24AA02E48-I/OT - 2Kb I2C EEPROM with EUI-48 MAC | Microchip
Артикул: 24AA02E48-I/OT ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $0.65 | $0,65 |
| 10 | $0.58 | $5,80 |
| 100 | $0.47 | $47,00 |
| 500 | $0.42 | $210,00 |
| 1.000 | $0.38 | $380,00 |
24AA02E48-I/OT Обзор
An EEPROM (Electrically Erasable Programmable Read-Only Memory) is a non-volatile memory that retains data without power and supports byte-level, in-circuit rewrites through a serial protocol. The 24AA02E48 belongs to the I2C EEPROM family -> serial EEPROM -> non-volatile memory -> memory IC -> semiconductor. It is a system-configuration memory used to store small amounts of critical data such as MAC addresses, calibration coefficients, and node identity that must survive power cycles.
Key features of the 24AA02E48-I/OT include the pre-programmed, read-only EUI-48 node identity (the globally unique 6-byte IEEE MAC address stored in the upper 128-byte block), a fixed I2C slave address (no A0/A1/A2 pins on the SOT-23 package), and page-write capability of up to 8 bytes per write cycle. The wide 1.7 V minimum supply enables direct interface to coin-cell-powered MCUs and 1.8 V SoCs without level shifting.
Architecturally, the 24AA02E48 uses Microchip's CMOS floating-gate cell array with an integrated I2C slave controller. The slave address is hard-wired (1010bxxx) with the three LSBs fixed for the SOT-23 version, and writes are protected by a software write-enable latch. ESD performance is rated at 4 kV HBM and 2 kV CDM, and the device is qualified to 1,000,000 erase/write cycles per page with greater than 200-year data retention.
Typical applications include storing the EUI-48 MAC address in Ethernet nodes, Zigbee/Thread/BLE radio modules, industrial sensor nodes, and any connected device that requires a unique IEEE 802 identity without an external EEPROM. It is also used for storing board configuration, manufacturing calibration data, and tamper-evident security keys.
When designing with the 24AA02E48-I/OT, ensure pull-up resistors on SCL and SDA (typically 4.7 kohm for 5 V and 10 kohm for 1.8 V) and respect the 30 ms maximum write cycle time. Because the upper memory block holds the pre-programmed EUI-48, do not write to addresses 0x80-0xFF unless your firmware intentionally overwrites the MAC (some host designs store a custom MAC in the lower block instead).
This page synthesizes distributor pricing, drop-in alternatives, and design notes not found in the manufacturer datasheet to accelerate EUI-48 node-identity integration.
Аналоги без доработки для 24AA02E48-I/OT — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с 24AA02E48-I/OT (тот же форм-фактор и посадочное место) — отличается по Memory Type, Package, Memory Organization, Memory Size, Data Retention.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
24AA02E48T-I/OT
✅ Прямая замена✓ В наличии
$0.27 / шт.
