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SP721APP
Public Made by Adomby adom
Littelfuse Electrostatic And Surge Protection (TVS/ESD), PDIP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownSP721APP
Littelfuse · Electrostatic And Surge Protection (TVS/ESD) · PDIP-8
SP721APP from Littelfuse, in a PDIP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | IN | input | Signal input protected by SCR/diode structures that clamp to V+ when the input exceeds one VBE above V+ and to V- when it falls one VBE below V-. |
| 2 | IN | input | Signal input protected by SCR/diode structures that clamp to V+ when the input exceeds one VBE above V+ and to V- when it falls one VBE below V-. |
| 3 | IN | input | Signal input protected by SCR/diode structures that clamp to V+ when the input exceeds one VBE above V+ and to V- when it falls one VBE below V-. |
| 4 | V- | power_in | Negative supply pin that sets the lower SCR trigger threshold, one VBE diode drop below V-; operating supply range (V+)-(V-) is 2 to 30 V. |
| 5 | IN | input | Signal input protected by SCR/diode structures that clamp to V+ when the input exceeds one VBE above V+ and to V- when it falls one VBE below V-. |
| 6 | IN | input | Signal input protected by SCR/diode structures that clamp to V+ when the input exceeds one VBE above V+ and to V- when it falls one VBE below V-. |
| 7 | IN | input | Signal input protected by SCR/diode structures that clamp to V+ when the input exceeds one VBE above V+ and to V- when it falls one VBE below V-. |
| 8 | V+ | power_in | Positive supply pin that sets the upper SCR trigger threshold, one VBE diode drop above V+; absolute maximum continuous supply (V+)-(V-) is +35 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse |
| Package | PDIP-8 |
| Category | Circuit Protection |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Operating Voltage Range | VSUPPLY | 2 | 30 | V | VSUPPLY = [(V+) - (V-)] | 2 | |
| Input Leakage Current | IIN | -20 | 5 | 20 | nA | 2 | |
| Quiescent Supply Current | IQUIESCENT | 50 | 200 | nA | 2 | ||
| Continuous Supply Voltage, (V+) - (V-) | 35 | V | 2 | ||||
| Forward Peak Current, IIN to VCC, IIN to GND | -2 | 2 | A | 100µs; IIN to VCC, IIN to GND (Refer to Figure 5) | 2 | ||
| Maximum Storage Temperature Range | -65 | 150 | °C | 2 | |||
| Maximum Junction Temperature (Plastic Package) | 150 | °C | 2 | ||||
| Operating Temperature Range | -40 | 105 | °C | Temp. Range column, ordering table for SP721APP | 6 | ||
| Thermal Resistance, junction to ambient (PDIP package) | θJA | 160 | °C/W | PDIP package; typical, Note 1 (measured on evaluation PC board in free air) | 2 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | Copper Alloy | tin | Lead Plating Matte Tin Lead Material Copper Alloy | 6 |
CAD (KiCad official)
- Symbol:
SP721APP - Footprint:
Package_DIP:DIP-8_W7.62mm - 3D model: PDIP-8 (KiCad packages3D, STEP)
- 3D model files:
sp721app-etched.step/sp721app-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sp721app.step/sp721app.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (6 pp, sha256
eb5e983ff1c51866, retrieved 2026-10-29, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).