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Microchip Technology 25AA02E48T-I/SN
- Part No.:
- 25AA02E48T-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
25AA02E48T-I/SN.pdf
- Description:
- IC EEPROM 2KBIT SPI 10MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:21,902
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Product details
Overview
25AA02E48T-I/SN from Microchip Technology Inc. is a 2 Kbit SPI serial EEPROM with factory-programmed EUI-48™ node address, 256 × 8-bit organization, 16-byte page write capability, and industrial temperature range (−40°C to +85°C). It operates from 1.8V to 5.5V and supports up to 10 MHz clock frequency for embedded network identity storage in IoT edge nodes, industrial controllers, and networked sensors.
For engineers reviewing the 25AA02E48T-I/SN datasheet, 25AA02E48T-I/SN pinout, 25AA02E48T-I/SN application, or 25AA02E48T-I/SN equivalent, key selection criteria include guaranteed EUI-48™ uniqueness, SPI bus compatibility with microcontrollers (e.g., PIC®), hardware write protection via WP pin, and 1 µA standby current at 2.5V for low-power deployments.
Technical Context
The 25AA02E48T-I/SN implements a standard SPI Mode 0,0/Master-Slave interface with separate SI and SO lines, CS-controlled selection, and HOLD pin for interrupt-safe transaction suspension. Its internal architecture includes an 8-bit instruction register, page latches, and HV generator for EEPROM programming.
It features nonvolatile STATUS register bits (WIP, WEL, BP0/BP1) enabling real-time write-in-progress polling and configurable block protection of 0%, 25%, 50%, or 100% of memory - with factory-set BP1=0/BP0=1 protecting upper 1/4 (0xC0–0xFF) to preserve the preprogrammed EUI-48™ address stored at 0xFA–0xFF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 × 8-bit (2 Kbit); sufficient for MAC address + small configuration data without external memory expansion |
| Interface | SPI-compatible serial bus (Mode 0,0); requires only CS, SCK, SI, SO, WP, HOLD - no I²C pull-ups or level shifters needed |
| Max Clock Frequency | 10 MHz at VCC ≥ 4.5V; enables fast boot-time identity readout (<100 µs for full 256B sequential read) |
| Write Endurance | 1,000,000 erase/write cycles; supports firmware update logging or field calibration storage over 10+ years of daily writes |
| Data Retention | >200 years at +25°C; ensures permanent node identity persistence across product lifetime without refresh |
| Supply Voltage | 1.8V–5.5V operation; interoperable with both 3.3V and 5V microcontroller I/O domains without voltage translation |
| Standby Current | 1 µA at 2.5V and +85°C; minimizes quiescent power in battery-backed or energy-harvesting systems |
Pinout & Package
25AA02E48T-I/SN is packaged in an 8-lead SOIC (SN) with 3.90 mm body width, RoHS-compliant matte tin lead finish, and JEDEC-standard footprint (pitch = 1.27 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable: pulls device out of Standby mode; rising edge after write sequence initiates internal 5 ms write cycle |
| SO (Pin 2) | Serial Data Output | Tri-state open-drain output; transitions on falling SCK edge; high-impedance when CS high or HOLD low |
| WP (Pin 3) | Hardware Write-Protect | Low = blocks all array/STATUS writes regardless of WEL state; prevents accidental corruption during power transients |
| VSS (Pin 4) | Ground Reference | Primary return path for logic and programming currents; must be low-impedance to support 5 mA peak write current |
| SI (Pin 5) | Serial Data Input | Latches instruction/address/data on rising SCK edge; accepts MSb-first SPI frames per Table 2-1 |
| SCK (Pin 6) | Serial Clock Input | Synchronizes all SPI transactions; max 10 MHz rate defines minimum instruction latency (100 ns setup/hold) |
| HOLD (Pin 7) | Transaction Pause Control | Low while SCK is low suspends ongoing SPI transfer; resumes from same byte/bit position on next SCK edge |
| VCC (Pin 8) | Supply Voltage | 1.8V–5.5V input powering logic, EEPROM core, and HV generator; decoupling capacitor required near pin |
Key Features
| Feature | Design Value |
|---|---|
| EUI-48™ Node Address | Factory-programmed, globally unique 48-bit MAC address stored at 0xFA–0xFF and write-protected by default (BP1=0/BP0=1) |
| Page Write Mode | Up to 16 bytes written per 5 ms internal cycle; reduces host CPU overhead vs. byte-by-byte writes |
| Hardware Write Protection | Dedicated WP pin + STATUS register BP bits enable dual-layer protection against unintended writes |
| Hold Function | Pauses SPI communication mid-sequence without resetting address pointer - critical for servicing time-critical interrupts |
| Industrial Temp Range | Rated −40°C to +85°C; qualified for deployment in uncontrolled environments like factory floors or outdoor gateways |
Applications
| Industrial Network Node Identity | Secure Boot Configuration Storage |
|---|---|
Use Scenario: Assigning unique MAC addresses to programmable logic controllers (PLCs) deployed across distributed manufacturing lines. IC Role / Device Role / Timing Role: Nonvolatile identity source providing IEEE-compliant EUI-48™ address during Ethernet PHY initialization at power-on reset. Use Value: Eliminates manual MAC provisioning and avoids address conflicts in large-scale deployments using factory-guaranteed uniqueness. | Use Scenario: Storing cryptographic keys and bootloader validation parameters in medical infusion pumps requiring FDA-compliant traceability. IC Role / Device Role / Timing Role: Tamper-resistant configuration vault accessed early in boot sequence before main MCU firmware executes. Use Value: Hardware write-protection (WP pin + BP bits) prevents runtime corruption of security-critical values during field operation. |
| IoT Sensor Edge Device ID | Smart Energy Meter Calibration Data |
Use Scenario: Embedding unique identifiers into battery-powered environmental sensors operating in remote utility substations. IC Role / Device Role / Timing Role: Low-power identity storage accessed intermittently via SPI during wake-up cycles to report to LoRaWAN gateway. Use Value: 1 µA standby current at 2.5V extends 10-year battery life; EUI-48™ format ensures seamless integration with cloud identity registries. | Use Scenario: Recording factory-calibrated ADC offset/gain coefficients and meter serial number in ANSI C12.20-compliant electricity meters. IC Role / Device Role / Timing Role: High-reliability parameter store retaining values >200 years - exceeding product lifetime and regulatory audit requirements. Use Value: 1M endurance cycles support field recalibration events over decades without wear-out risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM with node identity applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 25AA02E64T-I/SN | Preprogrammed EUI-64™ (8-byte) instead of EUI-48™; identical pinout, timing, and electrical specs | Required for systems mandatorily using IEEE EUI-64™ addressing (e.g., IPv6 autoconfiguration) without software encapsulation | Select when native 64-bit node identity is required; no hardware changes needed |
| AT25DF021-SSH-T | 2 Mbit SPI DataFlash with sector erase; no factory node address; supports dual/quad I/O modes | Used for firmware storage or logging - not identity; lacks EUI preprogramming and hardware WP pin | Choose only if higher density or faster sequential reads are prioritized over guaranteed unique identity |
Compared with 25AA02E64T-I/SN, the 25AA02E48T-I/SN delivers EUI-48™ compatibility essential for legacy MAC-based networks, while AT25DF021-SSH-T trades identity assurance for capacity and speed - making it unsuitable for node identity but viable for bulk data storage where uniqueness is managed externally.
