{"product_id":"sn74ls640n3","title":"SN74LS640N3","description":"\u003cp\u003eThe SN74LS640N3 is an octal inverting transceiver from the 74LS family, featuring 3-state outputs for bidirectional bus communication. Operating from 4.75V to 5.25V, it provides 15mA source and 24mA sink current, ensuring robust drive for data lines. The inverting function is ideal for systems requiring signal polarity inversion. Housed in a 20-DIP package, this transceiver is well-suited for legacy TTL designs, industrial controls, and microprocessor-based systems where reliable data transfer is essential.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHigh Sink Current (24mA): Drives heavy bus loads and long traces without signal degradation.\u003c\/li\u003e\n\u003cli\u003eBidirectional Operation: Simplifies data flow control in microprocessor and memory systems.\u003c\/li\u003e\n\u003cli\u003e3-State Outputs: Prevents bus contention when multiple devices share the same lines.\u003c\/li\u003e\n\u003cli\u003eThrough-Hole DIP Package: Easy to prototype and service in legacy equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBidirectional Bus Transceivers\u003c\/h3\u003e\u003cp\u003eThe SN74LS640N3 is designed for bidirectional data transfer between two buses. Its inverting nature is useful in systems where signal polarity inversion is required.\u003c\/p\u003e\u003ch3\u003eMemory Data Bus Isolation\u003c\/h3\u003e\u003cp\u003eIn microprocessor systems, this transceiver isolates the data bus from memory during read\/write cycles, preventing data corruption and improving signal integrity.\u003c\/p\u003e\u003ch3\u003ePeripheral Interface in Legacy TTL Systems\u003c\/h3\u003e\u003cp\u003eWith 24mA sink capability, it can drive long cable runs or multiple peripheral loads in industrial equipment, maintaining signal strength over distance.\u003c\/p\u003e\u003ch3\u003eLevel Shifting in Mixed-Logic Environments\u003c\/h3\u003e\u003cp\u003eWhile designed for 5V, the 74LS family can interface with older 3.3V logic when pull-ups are used, making it a bridge in legacy systems.\u003c\/p\u003e\u003ch3\u003eControl Signal Distribution in Test Equipment\u003c\/h3\u003e\u003cp\u003eThe 3-state outputs allow test equipment to share control lines with multiple instruments, enabling automated test setups without bus conflicts.\u003c\/p\u003e\u003ch3\u003eData Acquisition Systems\u003c\/h3\u003e\u003cp\u003eUse this transceiver to route analog-to-digital converter data to a processor, with the inverting function simplifying logic polarity matching.\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\u003eTexas Instruments\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eProduct Series\u003c\/td\u003e \t\u003ctd\u003e\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\u003eTransceiver, Inverting\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eNumber of Elements\u003c\/td\u003e \t\u003ctd\u003e1\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eNumber of Bits per Element\u003c\/td\u003e \t\u003ctd\u003e8\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\u003e15mA, 24mA\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eVoltage - Supply\u003c\/td\u003e \t\u003ctd\u003e4.75V ~ 5.25V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eOperating Temperature\u003c\/td\u003e \t\u003ctd\u003e0°C ~ 70°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\u003eThrough Hole\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003ePackage \/ Case\u003c\/td\u003e \t\u003ctd\u003e20-DIP (0.300\", 7.62mm)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eSupplier Device Package\u003c\/td\u003e \t\u003ctd\u003e20-DIP (0.300\", 7.62mm)\u003c\/td\u003e \u003c\/tr\u003e  \u003c\/tbody\u003e\n\u003c\/table\u003e\u003cdl\u003e\n\u003cdt\u003eQ: What is the logic family of the SN74LS640N3?\u003c\/dt\u003e\n\u003cdd\u003eA: It is from the 74LS (Low-Power Schottky) family, known for its speed and low power consumption.\u003c\/dd\u003e\n\u003cdt\u003eQ: What is the function of this IC?\u003c\/dt\u003e\n\u003cdd\u003eA: It is an octal (8-bit) inverting transceiver with 3-state outputs, allowing bidirectional data flow.\u003c\/dd\u003e\n\u003cdt\u003eQ: What is the operating voltage range?\u003c\/dt\u003e\n\u003cdd\u003eA: It operates from 4.75V to 5.25V, ideal for standard 5V TTL systems.\u003c\/dd\u003e\n\u003cdt\u003eQ: What is the output type?\u003c\/dt\u003e\n\u003cdd\u003eA: The outputs are 3-state, enabling bus-oriented applications with high-impedance control.\u003c\/dd\u003e\n\u003cdt\u003eQ: What package is available?\u003c\/dt\u003e\n\u003cdd\u003eA: It comes in a 20-DIP (0.300\", 7.62mm) package, suitable for through-hole mounting.\u003c\/dd\u003e\n\u003cdt\u003eQ: What is the output current capability?\u003c\/dt\u003e\n\u003cdd\u003eA: It can sink 24mA and source 15mA, providing strong drive for bus lines.\u003c\/dd\u003e\n\u003c\/dl\u003e","brand":"Texas Instruments","offers":[{"title":"Default Title","offer_id":53665877131553,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/hqickey.com\/products\/sn74ls640n3","provider":"HQICKEY","version":"1.0","type":"link"}