Overview of 74HCT191D from NXP

The 74HCT191D is a high-speed Si-gate CMOS device and is pin compatible with Low-power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard no. 7A. This integrated circuit is a versatile and robust synchronous up/down binary counter, designed by NXP Semiconductors, which is renowned for its high-quality electronic components.

Key Features

• Counting Capability: The 74HCT191D is capable of performing both up and down counting, providing designers with a flexible solution for various applications that require reversible counting.
• Dual Mode: It operates in either binary or decade mode, allowing for versatile counting configurations.
• Multiple Counting Options: It includes two count enable inputs (nCEP and nCET) and a ripple carry output (RCO) for cascading multiple counters.
• Direct Reset: The device features a direct clear input (nCD), which can be used to reset the counter to its zero state.
• Output Capability: The 74HCT191D provides standard outputs (Q0 to Q3) with the capability to drive 10 LSTTL loads.
• Power Supply: It operates on a power supply range of 4.5V to 5.5V, making it compatible with TTL power environments.
• Speed Performance: It offers a typical clock frequency of 29 MHz, ensuring swift counting operations for high-speed applications.

Applications

The 74HCT191D is suitable for a wide range of applications, including:

• Automated industrial systems
• Consumer electronics
• Instrumentation and measurement systems
• Process control systems
• Automotive electronics

Package Details

This device is offered in a 16-pin SO package, which is a small-outline package that is ideal for space-constrained applications. Its surface-mount design allows for efficient assembly and integration into various electronic systems.

Quality and Reliability

NXP's commitment to quality ensures that the 74HCT191D meets the stringent requirements for reliability and performance. It is designed to operate over a wide range of temperatures, making it suitable for industrial and automotive applications where operating conditions can be harsh.

In summary, the 74HCT191D from NXP is a versatile, high-performance up/down binary counter that is well-suited for a variety of applications requiring reliable and precise counting capabilities.