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Microchip Technology AT24C512BW-SH-T
- Part No.:
- AT24C512BW-SH-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT24C512BW-SH-T.pdf
- Description:
- IC EEPROM 512KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,178
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Product details
Overview
AT24C512BW-SH-T from Microchip Technology (formerly Atmel) is a 512 Kbit I²C-compatible serial EEPROM organized as 65,536 × 8 bits, operating from 1.8 V to 3.6 V, featuring 128-byte page write mode, hardware write protection via WP pin, and 1 MHz (at 2.5V/5.5V) or 400 kHz (at 1.8V) two-wire interface - deployed in industrial control modules for nonvolatile parameter storage.
For engineers reviewing the AT24C512BW-SH-T datasheet, AT24C512BW-SH-T pinout, AT24C512BW-SH-T application, or AT24C512BW-SH-T equivalent, key selection criteria include low-voltage operation (1.8–3.6 V), 128-byte page write capability, hardware write protect functionality, endurance of 1 million cycles, and compatibility with cascaded I²C bus systems supporting up to eight devices.
Technical Context
The AT24C512BW-SH-T implements a two-wire (I²C) serial interface with Schmitt-triggered, noise-filtered inputs and bidirectional open-drain SDA line. It uses three hardware address pins (A0–A2) to support up to eight devices on a shared bus and features an internal address counter that auto-increments during sequential reads.
Write operations are self-timed with a maximum 5 ms cycle time; page writes allow up to 128 bytes per transaction with wraparound addressing within the same 128-byte page. The device enters standby mode after STOP condition receipt and supports software reset via protocol-defined dummy clocking sequence.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288 bits (65,536 × 8), enabling storage of firmware configuration tables or calibration data in space-constrained embedded nodes. |
| Supply Voltage Range | 1.8 V to 3.6 V - supports direct interfacing with 1.8 V and 3.3 V microcontrollers without level-shifting. |
| I²C Clock Frequency | 400 kHz at 1.8 V; 1 MHz at ≥2.5 V - enables faster parameter updates in battery-powered or low-power wake-up sequences. |
| Page Write Capacity | 128 bytes per write cycle - reduces I²C transaction overhead when updating multi-byte settings like sensor offsets or network IDs. |
| Endurance & Retention | 1,000,000 write cycles and 40-year data retention - suitable for field-deployed equipment requiring long-term reliability without maintenance. |
| Write Protect Logic | Hardware-enabled via WP pin tied to VCC - prevents accidental overwrites during power transients or firmware glitches. |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation, automotive body control, and outdoor metering applications. |
Pinout & Package
AT24C512BW-SH-T is packaged in an 8-lead EIAJ SOIC (package code 8S2), 0.209" wide body, with standard gull-wing leads and NiPdAu lead finish. Pin 1 is marked by a notch or dot at the top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired to GND/VCC to select one of eight possible I²C addresses; floating pins default to logic low via internal pull-down. |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up resistor (10 kΩ typical); supports wire-OR with other I²C devices. |
| SCL | Serial Clock Input | Positive-edge clock input for data sampling; negative-edge clock output for data release; filtered for noise immunity. |
| WP | Write Protect Control | Active-high enable: tied to VCC blocks all writes; tied to GND enables normal operation; floating defaults to enabled. |
| VCC | Power Supply | 1.8–3.6 V supply input; decoupling capacitor (0.1 µF) recommended near pin for stable I²C timing. |
| GND | Ground Reference | System ground return path; must be connected before VCC to avoid latch-up during power-up sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | 1.8 V minimum supply enables integration into ultra-low-power IoT sensor nodes powered by coin cells or energy harvesters. |
| 128-byte page write mode | Reduces required I²C start/stop overhead by 99% vs. byte-wise writes when storing contiguous configuration blocks. |
| Hardware write protection | WP pin provides fail-safe, non-software-dependent memory lock - critical for safety-critical boot parameters or regulatory calibration data. |
| Noise-suppressed inputs | Schmitt triggers + input filtering eliminate false I²C starts/stops in electrically noisy industrial environments (e.g., motor drives). |
| Cascadable I²C address | Three address pins support up to eight identical AT24C512BW-SH-T devices on one bus - simplifies multi-sensor system BOMs. |
Applications
| Industrial PLC Configuration Storage | Smart Meter Firmware Parameter Backup |
|---|---|
|
Use Scenario: Storing user-configurable I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers subject to frequent reprogramming. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via I²C during PLC boot and runtime parameter updates. Use Value: Enables field reconfiguration without firmware reflashing; 1M-cycle endurance supports >10 years of daily commissioning cycles. |
Use Scenario: Preserving tariff schedules, billing counters, and cryptographic keys in utility smart meters exposed to temperature cycling and grid surges. IC Role / Device Role / Timing Role: Secure, write-protected memory block for tamper-resistant operational data synchronized with metrology ICs. Use Value: WP pin hardwiring prevents unauthorized parameter changes; 40-year retention ensures lifetime data integrity without battery backup. |
| Medical Device Calibration Data Archive | Automotive Body Control Module Settings |
|
