My Inquiry
My Account
Microchip Technology 25AA02E48-I/SN
- Part No.:
- 25AA02E48-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
25AA02E48-I/SN.pdf
- Description:
- IC EEPROM 2KBIT SPI 10MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,592
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
25AA02E48-I/SN from Microchip Technology is a 2 Kbit SPI serial EEPROM with factory-programmed EUI-48™ node address, 1.8–5.5 V supply range, 16-byte page write capability, and industrial temperature support (−40°C to +85°C). It provides globally unique network identity for embedded Ethernet/Wi-Fi nodes and supports secure device identification in IoT edge sensors and industrial controllers.
For engineers reviewing the 25AA02E48-I/SN datasheet, 25AA02E48-I/SN pinout, 25AA02E48-I/SN application, or 25AA02E48-I/SN equivalent, this device delivers preprogrammed IEEE-compliant addressing, low-power SPI interface operation up to 10 MHz, hardware write protection via WP pin, and robust data retention (>200 years) - critical for firmware configuration storage and MAC address persistence in long-lifecycle deployments.
Technical Context
The 25AA02E48-I/SN implements a standard SPI Mode 0,0/Master-Slave interface with separate SI (data in), SO (data out), SCK (clock), CS (chip select), WP (write-protect), and HOLD (pause) signals. Its internal architecture includes an 8-bit instruction register, page latches, and high-voltage generator for EEPROM programming.
It uses self-timed erase/write cycles (≤5 ms), supports sequential read with automatic address wraparound, and enforces block write protection via BP0/BP1 bits in a nonvolatile STATUS register. The factory-set BP1=0/BP0=1 permanently protects the upper 1/4 array (0xC0–0xFF) containing the EUI-48™ address.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 × 8-bit (2 Kbit) EEPROM array; sufficient for MAC address + minimal configuration data |
| Interface | SPI-compatible serial bus (Mode 0,0); requires only CS, SCK, SI, SO - no I²C pull-ups or arbitration logic |
| Max Clock Frequency | 10 MHz at VCC ≥ 4.5 V; enables fast boot-time MAC fetch in microcontroller-based systems |
| Write Cycle Time | ≤5 ms per byte or page; deterministic timing simplifies host firmware polling or interrupt-driven completion handling |
| Endurance | 1,000,000 erase/write cycles; supports frequent calibration or logging updates over product lifetime |
| Data Retention | >200 years at +25°C; ensures MAC address integrity across decades without refresh |
| Supply Voltage | 1.8 V to 5.5 V; interoperable with 3.3 V and 5 V logic domains and battery-backed systems |
Pinout & Package
25AA02E48-I/SN is housed in an 8-lead SOIC (SN) package, 3.90 mm body width, RoHS-compliant, with gull-wing leads and standard JEDEC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable; deselects device and forces SO into high-impedance to share SPI bus with other peripherals |
| SO (Pin 2) | Serial Data Output | Tri-state output; shifts out read data on SCK falling edge; high-Z when CS high or HOLD active |
| WP (Pin 3) | Hardware Write-Protect | Low = blocks all writes to memory and STATUS register; independent of WEL latch state |
| VSS (Pin 4) | Ground Reference | Primary return path for all digital and internal HV programming currents |
| SI (Pin 5) | Serial Data Input | Latches instructions, addresses, and write data on SCK rising edge; MSb-first protocol |
| SCK (Pin 6) | Serial Clock Input | Synchronizes all SPI transactions; master-generated clock with defined rise/fall time limits (≤100 ns) |
| HOLD (Pin 7) | Communication Pause | Low = suspends ongoing SPI transfer without resetting internal state; resumes from same point on release |
| VCC (Pin 8) | Supply Voltage | 1.8–5.5 V power input; powers logic, EEPROM array, and internal charge pump for write operations |
Key Features
| Feature | Design Value |
|---|---|
| EUI-48™ Node Address | Factory-programmed, globally unique 48-bit MAC address stored at 0xFA–0xFF and permanently write-protected by default |
| Page Write Mode | Up to 16 bytes written per command within same 16-byte physical page - reduces SPI overhead vs. byte writes |
| Block Write Protection | Configurable via STATUS register (BP1/BP0) to protect none, 1/4, 1/2, or full array - enables flexible security partitioning |
| Power-On Write Safety | Write enable latch resets at power-up; prevents accidental writes during brown-out or reset sequences |
| HOLD Functionality | Pauses active SPI transfers mid-sequence without losing context - allows servicing higher-priority interrupts cleanly |
Applications
| Industrial Ethernet Node | Wi-Fi IoT Sensor |
|---|---|
Use Scenario: Embedded PLC controller requiring persistent, tamper-resistant MAC address for Modbus TCP communication. IC Role / Device Role / Timing Role: Stores IEEE EUI-48™ identifier used by Ethernet MAC layer during link initialization and DHCP negotiation. Use Value: Eliminates need for external MAC programming during manufacturing; factory-traceable identity ensures network uniqueness and simplifies fleet management. | Use Scenario: Battery-powered environmental sensor transmitting data via Wi-Fi Direct to gateway. IC Role / Device Role / Timing Role: Holds device-specific BSSID and credential binding keys alongside calibrated sensor offsets. Use Value: Enables secure, zero-touch provisioning using preassigned identity; 1 µA standby current extends battery life in sleep-mode deployments. |
| Medical Diagnostic Module | Automotive Telematics Unit |
