AT24C128-HXY

@@ -0,0 +1,43 @@+# AT24C128-HXY++**HXY MOSFET** · EEPROM · SOP-8++AT24C128-HXY from HXY MOSFET, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | A0 | input | Device address input bit 0. Hard-wire to VSS or VCC to set the chip's 3-bit I2C hardware address, allowing up to 8 devices on the same 2-wire bus. Floating pins are internally read as VSS (low). |+| 2 | A1 | input | Device address input bit 1. Hard-wire to VSS or VCC to set the chip's 3-bit I2C hardware address. Floating pins are internally read as VSS (low). |+| 3 | A2 | input | Device address input bit 2. Hard-wire to VSS or VCC to set the chip's 3-bit I2C hardware address. Floating pins are internally read as VSS (low). |+| 4 | VSS | power_in | Negative power supply / ground reference (0 V). |+| 5 | SDA | bidirectional | I2C serial data line. Bidirectional open-drain; requires an external pull-up resistor to VCC. May be wired-OR with other open-drain devices on the same bus. |+| 6 | SCL | input | I2C serial clock input. Positive edge clocks data into the EEPROM; negative edge clocks data out. Max clock rate 400 kHz at 2.2-5.5V, 1 MHz at 2.5-5.5V. |+| 7 | WP | input | Write protect. When tied to VCC, the entire 128K array is write-protected (device operates as a serial ROM). When tied to VSS or left floating, normal read/write operations are permitted. |+| 8 | VCC | power_in | Positive supply voltage, 2.2 V to 5.5 V. Standby current ~1 uA typ; read current ~2 mA typ at 400 kHz; write current ~5 mA max at 400 kHz. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HXY MOSFET |+| Package | SOP-8 |+| Category | Memory |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `AT24C128-HXY`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [HXY MOSFET datasheet](docs/at24c128-hxy-datasheet.pdf) (11 pp, sha256 `319b055bd9031a8d`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/at24c128-hxy-datasheet.pdf)

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