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AT93C56B-SSHM-T

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by Ray

Microchip EEPROM, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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README

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AT93C56B-SSHM-T

Microchip · EEPROM · SOIC-8

AT93C56B-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 CS input Chip Select. Active-high input that enables the device and frames each 3-wire instruction; a rising edge on CS starts every instruction, and CS must be held high for the duration of the transfer. Also used to poll the internal Ready/Busy status on DO during self-timed erase/write cycles.
2 SK input Serial Data Clock. Shift clock input used to strobe the opcode/address/data bits on DI (on rising edges) and to clock read data out on DO. Maximum frequency 2 MHz at Vcc >= 4.5V, 1 MHz at 2.5V, 250 kHz at 1.7V.
3 DI input Serial Data Input. Receives the start bit, opcode, address, and (for WRITE/WRAL) data bits, sampled on the rising edge of SK.
4 DO tri_state Serial Data Output. Clocks out read data synchronously with SK and reports Ready/Busy status during self-timed erase/write cycles (Logic 0 = busy, Logic 1 = ready). High-impedance when the device is not driving.
5 GND power_in Ground reference for the device.
6 ORG input Internal Organization select. Tie to Vcc for x16 organization (128 x 16), tie to GND for x8 organization (256 x 8). If left unconnected an internal ~1 MOhm pull-up selects x16; do not load beyond that pull-up capability if leaving floating.
7 NC unconnected No connect. Not internally bonded; leave floating or tie to any convenient net.
8 VCC power_in Power supply input, 1.7V to 5.5V operating range (absolute max 6.25V). Typical Icc 0.5 mA read/write at 1 MHz; standby currents 0.4/6/10 uA typ at Vcc = 1.7/2.5/5.0V. Note: ERAL and WRAL instructions are valid only at Vcc >= 4.5V.

Key specifications

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

Ordering variants

  • AT93C56B-SSHM-T

CAD (KiCad official)

  • Symbol: AT93C56B-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 (20 pp, sha256 a8f94e4f95c2bbd5, 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