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Microchip Technology ATSHA204-SH-DA-T
- Part No.:
- ATSHA204-SH-DA-T
- Manufacturer:
- Microchip Technology
- Category:
- Specialized ICs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Description:
- IC AUTHENTICATION CHIP 8SOIC
- Quantity:
Unit Price:$0
Ext Price:$0
- Payment:
- Shipping:
Product Details
ATSHA204-SH-DA-T - CryptoAuthentication IC
Microchip Technology ATSHA204-SH-DA-T is a SHA-256 authentication device with an I²C interface in an 8-lead SOIC package, supplied on tape and reel.
Technical characteristics and the exact ordering code are checked against the manufacturer ATSHA204 datasheet, revision 8740H (July 2014).
Overview
The ATSHA204 performs challenge-response authentication and message authentication using an internal SHA-256 engine. Its nonvolatile storage supports secret keys, configuration, and one-time-programmable information. The SH-DA-T ordering suffix specifically selects the I²C-configured 8-lead SOIC tape-and-reel variant.
Key Advantages
SHA-256 MAC and HMAC operations help validate a host, accessory, or embedded module.
Nonvolatile key slots and device locking reduce the need to expose secret material to application firmware.
A guaranteed unique 72-bit serial number supports device identification.
Sleep mode supports battery-sensitive designs when the documented electrical conditions are met.
Feature Summary
SHA-256 engine, MAC/HMAC options, hardware random-number generator, and host/client operations.
4.5 Kbit EEPROM for keys and data, with 512 OTP bits for fixed information.
This DA ordering configuration uses I²C, rated up to 1 MHz in the manufacturer datasheet.
Key configuration and locking must be planned before irreversible provisioning steps.
Package & Footprint
The ordering table specifies an 8-lead SOIC package, tape and reel. The site's normalized package registration is 8-SOIC for the existing 0.154-inch (3.90 mm) body-width category.
- Confirm land pattern and orientation against the manufacturer's SOIC drawing.
- Verify pin 1 before assembly and distinguish the DA I²C option from the CZ single-wire option.
- Review trace routing and pull-ups for the I²C bus.
The normalized package entry and local 8-SOIC JPG were verified; the picture is a package illustration, not a substitute for mechanical dimensions.
Pin Functions
Top-view 8-lead SOIC pin functions from the manufacturer's pin-configuration figure:
No connect.
Ground.
I²C serial data.
I²C serial clock input.
No connect.
Power supply.
Use the manufacturer's top-view diagram for physical orientation; this pin list is specific to the SOIC I²C ordering option.
Key Specifications
| Manufacturer | Microchip Technology (Atmel ATSHA204 documentation) |
|---|---|
| Ordering code | ATSHA204-SH-DA-T |
| Function | SHA-256 authentication device |
| Interface configuration | I²C |
| I²C clock frequency | Up to 1 MHz |
| Supply voltage | 2.0 to 5.5 V |
| Ambient operating temperature | −40 to +85 °C |
| Key length | 256 bits |
| Key storage | Up to 16 keys |
| Serial number | Guaranteed unique 72 bits |
| EEPROM | 4.5 Kbit for keys and data |
| OTP memory | 512 bits |
| Sleep current | 150 nA maximum at VCC ≤3.6 V and TA ≤55 °C under stated pin conditions; 2 µA maximum otherwise in sleep mode |
| Package / supply form | 8-lead SOIC / tape and reel |
Limits and conditions are from the manufacturer datasheet; the 150 nA sleep limit is not a blanket full-range specification.
Replacement Considerations
Microchip identifies ATSHA204A as the successor for new designs. It is a redesign candidate, not an asserted drop-in replacement. Verify the exact I²C ordering code, package drawing, command compatibility, memory configuration, timing, key-provisioning flow, and host firmware before substitution. The ATSHA204-SH-CZ-T is a single-wire version and must not be substituted solely on package similarity.
No internal alternative is linked without a verified exact product record.
Manufacturer Information
Microchip Technology publishes the legacy Atmel ATSHA204 CryptoAuthentication datasheet. The manufacturer's ordering table explicitly lists ATSHA204-SH-DA-T as the I²C, 8-lead SOIC tape-and-reel variant. Consult the current manufacturer documentation and errata during design or lifecycle decisions.
Applications
Validate replaceable modules and consumables with challenge-response exchanges.
Use authenticated data as part of a host-controlled boot-validation design.
Authenticate nodes or devices before granting access to a system.
Support authenticated communication and key-exchange workflows.
Quality & Authenticity
Verify the complete ordering code, reel label, traceability, and handling records. The manufacturer notes that the ordering code does not appear on the package body; package marking alone is not a reliable incoming-inspection method. Security-device configuration and lock state should be checked against the intended provisioning procedure.
FAQ
Which interface does this exact order code use?
ATSHA204-SH-DA-T is the I²C-configured variant; SH-CZ-T is the single-wire SOIC variant.
Can ATSHA204A be substituted automatically?
No. Check electrical, protocol, command, configuration, and provisioning compatibility for the complete ATSHA204A order code.
Is the body marking sufficient to identify the order code?
No. The manufacturer's ordering notes say the full order code is not marked on the package.
Engineering Notice
ATSHA204 is not recommended for new designs. Review the manufacturer's errata for I/O level limits and the I²C Idle-command behavior, and validate the full provisioning and firmware workflow before production. Observe the documented voltage, temperature, and sleep-current test conditions.
ATSHA204-SH-DA-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:
- Obsolete
- 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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