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Microchip Technology AT24C512BN-SH-T
- Part No.:
- AT24C512BN-SH-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C512BN-SH-T.pdf
- Description:
- IC EEPROM 512KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,486
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Product details
Overview
AT24C512BN-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) interface speed. It is used in industrial control modules for nonvolatile parameter storage with high endurance.
For engineers reviewing the AT24C512BN-SH-T datasheet, AT24C512BN-SH-T pinout, AT24C512BN-SH-T application, or AT24C512BN-SH-T equivalent, key selection criteria include low-voltage operation (1.8–3.6 V), cascading support for up to eight devices on one bus, 1,000,000 write cycles, 40-year data retention, and JEDEC SOIC-8 (8S1) package compatibility with NiPdAu lead finish.
Technical Context
The AT24C512BN-SH-T implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and supports standard-mode (400 kHz) and fast-mode (1 MHz) clocking depending on VCC. Its internal address counter enables current-address, random-address, and sequential read operations.
It uses three hardwired device address pins (A0–A2) to support up to eight devices on a shared bus, and includes a dedicated Write Protect (WP) pin that disables all writes when pulled high. The device features self-timed 5 ms max write cycles and acknowledge polling for host synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288 bits (65,536 × 8), enabling storage of firmware calibration tables or configuration profiles in space-constrained systems. |
| Supply Voltage Range | 1.8 V to 3.6 V - compatible with modern ultra-low-power microcontrollers and battery-backed systems. |
| Interface Speed | 400 kHz at 1.8 V; 1 MHz at ≥2.5 V - supports faster programming in higher-VCC environments without protocol changes. |
| Write Endurance | 1,000,000 cycles - suitable for applications requiring frequent field-updatable settings (e.g., metering, sensor calibration). |
| Data Retention | 40 years at 85°C - ensures long-term reliability in industrial temperature-grade deployments without refresh. |
| Page Write Size | 128 bytes per page - reduces write transaction overhead versus byte-write, improving efficiency in bulk configuration updates. |
| Standby Current | 1.0 µA at 1.8 V - minimizes quiescent power draw in always-on embedded nodes. |
Pinout & Package
AT24C512BN-SH-T is packaged in an 8-lead JEDEC SOIC (8S1), 3.9 mm × 4.9 mm body, 1.27 mm pitch, with NiPdAu lead finish. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired to GND/VCC to select one of eight possible addresses on shared I²C bus; floating defaults to logic low. |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up; supports wire-OR with other I²C devices. |
| SCL | Serial Clock Input | Positive-edge clock input for data sampling; negative-edge for data output; filtered for noise immunity. |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes; tied to GND enables full read/write access. |
| VCC | Power Supply | 1.8–3.6 V supply input; decoupling capacitor required near pin for stable I²C timing and noise rejection. |
| GND | Ground Reference | System ground return path; must be low-impedance to minimize I²C signal distortion and EMI susceptibility. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | 1.8 V to 3.6 V supply range enables direct interfacing with 1.8 V logic families and battery-powered IoT edge nodes. |
| Hardware + software write protection | WP pin provides immediate physical lockout; combined with software address locking, prevents accidental overwrites during firmware updates. |
| Noise-suppressed I²C interface | Schmitt-trigger inputs and internal filtering reduce false start/stop detection in electrically noisy industrial environments. |
| Cascadable architecture | Three address pins (A0–A2) allow up to eight AT24C512BN-SH-T devices on one I²C bus, simplifying multi-sensor system memory expansion. |
| Self-timed write cycle | Internal 5 ms max write completion eliminates need for fixed delay timers; host uses ACK polling for precise synchronization. |
Applications
| Industrial PLC Configuration Storage | Smart Meter Firmware Parameter Backup |
|---|---|
|
Use Scenario: Storing calibrated sensor offsets, PID tuning constants, and communication settings in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via I²C during boot and runtime reconfiguration. Use Value: Enables field-upgradable control logic without requiring flash reprogramming; retains settings across 10+ year service life. |
Use Scenario: Preserving tariff schedules, billing history, and metrology calibration data in utility smart meters exposed to wide temperature swings and intermittent power. IC Role / Device Role / Timing Role: High-reliability backup memory synchronized with main MCU during power-fail events using WP pin and low-ISB. Use Value: Guarantees 40-year data integrity and 1M write cycles-critical for regulatory compliance and tamper-proof logging. |
| Medical Device Calibration Vault | Automotive Body Control Module NVM |
|
Use Scenario: Securing factory-calibrated transducer gain/offset values and user-defined alarm thresholds in portable diagnostic equipment. IC Role / Device Role / Timing Role: Isolated, WP-protected memory partition accessed only during service mode via authenticated I²C commands. Use Value: Prevents unauthorized modification of safety-critical calibration data while supporting traceable recalibration workflows. |
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive body control units (BCUs) with CAN/I²C gateway architecture. IC Role / Device Role / Timing Role: Low-power standby EEPROM (1.0 µA @ 1.8 V) retaining user preferences across ignition cycles. Use Value: Delivers <1 µA quiescent current and AEC-Q200-aligned reliability for always-on vehicle memory subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Microchip AT24C512D-SSHM-T | Same 512 Kbit capacity, 1.7–5.5 V range, but uses newer "D" revision with enhanced ESD robustness (4 kV HBM) and tighter tAA spec (0.45 µs max). | Preferred for new designs requiring extended voltage margin and improved latch-up immunity in harsh environments. | Select AT24C512D-SSHM-T if upgrading for higher reliability; not drop-in due to minor AC timing differences. |
| ON Semiconductor CAT24C512WI-GT3 | Identical 65,536 × 8 organization and 1.8–5.5 V range, but rated for -40°C to +125°C (automotive grade) and features 100% AEC-Q100 stress testing. | Required for under-hood or ADAS-adjacent modules where extended temperature operation is mandatory. | Choose CAT24C512WI-GT3 for automotive qualification; pinout matches but WP behavior differs slightly (active-low enable). |
Compared with AT24C512BN-SH-T, the AT24C512D-SSHM-T offers broader voltage tolerance and better ESD resilience for next-gen industrial gateways, while the CAT24C512WI-GT3 delivers certified automotive-grade operation-neither is pin-compatible without validation of WP logic and timing margins.
