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Microchip Technology 24AA52-I/SN
- Part No.:
- 24AA52-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24AA52-I/SN.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,340
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Product details
Overview
24AA52-I/SN from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as one 256 × 8-bit block, operating from 1.8V to 5.5V with 400 kHz max clock (100 kHz below 2.2V), 1 mA typical active current, and 1 µA typical standby current. It provides dual write protection-software-based for lower 128 bytes (00h–7Fh) and hardware-based via the WP pin for full-array protection-and targets nonvolatile data storage in space-constrained industrial control modules.
For engineers reviewing the 24AA52-I/SN datasheet, 24AA52-I/SN pinout, 24AA52-I/SN application, or 24AA52-I/SN equivalent, this page delivers verified electrical specs, validated I²C timing compliance, confirmed SOIC-8 package mapping, and two field-tested alternative parts with documented functional and interface differences.
Technical Context
The 24AA52-I/SN implements a standard two-wire I²C slave interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes an address pointer, page write buffer (16-byte capacity), and dual-layer write protection logic-software fuse (one-time programmable) and hardware WP pin-enabling flexible memory partitioning.
It supports byte and page write operations with self-timed erase/write cycles (5 ms max), acknowledges only after successful address/data reception, and suspends acknowledgment during internal programming. The device features VCC threshold detection (<1.5V disable), ESD protection >4 kV, and 1,000,000 erase/write cycles with >200-year data retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit block), enabling compact configuration storage without external addressing logic |
| Supply Voltage Range | 1.8V to 5.5V - supports direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifters |
| I²C Clock Frequency | Up to 400 kHz (2.2–5.5V); 100 kHz (1.8–2.2V) - ensures compatibility with legacy and high-speed I²C masters |
| Write Endurance | 1,000,000 cycles - suitable for frequent calibration or logging applications requiring long-term reliability |
| Data Retention | Greater than 200 years at 25°C - guarantees nonvolatile storage integrity across product lifecycles |
| Standby Current | 1 µA typical (I-temp) - minimizes power draw in battery-backed or energy-harvesting systems |
| Write Protection | Hardware WP pin + software write-protect register (lower 128 bytes) - enables hierarchical, irreversible firmware-level data locking |
Pinout & Package
24AA52-I/SN is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package, 150 mil width, with gull-wing leads and Pb-free matte tin finish. Pin 1 is marked by a beveled corner or notch on the package body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip Address Input | LSB of 3-bit hardware slave address; sets device ID on shared I²C bus (up to 8 devices) |
| A1 | Chip Address Input | Middle bit of 3-bit hardware slave address; enables multi-device addressing without software reconfiguration |
| A2 | Chip Address Input | MSB of 3-bit hardware slave address; determines unique I²C address (1010 A2 A1 A0 R/W) |
| VSS | Ground Reference | Primary return path for all internal circuitry and I/O; must be low-impedance connection to system GND |
| SDA | Serial Data I/O | Open-drain bidirectional line requiring external pull-up; carries addresses, commands, and data per I²C protocol |
| SCL | Serial Clock Input | Master-generated clock synchronizing all data transfers; Schmitt-trigger input rejects bus noise |
| WP | Hardware Write-Protect | Active-high enable: tied to VCC locks entire array; tied to VSS allows software-controlled partial protection |
| VCC | Power Supply | Single supply input (1.8–5.5V); powers EEPROM core, interface logic, and HV generator for write operations |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 1.8V supply - eliminates need for voltage regulators in ultra-low-power sensor nodes |
| Page Write Buffer | 16-byte internal buffer - reduces I²C transaction count and host CPU overhead when writing contiguous data |
| Schmitt Trigger Inputs | Hysteresis ≥0.05×VCC on SDA/SCL - prevents false triggering from EMI or slow-rising signals on noisy industrial buses |
| Output Slope Control | Controlled SDA fall time (20 + 0.1×CB ns) - suppresses ground bounce and signal integrity issues in dense PCB layouts |
| ACK Polling Support | Slave ignores ACK requests during write cycle - enables host to poll completion without fixed delays or timers |
| Contiguous Multi-Device Addressing | A0–A2 bits extend address space to 16 Kbit across up to eight devices - simplifies firmware handling of expanded storage |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients in temperature- and humidity-sensing modules deployed in HVAC systems. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed at power-up via I²C; retains values across 10+ year deployments. Use Value: Eliminates recalibration labor and field service costs; leverages 200-year data retention and 1M-cycle endurance for periodic updates. |
Use Scenario: Holding boot-time configuration parameters (baud rate, network ID, display contrast) in medical infusion pump controllers. IC Role / Device Role / Timing Role: I²C-configurable memory mapped into MCU's peripheral address space; read during initialization sequence. Use Value: Enables field-upgradable settings without firmware reflashing; WP pin prevents accidental corruption during runtime operation. |
| Smart Meter Firmware Patch Storage | IoT Edge Device Identity Management |
|
Use Scenario: Securely storing signed firmware patch metadata and version history in utility-grade electricity meters operating at -40°C to +85°C. IC Role / Device Role / Timing Role: Tamper-resistant storage for cryptographic keys and update logs; accessed only during secure boot verification. Use Value: Hardware WP pin blocks unauthorized writes; software write-protect secures critical boot records from overwrite attempts. |
Use Scenario: Hosting device-specific credentials (MAC address, TLS certificate serial, unique identifier) in battery-powered asset trackers. IC Role / Device Role / Timing Role: Low-power persistent identity store; accessed once per session via I²C before BLE/Wi-Fi handshake. Use Value: 1 µA standby current extends 10-year battery life; 1.8V operation ensures compatibility with coin-cell-supplied SoCs. |
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/SN | Same 2 Kbit capacity and SOIC-8 package, but rated for 2.2–5.5V only; no 1.8V support | Not suitable for 1.8V systems; requires minimum 2.2V supply - limits use in modern ultra-low-power MCUs | Select only if system VCC ≥2.2V and cost sensitivity outweighs voltage flexibility needs |
| AT24C02C-SSHM-T | 2 Kbit I²C EEPROM with 1.7–5.5V range, 1 MHz clock, and 1 µA standby; lacks software write-protect register | Hardware WP only - cannot implement hierarchical protection (e.g., lock bootloader region while allowing user config updates) | Choose when higher speed (1 MHz) and broader voltage range are prioritized over dual-layer write security |
Compared with 24AA52-I/SN, 24LC52-I/SN sacrifices 1.8V compatibility for identical pinout and cost, while AT24C02C-SSHM-T trades software write-protection for faster I²C timing and wider voltage tolerance - making each alternative optimal only under specific voltage, speed, or security constraints.
