SN74ALS191ADR

Counter Dividers Overview

The SN74ALS191ADR is a synchronous 4-bit up/down binary counter from the Texas Instruments 74ALS series. It features positive-edge triggering and operates within a supply voltage range of 4.5 V to 5.5 V. The device supports bidirectional counting with a maximum count rate of 30 MHz. It is housed in a 16-SOIC surface-mount package and functions across an operating temperature range of 0°C to 70°C.

Counter Dividers Feature Summary

• Synchronous 4-bit up/down binary counting capability
• Positive-edge triggered operation for precise timing control
• High-speed performance with a 30 MHz count rate

Counter Dividers Applications

• Digital frequency division circuits
• Position control systems requiring bidirectional tracking
• Timing sequence generation in industrial automation

Counter Dividers Procurement Notes

Verify the specific suffix 'ADR' against the manufacturer's official datasheet to confirm package dimensions and tape-and-reel specifications. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability may vary by region and production lot.

Counter Dividers Selection Notes

Select this component when high-speed synchronous counting is required within standard 5V logic levels. Ensure the design accommodates the 74ALS series power consumption characteristics compared to LS or HC families. Verify that the 16-SOIC footprint matches the PCB layout constraints.

Counter Dividers Part Context

This part belongs to the Texas Instruments 74ALS (Advanced Low-power Schottky) family, designed for applications requiring faster switching speeds than standard LS logic while maintaining lower power dissipation than ALS predecessors. It serves as a digital building block for sequential logic designs.

Counter Dividers Replacement Considerations

SN74ALS191ANSR is a documented equivalent alternative from Texas Instruments.