Availability
AT24C512BN-SH-T is available at Aetrix Electronics and suitable for industrial control systems, smart metering infrastructure, and medical diagnostics equipment requiring stable component supply and long-term obsolescence management.
Supply support for AT24C512BN-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 continues to manufacture, qualify, and support the AT24Cxx EEPROM family under its broad serial memory portfolio.
The AT24C512BN-SH-T belongs to Microchip's industrial-grade serial EEPROM product line, designed specifically for reliable, low-power nonvolatile storage in embedded systems where write endurance, data retention, and I²C interoperability are critical.
FAQ
What is the operating voltage range for AT24C512BN-SH-T?
The AT24C512BN-SH-T operates from 1.8 V to 3.6 V, optimized for low-power systems. This 1.8 V minimum enables compatibility with modern 1.8 V microcontrollers and battery-powered devices, while the 3.6 V maximum ensures safe operation with common LDO outputs. Exceeding 3.6 V may damage the device.
Does AT24C512BN-SH-T support multiple devices on the same I²C bus?
Yes, AT24C512BN-SH-T supports up to eight devices on a single I²C bus using its three hardware address pins (A0, A1, A2). Each pin can be tied to GND or VCC to configure a unique 3-bit device address. Floating address pins default to logic low, but Microchip recommends hardwiring them for deterministic operation.
How does the Write Protect (WP) pin function on AT24C512BN-SH-T?
The WP pin on AT24C512BN-SH-T is active-high: when pulled to VCC, it disables all write operations (including page and byte writes) to protect stored data. When grounded, full read/write access is enabled. Internal pull-down ensures safe default behavior if left unconnected, though Microchip advises explicit routing for noise immunity.
What is the maximum write speed and timing behavior of AT24C512BN-SH-T?
AT24C512BN-SH-T supports up to 400 kHz I²C clock frequency at 1.8 V and up to 1 MHz at ≥2.5 V. Its internal write cycle completes in ≤5 ms, during which all inputs are ignored. Hosts must use ACK polling-not fixed delays-to detect write completion, ensuring robust timing across voltage and temperature variations.
Is AT24C512BN-SH-T RoHS-compliant and halogen-free?
Yes, AT24C512BN-SH-T is lead-free and halogen-free, meeting RoHS Directive 2011/65/EU and JEDEC JS709B requirements. Its NiPdAu lead finish provides superior solderability, corrosion resistance, and wire-bond compatibility-critical for high-reliability industrial and medical assemblies.
AT24C512BN-SH-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not 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
AT24C512BN-SH-T FAQ
1.How can I place an order for AT24C512BN-SH-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C512BN-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 AT24C512BN-SH-T reliable?
The price and inventory of AT24C512BN-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 AT24C512BN-SH-T is usually 5 days.
3.What payment methods are accepted for AT24C512BN-SH-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C512BN-SH-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C512BN-SH-T?
AT24C512BN-SH-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C512BN-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 AT24C512BN-SH-T?
For technical support, including AT24C512BN-SH-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C512BN-SH-T requirements.
6.How does Aetrix verify that AT24C512BN-SH-T is sourced from the original manufacturer or authorized distributors?
All AT24C512BN-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 AT24C512BN-SH-T meets industry standards.
7.What is the process for return or replacement of AT24C512BN-SH-T?
All AT24C512BN-SH-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C512BN-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 AT24C512BN-SH-T part is unused and in its original packaging.
Return procedure for AT24C512BN-SH-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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