SN74HC191DR

Counter Dividers Overview

The SN74HC191DR is a synchronous 4-bit up/down binary counter manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and supports counting rates up to 24 MHz. The device features asynchronous reset, positive-edge triggering, and bidirectional count control via dedicated inputs. It is housed in a 16-SOIC surface-mount package and functions reliably across an industrial temperature range from -40°C to +85°C.

Counter Dividers Feature Summary

• Synchronous 4-bit binary counting with independent up/down direction control
• Positive-edge triggered clocking for precise timing synchronization
• Asynchronous master reset input for immediate state initialization

Counter Dividers Applications

• Digital frequency division circuits
• Programmable time-base generators
• Binary sequence generation systems

Counter Dividers Procurement Notes

Verify the suffix 'D' indicates SOIC-16 packaging and 'R' denotes reel tape-and-reel shipping configuration. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure operating conditions remain within specified voltage and temperature limits to maintain signal integrity and functional reliability.

Counter Dividers Selection Notes

Select this component when a synchronous 4-bit counter with bidirectional capability is required. The HC logic family ensures compatibility with standard CMOS interfaces. Verify that the 16-pin SOIC footprint aligns with PCB layout constraints and thermal management requirements for the target application environment.

Counter Dividers Part Context

This part belongs to the Texas Instruments SN74HC191 series of high-speed CMOS logic devices. It serves as a core timing element in digital systems requiring precise binary counting operations. The DR variant specifically designates the surface-mount package style suitable for automated assembly processes.

Counter Dividers Replacement Considerations

SN74HC191NS is a documented alternative offering identical logical functionality in a different package format.