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AT24C1024BW-SH25-B
Microchip Technology
IC EEPROM 1MBIT I2C 1MHZ 8SOIC
3429 Pcs New Original In Stock
EEPROM Memory IC 1Mbit I2C 1 MHz 550 ns 8-SOIC
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5.0 / 5.0
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AT24C1024BW-SH25-B
Product Overview
1262033
DiGi Electronics Part Number
AT24C1024BW-SH25-B-DGManufacturer
Microchip Technology
AT24C1024BW-SH25-B
Description
IC EEPROM 1MBIT I2C 1MHZ 8SOICInventory
3429 Pcs New Original In Stock
EEPROM Memory IC 1Mbit I2C 1 MHz 550 ns 8-SOIC
Quantity
Minimum 1
Minimum 1
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AT24C1024BW-SH25-B Technical Specifications
Category
Memory, Memory
Packaging
-
Series
-
Product Status
Obsolete
DiGi-Electronics 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)
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.209", 5.30mm Width)
Supplier Device Package
8-SOIC
Base Product Number
AT24C1024
Datasheet & Documents
HTML Datasheet
AT24C1024BW-SH25-B-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.32.0051
Additional Information
Standard Package
95
Alternative Parts
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SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Fast shipping meant I could enjoy my purchase sooner than expected, thanks to their logistics efficiency.
de desembre 02, 2025
Great professionalism in customer support— they truly care about their clients' satisfaction.
de desembre 02, 2025
Their products are crafted with care, and their support backs that quality.
de desembre 02, 2025
Every delivery from DiGi Electronics arrives in pristine condition, thanks to their careful handling.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the AT24C1024BW-SH25-B in a temperature-varying industrial environment, and how can I ensure data integrity across its full -40°C to 85°C operating range?
When designing in the AT24C1024BW-SH25-B for industrial applications, the primary risk lies in I2C bus signal degradation and write cycle timing at temperature extremes. Although the device specifies 550 ns access time and 5ms max write cycle up to 85°C, PCB trace parasitics can increase signal rise/fall times near the limits, potentially causing I2C NACKs. To mitigate, use strong pull-ups (1.8kΩ–4.7kΩ depending on bus capacitance) with a local 0.1µF bypass capacitor, and enforce software timeouts that accommodate the full 5ms write cycle. Monitor VCC stability under load, as voltage droops during writes can corrupt data—even within the 2.5V to 5.5V range. Consider adding a watchdog timer or write status polling to confirm completion before powering down.
Can the AT24C1024BW-SH25-B safely replace a 24FC1025-I/SM in an existing design, and what I2C bus compatibility issues should I watch for?
Yes, the AT24C1024BW-SH25-B can generally replace the 24FC1025-I/SM since both are 1Mbit I2C EEPROMs with 1 MHz clock support and similar 8-SOIC packaging. However, a critical difference is that Microchip's 24FC1025 supports 2-byte addressing mode for full 128K x 8 access, while the AT24C1024BW-SH25-B relies solely on address pins A0–A2 for device selection. Ensure your controller firmware correctly manages the 512-byte page write limit and multiple device addressing to avoid overlapping writes. Also verify that the 5ms write cycle time is handled with polling or sufficient delay—Microchip models sometimes respond faster, creating timing bugs when switching to Atmel-derived parts like this.
How do I manage bus contention when integrating multiple AT24C1024BW-SH25-B devices on the same I2C bus, especially with limited address pin options?
The AT24C1024BW-SH25-B provides only three hardware address pins (A0–A2), limiting you to eight unique device addresses. When scaling beyond that, bus contention becomes a risk. To avoid collisions, assign unique addresses using pull-up/down resistors on A0–A2 and ensure strict arbitration in firmware. Use logic analysis during prototyping to verify SCL/SDA integrity under load. Additionally, stagger power-on sequences if multiple devices initialize simultaneously, as simultaneous wake-up can pull VCC down. For dense memory arrays, consider segmenting I2C buses using an I2C multiplexer like the TCA9548A to isolate AT24C1024BW-SH25-B clusters and reduce address conflicts.
Is the AT24C1024BW-SH25-B viable for long-term deployment given its 'Obsolete' status, and what are the recommended drop-in alternatives for future-proofing?
While the AT24C1024BW-SH25-B is marked as obsolete, it remains suitable for existing production runs with sufficient stock, but new designs should plan for obsolescence. Its RoHS3 compliance and MSL-1 rating support long-term reliability, but end-of-life supply chain risks are real. Recommended replacements include the AT24CM01-SHD-B (same footprint, improved endurance to 1M write cycles vs. 100K) and the 24AA1025-I/SM (Microchip, 1Mbit, but lower 400kHz speed). The CAT24M01XI-T2 offers comparable 1Mbit density and 1 MHz I2C but requires verification of block write protection behavior. Always revalidate write timing, address mapping, and software polling routines when migrating, as alternatives may differ in status register implementations.
What are the reliability implications of exceeding the specified write cycle endurance in the AT24C1024BW-SH25-B, and how can wear be minimized in data-logging applications?
The AT24C1024BW-SH25-B is rated for 100,000 write cycles per byte; exceeding this risks bit corruption or cell failure, especially in hot environments. In data-logging systems, this is a critical design constraint. To extend lifespan, implement wear leveling in firmware—even with no internal wear protection, you can rotate write locations across the 128K memory space. Minimize unnecessary writes by buffering data in RAM and flushing periodically. Use page writes efficiently to reduce write-cycle consumption. Additionally, leverage the device’s 550 ns read speed for frequent reads without penalty. For high-write applications, consider augmenting with FRAM (like CY15B104QSXI) or SPI flash with wear leveling to offload frequent updates from the AT24C1024BW-SH25-B.
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AT24C1024BW-SH25-B CAD Models
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