component
RPI-221A
Public Made by Adomby adom
ROHM Semicon Photointerrupters - Slot Type - Transistor Output, DIP-4. 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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README
markdownRPI-221A
ROHM Semicon · Photointerrupters - Slot Type - Transistor Output · DIP-4
RPI-221A from ROHM Semicon, in a DIP-4. 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 | Cathode | passive | LED (infrared emitter) cathode; max forward current 50 mA, reverse voltage 5 V, VF 1.3 V typ at IF=50 mA. |
| 2 | Anode | passive | LED (infrared emitter) anode; max forward current 50 mA, power dissipation 80 mW. |
| 3 | Collector | passive | Phototransistor collector; VCEO max 30 V, collector current max 30 mA, collector power dissipation 80 mW. |
| 4 | Emitter | passive | Phototransistor emitter; emitter-collector voltage max 4.5 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ROHM Semicon |
| Package | DIP-4 |
| Category | Optoelectronics |
| Pins | 4 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Forward current | IF | 50 | mA | 1 | |||
| Reverse voltage | VR | 5 | V | 1 | |||
| Power dissipation | PD | 80 | mW | 1 | |||
| Collector-emitter voltage | VCEO | 30 | V | 1 | |||
| Emitter-collector voltage | VECO | 4.5 | V | 1 | |||
| Collector current | IC | 30 | mA | 1 | |||
| Collector power dissipation | PC | 80 | mW | 1 | |||
| Operating temperature | Topr | -25 | 85 | °C | 1 | ||
| Storage temperature | Tstg | -30 | 85 | °C | 1 | ||
| Collector-emitter saturation voltage | VCE(sat) | 0.4 | V | IF =20mA, IC=0.1mA | 2 | ||
| Peak light emitting wavelength | λp | 950 | nm | 2 | |||
| Maximum sensitivity wavelength | λp | 800 | nm | 2 |
CAD (KiCad official)
- Symbol:
RPI-221A - Footprint:
Package_DIP:DIP-4_W7.62mm - 3D model: DIP-4 (KiCad packages3D, STEP)
- 3D model files:
rpi-221a-etched.step/rpi-221a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);rpi-221a.step/rpi-221a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ROHM Semicon datasheet (6 pp, sha256
d87b2e7329011e0d, retrieved 2026-10-15, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).