The SN74HC191NS from Texas Instruments is a high-performance, 4-bit synchronous up/down counter integrated circuit designed with the latest silicon-gate CMOS technology. This versatile counter features individual count-up and count-down clocks and is capable of operating in either binary or BCD (binary-coded decimal) mode.

Key Features

• Logic Family: HC
• Counter Type: 4-Bit Up/Down
• Operation Modes: Binary or BCD counting
• Supply Voltage Range: 2V to 6V
• Output Current: High/Low
• Count Frequency: 25MHz
• Operating Temperature: -40°C to 85°C
• Package / Case: 16-SO

Product Description

The SN74HC191NS is designed for general-purpose counting applications and offers a direct clear function, which resets the counter to its zero state. The device's synchronous operation is provided by having all flip-flops clocked simultaneously on the positive-going edge of the clock. This ensures glitch-free counting and enhances the device's performance in high-speed applications.

With a broad supply voltage range from 2V to 6V, the SN74HC191NS is compatible with a variety of logic levels, making it suitable for interfacing with both TTL and CMOS technologies. The counter can be cascaded in both the up and down modes for larger counting ranges, providing flexibility for complex applications.

Its high count frequency of up to 25MHz allows for use in high-speed systems, and the device's robust operating temperature range ensures reliability across diverse environmental conditions. The 16-SO package ensures a compact footprint, making it ideal for space-constrained applications.

Whether used in digital systems for frequency division, counters, registers, or for other applications requiring a high-performance up/down counter, the SN74HC191NS from Texas Instruments is an excellent choice for designers seeking quality and dependability.