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Microchip Technology ATSHA204A-MAHDA-T
- Part No.:
- ATSHA204A-MAHDA-T
- Manufacturer:
- Microchip Technology
- Category:
- Specialized ICs
- Package:
- 8-UFDFN Exposed Pad
- Description:
- IC AUTHENTICATION CHIP 8UDFN
- Quantity:
Unit Price:$0.32
Ext Price:$0.32
- Payment:
- Shipping:
Product Details
ATSHA204A-MAHDA-T - SHA-256 CryptoAuthentication IC
ATSHA204A-MAHDA-T from Microchip Technology is a hardware authentication device with protected key storage, SHA-256/HMAC acceleration and an I2C interface, supplied in an 8-pad 2 mm × 3 mm UDFN package.
Technical and ordering data were checked against Microchip's ATSHA204A product page and data sheet.
Overview
ATSHA204A provides challenge-response authentication without exposing secret keys to the host MCU. It combines SHA-256, HMAC, a hardware random-number generator, protected EEPROM key slots and a factory-programmed unique serial number.
Key Advantages
Keys remain in hardware-protected storage during authentication operations.
Dedicated SHA-256 and HMAC functions reduce firmware cryptography work.
Each device includes a factory-programmed 72-bit serial number.
The MA package is an 8-pad 2 mm × 3 mm UDFN for space-constrained boards.
Feature Summary
4.5 Kbit EEPROM plus a 512-bit one-time-programmable zone.
Supports storage for up to 16 keys with configurable access policies.
The HDA ordering code provides an I2C interface operating up to 1 MHz.
Sleep current is specified below 150 nA.
Package & Footprint
The MAHDA-T ordering option uses an 8-pad 2 mm × 3 mm UDFN with exposed pad and I2C interface. The -T suffix is the large tape-and-reel option, listed by Microchip at 15,000 units per reel.
Expected library path: /upload/package/8-UDFN-Exposed-Pad.jpg
Pin Functions
Pins 1, 2, 3 and 7 are no-connect on the I2C UDFN option. Follow the official land pattern and exposed-pad guidance.
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 operating range | 1.8 V to 5.5 V |
| Sleep current | <150 nA |
| Operating temperature | -40°C to +85°C |
| Package | 8-pad 2 mm × 3 mm UDFN exposed pad |
Replacement Considerations
ATSHA204A-MAHDA-S is the same UDFN/I2C device in a smaller 3,000-unit reel option. Electrical behavior and footprint are unchanged, but supply media and procurement quantity differ.
For any functional replacement, confirm configuration-zone layout, key provisioning, host command timing, I2C address behavior and locked-device migration.
Manufacturer Information
Microchip Technology supplies embedded control, connectivity and hardware-security products. ATSHA204A is listed as an in-production CryptoAuthentication device.
Applications
Validates authorized modules, consumables and peripherals.
Supports secure challenge-response checks before enabling protected functions.
Stores a per-device identity and symmetric secret outside host firmware.
Adds hardware-backed identity to products and replaceable units.
Quality & Authenticity
Verify the complete MAHDA-T ordering code, package dimensions and reel label. Keep lot traceability and use an approved provisioning process; a genuine blank device is not equivalent to one carrying the required customer keys and configuration.
FAQ
Does ATSHA204A-MAHDA-T perform public-key cryptography?
No. It is a SHA-256/HMAC symmetric authentication device.
What interface does this suffix use?
The HDA suffix identifies the I2C option, specified up to 1 MHz.
Can keys be read back?
Protected keys are intended for internal cryptographic operations; access behavior is controlled by the configured and locked zones.
Is the package image ready?
No. The database package record exists, but the expected JPG is missing and must be supplied before publication.
Engineering Notice
Prototype the complete authentication flow before locking configuration or data zones. Confirm pull-ups, wake timing, power sequencing, provisioning custody and recovery procedures against the latest Microchip documentation.
ATSHA204A-MAHDA-T Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- CryptoAuthentication™
- Package/Case:
- 8-UFDFN Exposed Pad
- 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-UDFN (2x3)
- Grade:
- -
- Qualification:
- -
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Inventory:40,658
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In Stock:40,658
| Qty. | Unit Price | Ext. Price |
| 1+ | $0.32 | $0.32 |
| 25+ | $0.31 | $7.75 |
| 15000+ | $0.25 | $3750.00 |
