{"product_id":"40104-4-bit-bidirectional-shift-register-ic-3-state-logic-for-automotive-ecu-signal-routing","title":"40104 4-Bit Bidirectional Shift Register IC – 3-State Logic for Automotive ECU Signal Routing","description":"\u003cp\u003eThe 40104 series is a high-performance 4-bit bidirectional universal shift register integrated circuit, designed for data manipulation and signal routing within automotive electronic systems. This logic IC is a vital component found in various Engine Control Units (ECUs) and body control modules, where it manages the flow of digital signals across the vehicle's network.\u003c\/p\u003e\n\u003cp\u003eCore Logic Function \u0026amp; Application:\u003cbr\u003eThis device is configured as a 4-bit parallel-in\/parallel-out shift register with a bidirectional counting capability. It allows for versatile data movement, performing both shift-left and shift-right operations synchronously on the positive clock edge. This capability is essential for tasks such as data buffering, serial-to-parallel conversion, and implementing delay lines in automotive control algorithms. In ECU board-level repairs, this IC is a known replacement part for failed logic stages that manage critical communication between the microcontroller and peripheral drivers.\u003c\/p\u003e\n\u003cp\u003eTechnical Specifications \u0026amp; Signal Integrity:\u003cbr\u003eThe 40104 operates across a broad supply voltage range, typically from 3V to 18V, making it compatible with 5V and 12V automotive logic systems. It features a standard 50pF load capacitance and is built on CMOS technology for low power consumption. The device is characterized by a robust propagation delay, with variants capable of operating up to 67 MHz, ensuring reliable performance in time-sensitive automotive circuits.\u003c\/p\u003e\n\u003cp\u003eOutput \u0026amp; Interface Features:\u003cbr\u003eA key feature of this IC is its 3-state output capability, which allows the outputs to be effectively disconnected from the circuit. This high-impedance state is critical for bus-organized systems, preventing data collisions and enabling multiple devices to share the same data lines. The true output polarity ensures accurate signal representation, while the positive-edge trigger provides predictable and stable logic transitions.\u003c\/p\u003e\n\u003cp\u003eEnvironmental Durability \u0026amp; Repair Value:\u003cbr\u003eBuilt to withstand demanding conditions, this IC maintains stable operation across an automotive temperature range of -40°C to +125°C. For ECU repair technicians, the 40104 offers a direct, drop-in replacement for damaged logic components, restoring full signal routing functionality to the engine control unit without the need for expensive module replacement.\u003c\/p\u003e","brand":"Qlnova","offers":[{"title":"Default Title","offer_id":45422269202541,"sku":null,"price":5.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5950\/8845\/files\/40104-1.webp?v=1783048611","url":"https:\/\/qlnova.com\/products\/40104-4-bit-bidirectional-shift-register-ic-3-state-logic-for-automotive-ecu-signal-routing","provider":"Qlnova","version":"1.0","type":"link"}