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Microchip Technology AT24C512BN-SH25-T
- Part No.:
- AT24C512BN-SH25-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C512BN-SH25-T.pdf
- Description:
- IC EEPROM 512KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,071
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Product details
Overview
AT24C512BN-SH25-T from Microchip Technology (formerly Atmel) is a 512 Kbit I²C-compatible serial EEPROM with 65,536 × 8-bit organization, 2.5V–5.5V supply operation, 1 MHz interface speed at 2.5V/5.5V, hardware write protection via WP pin, and 128-byte page write capability. It serves as nonvolatile configuration storage in embedded controllers, industrial sensors, and power management systems.
For engineers reviewing the AT24C512BN-SH25-T datasheet, AT24C512BN-SH25-T pinout, AT24C512BN-SH25-T application, or AT24C512BN-SH25-T equivalent, this page delivers verified electrical specs, JEDEC SOIC-8 package details, noise-suppressed I²C timing compliance, endurance (1M cycles), and real-world substitution guidance for industrial-grade EEPROM selection.
Technical Context
The AT24C512BN-SH25-T implements a two-wire bidirectional I²C interface with Schmitt-triggered inputs and digital noise filtering, supporting up to eight devices on a shared bus via A0–A2 address pins. Its internal architecture includes a 16-bit address counter, page-addressable memory array, and high-voltage pump for byte/page write operations.
It operates across –40°C to +85°C industrial temperature range with 1.0 µA standby current at 1.8V and 6.0 µA at 5.5V, and features self-timed 5 ms max write cycle with acknowledge polling support. The device uses open-drain SDA/SCL with external pull-ups and supports both current-address and random-address read modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288 bits (65,536 × 8), enabling storage of firmware parameters or calibration data for mid-complexity embedded systems |
| Supply Voltage Range | 2.5V to 5.5V - compatible with legacy 3.3V and 5V microcontroller I/O domains without level shifting |
| I²C Clock Frequency | Up to 1 MHz at 2.5V/5.5V - enables faster configuration loading vs. standard 400 kHz EEPROMs |
| Write Cycle Time | 5 ms maximum - defines minimum interval between successive page writes in time-critical logging applications |
| Endurance | 1,000,000 write cycles - supports frequent recalibration or event logging over 10+ years in industrial equipment |
| Data Retention | 40 years at 85°C - ensures long-term reliability of stored settings in unattended infrastructure devices |
| Operating Temperature | –40°C to +85°C - validated for deployment in automotive body control modules and factory automation PLCs |
Pinout & Package
AT24C512BN-SH25-T is packaged in an 8-lead JEDEC-standard SOIC (package code 8S1), 3.9 mm × 4.9 mm body, 1.27 mm lead pitch, NiPdAu lead finish. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Hardware Device Address Inputs | Enable up to eight AT24C512BN-SH25-T devices on one I²C bus; must be hardwired to VCC or GND for deterministic addressing |
| SDA | Serial Data Line | Open-drain bidirectional I²C data line requiring external pull-up; supports wire-OR with other I²C peripherals |
| SCL | Serial Clock Input | Positive-edge clock input controlling data transfer timing; tolerant of 50 ns rise/fall times per AC spec |
| WP | Write Protect Control | Hardware lock: tied to VCC disables all writes; tied to GND enables full read/write access |
| VCC | Power Supply | 2.5V–5.5V main supply; decoupling capacitor required within 10 mm of pin for noise immunity |
| GND | Ground Reference | Signal and power return path; must be low-impedance connection to minimize I²C bus jitter |
Key Features
| Feature | Design Value |
|---|---|
| 128-byte Page Write Mode | Reduces firmware update time by 98% vs. byte-write: 128 bytes written in single 5 ms cycle instead of 128 × 5 ms |
| Schmitt Trigger + Filtered Inputs | Rejects >100 ns noise spikes on SDA/SCL, eliminating false start/stop detection in electrically noisy motor-control environments |
| Hardware + Software Write Protection | WP pin blocks all writes at silicon level; software lock bits provide additional granularity for sector-level protection |
| 1 MHz I²C Compatibility (2.5V/5.5V) | Enables 2.5× faster configuration load vs. 400 kHz EEPROMs-critical for boot-time parameter recovery in real-time systems |
| Industrial Temp Range (–40°C to +85°C) | Validated operation across full range without derating-supports deployment in outdoor telecom cabinets and HVAC controllers |
Applications
| Industrial Sensor Calibration | Medical Device Configuration Storage |
|---|---|
|
Use Scenario: Storing sensor offset/gain coefficients and linearization tables in pressure transmitters deployed in oil & gas pipelines. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed during power-on initialization and field recalibration events. Use Value: 40-year data retention ensures calibration integrity across equipment lifetime; 1M endurance supports quarterly recalibration over 25+ years. |
Use Scenario: Holding user preferences, alarm thresholds, and device ID in portable ECG monitors requiring FDA-compliant traceability. IC Role / Device Role / Timing Role: Secure configuration store with hardware write protection preventing accidental overwrite during firmware updates. Use Value: WP pin hardwired to VCC locks critical settings; 128-byte page writes enable fast patient profile loading during clinical handover. |
| Automotive Body Control Module | Smart Energy Meter Firmware Storage |
|
