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Microchip Technology AT24C1024BW-SH25-T
- Part No.:
- AT24C1024BW-SH25-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT24C1024BW-SH25-T.pdf
- Description:
- IC EEPROM 1MBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,865
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Product details
Overview
AT24C1024BW-SH25-T from Microchip Technology (formerly Atmel) is a 1 Mbit (131,072 × 8) two-wire serial EEPROM optimized for low-voltage industrial applications. It operates from 2.5V to 5.5V, supports 1 MHz clock rate at 5V/2.5V, features hardware write protection via WP pin, and uses 8-lead EIAJ SOIC package with NiPdAu lead finish.
For engineers reviewing the AT24C1024BW-SH25-T datasheet, AT24C1024BW-SH25-T pinout, AT24C1024BW-SH25-T application, or AT24C1024BW-SH25-T equivalent, this page delivers verified electrical specs, pin-level functional roles, real-world use cases in embedded systems, and validated alternative parts for supply continuity and design flexibility.
Technical Context
The AT24C1024BW-SH25-T implements a cascaded two-wire interface supporting up to four devices on a shared bus using A1/A2 address inputs. Its internal architecture includes a 17-bit address counter, 256-byte page buffer, and high-reliability EEPROM array with 1,000,000 write cycles per page and 40-year data retention.
It employs Schmitt-triggered, noise-filtered SDA/SCL inputs, open-drain bidirectional data transfer, and self-timed 5 ms typical write cycle. The device enters low-power standby mode after STOP condition or power-up, drawing only 2.0 µA at 2.5V and 6.0 µA at 5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,048,576 bits (131,072 × 8), enabling storage of firmware patches or calibration data in space-constrained nodes |
| Supply Voltage Range | 2.5V to 5.5V - compatible with legacy 3.3V/5V microcontroller I/O domains without level shifting |
| Max Clock Frequency | 1 MHz at 2.5V/5V - enables faster configuration loading than standard 400 kHz I²C EEPROMs |
| Page Write Capacity | 256-byte pages - reduces write transaction count by 256× vs byte-write, cutting system latency |
| Write Endurance | 1,000,000 cycles per page - supports frequent field updates in metering or logging applications |
| Data Retention | 40 years at +85°C - ensures long-term reliability in industrial control panels and outdoor equipment |
| Standby Current | 2.0 µA at 2.5V - minimizes quiescent power in battery-backed or energy-harvesting systems |
Pinout & Package
AT24C1024BW-SH25-T is housed in an 8-lead EIAJ SOIC package (package code 8S2), 0.209" body width, with NiPdAu lead finish for enhanced solderability and corrosion resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NC | No Connect | Unbonded die pad; must remain floating - no external connection or pull-up/pull-down |
| A1 | Device Address Input | Hardwired logic level sets bit-1 of 3-bit device address; enables multi-drop bus addressing up to 4 devices |
| A2 | Device Address Input | Hardwired logic level sets bit-2 of 3-bit device address; used with A1 for unique I²C slave addressing |
| GND | Ground Reference | Return path for VCC and all I/O; requires low-impedance PCB plane for noise immunity in mixed-signal systems |
| VCC | Power Supply | 2.5V–5.5V input; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin for stable operation |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes; floating defaults to GND via internal pull-down |
| SCL | Serial Clock Input | Positive-edge sampled clock; requires external pull-up; max 1 MHz frequency defines timing budget for host MCU |
| SDA | Serial Data I/O | Open-drain bidirectional line; shared across I²C bus; requires external pull-up and noise filtering per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Two-wire (I²C) interface | Fully compliant with Philips I²C protocol - enables direct integration with ARM Cortex-M, PIC, and ESP32 hosts without bridge ICs |
| 256-byte page write mode | Reduces firmware update time by >99% vs sequential byte writes - critical for OTA configuration rollouts |
| Schmitt-triggered, filtered inputs | Rejects >100 ns noise spikes on SDA/SCL - eliminates false START/STOP detection in electrically noisy factory environments |
| Hardware + software write protection | WP pin + internal lock bits allow layered security: WP blocks all writes; software locks protect specific memory regions |
| 17-bit addressing with page rollover | Supports seamless sequential reads across 131K-word boundary - simplifies bootloader and parameter table access logic |
Applications
| Industrial PLC Configuration Storage | Smart Meter Firmware Backup |
|---|---|
Use Scenario: Storing calibrated sensor offsets, I/O mapping tables, and runtime configuration in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via I²C during boot and runtime reconfiguration. Use Value: 40-year data retention ensures calibration integrity across PLC service life; 1 MHz interface accelerates commissioning setup. | Use Scenario: Holding encrypted firmware images and cryptographic keys in ANSI C12.22-compliant electricity meters operating in unattended outdoor substations. IC Role / Device Role / Timing Role: Secure boot image repository with hardware write protection preventing unauthorized firmware overwrite. Use Value: WP pin hardwired to VCC blocks field tampering; 1,000,000 write cycles support decades of secure firmware updates. |
| Medical Device Calibration Data | Automotive Body Control Module Settings |
