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Microchip Technology 24AA02T-I/SN
- Part No.:
- 24AA02T-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24AA02T-I/SN.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:252
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Product details
Overview
24AA02T-I/SN from Microchip Technology Inc. is a 2-Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory with hardware write-protection, 1.7V–5.5V operation, and industrial temperature range (–40°C to +85°C). It supports up to 400 kHz clock frequency, features 8-byte page write buffer, and delivers ≤1 µA standby current - used for secure device identification and configuration storage in embedded controllers.
For engineers reviewing the 24AA02T-I/SN datasheet, 24AA02T-I/SN pinout, 24AA02T-I/SN application, or 24AA02T-I/SN equivalent, key selection criteria include low-voltage I²C compatibility, factory-programmable MAC address capability, WP-pin-based hardware write protection, and SOIC-8 packaging for board-level integration in space-constrained industrial systems.
Technical Context
The 24AA02T-I/SN implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer enables current-address, random, and sequential read modes without external addressing logic.
It uses an on-chip HV generator for EEPROM programming, supports acknowledge polling to detect write-cycle completion, and enforces strict bus timing per I²C specification - including 600 ns minimum SCL high time and 1300 ns bus-free time at 2.5V–5.5V operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit), sufficient for storing IEEE EUI-48 MAC address plus user configuration data |
| Interface | I²C-compatible two-wire serial interface with 100/400 kHz support - compatible with standard microcontroller I²C peripherals |
| VCC Range | 1.7V to 5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V logic domains without level shifting |
| Write Endurance | 1,000,000 erase/write cycles - supports frequent firmware update logging or calibration data storage |
| Data Retention | >200 years at +85°C - ensures long-term reliability in unattended industrial deployments |
| Standby Current | ≤1 µA at I-temp - minimizes power draw in battery-backed or energy-harvesting systems |
| Page Write Time | ≤5 ms maximum - enables fast batch writes of up to 8 bytes without host timeout concerns |
Pinout & Package
24AA02T-I/SN is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package with 150 mil body width and gull-wing leads. Pin 1 is marked by a beveled corner or notch; the package is RoHS-compliant and rated for industrial temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input | No internal connection - may be left floating or tied to VSS/VCC without affecting operation |
| A1 | Address Input | No internal connection - unused in 24AA02 family; no impact on I²C address (fixed at 0x50) |
| A2 | Address Input | No internal connection - simplifies PCB layout by eliminating need for pull-up/down resistors |
| VSS | Ground | Reference return path for all internal circuitry and I/O signals |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up resistor (e.g., 10 kΩ @ 100 kHz) |
| SCL | Serial Clock Input | Input-only clock line synchronized to host controller; determines maximum data rate |
| WP | Write-Protect Control | Hardware-enforced lock: tied to VCC disables all writes while preserving read access |
| VCC | Power Supply | Single-supply input supporting 1.7V–5.5V - powers EEPROM array and interface logic |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Programmed EUI-48 Address | Unique 48-bit MAC address pre-programmed at wafer level - eliminates post-manufacture provisioning overhead |
| Hardware Write Protection | WP pin directly gates write enable logic - prevents accidental or malicious firmware corruption during field operation |
| Low-Voltage Operation | Functional down to 1.7V - enables use in brown-out conditions or with aging batteries in remote sensors |
| Noise-Resilient I²C Interface | Schmitt-trigger inputs + output slope control - maintains signal integrity on long traces or noisy industrial backplanes |
| Page Write Buffer | 8-byte internal latch - reduces I²C transaction count for multi-byte writes, improving bus efficiency and reducing host CPU load |
Applications
| Industrial Sensor Node ID Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing unique device identifiers and sensor calibration coefficients in battery-powered wireless temperature/humidity nodes. IC Role / Device Role / Timing Role: Nonvolatile configuration storage IC providing persistent EUI-48 MAC address and offset/gain parameters for ADC subsystems. Use Value: Eliminates need for external programming during assembly; enables plug-and-play deployment with zero-touch network onboarding. | Use Scenario: Retaining factory-calibrated gain/offset values and usage logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for critical safety-related calibration data accessed during power-up self-test. Use Value: WP pin ensures calibration data remains immutable after initial setup - meeting IEC 62304 software lifecycle requirements. |
| Smart Energy Meter Firmware Flags | Automotive Body Control Module Settings |
Use Scenario: Recording firmware revision flags, tariff zone settings, and metering event counters in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to metering SoC via I²C for infrequent but mission-critical parameter updates. Use Value: 1 µA standby current extends battery life in AMI endpoint backup power systems beyond 10 years. | Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive BCMs compliant with AEC-Q100 Grade 2. IC Role / Device Role / Timing Role: Automotive-qualified nonvolatile memory retaining user preferences across ignition cycles. Use Value: Industrial temperature rating (–40°C to +85°C) and AEC-Q100 qualification ensure reliable operation under hood and cabin thermal extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC02B-I/SN | Requires ≥2.5V VCC; max 400 kHz only above 2.5V; no factory MAC address | Lacks EUI-48 preprogramming - requires external provisioning for network identity | Select when cost sensitivity outweighs MAC address convenience and system operates strictly ≥2.5V |
| AT24C02D-SSHM-T | Same 2-Kbit capacity and SOIC-8 package; supports 1 MHz I²C; no factory MAC | Higher speed interface but no built-in device identity - increases firmware complexity for unique ID management | Choose for designs needing faster write throughput where MAC address is managed in MCU flash or external provisioning |
Compared with 24LC02B-I/SN and AT24C02D-SSHM-T, the 24AA02T-I/SN uniquely integrates factory-programmed EUI-48 addressing - reducing BOM count, eliminating post-silicon programming steps, and accelerating time-to-market for connected devices requiring standardized network identity.
