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Microchip Technology AT24C1024BW-SH-T
- Part No.:
- AT24C1024BW-SH-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT24C1024BW-SH-T.pdf
- Description:
- IC EEPROM 1MBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,356
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Product details
Overview
AT24C1024BW-SH-T from Microchip Technology (formerly Atmel) is a 1 Mbit (131,072 × 8) two-wire serial EEPROM with 1.8V operation (1.8V–3.6V), 400 kHz clock rate at 1.8V, hardware write protection via WP pin, and 256-byte page write capability. It supports cascading up to four devices on a shared I²C bus and is used in industrial control modules for nonvolatile parameter storage under low-power conditions.
For engineers reviewing the AT24C1024BW-SH-T datasheet, AT24C1024BW-SH-T pinout, AT24C1024BW-SH-T application, or AT24C1024BW-SH-T equivalent, key selection considerations include its 1.8V supply range, EIAJ SOIC-8 package (8S2), 1,000,000 write endurance per page, 40-year data retention, and support for random/sequential read and page write modes.
Technical Context
The AT24C1024BW-SH-T implements a standard two-wire (I²C-compatible) interface with Schmitt-triggered, noise-filtered inputs and open-drain SDA/SCL pins. It uses a 17-bit internal address counter and supports device addressing via A1/A2 pins-enabling up to four devices on one bus.
Its memory is organized into 512 pages of 256 bytes each. Write operations are self-timed (5 ms typical), and software reset is supported via a defined 9-clock-cycle protocol after bus interruption or power loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,048,576 bits (131,072 × 8), enabling storage of firmware calibration tables or device configuration data |
| Supply Voltage Range | 1.8V to 3.6V - compatible with modern ultra-low-power microcontrollers and battery-backed systems |
| Interface Speed | 400 kHz max at 1.8V - sufficient for parameter logging and infrequent configuration updates without timing margin risk |
| Write Endurance | 1,000,000 cycles per page - supports frequent recalibration or event logging in industrial sensors |
| Data Retention | 40 years at +85°C - ensures long-term reliability in unattended infrastructure monitoring equipment |
| Page Write Size | 256 bytes - allows efficient bulk writes while avoiding excessive write latency per transaction |
| Standby Current | 1.0 µA at 1.8V - minimizes quiescent power draw in always-on edge nodes |
Pinout & Package
AT24C1024BW-SH-T is supplied in an 8-lead EIAJ SOIC package (package code 8S2), 0.209" body width, with NiPdAu lead finish. Pin 1 is marked by a notch or dot; leads are gull-wing, surface-mount compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unused; must be left floating or tied to GND per layout guidelines - no electrical function |
| 2 (A1) | Device Address Input | Hardwired high/low or left floating (internally pulled down); selects one of four possible I²C addresses on shared bus |
| 3 (A2) | Device Address Input | Second address bit; used with A1 to configure unique 7-bit device address (0x50–0x53) for multi-device systems |
| 4 (GND) | Ground Reference | Return path for VCC and signal logic; requires low-impedance connection to system ground plane |
| 5 (VCC) | Power Supply | 1.8V–3.6V input; bypass capacitor (0.1 µF ceramic) required within 5 mm for stable I²C communication |
| 6 (WP) | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes; tied to GND enables full read/write access |
| 7 (SCL) | Serial Clock Input | Open-drain, Schmitt-triggered clock line; requires external pull-up (typically 2.2–10 kΩ to VCC) |
| 8 (SDA) | Serial Data I/O | Open-drain bidirectional data line; shares pull-up with SCL; supports ACK/NACK signaling per I²C protocol |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | 1.8V–3.6V supply range enables direct interfacing with 1.8V logic families and energy-harvesting systems |
| Hardware write protection | WP pin provides tamper-resistant, board-level locking of critical configuration data without firmware involvement |
| 256-byte page write mode | Reduces write transaction overhead by up to 255× vs. byte-write - accelerates firmware update or log buffer commits |
| Noise-suppressed inputs | Schmitt triggers + input filtering reject >100 ns glitches - improves robustness in electrically noisy industrial enclosures |
| Self-timed write cycle | 5 ms typical internal erase/write eliminates need for host polling delay - simplifies driver implementation |
| Cascadable architecture | A1/A2 inputs allow up to four AT24C1024BW-SH-T devices on one I²C bus - scales storage without additional buses |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and temperature compensation curves in a wireless pressure transducer. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during power-up and runtime correction routines via I²C. Use Value: Enables field-replaceable sensor heads with retained calibration; 40-year retention avoids recalibration during product lifetime. |
Use Scenario: Holding user-selected therapy parameters (e.g., infusion rate, alarm thresholds) in a portable insulin pump. IC Role / Device Role / Timing Role: Secure, low-power configuration memory updated infrequently but read at every session start. Use Value: WP pin prevents accidental overwrites during battery swaps; 1.8V operation extends battery life between charges. |
| Smart Meter Firmware Patch Storage | Automotive Body Control Module Settings |
