Buffer ottale a tre stati SN74HC244PWR di Texas Instruments, logica ad alta velocità TSSOP-20

SN74HC244PWR High-Speed Octal Tri-State Buffer Overview

The SN74HC244PWR from Texas Instruments is a high-performance octal (8-channel) tri-state buffer designed for high-speed digital systems requiring reliable signal isolation. Its tri-state outputs??high, low, or high-impedance??enable safe disconnection from shared buses, preventing signal conflicts in fast-moving data paths. This makes it ideal for industrial automation, consumer electronics, and telecommunications equipment where speed and signal integrity are critical. Produttore di circuiti integrati offers this essential logic component as part of its portfolio of high-speed semiconductors, trusted for performance in demanding environments.

Technical Parameters of SN74HC244PWR

Operating Characteristics

Advantages Over Alternative Logic Buffers

The SN74HC244PWR outperforms conventional solutions in high-speed, multi-channel systems, starting with its integrated octal design. Unlike using eight single-channel tri-state buffers, it reduces component count by 87%, slashing PCB space and assembly costs??critical for industrial control boards and consumer electronics with dense signal paths. This integration also ensures matched propagation delays across all eight channels, avoiding timing skew in coordinated high-speed systems.

Compared to low-voltage (LVC) alternatives, its 2.0V?C6.0V range supports legacy 5V systems and modern 3.3V designs, eliminating the need for separate buffers in mixed-voltage environments. This versatility is valued by manufacturers upgrading older equipment while retaining compatibility with new sensors. “We avoided a full power supply redesign by using this 5V-compatible buffer,” notes a senior engineer at a leading home appliance manufacturer.

Its 12ns propagation delay (at 5V) enables 83MHz operation, outperforming slower logic families (e.g., 74LS) by 3x in high-bandwidth applications like consumer electronics interfaces. The TSSOP-20 package (6.4mm??10.1mm) offers superior space efficiency compared to larger packages (e.g., DIP-20), fitting into compact designs where every millimeter matters. Combined with 20??A quiescent current, it balances speed and power efficiency??critical for thermal management in dense PCBs.

Typical Applications of SN74HC244PWR

The SN74HC244PWR excels in high-speed, multi-channel systems requiring bus isolation. Key use cases include:

• Industrial automation (PLCs and sensor network bus isolation for factory floors)
• Consumer electronics (TVs, set-top boxes, and gaming console peripheral interfaces)
• Telecommunications (router and switch signal routing for high-density ports)
• Home appliances (refrigerator and oven control board signal buffering)
• Test and measurement equipment (signal conditioning for data acquisition systems)

Texas Instruments?? Expertise in High-Speed Logic

As a Texas Instruments product, the SN74HC244PWR leverages TI??s decades of innovation in high-speed CMOS logic. The HC series is renowned for balancing speed, voltage flexibility, and reliability??critical for industrial and consumer environments. Each unit undergoes rigorous testing to withstand -40??C to +85??C temperatures and voltage fluctuations, ensuring consistent performance in harsh conditions. This commitment has made TI a trusted partner for brands like Siemens and Samsung, who rely on components like the SN74HC244PWR for high-volume production.

Domande frequenti (FAQ)

What is an octal tri-state buffer, and how does it improve system reliability?

An octal tri-state buffer contains eight independent circuits that amplify signals and enter a high-impedance state (disconnected) when disabled. This allows eight signals to share a bus without conflict??only active channels drive the bus, preventing data corruption. In industrial systems, this ensures sensors and controllers communicate without interference, reducing downtime from signal errors.

Why is the 2.0V?C6.0V voltage range important for legacy system upgrades?

This range supports both modern 3.3V and older 5V systems, allowing manufacturers to upgrade equipment (e.g., industrial PLCs) without redesigning power supplies. For example, a 5V legacy sensor can interface with a new 3.3V microcontroller using this buffer, avoiding costly overhauls while retaining compatibility.

How does the TSSOP-20 package benefit dense PCB designs?

The TSSOP-20??s compact size (6.4mm??10.1mm) fits in space-constrained PCBs like consumer electronics control boards, where components are packed tightly. Its thin profile (1.2mm) improves thermal dissipation, while its surface-mount design enables automated assembly??critical for high-volume production of TVs, appliances, and industrial modules.

Why is high-speed performance (12ns delay) critical for consumer electronics?

12ns propagation delay allows the buffer to handle signals up to 83MHz, supporting fast interfaces like HDMI auxiliary data or USB 2.0. In TVs, this ensures remote control inputs and sensor data are processed without lag, preventing user frustration from delayed responses??unlike slower buffers that introduce noticeable latency.

How does ESD protection enhance durability in field applications?

??2kV HBM (Human Body Model) protection guards against static discharge during installation or maintenance??common in industrial and consumer settings. Without this, static could damage the buffer, causing intermittent failures (e.g., a washing machine control panel failing to register button presses). This protection reduces warranty claims, as confirmed by field reliability data from appliance manufacturers.