AT25640B-SSHL-T

@@ -0,0 +1,47 @@+# AT25640B-SSHL-T++**Microchip** · EEPROM · SOIC-8++AT25640B-SSHL-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 | CS | input | Chip Select, active-low. Drives the device into the active state when low, enabling the SPI interface; when high, the device is deselected and SO is high-impedance. |+| 2 | SO | output | Serial Data Output. Tri-state output; shifts data out on the falling edge of SCK. High-impedance when CS is high. |+| 3 | WP | input | Write Protect, active-low. When low with WPEN=1, blocks writes to the status register (hardware write protection); when high, normal read/write operations proceed. Function disabled when WPEN=0. |+| 4 | GND | power_in | Ground reference for all logic and supply. |+| 5 | SI | input | Serial Data Input. Data is shifted in MSB-first on the rising edge of SCK when CS is low. |+| 6 | SCK | input | Serial Clock. Supports SPI Modes 0 (0,0) and 3 (1,1). Max 20MHz at 5V, 10MHz at 2.5V, 5MHz at 1.8V. |+| 7 | HOLD | input | Hold, active-low. Suspends serial communication without resetting the internal sequence; SO enters high-impedance and SI is ignored while HOLD is low. Must be transitioned only while SCK is low. |+| 8 | VCC | power_in | Supply voltage, 1.8V to 5.5V. Standby current typ 2.0µA at 5V; active current typ 7.5mA reading at 20MHz/5V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Microchip |+| Package | SOIC-8 |+| Category | Memory |+| Pins | 8 |++## Ordering variants++- `AT25640B-SSHL-T`++## CAD (KiCad official)++- Symbol: `AT25640B-SSHL-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/at25640b-sshl-t-datasheet.pdf) (23 pp, sha256 `6eb63f39b2e61b60`, 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/at25640b-sshl-t-datasheet.pdf)

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