{"product_id":"texas-instruments-sn7440-nand-buffer-integrated-circuit","title":"Texas Instruments SN7440 NAND Buffer Integrated Circuit","description":"\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:15a55551-664a-4560-bab9-75fa83c8cf1f-13\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:15a55551-664a-4560-bab9-75fa83c8cf1f-13\" data-turn-id-container=\"request-WEB:15a55551-664a-4560-bab9-75fa83c8cf1f-13\" data-testid=\"conversation-turn-26\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-15 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"59ca05e5-db7d-484b-9b7e-f12279194117\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full dark markdown-new-styling\"\u003e\n\u003ch3 data-section-id=\"17lc1ru\" data-start=\"0\" data-end=\"16\"\u003eDescription:\u003c\/h3\u003e\n\u003cp data-start=\"18\" data-end=\"707\"\u003eThe Texas Instruments SN7440 Gold Flat Pack Integrated Circuit is used in TTL digital logic systems to perform dual 4-input positive NAND buffer functions for industrial, military, and electronic computing applications. Commonly installed in vintage computers, industrial control equipment, telecommunications systems, laboratory instruments, aerospace electronics, and early digital logic circuits manufactured during the 1960s and 1970s. Maintenance teams, electronics restoration specialists, and collectors use this integrated circuit for equipment repair, PCB restoration, legacy system maintenance, and replacement of obsolete TTL logic devices. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5ms9th\" data-start=\"709\" data-end=\"726\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"728\" data-end=\"1187\"\u003eThe Texas Instruments SN7440 is designed for digital logic processing using two independent 4-input positive NAND buffer gates. It is widely used in vintage computing systems, industrial automation controllers, military electronic equipment, telecommunications hardware, digital test equipment, educational laboratories, and OEM electronic assemblies requiring standard TTL logic functions and reliable signal processing. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5hg6bl\" data-start=\"1189\" data-end=\"1218\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1220\" data-end=\"2066\"\u003e• Brand: Texas Instruments (TI)\u003cbr data-start=\"1251\" data-end=\"1254\"\u003e• Part Number: SN7440\u003cbr data-start=\"1275\" data-end=\"1278\"\u003e• Product Type: Dual 4-Input Positive NAND Buffer Integrated Circuit (IC)\u003cbr data-start=\"1351\" data-end=\"1354\"\u003e• Logic Family: TTL (Transistor-Transistor Logic)\u003cbr data-start=\"1403\" data-end=\"1406\"\u003e• Logic Function: Dual 4-Input Positive NAND Buffers\u003cbr data-start=\"1458\" data-end=\"1461\"\u003e• Number of Gates: 2\u003cbr data-start=\"1481\" data-end=\"1484\"\u003e• Inputs per Gate: 4\u003cbr data-start=\"1504\" data-end=\"1507\"\u003e• Output Type: TTL Logic Output\u003cbr data-start=\"1538\" data-end=\"1541\"\u003e• Operating Voltage: 5 VDC Nominal\u003cbr data-start=\"1575\" data-end=\"1578\"\u003e• Operating Temperature: 0°C to +70°C\u003cbr data-start=\"1615\" data-end=\"1618\"\u003e• Package Style: Gold Ceramic Flat Pack (Vintage Military-Style Package)\u003cbr data-start=\"1690\" data-end=\"1693\"\u003e• Mounting Type: Through-Hole \/ Flat Pack PCB Mount\u003cbr data-start=\"1744\" data-end=\"1747\"\u003e• Technology: Bipolar TTL\u003cbr data-start=\"1772\" data-end=\"1775\"\u003e• Application: Digital Logic Processing and Signal Buffering\u003cbr data-start=\"1835\" data-end=\"1838\"\u003e• Typical Industries: Industrial Electronics, Aerospace, Telecommunications, Computing, Instrumentation, and Electronic Test Equipment\u003cbr data-start=\"1972\" data-end=\"1975\"\u003e• Lifecycle Status: Obsolete \/ Discontinued Component \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"1cz0398\" data-start=\"2068\" data-end=\"2092\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"2094\" data-end=\"2219\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e• Texas Instruments SN74LS40\u003cbr data-start=\"2122\" data-end=\"2125\"\u003e• Texas Instruments SN74S40\u003cbr data-start=\"2152\" data-end=\"2155\"\u003e• Texas Instruments SN5440\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TI","offers":[{"title":"New","offer_id":51714024374574,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_73aa6980-28b1-449c-97cd-e2e52a093cda.jpg?v=1770414123","url":"https:\/\/plgautomation.com\/products\/texas-instruments-sn7440-nand-buffer-integrated-circuit","provider":"PLG Automation ","version":"1.0","type":"link"}