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AT25040B-SSHL-T

Public Made by Adom

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Microchip Tech EEPROM, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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AT25040B-SSHL-T

Microchip Tech · EEPROM · SOIC-8

AT25040B-SSHL-T from Microchip Tech, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 CS input Chip Select: the device is selected when CS is low, and SO stays in high impedance while the device is not selected.
2 SO output Serial Data Output, which remains in a high-impedance state when the device is not selected or after an invalid opcode.
3 WP input Write Protect: when brought low, all write operations are inhibited, and WP must be held high during a WREN instruction.
4 GND power_in Ground reference for the device.
5 SI input Serial Data Input, which is ignored while SO is in the high-impedance state.
6 SCK input Serial Data Clock, which is always an input and sets the serial interface timing (up to 20MHz at 5V).
7 HOLD input Suspends serial communication when brought low while SCK is low, without resetting the serial sequence.
8 VCC power_in Power supply, specified from 1.8V to 5.5V.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package SOIC-8
Category Memory
Pins 8

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin U = Green, Matte Sn Lead Finish, 13

CAD (KiCad official)

  • Symbol: AT25040B-SSHL-T
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: at25040b-sshl-t-etched.step / at25040b-sshl-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); at25040b-sshl-t.step / at25040b-sshl-t.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Microchip Tech datasheet (23 pp, sha256 4783c65c38abe35e, retrieved 2026-10-28, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF