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Microchip Technology AT24MAC602-STUM-T
- Part No.:
- AT24MAC602-STUM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AT24MAC602-STUM-T.pdf
- Description:
- IC EEPROM 2KBIT I2C 1MHZ SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:27,876
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Product details
Overview
AT24MAC602-STUM-T from Microchip Technology (formerly Atmel) is a 2-Kbit I²C-compatible serial EEPROM with factory-programmed, permanently locked EUI-64™ address and guaranteed unique 128-bit serial number. It operates from 1.7V to 5.5V, supports 1 MHz I²C at 2.5V/5.0V, and delivers 1,000,000 write cycles with 100-year data retention - deployed in networked embedded systems requiring globally unique device identity and secure firmware parameter storage.
For engineers reviewing the AT24MAC602-STUM-T datasheet, AT24MAC602-STUM-T pinout, AT24MAC602-STUM-T application, or AT24MAC602-STUM-T equivalent, this page provides verified electrical specs, hardware/software write protection behavior, EUI-64 memory map access protocol, and real-world use cases for MAC address provisioning and device serialization in industrial IoT nodes and Ethernet peripherals.
Technical Context
The AT24MAC602-STUM-T implements a dedicated extended memory block outside the main 256 × 8-bit array to store its read-only 64-bit EUI address (at 98h–9Fh) and 128-bit serial number (at 80h–8Fh), both factory-programmed and permanently write-protected. Its I²C interface uses Schmitt-trigger inputs and supports bi-directional data transfer with acknowledge polling during internal write cycles.
Hardware write protection is controlled by the WP pin (active-high), while software protection includes reversible and permanent modes targeting only the first-half (00h–7Fh) of the standard array. The device supports 16-byte page writes with auto-incrementing lower address bits and requires no external components for noise suppression due to integrated input filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8), organized as 16 pages of 16 bytes - enables efficient firmware configuration storage without external address latches. |
| I²C Speed | Up to 1 MHz at VCC ≥ 2.5V; 400 kHz minimum at 1.7V - ensures compatibility with legacy and high-speed microcontrollers across voltage rails. |
| EUI Address | Factory-programmed, read-only 64-bit EUI-64 stored at 98h–9Fh - eliminates need for external MAC address management in Ethernet/Wi-Fi modules. |
| Serial Number | Guaranteed unique 128-bit value stored at 80h–8Fh, shared across AT24CS/AT93CS/AT25S families - enables traceability and anti-cloning in production firmware. |
| Write Protection | Three-tier: hardware (WP pin), reversible software (RSWP), and permanent software (PSWP) - allows flexible field-upgrade policies without compromising root identity. |
| Endurance & Retention | 1,000,000 write cycles; 100-year data retention - meets long-life requirements for industrial controllers and medical devices. |
| Supply Range | 1.7V to 5.5V operation - supports direct interfacing with 1.8V, 3.3V, and 5V logic domains without level shifters. |
Pinout & Package
AT24MAC602-STUM-T is supplied in an 8-lead JEDEC SOIC package (STUM = SOIC-8). Pin functions are electrically validated per Atmel-8807E datasheet Figure 1 and Section 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hard-wired pins enabling up to eight devices on one I²C bus; required for standard memory access (1010xxxx) and extended feature access (1011xxxx). |
| SDA | Serial Data I/O | Open-drain bidirectional line; must be pulled up externally - interfaces directly with I²C masters without buffering. |
| SCL | Serial Clock Input | Positive-edge clock for data input, negative-edge for data output - defines timing for all read/write operations per I²C specification. |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes; tied to GND enables full read/write - critical for preventing accidental overwrites in field-deployed units. |
| GND | Ground Reference | System return path for VCC and signal lines - must be low-impedance to maintain noise immunity during high-speed I²C transfers. |
| VCC | Power Supply | 1.7V–5.5V supply input; powers internal high-voltage pump for EEPROM programming - supports wide-input power architectures. |
Key Features
| Feature | Design Value |
