# SP720ABTG

**Littelfuse** · ESD And Surge Protection (TVS/ESD) · SOIC-16

SP720ABTG from Littelfuse, in a SOIC-16. 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 | Protected signal input that is clamped to V+ when it rises more than one VBE above V+, with a single-ended range to +30V and a differential range to ±15V. |
| 2 | IN | input | Protected signal input that is clamped to V+ when it rises more than one VBE above V+, with a single-ended range to +30V and a differential range to ±15V. |
| 3 | IN | input | Protected signal input that is clamped to V+ when it rises more than one VBE above V+, with a single-ended range to +30V and a differential range to ±15V. |
| 4 | IN | input | Protected signal input that is clamped to V+ when it rises more than one VBE above V+, with a single-ended range to +30V and a differential range to ±15V. |
| 5 | IN | input | Protected signal input that is clamped to V+ when it rises more than one VBE above V+, with a single-ended range to +30V and a differential range to ±15V. |
| 6 | IN | input | Protected signal input that is clamped to V+ when it rises more than one VBE above V+, with a single-ended range to +30V and a differential range to ±15V. |
| 7 | IN | input | Protected signal input that is clamped to V+ when it rises more than one VBE above V+, with a single-ended range to +30V and a differential range to ±15V. |
| 8 | V- | power_in | Negative supply pin; an input is clamped to V- when it falls one VBE diode threshold below V-, and the supply (V+) - (V-) operating range is 2V to 30V. |
| 9 | IN | input | Protected signal input that is clamped to V+ when it rises more than one VBE above V+, with a single-ended range to +30V and a differential range to ±15V. |
| 10 | IN | input | Protected signal input that is clamped to V+ when it rises more than one VBE above V+, with a single-ended range to +30V and a differential range to ±15V. |
| 11 | IN | input | Protected signal input that is clamped to V+ when it rises more than one VBE above V+, with a single-ended range to +30V and a differential range to ±15V. |
| 12 | IN | input | Protected signal input that is clamped to V+ when it rises more than one VBE above V+, with a single-ended range to +30V and a differential range to ±15V. |
| 13 | IN | input | Protected signal input that is clamped to V+ when it rises more than one VBE above V+, with a single-ended range to +30V and a differential range to ±15V. |
| 14 | IN | input | Protected signal input that is clamped to V+ when it rises more than one VBE above V+, with a single-ended range to +30V and a differential range to ±15V. |
| 15 | IN | input | Protected signal input that is clamped to V+ when it rises more than one VBE above V+, with a single-ended range to +30V and a differential range to ±15V. |
| 16 | V+ | power_in | Positive supply pin; the SCR clamp to V+ triggers at one VBE diode threshold above V+, and the supply (V+) - (V-) operating range is 2V to 30V with absolute maximum 35V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse |
| Package | SOIC-16 |
| Category | Circuit Protection |
| Pins | 16 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input Leakage Current | IIN | -20 | 5 | 20 | nA |  | 2 |
| Quiescent Supply Current | IQUIESCENT |  | 50 | 200 | nA |  | 2 |
| Operating Voltage Range, VSUPPLY = [(V+) - (V-)] | VSUPPLY | 2 |  | 30 | V |  | 2 |
| Continuous Supply Voltage, (V+) - (V-) |  |  |  | 35 | V |  | 2 |
| Forward Peak Current, IIN to VCC, IIN to GND |  | -2 |  | 2 | A | 100µs | 2 |
| Maximum Storage Temperature Range |  | -65 |  | 150 | oC |  | 2 |
| Maximum Junction Temperature (Plastic Package) |  |  |  | 150 | oC |  | 2 |
| Maximum Lead Temperature (Soldering 20-40s) (SOIC Lead Tips Only) |  |  |  | 260 | oC | Soldering 20-40s, SOIC lead tips only | 2 |
| Operating Temperature Range | TA | -40 |  | 105 | oC |  | 2 |
| Thermal Resistance (Typical, Note 1) θJA, SOIC Package | θJA |  | 130 |  | oC/W | SOIC package; typical, Note 1 | 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: `SP720ABTG`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files: `sp720abtg-etched.step` / `sp720abtg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sp720abtg.step` / `sp720abtg.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Littelfuse datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588884664656809984) (6 pp, sha256 `070ba288abaa9564`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).

[Datasheet PDF](docs/sp720abtg-datasheet.pdf)