24LC256

@@ -0,0 +1,53 @@+# 24LC256++**Microchip Technology** · I2C serial EEPROM · SOIC-8++256 Kbit (32K x 8) I2C serial EEPROM in a SOIC-8 package. It runs from 2.5-5.5 V at up to 400 kHz, with a 64-byte page-write buffer and a hardware write-protect pin. Three address pins (A0-A2) let up to eight devices share one I2C bus. The default off-chip non-volatile storage for configuration, logs, and calibration next to an MCU.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | A0 | input | User-configurable chip-select address bit 0. Compared with the corresponding bit of the incoming slave address; must be tied to VCC or VSS. Combined with A1/A2 to allow up to 8 devices on one I2C bus. |+| 2 | A1 | input | User-configurable chip-select address bit 1. Compared with the corresponding bit of the incoming slave address; must be tied to VCC or VSS. |+| 3 | A2 | input | User-configurable chip-select address bit 2. Compared with the corresponding bit of the incoming slave address; must be tied to VCC or VSS. |+| 4 | VSS | power_in | Ground reference for the device. |+| 5 | SDA | bidirectional | Bidirectional serial address/data I/O. Open-drain output; requires an external pull-up resistor to VCC (typ. 10 kΩ for 100 kHz, 2 kΩ for 400 kHz and 1 MHz). Data may change only while SCL is low. |+| 6 | SCL | input | Serial clock input used to synchronize data transfers to and from the device. Schmitt-trigger input for noise suppression. |+| 7 | WP | input | Write-protect input. Tie to VSS to enable writes; tie to VCC to inhibit write operations (reads are unaffected). Must not be left floating. |+| 8 | VCC | power_in | Positive supply input. Operating range 2.5V to 5.5V for 24LC256. Decouple with a local bypass capacitor to VSS. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | I2C serial EEPROM |+| Capacity | 256 Kbit (32K x 8) |+| Interface | I2C, up to 400 kHz |+| Supply voltage | 2.5-5.5 V |+| Page write | 64-byte buffer |+| Write protect | WP pin (hardware) |+| Addressing | A0-A2 (up to 8 on a bus) |+| Package | SOIC-8 |+| Body (L×W×H) | 4.9 × 3.9 × 1.75 mm |++## Ordering variants++- `24LC256-I/SN (SOIC-8, tube)`+- `24LC256T-I/SN (SOIC-8, tape & reel)`++## CAD (KiCad official)++- Symbol: `Memory_EEPROM:24LC256`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Microchip Technology datasheet](https://ww1.microchip.com/downloads/en/DeviceDoc/24AA256-24LC256-24FC256-Data-Sheet-20001203W.pdf) (42 pp, sha256 `ee9e9f15a6ce94e3`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude) — every pin and dimension is cited to a datasheet page; refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/24lc256-datasheet.pdf)

@@ -0,0 +1,35 @@+{+  "slug": "24lc256",+  "version": "0.1.0",+  "type": "component",+  "description": "Microchip 256 Kbit I2C EEPROM, SOIC-8. 32K x 8, 2.5-5.5 V, 400 kHz, 64-byte page. Datasheet-verified.",+  "tags": [+    "component",+    "memory",+    "eeprom",+    "i2c",+    "soic-8",+    "microchip"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "24lc256.kicad_sym",+    "24lc256.kicad_mod",+    "24lc256.glb",+    "docs/hero.png",+    "docs/24lc256-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file