{"product_id":"sn74ls640db","title":"SN74LS640DB","description":"\u003cp\u003eThe SN74LS640DB is an 8-bit inverting transceiver from the 74LS family, featuring 3-state outputs. It operates from 4.75V to 5.25V, with 15mA sink and 24mA source current. This device is designed for bidirectional bus communication in 5V TTL systems, offering reliable signal buffering. The 20-SSOP package is compact for various applications. Typical uses include microprocessor buffering, industrial controls, and memory expansion.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLow-Power Schottky (74LS): Consumes less power than standard TTL, reducing heat.\u003c\/li\u003e\n\u003cli\u003e3-State Outputs: Enables bus multiplexing and safe disconnection.\u003c\/li\u003e\n\u003cli\u003eTTL-Compatible: Works directly with 5V TTL logic without level shifting.\u003c\/li\u003e\n\u003cli\u003eInverting Function: Provides signal inversion where required, saving external gates.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eLegacy 5V TTL Bus Interfacing\u003c\/h3\u003e\u003cp\u003eUse the SN74LS640DB to connect two 5V TTL buses with inversion, ideal for retro or industrial systems.\u003c\/p\u003e\u003ch3\u003eMicroprocessor System Buffering\u003c\/h3\u003e\u003cp\u003eBuffer address\/data lines in 5V microprocessor systems, improving fan-out and signal integrity.\u003c\/p\u003e\u003ch3\u003eIndustrial Control Logic\u003c\/h3\u003e\u003cp\u003eIn 5V industrial controllers, it can handle bidirectional communication between logic boards.\u003c\/p\u003e\u003ch3\u003eMemory Expansion Boards\u003c\/h3\u003e\u003cp\u003eFor 5V memory expansion, it buffers data lines between the CPU and additional memory chips.\u003c\/p\u003e\u003ch3\u003eTest Equipment Interfaces\u003c\/h3\u003e\u003cp\u003eIn 5V test equipment, it provides reliable data transfer between measurement modules and display units.\u003c\/p\u003e\u003ch3\u003eEducational Lab Projects\u003c\/h3\u003e\u003cp\u003eFor 5V TTL lab experiments, it demonstrates transceiver operation with 3-state control.\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\u003e74LS\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\u003eSurface Mount\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003ePackage \/ Case\u003c\/td\u003e \t\u003ctd\u003e20-SSOP (0.209\", 5.30mm Width)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eSupplier Device Package\u003c\/td\u003e \t\u003ctd\u003e20-SSOP\u003c\/td\u003e \u003c\/tr\u003e  \u003c\/tbody\u003e\n\u003c\/table\u003e\u003cdl\u003e\n\u003cdt\u003eQ: What logic family is the SN74LS640DB?\u003c\/dt\u003e\n\u003cdd\u003eA: It belongs to the 74LS family, a low-power Schottky TTL 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 transceiver with 3-state outputs, for bidirectional data flow.\u003c\/dd\u003e\n\u003cdt\u003eQ: How many channels does it have?\u003c\/dt\u003e\n\u003cdd\u003eA: It has 1 channel (8-bit) for data transmission.\u003c\/dd\u003e\n\u003cdt\u003eQ: What is the output type?\u003c\/dt\u003e\n\u003cdd\u003eA: The outputs are 3-State, allowing for bus sharing and isolation.\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, standard for 5V TTL systems.\u003c\/dd\u003e\n\u003cdt\u003eQ: What package is available?\u003c\/dt\u003e\n\u003cdd\u003eA: It comes in a 20-SSOP (0.209\", 5.30mm Width) package.\u003c\/dd\u003e\n\u003c\/dl\u003e","brand":"Texas Instruments","offers":[{"title":"Default Title","offer_id":53666113061153,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/hqickey.com\/de\/products\/sn74ls640db","provider":"HQICKEY","version":"1.0","type":"link"}