|---|---|
| EUI-64™ Address Storage | Read-only 64-bit IEEE-compliant identifier pre-programmed at factory and stored separately from user memory - guarantees uniqueness and eliminates post-manufacturing MAC provisioning steps. |
| 128-bit Unique Serial Number | Atmel-guaranteed unique value shared across AT24CS/AT93CS/AT25S families and stored in protected extended memory - enables cross-product device tracking and cryptographic key binding. |
| Triple Write Protection | Combines hardware (WP pin), reversible software (RSWP), and permanent software (PSWP) modes - supports secure boot partitioning, field firmware updates, and immutable identity lockdown. |
| 16-byte Page Write | Allows burst programming of up to 16 bytes per transaction with automatic address increment - reduces I²C bus overhead and accelerates parameter table writes. |
| Noise-Resilient I²C Interface | Schmitt-trigger inputs and internal filtering suppress EMI-induced glitches - maintains reliable communication in motor drives and power-conversion environments. |
Applications
| Industrial Ethernet Node | Wi-Fi Module Identity |
|---|---|
|
Use Scenario: Embedded PLC with integrated 10/100 Mbps Ethernet PHY requiring persistent, tamper-resistant MAC address assignment. IC Role / Device Role / Timing Role: Stores EUI-64 address used by MAC controller during link initialization; serves as nonvolatile identity source independent of firmware version. Use Value: Eliminates need for external MAC programming during manufacturing; prevents duplicate addresses in distributed control networks via guaranteed uniqueness. |
Use Scenario: Consumer-grade Wi-Fi module where each unit must present distinct BSSID and device ID to cloud services. IC Role / Device Role / Timing Role: Provides factory-assigned EUI-64 and serial number to host MCU during boot - used for TLS certificate generation and OTA update authentication. Use Value: Enables zero-touch provisioning and secure device onboarding without cloud-side MAC allocation logic or manual labeling. |
| Firmware Configuration Vault | Medical Device Serialization |
|
Use Scenario: Portable diagnostic instrument storing calibrated sensor offsets, user preferences, and audit logs across power cycles. IC Role / Device Role / Timing Role: Acts as trusted parameter store with hardware write protection enabled during normal operation - prevents corruption during brown-out events. Use Value: Ensures regulatory compliance (IEC 62304) by preserving calibration integrity and supporting deterministic firmware rollback using version-stamped config blocks. |
Use Scenario: FDA-regulated infusion pump requiring UDI (Unique Device Identification) compliant serialization and traceability across production batches. IC Role / Device Role / Timing Role: Hosts 128-bit serial number linked to MDS2 and GUDID databases; accessed by production test system during final functional verification. Use Value: Meets 21 CFR Part 820.65 requirements for permanent, unalterable device identification without custom laser marking or database dependencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM with embedded identity applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24MAC402-STUM-T | EUI-48 (48-bit) instead of EUI-64; same memory size, pinout, and protection features - lacks native 64-bit address for IPv6-ready stacks. | Used where legacy MAC-48 format suffices (e.g., older Ethernet switches); cannot generate EUI-64 without software FFFE insertion. | Select when cost sensitivity outweighs future IPv6 scalability needs; verify OUI compatibility with existing network management tools. |
| M95M02-DRMN6TP/K | 2-Mbit SPI EEPROM (not I²C); no factory-programmed EUI or serial number; supports 5 MHz SPI but lacks identity features entirely. | Applicable only if host MCU has SPI interface and identity is managed externally (e.g., via secure element or cloud service). | Choose only when I²C bus is saturated and identity provisioning is handled elsewhere - not a functional substitute for AT24MAC602-STUM-T's embedded identity capability. |
Compared with AT24MAC402-STUM-T and M95M02-DRMN6TP/K, the AT24MAC602-STUM-T uniquely delivers native EUI-64 support with zero software overhead, making it the sole option among these three for standards-compliant IPv6 node addressing and unified device serialization across Atmel/Microchip product families.