Use Scenario: Archiving patient-specific calibration coefficients and usage logs in portable diagnostic equipment certified to IEC 62304 Class B. IC Role / Device Role / Timing Role: Tamper-evident parameter vault accessed during device power-up and maintenance mode. Use Value: NiPdAu finish ensures solder joint reliability under thermal cycling; 2.5V–5.5V range matches medical-grade power rails. | Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive BCMs operating across –40°C to +125°C ambient. IC Role / Device Role / Timing Role: Automotive-grade nonvolatile memory mapped into CAN gateway microcontroller's I²C peripheral. Use Value: Industrial temperature rating (–40°C to +85°C) and 1,000,000 endurance meet AEC-Q100 stress requirements for infotainment subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C1024BN-SH25-T | Same 1 Mbit capacity, 2.5V–5.5V, 1 MHz, but in JEDEC SOIC (8S1) package - 0.150" width vs 0.209" | Preferred where board space allows smaller footprint or existing JEDEC SOIC land pattern is fixed | Select when footprint compatibility with legacy Atmel SOIC designs is required; identical electrical behavior |
| M24M01-DFMN6TP | STMicroelectronics 1 Mbit EEPROM, 1.7V–5.5V, 1 MHz, TSSOP8 (8A2); no A1/A2 pins - fixed I²C address 0x50 | Suitable for single-device systems; lacks multi-drop addressing capability of AT24C1024BW-SH25-T | Choose when simplified address management is acceptable and TSSOP8 mechanical fit is preferred |
Compared with AT24C1024BN-SH25-T, the AT24C1024BW-SH25-T offers wider EIAJ SOIC body for improved thermal dissipation and mechanical stability; versus M24M01-DFMN6TP, it provides flexible multi-device bus addressing via A1/A2 but requires additional PCB routing for those pins.
Availability
AT24C1024BW-SH25-T is available at Aetrix Electronics and suitable for industrial PLCs, smart meters, medical diagnostics, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for AT24C1024BW-SH25-T 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 acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT24C series EEPROMs.
The AT24C1024B family was designed for robust, low-power nonvolatile storage in industrial and commercial systems where data integrity, long-term reliability, and I²C bus compatibility are mandatory.
FAQ
What is the operating voltage range for the AT24C1024BW-SH25-T?
The AT24C1024BW-SH25-T operates from 2.5V to 5.5V, making it compatible with both 3.3V and 5V microcontroller I/O domains. This dual-voltage capability eliminates the need for level shifters in mixed-voltage systems and supports legacy 5V industrial designs while maintaining low-power efficiency at 2.5V minimum.
Does the AT24C1024BW-SH25-T support multi-device I²C bus configurations?
Yes, the AT24C1024BW-SH25-T supports up to four devices on a single I²C bus using its A1 and A2 address input pins. These pins configure the two least-significant bits of the 7-bit slave address, enabling hardware-selectable addressing without external jumpers or configuration registers - a key advantage over fixed-address EEPROMs like the M24M01.
What is the maximum write speed and page size of the AT24C1024BW-SH25-T?
The AT24C1024BW-SH25-T supports a maximum clock frequency of 1 MHz at 2.5V/5V and implements 256-byte page writes. A full-page write completes in ≤5 ms, allowing up to 256 bytes to be programmed in a single I²C transaction - significantly reducing host MCU overhead compared to byte-wise writes.
How does hardware write protection work on the AT24C1024BW-SH25-T?
Hardware write protection on the AT24C1024BW-SH25-T is controlled by the WP pin: when tied to VCC, all write operations (byte, page, and erase) are inhibited. When grounded or left floating (internally pulled down), normal write functionality is enabled. This provides a fail-safe mechanism independent of firmware state - critical for preventing corruption during brown-out or reset conditions.
Is the AT24C1024BW-SH25-T qualified for automotive or extended temperature applications?
The AT24C1024BW-SH25-T is specified for industrial temperature range (–40°C to +85°C) and is not AEC-Q200 qualified. While widely used in automotive body control modules due to its robustness, formal automotive qualification requires validation per customer-specific stress testing; for safety-critical applications, consult Microchip's automotive-grade variants such as the AT24C1024B-MAH-T.
AT24C1024BW-SH25-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 550 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C1024BW-SH25-T FAQ
1.How can I place an order for AT24C1024BW-SH25-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C1024BW-SH25-T 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 AT24C1024BW-SH25-T reliable?
The price and inventory of AT24C1024BW-SH25-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C1024BW-SH25-T is usually 5 days.
3.What payment methods are accepted for AT24C1024BW-SH25-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C1024BW-SH25-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C1024BW-SH25-T?
AT24C1024BW-SH25-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C1024BW-SH25-T 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 AT24C1024BW-SH25-T?
For technical support, including AT24C1024BW-SH25-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C1024BW-SH25-T requirements.
6.How does Aetrix verify that AT24C1024BW-SH25-T is sourced from the original manufacturer or authorized distributors?
All AT24C1024BW-SH25-T 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 AT24C1024BW-SH25-T meets industry standards.
7.What is the process for return or replacement of AT24C1024BW-SH25-T?
All AT24C1024BW-SH25-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C1024BW-SH25-T, 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 AT24C1024BW-SH25-T part is unused and in its original packaging.
Return procedure for AT24C1024BW-SH25-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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