# HCPL-4503-500E

**Broadcom Limited** · Transistor, Photovoltaic Output Optoisolators · DIP-8

HCPL-4503-500E from Broadcom Limited, in a DIP-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 | NC | unconnected | No internal connection on this package; leave unconnected. |
| 2 | ANODE | input | LED anode; the LED reverse input voltage (pin 3-2) is limited to 5 V and the average forward input current to 25 mA. |
| 3 | CATHODE | input | LED cathode; the reverse LED input voltage (pin 3-2) is limited to 5 V. |
| 4 | NC | unconnected | No internal connection on this package; leave unconnected. |
| 5 | GND | power_in | Ground and reference for the supply (pin 8-5, max 30 V) and output (pin 6-5, max 20 V); a 0.1 µF bypass capacitor should be connected between pins 5 and 8. |
| 6 | VO | output | Open-collector output, rated 8 mA average and 16 mA peak output current, with output voltage limited to -0.5 V to 20 V referenced to pin 5. |
| 7 | NC | unconnected | No connection on the HCPL-4502/4503 (the base-current rating applies only to other devices in the family). |
| 8 | VCC | power_in | Supply voltage, rated -0.5 V to 30 V referenced to pin 5; a 0.1 µF bypass capacitor should be connected between pins 5 and 8. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Broadcom Limited |
| Package | DIP-8 |
| Category | Optoisolators |
| 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 |
|---|---|---|---|---|---|---|---|
| Storage Temperature | TS | -55 |  | 125 | °C |  | 9 |
| Operating Temperature (8-Pin DIP) | TA | -55 |  | 100 | °C |  | 9 |
| Average Forward Input Current | IF(AVG) |  |  | 25 | mA | Note 1: derate linearly above 70°C free-air at 0.8 mA/°C (8-Pin DIP) | 9 |
| Peak Transient Input Current | IF(TRANS) |  |  | 1 | A | ≤1 µs pulse width, 300 pps (8-Pin DIP) | 9 |
| Reverse LED Input Voltage (Pin 3-2) | VR |  |  | 5 | V | 8-Pin DIP | 9 |
| Input Power Dissipation | PIN |  |  | 45 | mW | Note 3: derate linearly above 70°C at 0.9 mW/°C (8-Pin DIP) | 9 |
| Average Output Current (Pin 6) | IO(AVG) |  |  | 8 | mA |  | 9 |
| Peak Output Current | IO(PEAK) |  |  | 16 | mA |  | 9 |
| Supply Voltage (Pin 8-5) | VCC | -0.5 |  | 30 | V |  | 9 |
| Output Voltage (Pin 6-5) | VO | -0.5 |  | 20 | V |  | 9 |
| Output Power Dissipation | PO |  |  | 100 | mW | Note 4: derate linearly above 70°C at 2.0 mW/°C (8-Pin DIP) | 9 |
| Lead Solder Temperature (through-hole parts only) | TLS |  |  | 260 | °C | 1.6 mm below seating plane, 10 seconds (8-Pin DIP) | 9 |
| Recommended operating temperature | TA | 0 |  | 70 | °C | Guaranteed performance over recommended temperature | 10 |
| Current Transfer Ratio (HCPL-4502/3) | CTR | 19 |  |  | % | TA = 25°C, VO = 0.4 V, IF = 16 mA, VCC = 4.5 V | 10 |
| Logic Low Output Voltage (HCPL-4502/3) | VOL |  | 0.1 | 0.4 | V | TA = 25°C, IO = 3.0 mA, IF = 16 mA, VCC = 4.5 V | 10 |
| Logic High Output Current | IOH |  | 0.003 | 0.5 | µA | TA = 25°C, VO = VCC = 5.5 V, IF = 0 mA | 10 |
| Logic High Output Current | IOH |  | 0.01 | 1 | µA | TA = 25°C, VO = VCC = 15 V | 10 |
| Logic High Output Current | IOH |  |  | 50 | µA | VO = VCC = 15 V | 10 |
| Logic Low Supply Current | ICCL |  | 50 | 200 | µA | IF = 16 mA, VO = Open, VCC = 15 V | 10 |
| Logic High Supply Current | ICCH |  | 0.02 | 1 | µA | TA = 25°C, IF = 16 mA, VO = Open, VCC = 15 V | 10 |
| Input Forward Voltage (8-Pin DIP) | VF |  | 1.5 | 1.7 | V | TA = 25°C, IF = 16 mA | 10 |
| Input Reverse Breakdown Voltage (8-Pin DIP) | BVR | 5 |  |  | V | IR = 10 µA | 10 |
| Propagation Delay Time to Logic Low (HCPL-4502/3) | tPHL |  | 0.2 | 0.8 | µs | TA = 25°C, RL = 1.9 kΩ | 11 |
| Propagation Delay Time to Logic High (HCPL-4502/3) | tPLH |  | 0.6 | 0.8 | µs | TA = 25°C, RL = 1.9 kΩ | 11 |
| Common Mode Transient Immunity at Logic High (HCPL-4503) | /CMH/ | 15 | 30 |  | kV/µs | IF = 0 mA, TA = 25°C, VCM = 1500 Vp-p, CL = 15 pF, RL = 1.9 kΩ | 11 |
| Common Mode Transient Immunity at Logic Low (HCPL-4503) | /CML/ | 15 | 30 |  | kV/µs | IF = 16 mA, TA = 25°C, VCM = 1500 Vp-p, CL = 15 pF, RL = 1.9 kΩ | 11 |
| Input-Output Momentary Withstand Voltage (8-Pin DIP) | VISO | 3750 |  |  | V rms | RH < 50%, t = 1 min., TA = 25°C | 12 |
| Input-Output Leakage Current (8-Pin DIP) | II-O |  |  | 1 | µA | 45% RH, t = 5 s, VI-O = 3 kVdc, TA = 25°C | 12 |

## CAD (KiCad official)

- Symbol: `HCPL-4503-500E`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: DIP-8 (KiCad packages3D, STEP)
- 3D model files: `hcpl-4503-500e-etched.step` / `hcpl-4503-500e-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hcpl-4503-500e.step` / `hcpl-4503-500e.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Broadcom Limited datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590928579092172800) (16 pp, sha256 `d0469b65d9f7cd39`, retrieved 2026-10-17, 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/hcpl-4503-500e-datasheet.pdf)