The NXP 74F657 is a high-performance, octal bidirectional transceiver designed for asynchronous two-way communication between data buses. It integrates a parity generator/checker to ensure data integrity during data transfer. This IC is particularly suitable for implementing bus-oriented communication protocols in computing and digital systems where error detection is crucial.

Key Features

• Octal Bidirectional Data Path: The 74F657 features eight bidirectional data lines that allow for simultaneous transmission and reception of data, facilitating efficient data exchange between buses.
• Parity Generator/Checker: It comes with an onboard parity generator and checker that adds or checks a parity bit for each byte of data, helping to detect errors during data transfer.
• Bus-Hold Data Inputs: The bus-hold feature on the data inputs eliminates the need for external pull-up or pull-down resistors, simplifying design and saving board space.
• Multiple Modes of Operation: The 74F657 supports both transparent and non-transparent modes, providing flexibility in how data is handled and transferred.
• Edge-Triggered D-Type Flip-Flops: Incorporating edge-triggered D-type flip-flops with totem-pole outputs ensures reliable operation and fast switching capabilities.

Applications

The NXP 74F657 is ideal for a variety of applications that require reliable data transfer with error detection capabilities. It is commonly used in:

• Data communication systems
• Microprocessor or microcontroller-based systems
• Data storage and retrieval systems
• Networking equipment
• Industrial control systems

Technical Specifications

The device operates from a standard 5V supply and is characterized for operation from 0°C to 70°C. It is offered in a 24-pin plastic slim DIP (SOT137-1), a 24-pin plastic SOL (SOT137-4), or a 24-pin plastic SSOP (SOT340-1).

Quality and Reliability

NXP Semiconductors is committed to delivering high-quality products. The 74F657 is produced under stringent quality control measures to ensure consistent performance and reliability for critical applications that demand precision and durability.