Availability
AT24MAC602-STUM-T is available at Aetrix Electronics and suitable for industrial Ethernet nodes, Wi-Fi module identity provisioning, firmware configuration vaults, medical device serialization, and secure boot parameter storage requiring stable component supply and long-term lifecycle assurance.
Supply support for AT24MAC602-STUM-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology acquired Atmel in 2016 and continues to manufacture and support the AT24MAC family of identity-enabled serial EEPROMs with full backward compatibility and extended product longevity commitments.
The AT24MAC602-STUM-T belongs to Microchip's MAC Serial EEPROM product line, designed specifically to embed globally unique IEEE identifiers and cryptographic serial numbers into resource-constrained edge devices - reducing firmware complexity and accelerating time-to-certification for networked products.
FAQ
What is the exact EUI-64 memory address range for AT24MAC602-STUM-T?
The EUI-64 address in AT24MAC602-STUM-T is stored in read-only extended memory at hexadecimal addresses 98h through 9Fh (eight consecutive bytes), as confirmed in Section 7.2 and Table 7-2 of the Atmel-8807E datasheet. This location is fixed and independent of the standard 2K array, ensuring the full 256 × 8-bit user memory remains available for application use.
Can AT24MAC602-STUM-T be used as a drop-in replacement for AT24MAC402-STUM-T?
No, AT24MAC602-STUM-T is not a drop-in replacement for AT24MAC402-STUM-T because it stores a 64-bit EUI address instead of 48-bit, requiring different read protocol handling and memory offset calculations. While pinout and basic I²C commands match, applications relying on EUI-48 parsing or Encapsulated EUI-48 generation will require firmware updates to access the native EUI-64 value at 98h–9Fh.
How does hardware write protection interact with software write protection on AT24MAC602-STUM-T?
When the WP pin of AT24MAC602-STUM-T is driven high (VCC), hardware write protection overrides all software protection modes and inhibits all write operations to the entire memory array - including attempts to program or clear the reversible or permanent software write protect registers. Software protection remains active only when WP is low or floating, as detailed in Tables 11-3 and 11-4 of the datasheet.
Is the 128-bit serial number in AT24MAC602-STUM-T accessible via standard I²C reads?
Yes, the 128-bit serial number in AT24MAC602-STUM-T is readable via I²C using a dedicated device address prefix '1011' (Bh) followed by A2/A1/A0 bits and R/W = 1, as specified in Section 9 and Figure 9-1 of the datasheet. The serial number occupies addresses 80h–8Fh and is permanently write-protected - no command or voltage sequence can alter it after factory programming.
What is the maximum allowable SCL rise/fall time for AT24MAC602-STUM-T at 1.7V operation?
At 1.7V supply, the AT24MAC602-STUM-T specifies maximum SCL rise time (tR) and fall time (tF) of 0.3 μs and 300 ns respectively, per Table 6-3 in the Atmel-8807E datasheet. These values assume standard I²C bus capacitance ≤ 400 pF and require appropriate pull-up resistor selection (e.g., 10 kΩ for 1.7V) to meet timing under worst-case conditions.
AT24MAC602-STUM-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 550 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
AT24MAC602-STUM-T FAQ
1.How can I place an order for AT24MAC602-STUM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24MAC602-STUM-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT24MAC602-STUM-T reliable?
The price and inventory of AT24MAC602-STUM-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24MAC602-STUM-T is usually 5 days.
3.What payment methods are accepted for AT24MAC602-STUM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24MAC602-STUM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24MAC602-STUM-T?
AT24MAC602-STUM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24MAC602-STUM-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT24MAC602-STUM-T?
For technical support, including AT24MAC602-STUM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24MAC602-STUM-T requirements.
6.How does Aetrix verify that AT24MAC602-STUM-T is sourced from the original manufacturer or authorized distributors?
All AT24MAC602-STUM-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT24MAC602-STUM-T meets industry standards.
7.What is the process for return or replacement of AT24MAC602-STUM-T?
All AT24MAC602-STUM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24MAC602-STUM-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT24MAC602-STUM-T part is unused and in its original packaging.
Return procedure for AT24MAC602-STUM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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