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ATSHA204A-SSHDA-T
SOIC-8 (3.9x4.9mm)
The ATSHA204A-SSHDA-T from Microchip is a SHA-256 cryptographic authentication IC with 4.5Kb EEPROM, 16 key slots, unique 72-bit serial number, and I2C/Single-Wire interface in SOIC-8 for secure authentication and anti-counterfeiting.
| الحزمة | SOIC-8 (3.9×4.9mm) |
The ATSHA204A-SSHDA-T from Microchip is a SHA-256 cryptographic authentication IC with 4.5Kb EEPROM, 16 key slots, unique 72-bit serial number, and I2C/Single-Wire interface in SOIC-8 for secure authentication and anti-counterfeiting.
The ATSHA204A-SSHDA-T is a cryptographic authentication IC from Microchip in SOIC-8, implementing SHA-256 hash-based challenge-response authentication. The device contains a 4.5Kbit EEPROM organized into 16 slots (32 bytes each) for storing keys, certificates, and data. The key security feature is that slot 0-3 can be configured as read-only or never-read (secret keys), ensuring private keys never leave the device. Authentication works as follows: (1) The host MCU sends a random challenge (32 bytes) to the ATSHA204A; (2) The ATSHA204A concatenates the challenge with the internal secret key and other data; (3) It computes SHA-256 of the concatenated message; (4) It returns the 32-byte digest to the host; (5) The host independently computes the expected digest using the known key and compares. If they match, the peripheral is authenticated. The device also supports HMAC (Hash-based Message Authentication Code) for bidirectional authentication. The single-wire interface uses a standard I2C-style open-drain bus: the host pulls SDA LOW to start a wake-up pulse (60us minimum), then the device responds after 1.3ms wake-up time. Commands and data are exchanged using a custom bit-serial protocol with specific timing requirements. The device includes a hardware random number generator (RNG) for generating challenges and nonces. The 100k write cycle endurance per slot supports key rotation. The -SSHDA-T suffix specifies SOIC-8 with 1.8V-5.5V supply, industrial temperature (-40C to +85C), tape-and-reel.
| دبوس | الاسم | النوع | الوظيفة |
|---|---|---|---|
| 1 | نورث كارولاينا | - | No connect |
| 2 | نورث كارولاينا | - | No connect |
| 3 | نورث كارولاينا | - | No connect |
| 4 | GND | الطاقة | أرضي |
| 5 | SDA | الإدخال/الإخراج | Single-wire data (open-drain, requires external pull-up resistor 4.7k-ohm) |
| 6 | نورث كارولاينا | - | No connect |
| 7 | نورث كارولاينا | - | No connect |
| 8 | VCC | الطاقة | Supply (2.0-5.5V) |
| الشركة المصنعة | رقم الجزء | الحزمة | الملاحظات |
|---|---|---|---|
| الرقاقة الدقيقة | ATECC508A-SSHDA-T | SOIC-8 | ECC PKE crypto, same form factor, upgrade path |
| الرقاقة الدقيقة | ATECC608A-SSHDA-T | SOIC-8 | ECC PKE + AES, latest generation |
| إنفينيون | OPTIGA TRUST M SLS32AIA010M | USON-10 | ECC PKE, I2C, secure element |
| NXP | SE050F2ZH1 | WLCSP-25 | ECC/RSA, I2C, advanced secure element |
| STMicroelectronics | STSAFE-A110 | SOIC-8 | ECC PKE, I2C, secure authentication |
العلامة التجارية:
الحزمة:
دورة الشحن 3 ~ 7 أيام
الحد الأدنى للطلب هو 1
العلامة التجارية:
الحزمة:
دورة الشحن 3 ~ 7 أيام
الحد الأدنى للطلب هو 1
العلامة التجارية:
الحزمة:
دورة الشحن 3 ~ 7 أيام
الحد الأدنى للطلب هو 1
العلامة التجارية:
الحزمة:
دورة الشحن 3 ~ 7 أيام
الحد الأدنى للطلب هو 1
العلامة التجارية:
الحزمة:
دورة الشحن 3 ~ 7 أيام
الحد الأدنى للطلب هو 1
العلامة التجارية:
الحزمة:
دورة الشحن 3 ~ 7 أيام
الحد الأدنى للطلب هو 1
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