# EPCS4SI8N

**Intel/Altera** · Non-Volatile Memory (ROM) · SOIC-8

EPCS4SI8N from Intel/Altera, in a SOIC-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 | nCS | input | Chip select: low enables the device (active), high deselects it and tri-states DATA; a falling edge is required after power-up before any operation. |
| 2 | DATA | output | Serial data output to the FPGA during read operation or configuration, transitioning on the falling edge of DCLK. |
| 3 | VCC | power_in | Power pin, connect to a 3.3-V power supply (2.7 V to 3.6 V operation). |
| 4 | GND | power_in | Ground pin. |
| 5 | ASDI | input | AS data input that serially receives instructions and data to be programmed, latched on the rising edge of DCLK. |
| 6 | DCLK | input | Serial clock provided by the FPGA that times the serial interface; ASDI is latched on the rising edge. |
| 7 | VCC | power_in | Power pin, connect to a 3.3-V power supply (2.7 V to 3.6 V operation). |
| 8 | VCC | power_in | Power pin, connect to a 3.3-V power supply (2.7 V to 3.6 V operation). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Intel/Altera |
| Package | SOIC-8 |
| Category | Memory |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `EPCS4SI8N`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `epcs4si8n-etched.step` / `epcs4si8n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `epcs4si8n.step` / `epcs4si8n.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Intel/Altera datasheet](docs/epcs4si8n-datasheet.pdf) (40 pp, sha256 `4c08591a67e2cd71`, retrieved 2026-10-22, tier: lcsc)
- **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/epcs4si8n-datasheet.pdf)