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Microchip Technology AT24C512C-U1UM-T
- Part No.:
- AT24C512C-U1UM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFBGA, WLCSP
- Datasheet:
-
AT24C512C-U1UM-T.pdf
- Description:
- IC EEPROM 512KBIT I2C 8WLCSP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT24C512C-U1UM-T from Microchip Technology is a 512-Kbit I²C-compatible serial EEPROM organized as 65,536 × 8 bits, operating from 1.7V to 3.6V or 2.5V to 5.5V, with industrial temperature range (−40°C to +85°C), 1 MHz Fast Mode Plus support, and hardware write protection via WP pin - used for firmware storage, calibration data retention, and configuration backup in embedded controllers and IoT edge nodes.
For engineers reviewing the AT24C512C-U1UM-T datasheet, AT24C512C-U1UM-T pinout, AT24C512C-U1UM-T application, or AT24C512C-U1UM-T equivalent, key selection criteria include I²C bus voltage compatibility (1.7–5.5V), page write capability (128-byte pages), ultra-low standby current (≤6 μA), and hardware write-protect functionality for secure nonvolatile parameter storage.
Technical Context
The AT24C512C-U1UM-T implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA/SCL inputs, supporting Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) timing across dual VCC ranges. It uses an internal high-voltage generation circuit for EEPROM cell programming and integrates a power-on reset (POR) circuit with 100 µs tPUP delay.
Memory is organized into 512 pages of 128 bytes each, enabling partial-page writes and random/sequential reads. Device addressing uses three hardware pins (A0–A2) to support up to eight devices on one bus, with address decoding performed by an internal hardware comparator synchronized to SCL rising edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (65,536 × 8 bits) - supports full firmware image storage or multi-sensor calibration tables in compact systems. |
| VCC Range | 1.7V–3.6V or 2.5V–5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifters. |
| I²C Speed Modes | 100 kHz / 400 kHz / 1 MHz FM+ - allows high-throughput configuration updates in time-critical applications like industrial PLCs. |
| Write Endurance | 1,000,000 cycles - ensures reliable logging of operational parameters over 10+ years in field-deployed equipment. |
| Data Retention | 100 years at 55°C - guarantees long-term integrity of calibration coefficients and security keys without refresh. |
| Standby Current | ≤6 μA at 5.5V - minimizes battery drain in always-on IoT sensors and portable medical devices. |
| Page Write Size | 128 bytes - reduces write latency vs. byte-write-only EEPROMs and enables efficient bulk parameter updates. |
| Write Protection | Hardware WP pin - prevents accidental overwrites during firmware execution or brown-out conditions. |
Pinout & Package
AT24C512C-U1UM-T is supplied in an 8-pad UDFN package (2.0 mm × 1.6 mm, 0.5 mm pitch), optimized for space-constrained PCB layouts in wearables and sensor modules. The exposed pad may be connected to GND or left floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired to GND/VCC to configure one of eight possible I²C slave addresses; internally pulled down if floating. |
| A1 | Device Address Input | Second address bit for multi-device bus topology; requires stable biasing to avoid address ambiguity. |
| A2 | Device Address Input | Third address bit enabling up to eight AT24C512C-U1UM-T devices on shared SDA/SCL lines. |
| GND | Ground Reference | System return path for VCC and I/O; must be low-impedance to ensure noise immunity during write cycles. |
| SDA | Serial Data I/O | Open-drain bidirectional line requiring external pull-up (≤10 kΩ); transmits ACK/NACK and carries all command/data. |
| SCL | Serial Clock Input | Master-generated clock controlling data latching (rising edge) and output timing (falling edge); filtered for EMI resilience. |
| WP | Write-Protect Control | Active-high pin disabling all writes when tied to VCC; prevents corruption during power transitions or firmware faults. |
| VCC | Power Supply | Single-supply input supporting dual voltage grades; must ramp monotonically at ≤0.1 V/µs to meet POR requirements. |
Key Features
| Feature | Design Value |
|---|---|
| Fast Mode Plus (1 MHz) | Enables 12.5× faster configuration loading vs. standard 100 kHz I²C, critical for rapid device provisioning in factory test. |
| Schmitt-triggered inputs | Rejects >50 ns noise spikes on SDA/SCL, eliminating false start/stop detection in electrically noisy industrial environments. |
| 128-byte page write | Reduces typical 64K write time from ~50 s (byte mode) to ~400 ms, accelerating field firmware patch deployment. |
| Hardware write protection | Prevents unintended memory modification during MCU reset, brown-out, or software crash - no firmware dependency required. |
| Green RoHS-compliant packaging | Meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL1), enabling standard reflow without baking or special handling. |
| 100-year data retention | Eliminates need for periodic data refresh in sealed systems (e.g., smart meters, implantable devices) where access is impossible. |
Applications
| Industrial Sensor Node | Medical Diagnostic Device |
|---|---|
|
Use Scenario: Stores calibrated offset/gain values for analog front-end channels and timestamped fault logs in battery-powered wireless sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration register and event logger; retains data across 10+ year deployments with zero maintenance. Use Value: Enables field recalibration without disassembly and preserves diagnostic history for regulatory audit compliance. |
Use Scenario: Holds patient-specific therapy parameters, device serial number, and usage counters in portable ultrasound or glucose monitors. IC Role / Device Role / Timing Role: Secure parameter vault with hardware write-lock; immune to software crashes during critical treatment sequences. Use Value: Ensures traceability and safety-critical settings persist through battery swaps and firmware updates. |
| Smart Energy Meter | Automotive Body Control Module |
|