Открыть даташит →24AA02E48-I/OTG
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
24AA02E48T-I/OTG
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
24AA02E64T-I/OT
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
24AA02E48-I/OT Максимальные параметры и электрические характеристики
| Тип памяти | EEPROM - Serial (I2C) |
| Размер памяти | 2 Kbit (256 x 8) |
| Memory Organization | 2 blocks of 128 x 8-bit |
| Тип интерфейса | I2C (2-wire serial) |
| Clock Frequency (Max) | 400 kHz |
| Access Time (Max) | 900 ns |
| Supply Voltage (Min) | 1.7 V |
| Supply Voltage (Max) | 5.5 V |
| Active Read Current (Max) | 1 mA |
| Standby Current (Max) | 1 uA |
| Page Write Size | 8 bytes |
| Write Cycle Time (Max) | 5 ms |
| Endurance | 1,000,000 erase/write cycles per page |
| Data Retention | greater than 200 years |
| Pre-programmed Identity | EUI-48 MAC address (in upper block, 0x80-0xFF) |
| Рабочая температура | -40 C to +85 C (Industrial / I grade) |
| Корпус | SOT-23-5 (OT) |
| Тип монтажа | Surface Mount |
| Статус RoHS | Compliant |
Конфигурация выводов 24AA02E48-I/OT
| Контакт 1 | SDA — Serial data input/output (I2C bidirectional) |
| Контакт 2 | GND — Ground reference |
| Контакт 3 | NC — No internal connection on SOT-23-5 variant |
| Контакт 4 | WP — Write-protect input; tie to VCC for full read/write, to GND to protect upper block |
| Контакт 5 | SCL — Serial clock input (I2C) |
Типичное применение
24AA02E48-I/OT подходит для 6 применениеs: EUI-48 MAC Address Storage for Ethernet Nodes, Zigbee / Thread / Matter Radio Module Identity, Industrial Sensor Node Configuration Memory, Wi-Fi Module EUI-48 Backup Identity, Battery-Backed Medical and Wearable Device Identity, Automotive Aftermarket Diagnostic Dongle.
EUI-48 MAC Address Storage for Ethernet Nodes
The 24AA02E48-I/OT is purpose-built to provide a globally unique EUI-48 MAC address to IEEE 802.3 Ethernet controllers, Wi-Fi modules, and Bluetooth Classic radios that lack an internal identity. Its pre-programmed upper 128-byte block contains a factory-locked EUI-48 that the host firmware reads over I2C, eliminating the need for per-board programming stations and avoiding the risk of duplicate MACs in the field. The 1.7-5.5 V supply matches typical 1.8 V SoC rails directly, and the 1 uA standby draws negligible current from always-on power domains.
Рекомендуется
Zigbee / Thread / Matter Radio Module Identity
Zigbee 3.0, Thread, and Matter radio modules based on Silicon Labs EFR32 or Nordic nRF52840 often require an external EUI-64 (or EUI-48 translated to EUI-64) node identity to bootstrap the mesh network. The 24AA02E48-I/OT supplies this identity through its upper memory block over a 400 kHz I2C bus that the radio SoC drives directly. The 1 uA standby current keeps the device compatible with battery-backed IoT nodes that spend years in sleep, and the SOT-23-5 footprint fits beneath the radio shield.
Рекомендуется
Industrial Sensor Node Configuration Memory
Industrial 4-20 mA transmitters, Modbus RTU slaves, and CANopen I/O modules often need 256 bytes of non-volatile storage for calibration coefficients, sensor linearization tables, and Modbus node address. The 24AA02E48-I/OT stores this data plus its pre-programmed identity in a single 5-pin SOT-23, simplifying the BOM versus a separate generic EEPROM plus MAC chip. The -40 C to +85 C industrial temperature range covers most outdoor and factory-floor deployments, and the greater than 200-year retention guarantees the calibration survives decades of storage.
Рекомендуется
Wi-Fi Module EUI-48 Backup Identity
Many ESP32 and RTL8710 Wi-Fi modules ship with a factory-default MAC that the host may overwrite; the 24AA02E48-I/OT provides a backup or primary EUI-48 identity that survives firmware reflash and module replacement. Placed on the carrier PCB between the 3.3 V rail and the module's I2C pins with 4.7 kohm pull-ups, the EEPROM responds at slave address 0x50 and the upper block delivers the unique MAC in 6 sequential byte reads. The 1 mA active current is well within the Wi-Fi module's I2C bus drive capability.
Рекомендуется
Battery-Backed Medical and Wearable Device Identity
Wearable medical devices, hearing aids, and patient monitors often operate for years on a coin cell and must transmit a stable unique device identifier (UDI) for FDA and EU MDR compliance. The 24AA02E48-I/OT's 1 uA maximum standby current adds less than 0.1 % to the annual battery budget of a CR2032, and its pre-programmed EUI-48 provides the EUDAMED-compatible UDI without factory programming. The 1.7 V minimum supply lets the EEPROM stay accessible down to the brown-out threshold of most 1.8 V SoCs.
