{"product_id":"mc74hc240af","title":"MC74HC240AF","description":"\u003cp\u003eThe MC74HC240AF from onsemi is a high-speed CMOS octal inverting buffer with 3-State outputs. Operating from 2V to 6V, it provides 7.8mA of drive current per channel across two independent buffer groups. The 3-State outputs allow direct connection to shared buses, making it ideal for memory addressing, signal buffering, and industrial control applications. Its wide temperature range (-55°C to 125°C) suits demanding automotive and industrial environments. Available in a compact 20-SOIC package, this buffer simplifies PCB layout while delivering reliable performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eWide 2V to 6V Supply Range: Compatible with both 3.3V and 5V systems, simplifying mixed-voltage designs.\u003c\/li\u003e\n\u003cli\u003e3-State Outputs: Enable bus sharing and multiplexing without external isolation components.\u003c\/li\u003e\n\u003cli\u003eExtended Temperature Range (-55°C to 125°C): Suitable for automotive and industrial applications where reliability is critical.\u003c\/li\u003e\n\u003cli\u003eHigh Drive Current (7.8mA): Maintains signal integrity when driving capacitive loads or long traces.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBus Line Driving\u003c\/h3\u003e\u003cp\u003eUse the MC74HC240AF to drive high-capacitance bus lines in microprocessor systems. The 3-State outputs allow multiple devices to share the same data bus without contention, while the inverting function can be used for active-low bus signaling.\u003c\/p\u003e\u003ch3\u003eMemory Address Buffering\u003c\/h3\u003e\u003cp\u003eBuffer address lines from a microcontroller to SRAM or Flash memory. The 2V to 6V supply range ensures compatibility with both 3.3V and 5V memory devices, and the high drive current (7.8mA) maintains signal integrity over long PCB traces.\u003c\/p\u003e\u003ch3\u003eSignal Inversion and Level Shifting\u003c\/h3\u003e\u003cp\u003eUse the inverting buffers to convert positive-logic signals to active-low control signals. The wide supply range allows level shifting between 3.3V and 5V logic domains when the IC is powered from the higher voltage rail.\u003c\/p\u003e\u003ch3\u003eIndustrial Sensor Interfacing\u003c\/h3\u003e\u003cp\u003eInterface industrial sensors with open-collector outputs to a PLC or microcontroller. The 3-State outputs enable multiplexing multiple sensor signals onto a single input line, reducing I\/O requirements in control systems.\u003c\/p\u003e\u003ch3\u003eLED Display Multiplexing\u003c\/h3\u003e\u003cp\u003eDrive multiplexed LED displays in instrumentation panels. The 7.8mA output current can directly drive LEDs with current-limiting resistors, while the 3-State feature allows blanking during refresh cycles.\u003c\/p\u003e\u003ch3\u003eAutomotive ECU Signal Conditioning\u003c\/h3\u003e\u003cp\u003eBuffer and invert signals in automotive engine control units. The -55°C to 125°C temperature range ensures reliable operation under extreme under-hood conditions, and the CMOS design provides low power consumption.\u003c\/p\u003e\u003ctable\u003e\n\u003ccolgroup\u003e\u003ccol\u003e\u003c\/colgroup\u003e \u003ctbody\u003e \u003ctr\u003e \t\u003ctd\u003eProduct attributes\u003c\/td\u003e \t\u003ctd\u003eProperty Value\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eManufacturer\u003c\/td\u003e \t\u003ctd\u003eonsemi\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eProduct Series\u003c\/td\u003e \t\u003ctd\u003e74HC\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003ePackaging\u003c\/td\u003e \t\u003ctd\u003eBulk | \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003ePart Status\u003c\/td\u003e \t\u003ctd\u003eActive\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eLogic Type\u003c\/td\u003e \t\u003ctd\u003eBuffer, Inverting\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eNumber of Elements\u003c\/td\u003e \t\u003ctd\u003e2\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eNumber of Bits per Element\u003c\/td\u003e \t\u003ctd\u003e4\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eInput Type\u003c\/td\u003e \t\u003ctd\u003e-\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eOutput Type\u003c\/td\u003e \t\u003ctd\u003e3-State\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eCurrent - Output High, Low\u003c\/td\u003e \t\u003ctd\u003e7.8mA, 7.8mA\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eVoltage - Supply\u003c\/td\u003e \t\u003ctd\u003e2V ~ 6V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eOperating Temperature\u003c\/td\u003e \t\u003ctd\u003e-55°C ~ 125°C (TA)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eGrade\u003c\/td\u003e \t\u003ctd\u003e-\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eQualification\u003c\/td\u003e \t\u003ctd\u003e-\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eMounting Type\u003c\/td\u003e \t\u003ctd\u003eSurface Mount\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003ePackage \/ Case\u003c\/td\u003e \t\u003ctd\u003e20-SOIC (0.209\", 5.30mm Width)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eSupplier Device Package\u003c\/td\u003e \t\u003ctd\u003e20-SOIC\u003c\/td\u003e \u003c\/tr\u003e  \u003ctr\u003e   \u003ctd\u003eROHS\u003c\/td\u003e   \u003ctd\u003e\u003cimg class=\"ROSHICON\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0910\/9756\/3425\/files\/ROHSICON.png?v=1757832376\"\u003e\u003c\/td\u003e  \u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cdl\u003e\n\u003cdt\u003eQ: What logic family does the MC74HC240AF belong to?\u003c\/dt\u003e\n\u003cdd\u003eA: It belongs to the 74HC (High-Speed CMOS) logic family.\u003c\/dd\u003e\n\u003cdt\u003eQ: What is the function of this IC?\u003c\/dt\u003e\n\u003cdd\u003eA: It is an inverting buffer with 2 channels (octal buffer with inverting outputs).\u003c\/dd\u003e\n\u003cdt\u003eQ: What is the output type?\u003c\/dt\u003e\n\u003cdd\u003eA: It features 3-State outputs for bus-oriented applications.\u003c\/dd\u003e\n\u003cdt\u003eQ: What is the operating voltage range?\u003c\/dt\u003e\n\u003cdd\u003eA: It operates from 2V to 6V, making it compatible with TTL and CMOS logic levels.\u003c\/dd\u003e\n\u003cdt\u003eQ: What is the package type?\u003c\/dt\u003e\n\u003cdd\u003eA: It comes in a 20-SOIC (0.209\", 5.30mm Width) surface-mount package.\u003c\/dd\u003e\n\u003cdt\u003eQ: What is the output current capability?\u003c\/dt\u003e\n\u003cdd\u003eA: It can source or sink 7.8mA per output.\u003c\/dd\u003e\n\u003c\/dl\u003e","brand":"onsemi","offers":[{"title":"Default Title","offer_id":53665847607585,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/hqickey.com\/products\/mc74hc240af","provider":"HQICKEY","version":"1.0","type":"link"}