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LogiSwitch LS18-P
- Part No.:
- LS18-P
- Manufacturer:
- LogiSwitch
- Category:
- Specialized ICs
- Package:
- 8-DIP (0.300", 7.62mm)
- Description:
- IC SWITCH DEBOUNCER 8DIP
- Quantity:
Unit Price:$2.47
Ext Price:$2.47
- Payment:
- Shipping:
Product Details
LS18-P - Three-Channel NoBounce Switch Debouncer
LogiSwitch LS18-P is a three-channel mechanical-switch debouncer in an 8-pin, 300 mil through-hole PDIP package. It provides normally high, active-low outputs for normally open switch inputs.
The exact ordering code, LS18-P, and its pin assignments are documented in the LogiSwitch LS10-series technical details. Check the current manufacturer documentation before final circuit qualification.
Overview
LS18-P conditions three independent normally open mechanical-switch signals. Each channel includes an internal pull-up at the switch input and a normally high output that changes to active low after the device rejects contact bounce. The switch common connects to the ground reference. This reduces discrete debounce circuitry in control panels, operator interfaces and embedded equipment.
Key Advantages
One 8-pin IC conditions three switch inputs and provides three corresponding outputs.
Integrated input pull-ups support a normally open switch between an input and the ground reference.
Manufacturer-described NoBounce logic rejects brief noise spikes and contact bounce.
The 300 mil PDIP form factor suits socketed prototypes and through-hole circuit boards.
Feature Summary
Manufacturer pin description specifies VDD from 2.3 V to 5.5 V relative to VSS.
Outputs are normally high and become active low with their associated inputs.
LogiSwitch describes a low-impedance, 25 mA totem-pole output per channel; check load limits in the latest datasheet.
Noise spikes shorter than 20 ms are described as insufficient to start or end a cycle.
Package & Footprint
The LS18-P uses an 8-pin plastic dual-inline package approximately 300 mil (7.62 mm) wide. The customer package registry identifies this outline as 8-DIP.
- Verify 300 mil row spacing and board-hole dimensions against the controlled package drawing.
- Confirm pin 1 orientation before routing the switch inputs and supply.
- Do not reuse the footprint of the 8-SOIC LS18-S variant.
The expected package image is registered but is not yet present locally; the image must be supplied and checked before publication.
Pin Functions
The following pin assignment is from the LogiSwitch LS10-series technical details for LS18-P.
2.3 V to 5.5 V supply.
Normally open switch input 0.
Normally open switch input 1.
Normally open switch input 2.
Normally high output 2.
Normally high output 1.
Normally high output 0.
Ground reference and switch common.
Use the controlled pin-one drawing for assembly orientation; signal names alone do not establish board footprint orientation.
Key Specifications
| Manufacturer | LogiSwitch |
|---|---|
| Exact order code | LS18-P |
| Function | Mechanical-switch debouncer / noise rejection |
| Channels | 3 independent channels |
| Supply at VDD | 2.3 V to 5.5 V per manufacturer pin description |
| Switch interface | Normally open input to VSS with internal pull-up |
| Output polarity | Normally high; active low |
| Output structure | Totem-pole, described as 25 mA per channel by manufacturer |
| Debounce behavior | Approximately 20 ms plus bounce time, activation and release |
| Noise rejection | Spikes shorter than 20 ms do not initiate or terminate a cycle, per manufacturer description |
| Package | 8-DIP / 8-pin plastic PDIP, 300 mil width |
| Mounting | Through hole |
Functional descriptions are not guaranteed electrical test limits. Confirm absolute limits, loading and timing against the current controlled datasheet for the end application.
Replacement Considerations
LS18-S is the same manufacturer's three-channel LS18 function in an 8-SOIC surface-mount package, not a footprint-compatible substitution for LS18-P. Compare the package, board assembly, supply range and output loading before changing order codes. LS100-series handshake variants add different interface behavior and should not be assumed pin- or function-equivalent.
Manufacturer Information
LogiSwitch identifies LS18-P as the PDIP member of its LS10 NoBounce switch-debouncer family. The corresponding LS18-S ordering code is the SOIC version. Use the exact ordering suffix when checking package and procurement records.
Applications
Condition normally open pushbuttons before a digital controller input.
Reduce false transitions in panel-mounted switch interfaces.
Use a socketable PDIP device when evaluating three switch channels.
Provide stable active-low switch indications in low-voltage control circuits.
Quality & Authenticity
Match the LS18-P top marking, manufacturer identity and 8-pin PDIP package to procurement documents. Inspect pin condition and storage history before assembly. Confirm the intended supply and switch wiring during incoming inspection.
FAQ
How many switches can LS18-P debounce?
Three independent normally open switch inputs, SW0 through SW2, are provided.
Is LS18-S a drop-in replacement?
No. LS18-S has the same family function but uses an 8-SOIC surface-mount package rather than the LS18-P through-hole PDIP.
What does the output do when a switch closes?
The associated normally high output goes active low after the device's debounce interval.
Engineering Notice
This detail is a selection aid, not a substitute for the latest LogiSwitch controlled documentation. Validate pin orientation, supply limits, timing, output loading and the complete switch circuit before production. The package JPG is pending and must be verified before this product is published.
LS18-P Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- LogiSwitch
- Series:
- LS10
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Box
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Switch Debouncer
- Applications:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
- Grade:
- -
- Qualification:
- -
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