Рекомендуется
Automotive Aftermarket Diagnostic Dongle
OBD-II Bluetooth and CAN diagnostic dongles require a unique identity so that the paired phone app or cloud service can recognize the same physical device across re-pairings. The 24AA02E48-I/OT serves that role with its EUI-48 pre-programmed address, eliminating the need for per-unit programming during dongle assembly. While not AEC-Q100 qualified (Microchip offers automotive-grade siblings with /VAO suffixes), it is widely used in non-safety automotive aftermarket applications at -40 C to +85 C.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для 24AA02E48-I/OT — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | 24AA02E48T-I/OT | 24AA02E48-I/OTG | 24AA02E48T-I/OTG | 24AA02E64T-I/OT |
|---|---|---|---|---|---|
| Package | SOT-23-5 (OT) | SOT-23-5 (OT) - same | SOT-23-5 (OT) - same | SOT-23-5 (OT) - same | SOT-23-5 (OT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Memory Size | 2 Kbit (256 x 8) | 2 Kbit (256 x 8) | 2 Kbit (256 x 8) | 2 Kbit (256 x 8) | 2 Kbit (256 x 8) |
| Pre-programmed Identity | EUI-48 (6-byte) | EUI-48 (6-byte) | EUI-48 (6-byte) | EUI-48 (6-byte) | EUI-64 (8-byte) |
| Operating Voltage Range | 1.7 V to 5.5 V | 1.7 V to 5.5 V | 1.7 V to 5.5 V | 1.7 V to 5.5 V | 1.7 V to 5.5 V |
| Max Clock Frequency | 400 kHz | 400 kHz | 400 kHz | 400 kHz | 400 kHz |
| Page Write Size | 8 bytes | 8 bytes | 8 bytes | 8 bytes | 8 bytes |
| Operating Temperature Range | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Ключевые отличия
- Pre-programmed EUI-48 MAC address eliminates factory programming step (против Generic AT24C02 2-Kbit I2C EEPROM)
- Drop-in SOT-23-5 footprint across all 24AA02E48 variants (против 24AA025E48 (SOT-23-6 with A0/A1 chip-select pins))
- Wide 1.7 V minimum supply enables direct 1.8 V SoC connection (против Older 24LC02 (2.5 V minimum))
Заметки по проектированию
The 24AA02E48-I/OT draws a maximum of 1 uA in standby and 1 mA during active read at 400 kHz. At 3.3 V supply this is negligible compared to typical MCU sleep currents. However, during the 5 ms internal write cycle the device draws its active supply - decouple VCC with a 100 nF X7R ceramic placed within 3 mm of the VCC pin to prevent supply droop from injecting noise into the I2C bus during write completion.
Use 4.7 kohm I2C pull-up resistors to VCC for 5 V operation and 10 kohm for 1.8 V operation. Place pull-ups close to the MCU side of the bus to balance rise time against bus capacitance - the SOT-23-5 footprint adds minimal capacitance (~2 pF) so the bus is typically limited by the MCU pin and PCB trace. Keep SDA and SCL traces short and parallel, with a ground guard on long runs to limit radiated emissions.
The upper 128-byte block (addresses 0x80-0xFF) of the 24AA02E48 contains the factory-locked EUI-48 MAC address. Do not perform page writes that straddle the 0x7F/0x80 boundary - the I2C page write command will silently roll over within the page. To read the EUI-48, perform sequential byte reads starting at address 0xFA (last 6 bytes) without sending a stop bit between bytes. Tie WP (pin 4) to VCC to allow writes to the lower block for user data, or to GND to hardware-protect the entire memory if the MAC must be immutable.
Информация о соответствии
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - choose /VAO-suffixed automotive variants for AEC-Q100. Halogen-free green package available with G suffix (24AA02E48-I/OTG).
