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Microchip Technology 24AA52T-I/MC
- Part No.:
- 24AA52T-I/MC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
24AA52T-I/MC.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,072
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Product details
Overview
24AA52T-I/MC from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory, operating from 1.8V to 5.5V with 400 kHz max clock frequency (100 kHz below 2.2V), 1 mA typical active current, and 1 µA typical standby current for industrial-temperature applications. It supports software write-protection of the lower 128 bytes and hardware write-protection via the WP pin.
For engineers reviewing the 24AA52T-I/MC datasheet, 24AA52T-I/MC pinout, 24AA52T-I/MC application, or 24AA52T-I/MC equivalent, key selection criteria include low-voltage operation down to 1.8V, dual-layer write protection (software + hardware), page-write capability (up to 16 bytes), Schmitt-trigger inputs for noise immunity, and compatibility with standard I²C bus timing across voltage ranges.
Technical Context
The 24AA52T-I/MC implements a true two-wire I²C slave interface with fixed 7-bit address format (1010xxxR/W), supporting byte and page write operations with auto-erase. Its internal address pointer enables current-address, random, and sequential read modes without external address latching.
Write protection is implemented at two levels: a one-time-programmable software fuse locking addresses 00h–7Fh, and a hardware WP pin that globally disables writes to the full 256-byte array when pulled high - independent of software state and overriding any prior fuse setting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit block), sufficient for firmware configuration, calibration data, or device ID storage in space-constrained systems. |
| Supply voltage range | 1.8V to 5.5V - enables direct interfacing with 1.8V, 2.5V, 3.3V, and 5V microcontrollers without level-shifting. |
| I²C clock frequency | Up to 400 kHz (≥2.2V); 100 kHz (1.8V ≤ VCC < 2.2V) - ensures interoperability with legacy and modern I²C masters across voltage domains. |
| Write endurance | 1,000,000 erase/write cycles - supports frequent field-updatable parameters in industrial logging or adaptive control systems. |
| Data retention | Greater than 200 years at 85°C - guarantees long-term reliability for unattended equipment and infrastructure deployments. |
| Standby current | Typical 1 µA at -40°C to +85°C - minimizes battery drain in always-on or energy-harvesting IoT endpoints. |
| ESD protection | >4,000V HBM - provides robust handling margin during board assembly and field service without additional protection circuitry. |
Pinout & Package
24AA52T-I/MC is packaged in an 8-lead TDFN (2 mm × 3 mm, 0.5 mm pitch) with exposed pad, rated for industrial temperature (-40°C to +85°C). The package supports automated optical inspection and offers low thermal resistance for stable operation in compact enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip address input | LSB of 3-bit hardware slave address; sets device address bit A0 when tied to VSS or VCC - enables up to eight devices on one I²C bus. |
| A1 | Chip address input | Mid-bit of 3-bit hardware slave address; determines unique I²C address alongside A0 and A2 for multi-device configurations. |
| A2 | Chip address input | MSB of 3-bit hardware slave address; completes 3-bit chip select code (A2,A1,A0) used in 7-bit slave address (1010xxx). |
| VSS | Ground reference | Primary return path for all internal logic and I/O; must be connected to system ground plane with low-impedance trace. |
| SDA | Serial data I/O | Open-drain bidirectional line requiring external pull-up resistor (2 kΩ for 400 kHz); carries address, command, and data during I²C transactions. |
| SCL | Serial clock input | Master-generated clock signal synchronizing all data transfers; Schmitt-trigger input ensures noise immunity on shared buses. |
| WP | Hardware write-protect input | Active-high enable for full-array write lock; when tied to VCC, prevents all writes regardless of software fuse state - critical for secure boot or factory calibration storage. |
| VCC | Power supply | Single 1.8–5.5V supply powering EEPROM core and I/O; internal voltage detector disables writes below ~1.5V to prevent corruption during brown-out. |
Key Features
| Feature | Design Value |
|---|---|
| Software write-protect register | One-time programmable fuse locking lower 128 bytes (00h–7Fh); prevents accidental overwrites of critical configuration while allowing upper half updates. |
| Hardware write-protect (WP pin) | Global write disable independent of software state; enables system-level protection enforced by hardware design - no firmware dependency. |
| Page write buffer (16 bytes) | Reduces I²C transaction overhead by batching up to 16 bytes per Stop condition; cuts bus time by ~80% vs. individual byte writes for contiguous data. |
| Schmitt-trigger inputs + slope control | Eliminates ground bounce and suppresses >50 ns noise spikes on SDA/SCL - removes need for external RC filters in electrically noisy environments. |
| ACK polling support | Allows master to detect write completion without fixed delay timers; improves bus utilization in real-time systems with variable EEPROM load conditions. |
Applications
| Industrial Sensor Calibration Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and temperature compensation tables in pressure or gas sensors deployed in harsh environments. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed at power-up and during periodic self-test; retains values across 200+ year lifetime without backup power. Use Value: Enables field-replaceable sensor modules with pre-loaded calibration - eliminates per-unit calibration labor and ensures traceable metrology compliance. | Use Scenario: Holding user-configurable therapy parameters (e.g., infusion rate limits, alarm thresholds) and device serial/lot traceability in portable insulin pumps or infusion controllers. IC Role / Device Role / Timing Role: Secure configuration vault with dual write protection - software lock guards regulatory-critical defaults, hardware WP prevents runtime tampering during clinical use. Use Value: Meets IEC 62304 safety requirements for configurable medical devices by enforcing immutable baseline settings and audit-ready change history. |
| Automotive Body Control Module (BCM) | Smart Energy Meter Firmware Settings |