Use Scenario: Portable ultrasound probe storing calibration coefficients and regulatory compliance metadata. IC Role / Device Role / Timing Role: Nonvolatile storage for FDA-mandated device ID, firmware version, and last-calibration timestamp. Use Value: Supports audit-ready traceability; >200-year data retention meets medical device lifecycle requirements without backup power. | Use Scenario: In-vehicle infotainment unit requiring unique CAN node ID and OTA update signature keys. IC Role / Device Role / Timing Role: Secure storage of EUI-48™-derived CANopen Node ID and cryptographic key material. Use Value: Hardware-level write protection (WP pin + STATUS register) prevents malicious or accidental overwrite during firmware updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 25AA02E64-I/SN | Factory-programmed EUI-64™ (8-byte) address instead of EUI-48™; identical pinout, timing, and electrical specs | Required for systems mandating native EUI-64™ (e.g., IPv6 autoconfiguration, Zigbee 3.0) | Select 25AA02E64-I/SN if EUI-64™ format is required without software encapsulation |
| AT25DF021-MAU-T | 2 Mbit SPI Flash (not EEPROM); no factory node address; supports sector erase but lacks EUI-48™/EUI-64™ | Used where larger code/data storage is needed, not MAC identity - requires external MAC generation logic | Choose only if memory size >2 Kbit is essential and node identity is managed in firmware or external hardware |
Compared with 25AA02E48-I/SN, 25AA02E64-I/SN offers direct EUI-64™ support without software conversion, while AT25DF021-MAU-T trades guaranteed unique identity for 1024× more capacity - making it unsuitable for MAC storage but viable for firmware overlay.
Availability
25AA02E48-I/SN is available at Aetrix Electronics and suitable for industrial Ethernet nodes, Wi-Fi IoT sensors, medical diagnostic modules, and automotive telematics units requiring stable component supply and long-term traceability.
Supply support for 25AA02E48-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 25AA02E48-I/SN belongs to Microchip's serial EEPROM product line designed specifically for secure, factory-programmed device identity in networked embedded systems - enabling plug-and-play connectivity without manual MAC assignment.
FAQ
What is the factory-programmed address format for the 25AA02E48-I/SN?
The 25AA02E48-I/SN contains a preprogrammed EUI-48™ node address stored in memory locations 0xFA through 0xFF. This 6-byte value consists of a 3-byte IEEE-assigned OUI followed by a 3-byte Microchip-generated extension, ensuring global uniqueness. The address is write-protected by default via BP1=0/BP0=1 in the STATUS register.
Can the 25AA02E48-I/SN operate at 1.8 V supply voltage?
Yes, the 25AA02E48-I/SN supports a full 1.8 V to 5.5 V supply range. At 1.8 V, its maximum SPI clock frequency is 3 MHz, and standby current remains ≤1 µA at +85°C. All DC and AC specifications in the datasheet are validated across this entire voltage range.
How does the HOLD pin function during an active SPI transaction?
The HOLD pin on the 25AA02E48-I/SN pauses ongoing SPI communication without resetting internal state. When pulled low while SCK is low, SI/SO/SCK are tri-stated and ignored until HOLD returns high - allowing the host microcontroller to service urgent interrupts and resume exactly where it left off.
Is the EUI-48™ address in the 25AA02E48-I/SN modifiable by the user?
The EUI-48™ address in the 25AA02E48-I/SN is stored in the upper 1/4 of the array (0xC0–0xFF), which is factory write-protected. To modify it, the user must first clear BP1/BP0 via WRSR, then perform a page write. However, doing so voids IEEE compliance and risks corrupting the globally unique identity - Microchip strongly advises against reprogramming this region.
What is the maximum write endurance specification for the 25AA02E48-I/SN?
The 25AA02E48-I/SN guarantees 1,000,000 erase/write cycles per memory location at 25°C and VCC = 5.5 V. Endurance scales with operating conditions; Microchip's Total Endurance™ Model provides application-specific estimates based on voltage, temperature, and pattern usage - available at microchip.com.
25AA02E48-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
25AA02E48-I/SN FAQ
1.How can I place an order for 25AA02E48-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 25AA02E48-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 25AA02E48-I/SN reliable?
The price and inventory of 25AA02E48-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 25AA02E48-I/SN is usually 5 days.
3.What payment methods are accepted for 25AA02E48-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25AA02E48-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25AA02E48-I/SN?
25AA02E48-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25AA02E48-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 25AA02E48-I/SN?
For technical support, including 25AA02E48-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25AA02E48-I/SN requirements.
6.How does Aetrix verify that 25AA02E48-I/SN is sourced from the original manufacturer or authorized distributors?
All 25AA02E48-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 25AA02E48-I/SN meets industry standards.
7.What is the process for return or replacement of 25AA02E48-I/SN?
All 25AA02E48-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 25AA02E48-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 25AA02E48-I/SN part is unused and in its original packaging.
Return procedure for 25AA02E48-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
25AA02E48-I/SN Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
