HK24C16HA-USR-B

@@ -0,0 +1,43 @@+# HK24C16HA-USR-B++**HK** · EEPROM · SOP-8++HK24C16HA-USR-B from HK, 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 / chip-select address input A0. Not used on HK24C16 (16Kbit variant) because the three MSBs of the internal word address consume the 5th-7th device-address bits; per datasheet 'HK24C16 chip select address pin A2, A1 and A0 are not used'. Tie to VIL or leave floating (internally recognized as VIL). |+| 2 | A1 | input | Device / chip-select address input A1. Not used on HK24C16; tie to VIL or leave floating (internally pulled to VIL). |+| 3 | A2 | input | Device / chip-select address input A2. Not used on HK24C16; tie to VIL or leave floating (internally pulled to VIL). |+| 4 | GND | power_in | Ground reference (0 V) for supply and I/O logic levels. |+| 5 | SDA | bidirectional | Serial data line for the 2-wire (I2C-compatible) bus. Open-drain output that can be wired-OR with other open-drain devices; requires an external pull-up resistor to VCC. Bidirectional data in/out at up to 1 MHz (5 V) or 400 kHz (1.8/2.5/2.7 V). |+| 6 | SCL | input | Serial clock input for the 2-wire bus. Rising edge latches data into the EEPROM, falling edge clocks data out. Schmitt-triggered input for noise immunity; requires external pull-up. |+| 7 | WP | input | Write-protect input. When tied to VIH or VCC, all programming (write) operations to the EEPROM array are disabled; read operations are unaffected. When left unconnected or tied to VIL, programming is allowed (internally recognized as VIL when floating). |+| 8 | VCC | power_in | Positive supply input. Operating range 1.8 V to 5.5 V. Typical currents: 10 nA standby, 200 µA read, 300 µA write (500 µA max). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HK |+| Package | SOP-8 |+| Category | Memory |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `HK24C16HA-USR-B`+- 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:** [HK datasheet](docs/hk24c16ha-usr-b-datasheet.pdf) (18 pp, sha256 `f53dc392d6661c3b`, 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/hk24c16ha-usr-b-datasheet.pdf)

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