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Microchip Technology 24AA02T/SN
- Part No.:
- 24AA02T/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24AA02T/SN.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,679
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Product details
Overview
24AA02T/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, 400 kHz max clock frequency (100 kHz below 2.5V), and industrial temperature range (–40°C to +85°C). It supports page writes up to 8 bytes and delivers ≤1 µA standby current for low-power embedded systems requiring persistent device identification or configuration storage.
For engineers reviewing the 24AA02T/SN datasheet, 24AA02T/SN pinout, 24AA02T/SN application, or 24AA02T/SN equivalent, this page provides verified electrical specs, package mapping to SOIC-8 (SN), I²C timing constraints at 1.7V–5.5V, endurance (1M cycles), data retention (>200 years), and real-world use cases in secure boot, MAC address storage, and calibration data retention.
Technical Context
The 24AA02T/SN implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes an 8-byte page write buffer, self-timed erase/write cycle, and dedicated write-protect logic tied to the WP pin - enabling full-array protection when pulled high.
It uses a fixed 4-bit device address (1010b) with three "don't care" bits, resulting in a single I²C client address (0xA0 for write, 0xA1 for read). Address pointer auto-increment enables sequential reads across the full 256-byte memory space without reissuing the word address.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit), sufficient for storing MAC addresses, calibration coefficients, or secure keys in compact embedded nodes. |
| VCC Range | 1.7V–5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifting. |
| Max Clock Frequency | 400 kHz (≥2.5V), 100 kHz (<2.5V) - defines maximum I²C bus throughput and compatible controller timing budgets. |
| Write Cycle Time | 5 ms max (byte or page) - determines minimum delay between write commands and impacts firmware polling strategy. |
| Endurance | 1,000,000 erase/write cycles - supports frequent field updates (e.g., logging counters, runtime config) over product lifetime. |
| Data Retention | >200 years at 85°C - ensures long-term reliability of stored identifiers or calibration data in unpowered storage. |
| Standby Current | 1 µA max (I-temp.) - critical for battery-powered devices where quiescent power dominates system budget. |
Pinout & Package
24AA02T/SN is supplied in an 8-lead SOIC package (SN suffix), with 1.27 mm pitch, 3.9 mm body width, and JEDEC MS-012AC standard footprint. Pin 1 is marked by a beveled corner or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Accepts 1.7V–5.5V; decoupling capacitor (0.1 µF) required near pin for noise immunity during write cycles. |
| WP | Hardware write-protect input | Tie to VSS for full read/write access; tie to VCC to disable all writes (0x00–0xFF protected). |
| SCL | Serial clock input | Open-drain compatible; requires external pull-up (2 kΩ typical for 400 kHz); synchronizes all I²C transfers. |
| SDA | Serial data I/O | Open-drain bidirectional line; requires same pull-up as SCL; carries address, data, and ACK/NACK signals. |
| VSS | Ground reference | Must be connected to system ground plane; serves as return path for all internal logic and I/O currents. |
| A0–A2 | No-connect pins | Internally unconnected; may be left floating or tied to VSS/VCC with no functional impact. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation down to 1.7V | Enables direct integration into 1.8V IoT sensor nodes and energy-harvesting systems without voltage translation. |
| Hardware write-protection via WP pin | Prevents accidental or malicious firmware corruption of critical data (e.g., MAC, security keys) without software overhead. |
| Schmitt-trigger inputs and slope control | Rejects bus noise up to 50 ns spikes and eliminates ground bounce, ensuring reliable I²C communication in noisy industrial environments. |
| 8-byte page write buffer | Reduces I²C transaction count by up to 8× versus byte-write mode, improving firmware efficiency and bus utilization. |
| ESD protection >4 kV | Meets IEC 61000-4-2 Level 2 requirements, reducing need for external TVS diodes in end-equipment ESD design. |
Applications
| Secure Device Identity Storage | Industrial Sensor Calibration |
|---|---|
|
Use Scenario: Storing factory-programmed IEEE EUI-48 MAC address and cryptographic keys in networked edge devices. IC Role / Device Role / Timing Role: Nonvolatile memory holding immutable identity data accessed once at boot via I²C before network stack initialization. Use Value: Eliminates need for external key provisioning; leverages hardware WP to prevent runtime overwrite of identity-critical fields. |
Use Scenario: Saving temperature-compensated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Persistent storage for calibration parameters updated only during factory test or field recalibration via host MCU. Use Value: Enables one-time or infrequent writes with guaranteed 200-year data retention, avoiding flash wear-out in MCU internal memory. |
| Embedded Boot Configuration | Medical Device Settings Retention |
|
Use Scenario: Holding boot-mode selection flags (e.g., safe mode vs. normal mode) and firmware version metadata in diagnostic instruments. IC Role / Device Role / Timing Role: Read-on-reset memory providing configuration context to bootloader before main application execution. Use Value: Supports fail-safe recovery paths using 1 µA standby current to preserve settings during extended power-loss events. |