Use Scenario: Storing seat/mirror position presets, lighting profiles, and door lock behavior in automotive BCMs operating across -40°C to +85°C ambient. IC Role / Device Role / Timing Role: Low-power EEPROM interfaced directly to 3.3V MCU I²C port; wakes only during user setup or power-cycle initialization. Use Value: Eliminates need for external voltage translators or charge pumps - reduces BOM cost and PCB area while meeting AEC-Q100 Grade 2 thermal requirements. | Use Scenario: Retaining tariff schedules, demand-response event logs, and meter firmware update flags in ANSI C12.22-compliant smart meters deployed in utility substations. IC Role / Device Role / Timing Role: Tamper-resistant configuration store with 1M endurance - withstands daily firmware patch cycles and decade-long deployment without wear-out. Use Value: Supports remote firmware updates and dynamic tariff switching without risk of parameter corruption during grid voltage sags or lightning-induced transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC52-I/MC | Same 2 Kbit capacity and pinout, but requires minimum 2.2V supply; lacks 1.8V operation capability. | Not suitable for 1.8V systems or mixed-voltage designs where VCC may dip below 2.2V during brown-out. | Select only if system operates strictly ≥2.2V and cost sensitivity outweighs low-voltage flexibility. |
| AT24C02C-SSHM-T | Pin-compatible 2 Kbit EEPROM with identical 1.8–5.5V range and 400 kHz speed, but uses different write-protect architecture (no software fuse; WP pin only). | Lacks permanent lower-half protection - unsuitable where immutable factory defaults are required. | Choose when simpler, single-layer write protection suffices and cross-manufacturer second sourcing is prioritized. |
Compared with 24LC52-I/MC and AT24C02C-SSHM-T, the 24AA52T-I/MC uniquely delivers guaranteed 1.8V operation plus dual-mode write protection - making it the only option for safety-critical, low-voltage, or field-upgradable systems requiring both hardware-enforced and one-time-programmable data integrity.
Availability
24AA52T-I/MC is available at Aetrix Electronics and suitable for industrial sensor calibration storage, medical device configuration memory, and automotive body control module applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature performance.
Supply support for 24AA52T-I/MC 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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design, manufacturing, and sales operations.
The 24AAxx family of serial EEPROMs was designed specifically for reliable, low-power nonvolatile data storage in resource-constrained embedded systems - emphasizing voltage flexibility, write endurance, and robust I²C interoperability.
FAQ
What is the minimum operating voltage for the 24AA52T-I/MC?
The 24AA52T-I/MC operates down to 1.8V across its full industrial temperature range (-40°C to +85°C). Below 2.2V, the maximum I²C clock frequency is reduced to 100 kHz to ensure reliable timing margins. This 1.8V capability allows direct integration with ultra-low-power microcontrollers and battery-powered systems without voltage translation.
How does the software write-protect feature work on the 24AA52T-I/MC?
The 24AA52T-I/MC software write-protect feature permanently locks the lower 128 bytes (addresses 00h–7Fh) by writing to a dedicated write-protect register using control code '0110'. Once set, this protection cannot be reversed through normal operation. The 24AA52T-I/MC acknowledges subsequent attempts to access this region but ignores write commands, preserving factory calibration or security keys.
Can the 24AA52T-I/MC be used with a 5V microcontroller I²C bus?
Yes, the 24AA52T-I/MC supports VCC from 1.8V to 5.5V and is fully compatible with 5V I²C buses. Its SDA and SCL inputs feature Schmitt-trigger thresholds and tolerate voltages up to VCC +1.0V, eliminating the need for external level shifters when interfacing with 5V MCUs - provided the pull-up resistors are connected to the same VCC rail as the 24AA52T-I/MC.
What is the purpose of the WP pin on the 24AA52T-I/MC?
The WP (Write-Protect) pin on the 24AA52T-I/MC provides hardware-level write inhibition: when tied to VCC, it disables all write operations to the entire 256-byte memory array - overriding both normal writes and software write-protect status. This enables system-level security for critical firmware or calibration data, independent of software state or potential firmware bugs.
Does the 24AA52T-I/MC support page write operations, and what is the page size?
Yes, the 24AA52T-I/MC supports page write operations with a 16-byte page buffer. Up to 16 bytes can be written in a single I²C transaction, significantly reducing bus overhead compared to byte writes. Page boundaries align to 16-byte intervals (e.g., 00h–0Fh, 10h–1Fh), and crossing a boundary causes wraparound within the same page - requiring firmware to manage alignment.
24AA52T-I/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- 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:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x3)
24AA52T-I/MC FAQ
1.How can I place an order for 24AA52T-I/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA52T-I/MC 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 24AA52T-I/MC reliable?
The price and inventory of 24AA52T-I/MC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA52T-I/MC is usually 5 days.
3.What payment methods are accepted for 24AA52T-I/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA52T-I/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA52T-I/MC?
24AA52T-I/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA52T-I/MC 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 24AA52T-I/MC?
For technical support, including 24AA52T-I/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA52T-I/MC requirements.
6.How does Aetrix verify that 24AA52T-I/MC is sourced from the original manufacturer or authorized distributors?
All 24AA52T-I/MC 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 24AA52T-I/MC meets industry standards.
7.What is the process for return or replacement of 24AA52T-I/MC?
All 24AA52T-I/MC units undergo pre-shipment inspection (PSI). If there is an issue with 24AA52T-I/MC, 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 24AA52T-I/MC part is unused and in its original packaging.
Return procedure for 24AA52T-I/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24AA52T-I/MC Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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