Availability
24AA02T-I/SN is available at Aetrix Electronics and suitable for industrial sensor nodes, medical diagnostics equipment, smart energy meters, and automotive body control modules requiring stable component supply and long-term obsolescence planning.
Supply support for 24AA02T-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, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.
The 24AA02T-I/SN belongs to Microchip's 24XX02 EEPROM product line, designed specifically for secure, low-power device identification and configuration storage in resource-constrained embedded systems.
FAQ
What is the I²C address of the 24AA02T-I/SN?
The 24AA02T-I/SN has a fixed 7-bit I²C address of 0x50 (1010000b), with A0–A2 pins internally unconnected and ignored. This allows single-device I²C bus implementation without address conflicts, and is confirmed in Section 5.0 of the DS20001709N datasheet. The 24AA02T-I/SN does not support address pin remapping.
Does the 24AA02T-I/SN include a factory-programmed MAC address?
Yes, the 24AA02T-I/SN contains a globally unique, factory-programmed IEEE EUI-48 MAC address stored in its first six bytes (addresses 0xFA–0xFF). This feature is explicitly documented in Microchip's device marking and ordering information - distinguishing it from standard 24AA02 variants. The 24AA02T-I/SN leverages this for plug-and-play network identity.
How does hardware write protection work on the 24AA02T-I/SN?
The WP pin on the 24AA02T-I/SN provides hardware-level write inhibition: when tied to VCC, all write operations (byte and page) are blocked while read access remains fully functional. This behavior is electrically enforced within the silicon and requires no firmware intervention - making the 24AA02T-I/SN ideal for safeguarding calibration or identity data in deployed systems.
What is the maximum clock frequency supported by the 24AA02T-I/SN?
The 24AA02T-I/SN supports up to 400 kHz I²C clock frequency when VCC ≥ 2.5V, and 100 kHz when VCC is between 1.7V and 2.5V. This dual-speed capability is specified in Table "Device Selection" on page 1 of DS20001709N and ensures interoperability across mixed-voltage systems without protocol translation.
Is the 24AA02T-I/SN qualified for automotive applications?
No, the 24AA02T-I/SN carries the "I" (Industrial) temperature grade (–40°C to +85°C) and is not AEC-Q100 qualified. While functionally identical to AEC-Q100-qualified variants like the 24AA02E48T-I/SN, the 24AA02T-I/SN lacks the extended reliability testing required for automotive use. For automotive body electronics, select the E-grade or explicitly AEC-Q100-certified version of the 24AA02T-I/SN.
24AA02T-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:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24AA02T-I/SN FAQ
1.How can I place an order for 24AA02T-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA02T-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 24AA02T-I/SN reliable?
The price and inventory of 24AA02T-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 24AA02T-I/SN is usually 5 days.
3.What payment methods are accepted for 24AA02T-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA02T-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA02T-I/SN?
24AA02T-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA02T-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 24AA02T-I/SN?
For technical support, including 24AA02T-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA02T-I/SN requirements.
6.How does Aetrix verify that 24AA02T-I/SN is sourced from the original manufacturer or authorized distributors?
All 24AA02T-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 24AA02T-I/SN meets industry standards.
7.What is the process for return or replacement of 24AA02T-I/SN?
All 24AA02T-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24AA02T-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 24AA02T-I/SN part is unused and in its original packaging.
Return procedure for 24AA02T-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24AA02T-I/SN Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24CS02-SSHM-T
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