Use Scenario: Retaining user-adjusted therapy parameters (e.g., infusion rate, alarm thresholds) across power cycles in portable infusion pumps. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile storage compliant with IEC 62304 safety requirements for Class B medical software. Use Value: Meets >200-year data retention and 1M-cycle endurance for lifetime device usage without data loss risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC02B/SN | Requires ≥2.5V VCC; same 400 kHz speed and SOIC-8 package; no 1.7V support. | Not suitable for 1.8V systems; otherwise identical functionality and pinout. | Select 24LC02B/SN only if system VCC is guaranteed ≥2.5V and 1.7V operation is unnecessary. |
| AT24C02C-SSHM-T | Same 2-Kbit size and I²C interface; 1.7V–5.5V range; but rated for -40°C to +105°C (not AEC-Q100 or extended temp). | Lacks automotive qualification and 125°C extended temp option; different write-cycle timing (max 5 ms same, but typical 3 ms). | Choose AT24C02C-SSHM-T for cost-sensitive industrial designs where AEC-Q100 is not required and 105°C suffices. |
Compared with 24AA02T/SN, 24LC02B/SN excludes 1.7V–2.49V operation and lacks automotive qualification, while AT24C02C-SSHM-T omits AEC-Q100 compliance and extended temperature support - making 24AA02T/SN the only option qualified for automotive-grade 1.7V–5.5V I²C EEPROM use.
Availability
24AA02T/SN is available at Aetrix Electronics and suitable for automotive telematics modules, industrial PLCs, and medical infusion pumps requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant nonvolatile memory.
Supply support for 24AA02T/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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory solutions, with global manufacturing and quality certifications including ISO/TS 16949 and AEC-Q200.
The 24AA02 family is designed specifically for secure, low-power, automotive-qualified device identity and configuration storage - integrating factory-programmable memory with hardware write protection in miniature packages.
FAQ
What is the operating voltage range of the 24AA02T/SN?
The 24AA02T/SN operates from 1.7V to 5.5V, supporting direct interface with 1.8V, 3.3V, and 5V logic families. At voltages below 2.5V, its maximum I²C clock frequency is reduced to 100 kHz to ensure timing margin - a key constraint for low-voltage battery-powered designs using the 24AA02T/SN.
Does the 24AA02T/SN support page writes, and what is the buffer size?
Yes, the 24AA02T/SN supports page writes with an 8-byte internal buffer. This allows up to eight consecutive bytes to be written in a single I²C transaction, significantly reducing bus overhead compared to byte-wise writes. Page boundaries align to 8-byte offsets (0x00–0x07, 0x08–0x0F, etc.), and crossing boundaries causes wraparound within the same page.
How is write protection implemented on the 24AA02T/SN?
Write protection on the 24AA02T/SN is controlled by the WP pin: when tied to VCC, the entire 256-byte memory array (0x00–0xFF) is write-inhibited while reads remain fully functional; when tied to VSS, normal read/write operation is enabled. No software command or register setting is required - protection is purely hardware-based and active immediately.
Is the 24AA02T/SN AEC-Q100 qualified, and for which grade?
Yes, the 24AA02T/SN is AEC-Q100 qualified for Grade 2 (–40°C to +105°C) and Grade 3 (–40°C to +125°C) operation. Its qualification covers stress testing for temperature cycling, humidity bias, and ESD - confirming suitability for under-hood automotive applications where the 24AA02T/SN stores critical calibration or identification data.
What package type does the 'SN' suffix indicate for the 24AA02T/SN?
The 'SN' suffix denotes an 8-lead SOIC (Small Outline Integrated Circuit) package per JEDEC MS-012AC standard: 3.9 mm body width, 1.27 mm lead pitch, and gull-wing leads. This surface-mount package is widely supported by automated assembly lines and offers robust thermal and mechanical performance for industrial and automotive PCB layouts using the 24AA02T/SN.
24AA02T/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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24AA02T/SN FAQ
1.How can I place an order for 24AA02T/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA02T/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/SN reliable?
The price and inventory of 24AA02T/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/SN is usually 5 days.
3.What payment methods are accepted for 24AA02T/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA02T/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA02T/SN?
24AA02T/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA02T/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/SN?
For technical support, including 24AA02T/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA02T/SN requirements.
6.How does Aetrix verify that 24AA02T/SN is sourced from the original manufacturer or authorized distributors?
All 24AA02T/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/SN meets industry standards.
7.What is the process for return or replacement of 24AA02T/SN?
All 24AA02T/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24AA02T/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/SN part is unused and in its original packaging.
Return procedure for 24AA02T/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24AA02T/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
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