The SN74HC191N is a versatile 4-bit synchronous up/down counter designed and manufactured by Texas Instruments. This integrated circuit (IC) is part of the 74HC family and is fabricated with high-speed CMOS technology to deliver robust performance in a wide range of applications.

Key Features

• Counting Modes: The device supports both up and down counting modes, providing flexibility for various counting applications.
• Synchronous Operation: The counter advances on the low-to-high transition of the clock input while the count-enable input is low. The synchronous design ensures accurate counting without the delays associated with ripple counters.
• Parallel Load Capability: The SN74HC191N allows users to set the counter to any desired value quickly via the parallel load feature.
• Output Control: The device includes an output control that can disable the outputs to a high-impedance state, allowing for easy interfacing with bus-oriented systems.
• Wide Operating Voltage Range: It operates over a wide voltage range of 2V to 6V, making it suitable for interfacing with both TTL and CMOS logic levels.
• Expandability: Multiple counters can be easily cascaded by connecting the ripple-carry output to the enable count of the subsequent counter.

Applications

The SN74HC191N is ideal for use in a variety of applications, including:

• Industrial control systems
• Instrumentation and test equipment
• Programmable counters and dividers
• Frequency counters
• Time-delay circuits

Technical Specifications

With a 16-pin DIP (Dual In-line Package), the SN74HC191N is easy to integrate into a variety of circuit boards. The IC ensures reliable performance with a typical operating temperature range from -40°C to 85°C.

Ordering Information

To order the SN74HC191N or to obtain more information, visit the Texas Instruments website or contact an authorized distributor. Ensure to refer to the latest datasheets for detailed specifications and application guidelines.