Use Scenario: Saving seat/mirror position memory and lighting profiles in 12V vehicle BCMs operating under wide thermal and voltage transients. IC Role / Device Role / Timing Role: Robust I²C slave device interfacing directly to 5V MCU GPIOs with no level shifters required. Use Value: 2.5V–5.5V operation tolerates battery dips to 6V and cold-crank surges; –40°C to +85°C rating covers under-hood conditions. |
Use Scenario: Storing tariff schedules, metering constants, and security keys in ANSI C12.22-compliant utility meters exposed to outdoor temperature extremes. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile memory with hardware write lock for regulatory-mandated parameters. Use Value: WP pin prevents unauthorized modification of billing parameters; 1 MHz I²C allows rapid firmware patching during AMI network updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics M24512-RDW6TP | 512 Kbit, 1.7–5.5V, 1 MHz I²C, same 8-lead SOIC package but with enhanced ESD (4 kV HBM) | Preferred where electrostatic robustness is critical (e.g., handheld test equipment assembly lines) | Select when higher ESD immunity is required; pinout and timing are identical, enabling drop-in replacement |
| ON Semiconductor CAT24C512WI-GT3 | 512 Kbit, 1.7–5.5V, 400 kHz max I²C speed, same SOIC-8 footprint but lacks 1 MHz mode | Suitable for cost-sensitive designs where 400 kHz bandwidth suffices (e.g., basic HVAC controllers) | Choose for lower-cost BOM where full 1 MHz speed is unnecessary; verify timing margins for existing I²C master clock |
Compared with AT24C512BN-SH25-T, M24512-RDW6TP offers superior ESD protection without layout changes, while CAT24C512WI-GT3 trades speed for cost-making the original optimal for performance-critical industrial firmware storage.
Availability
AT24C512BN-SH25-T is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive electronics requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for AT24C512BN-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 product support, qualification, and manufacturing continuity for the AT24Cxx EEPROM family.
The AT24C512B series was designed for reliable, low-power nonvolatile storage in space-constrained embedded systems requiring I²C interface simplicity and industrial-grade reliability.
FAQ
What is the maximum I²C clock frequency supported by AT24C512BN-SH25-T?
The AT24C512BN-SH25-T supports up to 1 MHz I²C clock frequency when operated at 2.5V or 5.5V supply. At 1.8V it is rated for 400 kHz only-but since AT24C512BN-SH25-T is a 2.5V–5.5V variant, its full 1 MHz capability applies. This enables faster parameter loading than standard 400 kHz EEPROMs in time-sensitive boot sequences.
Does AT24C512BN-SH25-T require external pull-up resistors on SDA and SCL lines?
Yes, AT24C512BN-SH25-T requires external pull-up resistors on both SDA and SCL lines because it uses open-drain outputs. Typical values are 1.3 kΩ for 2.5V/5V operation and 10 kΩ for 1.8V-though AT24C512BN-SH25-T operates exclusively in the 2.5V–5.5V range, so 1.3 kΩ is recommended for noise immunity and rise-time compliance.
How many AT24C512BN-SH25-T devices can share the same I²C bus?
Up to eight AT24C512BN-SH25-T devices can share a single I²C bus using the A0, A1, and A2 address pins. Each pin can be hardwired to VCC or GND, yielding 2³ = 8 unique 3-bit device addresses. Floating address pins default to GND internally, but Atmel recommends explicit termination to avoid capacitive coupling issues.
What is the function of the WP pin on AT24C512BN-SH25-T?
The WP (Write Protect) pin on AT24C512BN-SH25-T provides hardware-level write inhibition: when tied to VCC, all memory writes-including page and byte writes-are blocked. When tied to GND, full read/write access is enabled. This enables secure storage of immutable calibration or security keys without relying solely on software locks.
Is AT24C512BN-SH25-T compatible with standard JEDEC SOIC-8 footprints?
Yes, AT24C512BN-SH25-T uses the 8-lead JEDEC SOIC package (8S1), with 3.9 mm × 4.9 mm body, 1.27 mm lead pitch, and 1.75 mm max height-fully compliant with IPC-7351B SOIC_N footprint standards. Its NiPdAu lead finish ensures solderability and wire-bond compatibility in automated assembly processes.
AT24C512BN-SH25-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:
- 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
AT24C512BN-SH25-T FAQ
1.How can I place an order for AT24C512BN-SH25-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C512BN-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 AT24C512BN-SH25-T reliable?
The price and inventory of AT24C512BN-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 AT24C512BN-SH25-T is usually 5 days.
3.What payment methods are accepted for AT24C512BN-SH25-T?
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4.How is shipping managed for AT24C512BN-SH25-T?
AT24C512BN-SH25-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C512BN-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 AT24C512BN-SH25-T?
For technical support, including AT24C512BN-SH25-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C512BN-SH25-T requirements.
6.How does Aetrix verify that AT24C512BN-SH25-T is sourced from the original manufacturer or authorized distributors?
All AT24C512BN-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 AT24C512BN-SH25-T meets industry standards.
7.What is the process for return or replacement of AT24C512BN-SH25-T?
All AT24C512BN-SH25-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C512BN-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 AT24C512BN-SH25-T part is unused and in its original packaging.
Return procedure for AT24C512BN-SH25-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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