The 74HCT245D from NXP is an octal bidirectional bus transceiver with 3-state outputs, direction control, and HCT TTL-compatible inputs in SOIC-20 for bus driving and isolation.<\/p>\n
| Paquete<\/td>\n | SOIC-20 (12.8×7.5mm)<\/td>\n<\/tr>\n<\/table>\nCaracter\u00edsticas<\/h2>\nAplicaciones<\/h2>\nProduct Overview The 74HCT245D from NXP is an octal bidirectional bus transceiver with 3-state outputs, direction control, and HCT TTL-compatible inputs in SOIC-20 for bus driving and isolation. Key Specifications Package SOIC-20 (12.8×7.5mm) Features See datasheet for complete specifications Industry-standard package Applications Industrial control Consumer electronics Communication equipment Power management<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13],"tags":[],"chip_brand":[168],"class_list":["post-5734","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","chip_brand-nxp"],"acf":{"brief_explanation":"Octal bus transceiver, 3-state, HCT, SOIC-20","date_code":"","package_case":"SOIC-20 (12.8x7.5mm)","in_stock":10436,"datasheet":"https:\/\/www.nxp.com\/products\/logic\/bus-drivers\/","price":"$0.35 @ 1ku","product_introduction":"The 74HCT245D from NXP is an octal bidirectional bus transceiver with 3-state outputs, direction control, and HCT TTL-compatible inputs in SOIC-20 for bus driving and isolation.","working_principle":"The 74HCT245D is an octal bus transceiver with 3-state outputs from Nexperia\/NXP in SOIC-20, part of the 74HCT family. It provides bidirectional communication between two 8-bit buses (A1-A8 and B1-B8) controlled by two pins: DIR and OE. When DIR is HIGH, data flows from A to B (A pins are inputs, B pins are outputs). When DIR is LOW, data flows from B to A (B pins are inputs, A pins are outputs). When OE is HIGH, both buses are in the high-impedance state regardless of DIR. This allows multiple 74HCT245 devices to share a common bus, with only one driving at a time. The device is the workhorse of microprocessor bus systems: it isolates the CPU data bus from peripheral devices, buffers address\/data lines, and provides level translation between 5V TTL and CMOS systems. The HCT variant has TTL-compatible input thresholds (VIH=2.0V, VIL=0.8V at 4.5V), allowing it to receive signals from both TTL and CMOS sources. The maximum propagation delay is 11ns at 5V, and the output can source\/sink 6mA. The device is commonly used in: (1) Microprocessor bus buffering and isolation; (2) Level translation between 5V and 3.3V systems (HCT can receive 3.3V logic as valid HIGH); (3) Bidirectional I\/O port expansion; (4) Hot-swap isolation (OE=HIGH disconnects the bus during card insertion). The -D suffix specifies SOIC-20.","pin_description":"
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