LS119-S

Specialized ICS Overview

The LogiSwitch LS119-S is a six-channel switch debouncer IC in a 14-pin narrow SOIC package. It utilizes adaptive NoBounce technology to eliminate contact bounce without external components. The device operates on a +2.3 V to +5.5 V supply and features an integrated handshake protocol via NL/HS pins for efficient interrupt handling. Electrical characteristics include a typical supply current of 2.6 mA at 3.0 V, internal debounce time of 21 ms, and input-to-output response times between 4 µs and 20 µs.

Specialized ICS Feature Summary

• Adaptive NoBounce technology eliminates switch bounce without external passive components or timing calculations.
• Six-channel configuration with immediate output change upon actuation and release.
• Integrated request/acknowledge handshake protocol (NL/HS) allows program-controlled cycle termination.
• Operates within a voltage range of +2.3 V to +5.5 V and temperature range of -40°C to +85°C.

Specialized ICS Applications

• Embedded systems requiring low-latency mechanical switch interfacing.
• Microcontroller applications utilizing interrupt-driven switch service routines.
• Industrial control panels needing reliable debounce without polling overhead.

Specialized ICS Procurement Notes

Verify the specific suffix 'S' confirms the 14-pin narrow SOIC package variant. Confirm that the ordering information matches the LS119 part number for six channels. Ensure the application environment stays within the specified operating voltage and temperature limits defined in the datasheet.

Specialized ICS Selection Notes

Select the LS119-S when six independent switch inputs require debouncing. Choose this model over the LS118 (3-channel) or LS120 (9-channel) based on channel count requirements. The SOIC package is suitable for surface mount designs where space efficiency is prioritized alongside the handshake functionality.

Specialized ICS Part Context

The LS119-S belongs to the LS100 Series of Ultra-Fast Response Debounce ICs from LogiSwitch. This series includes the LS118 (3-channel) and LS120 (9-channel) variants, all sharing the same adaptive NoBounce logic and handshake capabilities but differing in channel count and package size.

Specialized ICS Replacement Considerations

No direct public substitutes are listed. Alternative solutions typically require external RC networks or firmware-based polling, which differ significantly from the hardware-level adaptive debounce and handshake features of the LS100 series.

Specialized ICS FAQ

How does the handshake protocol function?

The host microcontroller sends a 5 µs low-level pulse to the NL/HS pin to acknowledge the switch event. This latches the line low, terminating the cycle immediately without waiting for switch release.

What is the maximum debounce time?

The internal debounce time is fixed at 21 ms. The total clean time (tdb + tcl) ensures valid switch release detection after approximately 20 ms plus any bounce duration.

Can the LS119-S operate without the handshake feature?

Yes. If the handshake is not utilized, the NL/HS pins function as ordinary active-high outputs that mirror the switch input with bounce removed.