Use Scenario: Archiving factory-calibrated sensor offsets (e.g., pressure, temperature) and diagnostic logs in portable ultrasound or infusion pumps. IC Role / Device Role / Timing Role: High-reliability data vault accessed during device power-up and service-mode diagnostics. Use Value: –40°C to +85°C rating ensures accuracy across clinical environments; 128-byte page writes accelerate calibration batch loading. |
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive BCMs updated via CAN-to-I²C gateways. IC Role / Device Role / Timing Role: Cascaded I²C slave on vehicle sub-bus, sharing bandwidth with other EEPROMs and sensors. Use Value: A0–A2 address flexibility allows identical AT24C512BW-SH-T parts across multiple BCM variants, reducing inventory SKUs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C512BN-SH-T | Same 512 Kbit capacity and 1.8 V operation, but in JEDEC SOIC (8S1) package - 0.150" body width vs. 0.209" for AT24C512BW-SH-T. | Preferred where PCB layout uses narrower SOIC footprints; not interchangeable without board revision due to different land patterns. | Select AT24C512BN-SH-T only if JEDEC SOIC footprint is already committed and thermal/mechanical constraints permit smaller body size. |
| M24C512-RMN6TP | STMicroelectronics 512 Kbit EEPROM with identical 1.8–5.5 V range and 400 kHz/1 MHz speeds, but uses different internal address mapping and lacks A2 pin. | Supports only four devices per I²C bus (A1/A0 only); requires firmware adaptation for address bit handling and WP behavior. | Choose M24C512-RMN6TP only when sourcing diversification is required and I²C address count is ≤4; verify WP pin logic matches system design. |
Compared with AT24C512BN-SH-T and M24C512-RMN6TP, the AT24C512BW-SH-T uniquely combines EIAJ SOIC mechanical compatibility, full three-bit addressing, and guaranteed 1.8 V operation - making it optimal for industrial designs requiring high device density and legacy footprint alignment.
Availability
AT24C512BW-SH-T is available at Aetrix Electronics and suitable for industrial PLCs, smart utility meters, medical calibration systems, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for AT24C512BW-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 product continuity, quality assurance, and long-term support for the AT24Cxx EEPROM family.
The AT24C512BW-SH-T belongs to Microchip's serial EEPROM product line, engineered for robust, low-power nonvolatile storage in harsh industrial and automotive environments where data integrity and supply chain stability are critical.
FAQ
What voltage range does the AT24C512BW-SH-T support?
The AT24C512BW-SH-T operates from 1.8 V to 3.6 V, optimized for low-power 1.8 V and 3.3 V systems. It is not rated for 5 V operation - using 5 V may damage the device. This voltage range ensures compatibility with modern microcontrollers and battery-powered edge devices while maintaining I²C timing compliance at 400 kHz.
How many devices can share the same I²C bus with AT24C512BW-SH-T?
Up to eight AT24C512BW-SH-T devices can share a single I²C bus using the A0, A1, and A2 address pins. Each pin can be hardwired to GND or VCC to configure a unique 3-bit device address. Floating address pins default to logic low, so explicit connection is required to avoid bus conflicts in multi-device systems.
What is the maximum write speed and page size for AT24C512BW-SH-T?
The AT24C512BW-SH-T supports 400 kHz I²C clocking at 1.8 V and 1 MHz at ≥2.5 V. Its page write size is fixed at 128 bytes, allowing efficient bulk updates. Each write cycle completes in ≤5 ms, and partial page writes (e.g., 1–127 bytes) are fully supported without alignment requirements.
Does AT24C512BW-SH-T include hardware write protection?
Yes, the AT24C512BW-SH-T includes a dedicated WP (Write Protect) pin. When WP is tied to VCC, all memory writes are inhibited - protecting critical calibration or security data from accidental overwrite. When WP is grounded, normal read/write operations proceed. Internal pull-down ensures safe default behavior if left unconnected.
What package type is used for AT24C512BW-SH-T?
AT24C512BW-SH-T uses an 8-lead EIAJ SOIC package (code 8S2), measuring 0.209" wide with gull-wing leads and NiPdAu surface finish. This package is mechanically distinct from JEDEC SOIC (8S1) and TSSOP (8A2), requiring specific PCB footprint and reflow profile validation prior to production use.
AT24C512BW-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:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 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
AT24C512BW-SH-T FAQ
1.How can I place an order for AT24C512BW-SH-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C512BW-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 AT24C512BW-SH-T reliable?
The price and inventory of AT24C512BW-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 AT24C512BW-SH-T is usually 5 days.
3.What payment methods are accepted for AT24C512BW-SH-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C512BW-SH-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C512BW-SH-T?
AT24C512BW-SH-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C512BW-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 AT24C512BW-SH-T?
For technical support, including AT24C512BW-SH-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C512BW-SH-T requirements.
6.How does Aetrix verify that AT24C512BW-SH-T is sourced from the original manufacturer or authorized distributors?
All AT24C512BW-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 AT24C512BW-SH-T meets industry standards.
7.What is the process for return or replacement of AT24C512BW-SH-T?
All AT24C512BW-SH-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C512BW-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 AT24C512BW-SH-T part is unused and in its original packaging.
Return procedure for AT24C512BW-SH-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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