Availability
25AA02E48T-I/SN is available at Aetrix Electronics and suitable for industrial automation, IoT sensor nodes, and smart metering applications requiring stable component supply, long-term lifecycle support, and guaranteed EUI-48™ uniqueness.
Supply support for 25AA02E48T-I/SN 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 Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 25AA02E48T-I/SN belongs to Microchip's serial EEPROM product line designed specifically for secure, low-power, factory-assigned node identity storage in networked embedded systems.
FAQ
What is the factory-programmed node address format for 25AA02E48T-I/SN?
The 25AA02E48T-I/SN contains a factory-programmed EUI-48™ node address stored in memory locations 0xFA through 0xFF. This 6-byte value consists of a 3-byte IEEE-assigned OUI (Organizationally Unique Identifier) followed by a 3-byte Microchip-generated Extension Identifier, ensuring global uniqueness. The address is write-protected by default via STATUS register bits BP1=0 and BP0=1, locking the upper 1/4 of the array (0xC0–0xFF).
Does 25AA02E48T-I/SN support SPI Mode 1,1 or only Mode 0,0?
The 25AA02E48T-I/SN supports SPI Mode 0,0 only - meaning CPOL = 0 (clock idle low) and CPHA = 0 (data sampled on first clock edge). This is confirmed by Figure 1-2 and Figure 1-3 in DS20002123G, which define serial input/output timing relative to SCK rising/falling edges. Attempting Mode 1,1 will result in misaligned data sampling and communication failure.
How does the HOLD pin function during an active SPI transaction in 25AA02E48T-I/SN?
The HOLD pin in 25AA02E48T-I/SN suspends SPI communication mid-sequence when pulled low while SCK is low. During HOLD, SI, SCK, and SO enter high-impedance states and all input transitions are ignored except CS. The internal address pointer and instruction state are preserved. Resuming requires bringing HOLD high while SCK remains low - then communication continues from the exact bit position where it paused, as verified in Figure 1-1 and Section 2.1 of the datasheet.
Can the preprogrammed EUI-48™ address in 25AA02E48T-I/SN be overwritten?
Yes, the EUI-48™ address in 25AA02E48T-I/SN can be overwritten, but only after disabling factory write protection. This requires issuing a WRSR instruction to clear BP1 and BP0 bits (setting them to 00), which unlocks the upper 1/4 of memory (0xC0–0xFF). However, doing so removes hardware-enforced protection of the node address - Microchip explicitly warns that care must be taken to avoid accidental overwrites, as the address is not recoverable once erased.
What is the maximum write current specification for 25AA02E48T-I/SN at 5.5V?
The maximum write current for 25AA02E48T-I/SN is 5 mA at VCC = 5.5V, as specified in the "Features" section and Table 1-1 (D11 ICCWRITE). This peak current occurs during the internal 5 ms write cycle and must be supported by the local power supply and decoupling network. At lower voltages (e.g., 2.5V), the write current drops to 3 mA, easing design constraints in low-voltage systems.
25AA02E48T-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- SPI
- Clock Frequency:
- 10 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
25AA02E48T-I/SN FAQ
1.How can I place an order for 25AA02E48T-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 25AA02E48T-I/SN 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 25AA02E48T-I/SN reliable?
The price and inventory of 25AA02E48T-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25AA02E48T-I/SN is usually 5 days.
3.What payment methods are accepted for 25AA02E48T-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25AA02E48T-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25AA02E48T-I/SN?
25AA02E48T-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25AA02E48T-I/SN 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 25AA02E48T-I/SN?
For technical support, including 25AA02E48T-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25AA02E48T-I/SN requirements.
6.How does Aetrix verify that 25AA02E48T-I/SN is sourced from the original manufacturer or authorized distributors?
All 25AA02E48T-I/SN 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 25AA02E48T-I/SN meets industry standards.
7.What is the process for return or replacement of 25AA02E48T-I/SN?
All 25AA02E48T-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 25AA02E48T-I/SN, 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 25AA02E48T-I/SN part is unused and in its original packaging.
Return procedure for 25AA02E48T-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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