Texas Instruments SN74AHC245PWR Octal Bus Transceiver, TSSOP-20 ?C Snelle Logica

SN74AHC245PWR High-Speed Octal Bus Transceiver Overview

The SN74AHC245PWR from Texas Instruments is a high-performance octal (8-channel) bus transceiver designed for bidirectional data transfer in high-speed digital systems. Its tri-state outputs enable safe isolation of buses, preventing signal conflicts when multiple devices share communication paths??critical for maintaining integrity in fast-moving data environments. This makes it ideal for data centers, telecommunications equipment, and industrial automation, where speed and reliability are paramount. IC-fabrikant offers this advanced logic component as part of its portfolio of high-speed semiconductors, trusted for performance in demanding applications.

Technical Parameters of SN74AHC245PWR

Parameter	Waarde	Eenheid
Aantal kanalen	8	channels
Bereik voedingsspanning	2.0 to 5.5	V
Output Current (Max, per channel)	8	mA (sink/bron)
Propagatievertraging (Typ)	6	ns (at 5V, 50pF load)
Ruststroom (Max)	10	??A
Type verpakking	TSSOP-20 (Thin Shrink Small Outline Package, 20-pin)

Operationele kenmerken

Kenmerk	Specificatie
Bedrijfstemperatuurbereik	-40 °C tot +85 °C
Ingangsspanningsbereik	0 tot VCC
Direction Control	Single pin (DIR) for bidirectional switching
Enable Time (Typ)	7	ns
Disable Time (Typ)	6	ns
ESD-bescherming	2kV (HBM), 250V (MM)
Logische familie	AHC (Advanced High-Speed CMOS)

Advantages Over Alternative Bus Transceivers

The SN74AHC245PWR outperforms conventional solutions in high-speed, multi-channel systems, starting with its integrated octal design. Unlike using eight single-channel transceivers, it reduces component count by 87%, slashing PCB space and assembly costs??critical for dense data center motherboards and telecom switches. This integration 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?C5.5V range supports both legacy 5V systems and modern 3.3V designs, eliminating the need for separate transceivers in mixed-voltage environments. This versatility is valued by industrial manufacturers upgrading older equipment while retaining compatibility with new sensors.

Its 6ns propagation delay (at 5V) enables 167MHz operation, outperforming slower logic families (e.g., 74HC) by 2x in high-bandwidth applications like Ethernet switches. “We achieved 40% faster data throughput in our network routers using this transceiver,” notes a senior engineer at a leading telecommunications firm.

The TSSOP-20 package (6.4mm??10.1mm) offers superior space efficiency compared to larger packages (e.g., SOIC-20), fitting into compact designs where every millimeter matters. Combined with 10??A quiescent current, it balances speed and power efficiency??critical for thermal management in dense data center hardware.

Typical Applications of SN74AHC245PWR

The SN74AHC245PWR excels in high-speed, bidirectional systems requiring reliable multi-channel data transfer. Key use cases include:

• Data centers (server motherboard bus isolation and peripheral interface buffering)
• Telecommunications (Ethernet switches, router backplane data routing)
• Industrial automation (PLCs and high-speed sensor network bidirectional communication)
• Consumer electronics (gaming consoles and high-speed peripheral hubs)
• Test and measurement equipment (signal conditioning for fast data acquisition)

Texas Instruments?? Expertise in High-Speed Logic

As a Texas Instruments product, the SN74AHC245PWR leverages TI??s decades of innovation in high-speed CMOS logic. The AHC series is engineered for optimal balance of speed, voltage flexibility, and reliability??critical for demanding environments like data centers and industrial floors. 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 Cisco and Dell, who rely on AHC components for high-volume production of network and server equipment.

Veelgestelde vragen (FAQ)

What is an octal bus transceiver, and how does it improve system design?

An octal bus transceiver contains eight independent bidirectional circuits in one package, enabling data transfer in both directions (A to B or B to A) via a single direction control pin. This eliminates the need for eight separate transceivers, reducing PCB space by up to 70% in multi-channel systems (e.g., a server motherboard with eight peripheral data paths). It also ensures matched timing across channels, preventing data misalignment in high-speed communication.

Why is the 2.0V?C5.5V 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 transceiver, avoiding costly overhauls while retaining compatibility??saving engineering time and production costs.

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 server motherboards, 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 data center and telecom equipment where consistency and miniaturization are key.

Why is high-speed performance (6ns delay) critical for modern electronics?

6ns propagation delay allows the transceiver to handle signals up to 167MHz, supporting fast interfaces like USB 3.0 or 10G Ethernet. In network switches, this ensures data packets are routed without lag, preventing bottlenecks. Slower transceivers would introduce delays, reducing throughput and increasing latency in time-sensitive applications like real-time data processing.

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 data centers and industrial settings. Without this, static could damage the transceiver, causing intermittent failures (e.g., a server losing communication with a storage array). This protection reduces warranty claims and unplanned downtime, as confirmed by field reliability data from equipment manufacturers.