond which the device may be damaged or have its useful life impaired. Functional operation under these conditions is not implied. Note 2: Either voltage limit or current limit is sufficient to protect inputs.

Symbol VIH VIL VCD VOH Parameter Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage Output HIGH Voltage VOL IIH IBVI ICEX VID IOD IIL IOZH IOZL IOS IZZ ICCH ICCL ICCZ ICCH ICCL ICCZ Output LOW Voltage Input HIGH Current Input HIGH Current Breakdown Test Output HIGH Leakage Current Input Leakage Test Output Leakage Circuit Current Input LOW Current Output Leakage Current Output Leakage Current Output Short-Circuit Current Bus Drainage Test Power Supply Current (74F540) Power Supply Current (74F540) Power Supply Current (74F540) Power Supply Current (74F541) Power Supply Current (74F541) Power Supply Current (74F541) VCC 10% VCC 5% VCC 10% VCC A mA Min Max 0.0 Max 0.0V Max V Min 0.8 -1.2 Typ Max Units V Min VCC Conditions Recognized as a HIGH Signal Recognized as a LOW Signal IIN -18 mA IOH -3 mA IOH -15 mA IOH -3 mA IOL 64 mA VIN = 2.7V VIN = 7.0V VOUT = VCC IID 1.9 A All Other Pins Grounded VIOD 150 mV All Other Pins Grounded VIN = 0.5V VOUT = 2.7V VOUT = 0.5V VOUT = 0V VOUT VO = HIGH VO = LOW VO = HIGH VO = HIGH VO = LOW VO = HIGH Z


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