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LogiSwitch LS20-S
- Part No.:
- LS20-S
- Manufacturer:
- LogiSwitch
- Category:
- Specialized ICs
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Description:
- IC SWITCH DEBOUNCER 20SOIC
- Quantity:
Unit Price:$2.99
Ext Price:$2.99
- Payment:
- Shipping:
Product Details
LS20-S - Nine-Channel NoBounce Switch Debouncer
LogiSwitch LS20-S conditions nine mechanical switch channels in a 20-pin, 300 mil wide SOIC package.
The exact order code is listed in the LogiSwitch LS10 Series IC User's Guide. Confirm the manufacturer's pin drawing before PCB release.
Overview
LS20-S is the nine-channel surface-mount member of LogiSwitch's LS10 NoBounce family. Each switch input has an internal pull-up; a normally open or normally closed contact can connect the input to ground. The device rejects contact bounce and short noise spikes before presenting the corresponding output to a controller.
Key Advantages
Conditions nine mechanical switch signals in one device.
Adaptive NoBounce processing avoids an external RC timing network for the switch inputs.
The guide describes rejection of noise spikes shorter than the clean-time interval.
The wide 20-pin SOIC suits surface-mount assembly.
Feature Summary
2.5 V to 5.5 V in the electrical-specifications table.
Same-polarity, low-impedance totem-pole outputs, rated for 25 mA source or sink current.
Supports normally open and normally closed contacts and active-high or active-low use.
20 ms typical clean time; total debounce is bounce time plus clean time.
Package & Footprint
LS20-S is the 20-pin, 300 mil wide SOIC variant. LCDChip registers this outline as 20-SOIC (0.295 inch, 7.50 mm width). It is not footprint-compatible with the 20-pin PDIP LS20-P.
- Use manufacturer-controlled dimensions for the land pattern.
- Confirm pin-1 orientation before routing supply and switch nets.
- Do not reuse the PDIP footprint.
The registered local 20-SOIC JPG is missing. The reserved image path is not yet a usable illustration.
Pin Functions
The manufacturer guide identifies pin 1 as VDD, pins 2-10 as switch inputs 0-8, pins 11-19 as corresponding output functions in reverse channel order, and pin 20 as VSS. The printed output-name column contains apparent inconsistencies; do not infer corrected labels from this summary.
Positive supply.
Nine contact inputs with internal pull-ups.
Nine normally high output functions; confirm exact printed pin names with LogiSwitch.
Ground and switch common.
Key Specifications
| Manufacturer | LogiSwitch |
|---|---|
| Ordering code | LS20-S |
| Function | Nine-channel switch debounce and noise filter |
| Channels | 9 |
| Package | 20-pin wide SOIC, 300 mil; registered 20-SOIC |
| Mounting | Surface mount |
| Operating voltage | 2.5 V to 5.5 V per electrical-specifications table |
| Operating temperature | -40 to +85 degrees C |
| Supply current | 2.1 mA typical, 2.6 mA maximum at VCC = 3.0 V, all inputs open |
| Input pull-up current | 120 microamps typical per pin; 25 to 200 microamps limits |
| Clean time | 20 ms typical; 17.6 to 22.4 ms over -40 to +85 degrees C at 2.5 V to 5.5 V |
| Debounce time | Bounce time plus clean time |
| Output drive | 25 mA source or sink |
Replacement Considerations
The manufacturer lists LS20-P as the nine-channel 20-pin PDIP variant, but the mounting style and footprint differ. Compare voltage range, contact polarity, timing, output load and package dimensions before any substitution. No unverified catalog alternative is linked here.
Manufacturer Information
LogiSwitch identifies LS20-S as the nine-channel SOIC member of the LS10 series. The November 2023 LS10 Series IC User's Guide provides the package, operating conditions and electrical values summarized above. The guide's output pin-name inconsistency requires clarification for final schematic capture.
Applications
Condition groups of mechanical pushbuttons or toggle switches.
Filter contact bounce before controller inputs.
Reduce spurious transitions from magnetic contacts.
Provide debounced, same-polarity digital switch signals.
Quality & Authenticity
Verify the LS20-S order code, manufacturer marking, 20-pin SOIC body, traceability and pin-1 indicator on receipt. Obtain supplier lot and compliance records when required by the build specification.
FAQ
How many switches can LS20-S condition?
Nine independent switch inputs are listed in the manufacturer guide.
Does it require external debounce RC components?
No external RC timing network is required for its adaptive switch debounce function.
Can LS20-P use the same PCB footprint?
No. LS20-P is a through-hole PDIP; LS20-S is a surface-mount SOIC.
Why is the pin table flagged?
Several output names in the published table do not match their function text; confirm the controlled pin drawing before layout.
Engineering Notice
This summary does not replace the controlled LogiSwitch documentation. Resolve output pin-name inconsistencies, check conditions for all electrical ratings and obtain the 20-SOIC mechanical drawing before design release. The registered local package JPG is unavailable, so this product remains under review and must not be published.
LS20-S Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- LogiSwitch
- Series:
- LS10
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Box
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Switch Debouncer
- Applications:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
- Grade:
- -
- Qualification:
- -
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