Overview
The 74ACT253MTC is a dual 4-input multiplexer integrated circuit (IC) from the 74ACT series, known for its high-speed performance and reliability in digital logic applications. Manufactured using advanced CMOS technology, it combines low power consumption with robust noise immunity, making it suitable for demanding environments. The device features two independent 4-input multiplexers with shared select lines (S0, S1) and individual enable pins (E), allowing flexible data routing. As part of the 74ACT family, it operates across a broad voltage range (4.5V to 5.5V) and delivers propagation delays as low as 5 ns, ensuring seamless integration into high-frequency systems. Its TSSOP-16 package offers a compact footprint, ideal for space-constrained PCB designs in industrial control systems, automotive electronics, and communication infrastructure.
Structure and Working Principle
The 74ACT253MTC comprises two identical 4-input multiplexers, each with four data inputs (I0-I3), a pair of common select inputs (S0, S1), and an active-low enable pin (E). The select lines determine which input channel is routed to the output (Y). When the enable pin is high, the output enters a high-impedance state, enabling bus-sharing applications. Internally, the IC uses CMOS transistors to minimize power dissipation while maintaining high switching speeds. The ACT series ensures TTL compatibility, accepting standard TTL input levels while providing full CMOS output swings. This design allows seamless interfacing with both legacy TTL and modern CMOS components, making it versatile for mixed-logic systems.
Key Features
High-speed operation with a typical propagation delay of 5 ns ensures real-time data processing, critical for time-sensitive applications like telecommunication switches and automotive control units. The wide operating voltage range (4.5V to 5.5V) accommodates fluctuations in power supply, enhancing reliability in industrial settings. Low power consumption (ICC ≤ 8 μA at 5.5V) reduces heat generation, extending device lifespan. The 74ACT253MTC also exhibits high noise immunity (≥ 1V under industrial noise conditions), minimizing errors in electrically noisy environments. Its TSSOP-16 package (5mm × 4.4mm) is RoHS-compliant, meeting global environmental standards for lead-free manufacturing.
Application Areas
The 74ACT253MTC is widely used in data routing tasks, such as selecting between multiple sensor inputs in automotive ECUs or switching audio/video signals in multimedia systems. Its high-speed capability makes it ideal for bus interfacing in microprocessors and FPGAs, where rapid data multiplexing is required. In telecommunications, it facilitates signal path selection in routers and switches. Industrial applications include programmable logic controllers (PLCs) and automation systems, where reliable signal switching under harsh conditions is essential. The IC’s low-power design also suits battery-operated devices like portable medical equipment and IoT edge nodes.
Maintenance and Precautions
To ensure longevity, avoid exposing the 74ACT253MTC to electrostatic discharge (ESD) during handling; use grounded wrist straps and anti-static mats. Exceeding the maximum supply voltage (7V) may cause permanent damage due to latch-up, a common CMOS failure mode. For optimal performance, decoupling capacitors (0.1 μF) should be placed near the power pins to suppress voltage spikes. Thermal management is generally unnecessary due to low power dissipation, but adequate ventilation is recommended in high-density PCB layouts. Storage conditions should adhere to industry standards (-65°C to +150°C for non-operational environments).
B2B Procurement Guide
When sourcing the 74ACT253MTC, verify authenticity by purchasing from authorized distributors like Texas Instruments, Nexperia, or franchised resellers to avoid counterfeit components. Minimum order quantities (MOQs) typically start at 1,000 units for bulk pricing; sample kits are available for prototyping. Key procurement considerations include lead time (commonly 6–8 weeks for large orders), packaging (tape-and-reel for automated assembly), and compliance certifications (RoHS, REACH). Compare datasheet revisions to ensure compatibility with existing designs. For cost-sensitive projects, consider alternative part numbers like 74HC253 (slower but cheaper) or 74F253 (faster but higher power).
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