# FODM452

**onsemi** · Optocouplers - Logic Output · SOIC-5

FODM452 from onsemi, in a SOIC-5. 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 | ANODE | passive | LED anode; input-side pin, shorted with pin 3 for the two-terminal isolation test (forward current 16 mA typical test condition, 25 mA max average). |
| 3 | CATHODE | passive | LED cathode; input-side pin, shorted with pin 1 for the two-terminal isolation test. |
| 4 | GND | power_in | Output ground reference for the detector side. |
| 5 | VO | output | Open-collector detector output that is high when the LED is off and low when on; rated -0.5 to 20 V. |
| 6 | VCC | power_in | Output supply voltage for the detector, rated -0.5 to 30 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOIC-5 |
| Category | Optocoupler/LED/Digital Tube/Photoelectric Device |
| Pins | 5 |

## 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 Forward Voltage | VF |  | 1.6 | 1.7 | V | IF = 16 mA, TA = 25°C | 4 |
| Input Forward Voltage | VF |  |  | 1.8 | V | IF = 16 mA | 4 |
| Input Reverse Breakdown Voltage | BVR | 5 |  |  | V | IR = 10 µA | 4 |
| Logic High Output Current | IOH |  | 0.001 | 0.5 | µA | IF = 0 mA, VO = VCC = 5.5 V, TA = 25°C | 4 |
| Logic High Output Current | IOH |  | 0.001 | 1 | µA | IF = 0 mA, VO = VCC = 15 V, TA = 25°C | 4 |
| Logic High Output Current | IOH |  |  | 50 | µA | IF = 0 mA, VO = VCC = 15 V | 4 |
| Logic Low Supply Current | ICCL |  | 100 | 200 | µA | IF = 16 mA, VO = Open, VCC = 15 V | 4 |
| Logic High Supply Current | ICCH |  | 0.05 | 1 | µA | IF = 0 mA, VO = Open, VCC = 15 V, TA = 25°C | 4 |
| Logic High Supply Current | ICCH |  |  | 2 | µA | IF = 0 mA, VO = Open, VCC = 15 V | 4 |
| Current Transfer Ratio | CTR | 20 |  | 50 | % | IF = 16 mA, VCC = 4.5 V, TA = 25°C, VOL = 0.4 V | 4 |
| Current Transfer Ratio | CTR | 15 |  |  | % | IF = 16 mA, VCC = 4.5 V, VOL = 0.5 V | 4 |
| Logic LOW Output Voltage | VOL |  |  | 0.4 | V | IF = 16 mA, IO = 3 mA, VCC = 4.5 V, TA = 25°C | 4 |
| Logic LOW Output Voltage | VOL |  |  | 0.5 | V | IF = 16 mA, IO = 2.4 mA, VCC = 4.5 V | 4 |
| Propagation Delay Time to Logic LOW | TPHL |  | 0.4 | 0.8 | µs | RL = 1.9 kΩ, IF = 16 mA, TA = 25°C, VCC = 5 V | 4 |
| Propagation Delay Time to Logic LOW | TPHL |  |  | 1 | µs | RL = 1.9 kΩ, IF = 16 mA, VCC = 5 V | 4 |
| Propagation Delay Time to Logic HIGH | TPLH |  | 0.35 | 0.8 | µs | RL = 1.9 kΩ, IF = 16 mA, TA = 25°C, VCC = 5 V | 4 |
| Propagation Delay Time to Logic HIGH | TPLH |  |  | 1 | µs | RL = 1.9 kΩ, IF = 16 mA, VCC = 5 V | 4 |
| Common Mode Transient Immunity at Logic HIGH | /CMH/ | 5 | 15 |  | kV/µs | IF = 0 mA, VCM = 10 VP-P, RL = 1.9 kΩ, TA = 25°C | 4 |
| Common Mode Transient Immunity at Logic LOW | /CML/ | 5 | 15 |  | kV/µs | IF = 16 mA, VCM = 10 VP-P, RL = 1.9 kΩ, TA = 25°C | 4 |
| Withstand Insulation Test Voltage | VISO | 3750 |  |  | VRMS | RH ≤ 50%, TA = 25°C, t = 1 min. | 4 |
| Storage Temperature | TSTG | -40 |  | 125 | °C |  | 3 |
| Operating Temperature | TOPR | -40 |  | 85 | °C |  | 3 |
| DC/Average Forward Input Current | IF (avg) |  |  | 25 | mA | TA = 25°C | 3 |
| Peak Forward Input Current | IF (pk) |  |  | 50 | mA | 50% Duty Cycle, 1 ms P.W. | 3 |
| Peak Transient Input Current | IF (trans) |  |  | 1 | A | ≤1 µs P.W., 300 pps | 3 |
| Reverse Input Voltage | VR |  |  | 5 | V |  | 3 |
| Input Power Dissipation | PD |  |  | 45 | mW | No Derating Required over Specified Operating Temp Range | 3 |
| Average Output Current | IO (avg) |  |  | 8 | mA |  | 3 |
| Peak Output Current | IO (pk) |  |  | 16 | mA |  | 3 |
| Supply Voltage | VCC | -0.5 |  | 30 | V |  | 3 |
| Output Voltage | VO | -0.5 |  | 20 | V |  | 3 |
| Output Power Dissipation | PD |  |  | 100 | mW | No Derating Required over Specified Operating Temp Range | 3 |
| Temperature Coefficient of Forward Voltage | ΔVF/ΔTA |  | -1.8 |  | mV/°C | IF = 16 mA | 4 |
| Bandwidth | BW |  | 3 |  | MHz | RL = 100 Ω | 4 |
| Capacitance (Input to Output) | CI-O |  | 0.2 |  | pF | f = 1 MHz | 4 |

## CAD (KiCad official)

- Symbol: `FODM452`
- Footprint: `Package_SO:SOIC-5-6_4.4x3.6mm_P1.27mm`
- 3D model: SOIC-5 (KiCad packages3D, STEP)
- 3D model files: `fodm452-etched.step` / `fodm452-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fodm452.step` / `fodm452.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/fodm452-d.pdf) (12 pp, sha256 `0051423656abd70d`, retrieved 2026-10-27, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/fodm452-datasheet.pdf)