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Microchip Technology ATSHA204A-SSHDA-T
- Part No.:
- ATSHA204A-SSHDA-T
- Manufacturer:
- Microchip Technology
- Category:
- Specialized ICs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Description:
- IC AUTHENTICATION CHIP 8SOIC
- Quantity:
Unit Price:$0.36
Ext Price:$0.36
- Payment:
- Shipping:
Product Details
ATSHA204A-SSHDA-T - SHA-256 CryptoAuthentication IC
ATSHA204A-SSHDA-T from Microchip Technology is a hardware authentication device with SHA-256/HMAC acceleration, protected key storage and an I2C interface in an 8-lead SOIC package.
Technical and ordering values were checked against Microchip's ATSHA204A product page and data sheet.
Overview
ATSHA204A performs symmetric challenge-response authentication while keeping secret keys outside host-readable memory. It combines a SHA-256 engine, HMAC, hardware random-number generation, protected EEPROM slots and a factory-programmed unique serial number.
Key Advantages
Cryptographic keys remain in secured device storage.
SHA-256 and HMAC commands reduce host processing and firmware exposure.
A factory-programmed 72-bit serial number supports device identification.
The 8-SOIC body is convenient for prototypes and standard SMT production.
Feature Summary
4.5 Kbit EEPROM and a 512-bit OTP zone with configurable policies.
Supports up to 16 protected key slots.
The HDA code identifies an I2C option operating up to 1 MHz.
Specified below 150 nA for battery-sensitive designs.
Package & Footprint
The SSHDA-T option uses a standard-width 8-lead SOIC. The -T suffix denotes tape-and-reel supply, listed by Microchip at 4,000 units per reel.
- Use short supply and ground paths with local decoupling.
- Size I2C pull-ups for bus voltage, capacitance and target speed.
- Keep SDA and SCL clear of noisy switching nodes.
- Confirm orientation and pin 1 before assembly.
The package record and JPG are present in the LCDChip package library.
Pin Functions
Pins 1, 2, 3 and 7 are no-connect on this I2C SOIC option.
Key Specifications
| Cryptographic functions | SHA-256 and HMAC |
|---|---|
| EEPROM | 4.5 Kbit |
| OTP zone | 512 bit |
| Key slots | Up to 16 |
| Unique serial number | 72 bit |
| Interface | I2C, up to 1 MHz |
| Supply voltage | 2.0 V to 5.5 V |
| I/O range | 1.8 V to 5.5 V |
| Sleep current | <150 nA |
| Operating temperature | -40°C to +85°C |
| Package | 8-SOIC |
| Ordering format | Tape and reel, 4,000 units |
Replacement Considerations
ATSHA204A-SSHDA-B is the same SOIC/I2C device supplied in tubes rather than the -T tape-and-reel format. Confirm packaging quantity and assembly handling before substitution.
Do not replace a provisioned device as though it were a generic logic IC. Configuration bytes, secrets, lock status, I2C behavior and host command timing must match the deployed system.
Manufacturer Information
Microchip Technology supplies embedded control, connectivity and hardware-security products. ATSHA204A is listed as an in-production CryptoAuthentication device.
Applications
Checks approved modules, consumables and peripherals.
Adds hardware-backed identity to manufactured products.
Protects a device-specific symmetric secret outside host firmware.
Supports authenticated enablement of protected product functions.
Quality & Authenticity
Match the full SSHDA-T code and SOIC reel label to the purchase record. Maintain lot traceability and protect personalization data; authenticity of the silicon alone does not recreate customer-specific keys.
FAQ
Is ATSHA204A-SSHDA-T an ECC device?
No. It uses symmetric SHA-256/HMAC authentication.
Which bus does this version use?
The HDA ordering code identifies the I2C interface.
What differs from SSHDA-B?
The -T option is tape and reel; -B is tube packaging.
Can the same programmed unit be copied?
Protected secrets are designed not to be readable; replacements normally require controlled provisioning.
Engineering Notice
Validate wake timing, I2C pull-ups, command sequencing and power integrity before locking the device. Store provisioning credentials separately and base production procedures on the latest Microchip documentation.
ATSHA204A-SSHDA-T Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- CryptoAuthentication™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Authentication Chip
- Applications:
- Networking and Communications
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
- Grade:
- -
- Qualification:
- -
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Inventory:10
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In Stock:10
| Qty. | Unit Price | Ext. Price |
| 1+ | $0.36 | $0.36 |
| 25+ | $0.36 | $9.00 |
| 4000+ | $0.29 | $1160.00 |