Use Scenario: Caching small firmware patches or regulatory compliance updates in a utility smart meter deployed for 20+ years. IC Role / Device Role / Timing Role: Secondary boot memory holding validated delta updates applied during safe boot windows. Use Value: 1,000,000 write cycles support repeated field updates; page write mode reduces patch apply time below 100 ms. |
Use Scenario: Saving seat/mirror position presets and lighting profiles in a vehicle BCM after user customization. IC Role / Device Role / Timing Role: Persistent settings register mapped to I²C address space for fast read/write by MCU during wake-up. Use Value: EIAJ SOIC-8 (8S2) footprint fits tight PCB spaces; 1.8V compatibility aligns with automotive domain controller voltage rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C1024BN-SH-T | JEDEC SOIC-8 (8S1) package; same 1.8V operation, pinout, and timing | Requires PCB land pattern change (0.150" vs. 0.209" body width); identical functional behavior | Select when JEDEC SOIC footprint is already standardized in design and thermal/mechanical constraints permit |
| M24C102-RMN6TP | STMicroelectronics 1 Mbit EEPROM; 1.7V–5.5V supply; 1 MHz I²C at 5V; different A0/A1/A2 addressing scheme | Broader voltage range but lacks dedicated WP pin - write protection relies on software-only methods | Choose for designs needing wider supply flexibility or existing ST ecosystem integration, accepting trade-off in hardware-level data security |
Compared with AT24C1024BW-SH-T, AT24C1024BN-SH-T offers identical electrical performance in a narrower SOIC package, while M24C102-RMN6TP trades hardware write protection for extended voltage tolerance - impacting safety-critical configuration integrity.
Availability
AT24C1024BW-SH-T is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and smart meter firmware patch storage requiring stable component supply across extended product lifecycles.
Supply support for AT24C1024BW-SH-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, delivering high-reliability nonvolatile memory solutions since 1980.
The AT24C1024B family was designed for low-power, space-constrained embedded systems requiring robust, long-life data storage - especially in industrial automation, medical instrumentation, and energy metering where data integrity and supply stability are critical.
FAQ
What is the operating voltage range for AT24C1024BW-SH-T?
The AT24C1024BW-SH-T operates from 1.8V to 3.6V. This 1.8V variant is optimized for ultra-low-power systems and is not rated for 2.5V–5.5V operation - using it outside this range may cause functional failure or reduced reliability. Always verify VCC stability within ±5% during active I²C transactions.
Does AT24C1024BW-SH-T support I²C standard-mode or fast-mode speeds?
AT24C1024BW-SH-T supports standard-mode I²C at up to 400 kHz when powered at 1.8V. It does not support fast-mode (1 MHz) at 1.8V - that speed is only specified for 2.5V and higher variants like AT24C1024BW-SH25-T. Exceeding 400 kHz at 1.8V violates AC timing specs and risks communication errors.
How many devices can share the same I²C bus with AT24C1024BW-SH-T?
Up to four AT24C1024BW-SH-T devices can share one I²C bus using the A1 and A2 address pins. Each device must have a unique combination (00, 01, 10, or 11) hardwired to GND or VCC. Floating A1/A2 defaults to '00', so explicit termination is required for multi-drop configurations.
What is the purpose of the NC pin on AT24C1024BW-SH-T?
Pin 1 of AT24C1024BW-SH-T is marked NC (No Connect) and is internally unused. It must be left unconnected - tying it to any voltage rail or signal may cause unpredictable behavior. The EIAJ SOIC-8 package uses this pin position for mechanical symmetry but assigns no electrical function to it in this variant.
Can AT24C1024BW-SH-T retain data for 40 years at elevated temperatures?
Yes - the 40-year data retention rating for AT24C1024BW-SH-T is specified at +85°C ambient, verified per JEDEC standards. At lower temperatures (e.g., +25°C), retention exceeds 100 years. This makes it suitable for infrastructure equipment with 20+ year deployment horizons where field replacement is impractical.
AT24C1024BW-SH-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:
- Not 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:
- 1.8V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C1024BW-SH-T FAQ
1.How can I place an order for AT24C1024BW-SH-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C1024BW-SH-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-SH-T reliable?
The price and inventory of AT24C1024BW-SH-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-SH-T is usually 5 days.
3.What payment methods are accepted for AT24C1024BW-SH-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C1024BW-SH-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C1024BW-SH-T?
AT24C1024BW-SH-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C1024BW-SH-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-SH-T?
For technical support, including AT24C1024BW-SH-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C1024BW-SH-T requirements.
6.How does Aetrix verify that AT24C1024BW-SH-T is sourced from the original manufacturer or authorized distributors?
All AT24C1024BW-SH-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-SH-T meets industry standards.
7.What is the process for return or replacement of AT24C1024BW-SH-T?
All AT24C1024BW-SH-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C1024BW-SH-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-SH-T part is unused and in its original packaging.
Return procedure for AT24C1024BW-SH-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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