AT24C128C-SSHM-T

@@ -0,0 +1,47 @@+# AT24C128C-SSHM-T++**Microchip** · EEPROM · SOIC-8++AT24C128C-SSHM-T from Microchip, in a SOIC-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-wired to GND or VCC to set the chip's I²C slave address, allowing up to eight AT24C128C devices on one bus. Internally pulled to GND via a weak pull-down (disengages above ~0.5×VCC); Microchip recommends tying to a known state. External pull-up (if used) should be ≤10 kΩ. |+| 2 | A1 | input | Device address input, bit 1. Hard-wired to GND or VCC to select the I²C slave address. Internally pulled down to GND when floating; tie to a known state. External pull-up ≤10 kΩ recommended. |+| 3 | A2 | input | Device address input, bit 2. Hard-wired to GND or VCC to select the I²C slave address. Internally pulled down to GND when floating; tie to a known state. External pull-up ≤10 kΩ recommended. |+| 4 | GND | power_in | Ground reference for the power supply. Connect to the system ground plane. |+| 5 | SDA | bidirectional | I²C serial data - open-drain bidirectional input/output. Requires an external pull-up resistor to VCC (≤10 kΩ). May be wire-ORed with other open-drain devices on the same I²C bus. |+| 6 | SCL | input | I²C serial clock input. Commands and input data on SDA are latched on the rising edge of SCL; output data on SDA is clocked out on the falling edge. Must be driven high or pulled up externally when the bus is idle. |+| 7 | WP | input | Hardware write-protect input. Tie to GND for normal read/write operation; tie to VCC to inhibit all write operations to the entire memory array. Internally pulled down to GND when floating; tie to a known state. |+| 8 | VCC | power_in | Device power supply, 1.7V to 5.5V (2.5V to 5.5V required for 1 MHz Fast Mode Plus operation). Active current 3 mA max; standby current 6 µA max. Decouple with a local ceramic capacitor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Microchip |+| Package | SOIC-8 |+| Category | Memory |+| Pins | 8 |++## Ordering variants++- `AT24C128C-SSHM-TSSHM`++## CAD (KiCad official)++- Symbol: `AT24C128C-SSHM-T`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Microchip datasheet](docs/at24c128c-sshm-t-datasheet.pdf) (39 pp, sha256 `d583c8741b257ee2`, retrieved 2026-08-17, tier: manufacturer)+- **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/at24c128c-sshm-t-datasheet.pdf)

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