Use Scenario: Records tariff schedules, meter firmware version, tamper events, and accumulated kWh readings in utility-grade meters. IC Role / Device Role / Timing Role: High-reliability data logger with 1M write endurance; withstands 20+ years of daily billing cycles. Use Value: Meets ANSI C12.22 and IEC 62056 standards for secure, auditable energy data storage. |
Use Scenario: Saves seat/mirror position presets, door lock configurations, and adaptive lighting profiles in automotive ECUs. IC Role / Device Role / Timing Role: Low-power configuration store accessed only during ignition-on or sleep-wake transitions. Use Value: Delivers <6 μA standby draw to meet ISO 16750-2 quiescent current limits for 10-year battery life. |
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/K | Same 512-Kbit density and I²C interface, but rated only to 400 kHz max; lacks FM+ support and has higher 10 μA standby current. | Acceptable for cost-sensitive consumer electronics where 1 MHz speed and ultra-low power are not required. | Select when budget constraints outweigh performance needs and 400 kHz bandwidth suffices. |
| ON Semiconductor CAT24C512HU4IGT3 | Identical 512-Kbit capacity and FM+ support, but specified for −40°C to +125°C extended temp range and features enhanced ESD (8 kV). | Better suited for under-hood automotive or outdoor infrastructure where ambient exceeds +85°C. | Choose for harsh-environment designs requiring wider thermal margin and higher robustness. |
Compared with AT24C512C-U1UM-T, M24512-RDW6TP/K trades speed and power efficiency for lower unit cost, while CAT24C512HU4IGT3 extends thermal and ESD capability at equivalent performance - making AT24C512C-U1UM-T the optimal balance for industrial and medical applications demanding 1 MHz operation and sub-μA standby.
Availability
AT24C512C-U1UM-T is available at Aetrix Electronics and suitable for industrial sensor nodes, medical diagnostics equipment, and smart energy metering systems requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.
Supply support for AT24C512C-U1UM-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 is a leading provider of microcontroller, analog, FPGA, and memory solutions, with a focus on reliability, low-power design, and long-term product availability for industrial and automotive markets.
The AT24C512C-U1UM-T belongs to Microchip's AT24C family of I²C serial EEPROMs, engineered for robust nonvolatile data storage in resource-constrained embedded systems where deterministic timing, low voltage operation, and high endurance are essential.
FAQ
What voltage ranges does the AT24C512C-U1UM-T support, and how do they affect I²C speed modes?
The AT24C512C-U1UM-T supports two VCC ranges: 1.7V–3.6V (low-voltage grade) and 2.5V–5.5V (standard-voltage grade). At 1.7V–2.5V, it operates up to 400 kHz Fast mode; above 2.5V, it supports 1 MHz Fast Mode Plus. This dual-range design allows seamless integration with both 1.8V logic and legacy 5V systems without external level translation.
How does the hardware write-protect (WP) pin function on the AT24C512C-U1UM-T?
When the WP pin is driven high (to VCC), the AT24C512C-U1UM-T disables all write operations to its entire memory array - including byte, page, and erase commands. If left unconnected, WP is internally pulled down to GND, enabling normal writes. Microchip recommends hardwiring WP to a known state to prevent spurious writes due to capacitive coupling.
What is the maximum write cycle time for the AT24C512C-U1UM-T, and how does page write improve efficiency?
The AT24C512C-U1UM-T completes internal write cycles in ≤5 ms per page (128 bytes). Unlike byte-write-only EEPROMs requiring 5 ms per byte (up to 328 s for full memory), page write reduces full 64K write time to ~400 ms - enabling rapid firmware updates or bulk calibration uploads in production test and field service scenarios.
Does the AT24C512C-U1UM-T require external pull-up resistors on SDA and SCL, and what values are recommended?
Yes - the AT24C512C-U1UM-T has open-drain SDA and input-only SCL, both requiring external pull-up resistors. For 1 MHz FM+, Microchip specifies ≤1.3 kΩ; for 400 kHz, ≤4 kΩ; and for 100 kHz, ≤10 kΩ. These values ensure signal rise times meet tR ≤300 ns while limiting bus current to safe levels per I²C specification.
What is the endurance and data retention specification for the AT24C512C-U1UM-T, and how are these validated?
The AT24C512C-U1UM-T guarantees 1,000,000 write cycles and 100 years of data retention at 55°C, verified through accelerated life testing per JEDEC JESD22-A117 and qualification per AEC-Q200. These figures reflect actual measured cell performance - not extrapolated estimates - ensuring predictable lifetime in mission-critical applications.
AT24C512C-U1UM-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WLCSP
AT24C512C-U1UM-T FAQ
1.How can I place an order for AT24C512C-U1UM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C512C-U1UM-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 AT24C512C-U1UM-T reliable?
The price and inventory of AT24C512C-U1UM-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C512C-U1UM-T is usually 5 days.
3.What payment methods are accepted for AT24C512C-U1UM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C512C-U1UM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C512C-U1UM-T?
AT24C512C-U1UM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C512C-U1UM-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 AT24C512C-U1UM-T?
For technical support, including AT24C512C-U1UM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C512C-U1UM-T requirements.
6.How does Aetrix verify that AT24C512C-U1UM-T is sourced from the original manufacturer or authorized distributors?
All AT24C512C-U1UM-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 AT24C512C-U1UM-T meets industry standards.
7.What is the process for return or replacement of AT24C512C-U1UM-T?
All AT24C512C-U1UM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C512C-U1UM-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 AT24C512C-U1UM-T part is unused and in its original packaging.
Return procedure for AT24C512C-U1UM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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