LS118-P

Specialized ICS Overview

The LogiSwitch LS118-P is a three-channel switch debouncer IC from the LS100 series, housed in an 8-pin PDIP package. It utilizes adaptive NoBounce technology to eliminate switch bounce without external components. The device operates on a supply voltage of 2.5 V to 5.5 V and features an internal debounce time of 21 ms with a clean time of 20 ms. It provides immediate output changes upon actuation or release. Each channel includes a Normally Low/Handshake (NL/HS) pin that supports a request/acknowledge protocol for efficient switch service control.

Specialized ICS Feature Summary

• Adaptive NoBounce technology eliminates switch bounce without external passive components
• Three-channel configuration with immediate output response to switch input
• Integrated handshake protocol via NL/HS pins for efficient host communication
• Operates within a 2.5 V to 5.5 V supply range

Specialized ICS Applications

• High-speed digital electronics requiring bounce-free inputs
• Microcontroller systems utilizing interrupt-driven switch handling
• Embedded designs needing poll-free switch monitoring

Specialized ICS Procurement Notes

Verify the specific ordering suffix '-P' confirms the Plastic DIP package variant. Confirm the manufacturer is LogiSwitch LLC. Ensure the component matches the LS100 series specifications regarding the handshake protocol and adaptive debounce logic.

Specialized ICS Selection Notes

Select the LS118-P when three independent switch channels are required. Choose this part over the LS118-S if through-hole mounting is preferred. Consider the LS119 or LS120 if six or nine channels are needed respectively. Ensure the application benefits from the handshake protocol to reduce processor overhead.

Specialized ICS Part Context

The LS118-P belongs to the LS100 series of Ultra-Fast Response Debounce ICs. This series is characterized by its adaptive debounce logic and exclusive handshake protocol. The 'P' suffix denotes the 300 mil Plastic DIP package, distinguishing it from the narrow SOIC 'S' variant.

Specialized ICS Replacement Considerations

No direct public substitutes are documented. Alternative solutions typically require external RC networks or software-based polling, which differ significantly from the LS118-P's integrated hardware approach.

Specialized ICS FAQ

How does the handshake protocol function?

The NL/HS pin acts as a bidirectional I/O. When a switch activates, the pin goes high. The host can send a 5 µs low ACK pulse to acknowledge receipt, allowing the device to latch the line low and terminate the cycle immediately without waiting for switch release.

What is the internal debounce time?

The internal debounce time is 21 ms across the operating voltage range of 2.5 V to 5.5 V.

Does the LS118-P require external components for debouncing?

No, the LS118-P uses adaptive NoBounce technology and requires no external passive components, calculations, or user-provided timing components.