LS119-P

Specialized ICS Overview

The LogiSwitch LS119-P is a six-channel switch debouncer IC from the LS100 series, housed in a 14-pin PDIP package. It operates on a supply voltage of 2.5 V to 5.5 V with a typical supply current of 2.6 mA at 3.0 V. The device utilizes adaptive NoBounce technology to eliminate mechanical switch bounce without external components. Key electrical parameters include an input-to-output propagation delay of 4 µs (typical) and a clean time of 20 ms. It features integrated handshake protocol support via NL/HS pins for efficient interrupt handling.

Specialized ICS Feature Summary

• Adaptive NoBounce technology eliminates switch bounce without external passive components or timing calculations.
• Six independent channels with immediate output change upon actuation and release.
• Integrated request/acknowledge handshake protocol on NL/HS pins to transfer service control to the host program.
• Operates within a wide supply voltage range of 2.5 V to 5.5 V.

Specialized ICS Applications

• High-speed digital electronics requiring bounce-free switch inputs.
• Microcontroller-based systems utilizing interrupt-driven switch service routines.
• Portable equipment where power efficiency and reduced polling overhead are critical.

Specialized ICS Procurement Notes

Verify the specific suffix 'P' confirms the Plastic DIP (PDIP) package variant. Confirm the operating temperature range requirements align with the specified -40°C to +85°C industrial grade. Ensure the host interface supports the 5 µs acknowledgement pulse required for the handshake protocol functionality.

Specialized ICS Selection Notes

Select the LS119-P when exactly six debounced channels are required. Compare against the LS118-P for three-channel needs or the LS120-P for nine-channel applications. Consider the SOIC variants (LS119-S) if surface-mount assembly is preferred over through-hole mounting.

Specialized ICS Part Context

The LS119-P belongs to the LS100 Series of Ultra-Fast Response Debounce ICs. This series includes the LS118 (3-channel) and LS120 (9-channel) models. All devices share the same adaptive debounce logic and handshake protocol architecture, differing primarily in channel count and package pinout.

Specialized ICS Replacement Considerations

No direct cross-manufacturer replacement is documented in the provided source material. For equivalent functionality, evaluate other dedicated switch debouncer ICs that support handshake protocols or adaptive filtering without external components.

Specialized ICS FAQ

How does the handshake protocol improve system performance?

The handshake protocol allows the host processor to acknowledge a switch event immediately via a 5 µs low pulse, terminating the cycle without waiting for the switch to be released. This eliminates polling delays and prevents extraneous interrupts.

What is the maximum debounce time for the LS119-P?

The internal debounce time is approximately 21 ms. The total cycle includes a clean time of 20 ms plus the variable bounce time, which can last up to 1 ms.

Can the NL/HS pins function as standard outputs?

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