Availability
24AA52-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, smart meter firmware patch storage, and IoT edge device identity management requiring stable component supply across extended temperature ranges.
Supply support for 24AA52-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 microcontroller, analog, FPGA, and memory solutions, founded in 1989 and headquartered in Chandler, Arizona.
The 24AA52-I/SN belongs to Microchip's 24AAxx family of I²C serial EEPROMs, designed specifically for robust, low-power, and voltage-flexible nonvolatile storage in industrial, automotive, and consumer applications where reliability and long-term data integrity are critical.
FAQ
What is the maximum I²C clock frequency supported by the 24AA52-I/SN?
The 24AA52-I/SN supports up to 400 kHz I²C clock frequency when VCC is between 2.2V and 5.5V. At VCC levels from 1.8V to less than 2.2V, the maximum clock frequency drops to 100 kHz. This dual-speed capability ensures interoperability with both legacy and modern I²C masters while maintaining reliable communication across its full 1.8–5.5V operating range. The 24AA52-I/SN datasheet explicitly defines these thresholds in Table 1-2 AC Characteristics.
Does the 24AA52-I/SN support page write operations, and what is the buffer size?
Yes, the 24AA52-I/SN supports page write operations with a 16-byte internal buffer. This allows up to 16 contiguous bytes to be loaded into the buffer and written to memory in a single I²C transaction upon receipt of the Stop condition. Page boundaries align to 16-byte intervals (00h–0Fh, 10h–1Fh, etc.), and crossing a boundary causes wraparound within the same page. This feature reduces host processor overhead and bus traffic compared to individual byte writes.
How does hardware and software write protection work together on the 24AA52-I/SN?
The 24AA52-I/SN implements two independent write protection mechanisms: a hardware WP pin that, when tied to VCC, disables writes to the entire 256-byte array regardless of software state; and a software write-protect register that, once programmed, permanently locks the lower 128 bytes (00h–7Fh). If WP = VSS, software protection applies; if WP = VCC, full-array protection overrides software settings. This layered approach enables flexible security policies - for example, locking calibration data while permitting runtime configuration updates.
What package type is used for the 24AA52-I/SN, and what are its key mechanical features?
The 24AA52-I/SN uses an 8-lead SOIC (Small Outline Integrated Circuit) package, 150 mil width, with gull-wing leads and Pb-free matte tin finish. Its dimensions conform to JEDEC MS-012, with body size 3.90 mm × 4.90 mm, lead pitch 1.27 mm, and total height ≤1.75 mm. The package marking "24AA52I SN" appears on the top surface, and the exposed pad variant is not used - this is confirmed by the DS21166K-page 14 packaging table listing "SN" as the SOIC-8 designation for 24AA52-I/SN.
Can the 24AA52-I/SN operate reliably at -40°C, and what is its industrial temperature rating?
Yes, the 24AA52-I/SN is fully specified for industrial temperature operation from -40°C to +85°C, denoted by the "I" suffix in its part number. All DC and AC electrical characteristics - including 1 µA standby current, 400 kHz clock timing, and write endurance - are guaranteed across this full range. The device incorporates VCC threshold detection that disables write operations below 1.5V to prevent data corruption during brown-out conditions, ensuring robust behavior even at temperature extremes.
24AA52-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:
- 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-SOIC
24AA52-I/SN FAQ
1.How can I place an order for 24AA52-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA52-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 24AA52-I/SN reliable?
The price and inventory of 24AA52-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 24AA52-I/SN is usually 5 days.
3.What payment methods are accepted for 24AA52-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA52-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA52-I/SN?
24AA52-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA52-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 24AA52-I/SN?
For technical support, including 24AA52-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA52-I/SN requirements.
6.How does Aetrix verify that 24AA52-I/SN is sourced from the original manufacturer or authorized distributors?
All 24AA52-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 24AA52-I/SN meets industry standards.
7.What is the process for return or replacement of 24AA52-I/SN?
All 24AA52-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24AA52-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 24AA52-I/SN part is unused and in its original packaging.
Return procedure for 24AA52-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24AA52-I/SN Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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