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ATECC508A-SSHDA-B

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

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ATECC508A-SSHDA-B

Microchip Tech · ATMEL & AVR · SOIC-8

ATECC508A-SSHDA-B 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 NC unconnected No connect pin.
2 NC unconnected No connect pin.
3 NC unconnected No connect pin.
4 GND power_in Ground.
5 SDA bidirectional Serial data pin for the I2C interface (this -SSHDA variant is the I2C configuration); the datasheet notes an external pull-up RL of 1.2k to VCC for AC measurements.
6 SCL input Serial clock input for the I2C interface, with fSCK of 0 to 1 MHz.
7 NC unconnected No connect pin.
8 VCC power_in Power supply, 2.0V to 5.5V operating range.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package SOIC-8
Category Embedded Processors & Controllers
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Power Supply Voltage VCC 2 5.5 V 8
Ambient Operating Temperature TA -40 85 °C 8
Active Power Supply Current (waiting for I/O / non-ECC commands) ICC 3 6 mA Waiting for I/O during I/O transfers or execution of non-ECC commands when ChipMode:3 is zero 8
Active Power Supply Current (ECC command execution) ICC 16 mA During ECC command execution 8
Idle Power Supply Current IIDLE 800 µA Idle mode, VSDA and VSCL < 0.4V or > VCC, 0.4 8
Sleep Current ISLEEP 30 150 nA Sleep mode, VCC ≤ 3.6V, VSDA and VSCL < 0.4V or > VCC, 0.4, TA ≤ 55°C 8
Sleep Current ISLEEP 2 µA When device is in sleep mode 8
Output Low Voltage VOL 0.4 V Active mode, VCC = 2.5, 5.5V 8
Output Low Current IOL 4 mA Active mode, VCC = 2.5, 5.5V, VOL = 0.4V 8
Input Low Voltage VIL -0.5 0.5 V Device active and TTLenable bit zero 8
Input High Voltage VIH 1.5 5.5 V Device active and TTLenable bit zero; max printed as VCC + 0.5 8
Theta JA SOIC (SSH) ΘJA 166 C/W SOIC (SSH) 8
Operating Temperature -40 85 °C 5
Storage Temperature -65 150 °C 5
Maximum Operating Voltage 6 V 5
DC Output Current 5 mA 5
Voltage on any pin -0.5 5.5 V -0.5V to (VCC + 0.5V) 5
Write Endurance (each byte) 400000 Write Cycles at 85C 5
Data Retention 10 Years at 55C 5
Data Retention 30 50 Years at 35C 5
Power-Up Delay tPU 100 µs To Crypto Authentication; min time between VCC > VCC min prior to measurement of tWLO 5
Wake Low Duration tWLO 60 µs To Crypto Authentication 5
Wake High Delay to Data Comm. tWHI 500 µs To Crypto Authentication; SDA stable high 5
Watchdog Timeout tWATCHDOG 0.7 1.3 1.7 s Max time from wake until device forced into sleep 5
SCK Clock Frequency fSCK 0 1 MHz TA = -40°C to +85°C, VCC = 2.0V to 5.5V 7
SCK High Time tHIGH 400 ns 7
SCK Low Time tLOW 400 ns 7
Start Setup Time tSU.STA 250 ns 7
Start Hold Time tHD.STA 250 ns 7
Stop Setup Time tSU.STO 250 ns 7
Data In Setup Time tSU.DAT 100 ns 7
Data In Hold Time tHD.DAT 0 ns 7
Input Rise Time tR 300 ns Based on characterization, not tested 7
Input Fall Time tF 100 ns Based on characterization, not tested 7
Clock Low to Data Out Valid tAA 50 550 ns 7
Data Out Hold Time tDH 50 ns 7
SMBus Timeout Delay tTIMEOUT 25 75 ms 7
Bus free time before new transmission tBUF 500 ns Based on characterization, not tested 7

CAD (KiCad official)

  • Symbol: ATECC508A-SSHDA-B
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: atecc508a-sshda-b-etched.step / atecc508a-sshda-b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atecc508a-sshda-b.step / atecc508a-sshda-b.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (14 pp, sha256 409187c807907375, retrieved 2026-10-23, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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