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Microchip Technology AT24C512C-CUM-T
- Part No.:
- AT24C512C-CUM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VFBGA, DSBGA
- Datasheet:
-
AT24C512C-CUM-T.pdf
- Description:
- IC EEPROM 512KBIT I2C 8DBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,813
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Product details
Overview
AT24C512C-CUM-T from Microchip Technology is a 512-Kbit I²C-compatible serial EEPROM organized as 65,536 × 8 bits, operating from 1.7V to 5.5V across industrial temperature (–40°C to +85°C), supporting 1 MHz Fast Mode Plus, and featuring hardware write-protection via the WP pin for nonvolatile data storage in embedded control systems.
For engineers reviewing the AT24C512C-CUM-T datasheet, AT24C512C-CUM-T pinout, AT24C512C-CUM-T application, or AT24C512C-CUM-T equivalent, key selection criteria include voltage-grade compatibility (1.7–3.6V or 2.5–5.5V), page-write latency (≤5 ms), endurance (1M cycles), data retention (100 years), and 8-lead UDFN package footprint with internal pull-downs on A0/A1/A2/WP.
Technical Context
The AT24C512C-CUM-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-where FM+ requires VCC ≥ 2.5V. It uses an internal high-voltage generation circuit for EEPROM programming and includes a Power-on Reset (POR) circuit with 100 µs tPUP delay after stable VCC.
Memory is partitioned into 512 pages of 128 bytes each, enabling partial-page writes. Device addressing uses three hardware pins (A0–A2) to support up to eight devices on one bus, with a fixed 4-bit device type identifier (1010b) and R/W bit. Write protection is implemented via direct VCC/GND connection to the WP pin, disabling all writes when pulled high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 512 Kbit (65,536 × 8), enabling storage of firmware patches, calibration data, or configuration profiles in space-constrained designs |
| Supply voltage range | 1.7V–3.6V (low-voltage grade) or 2.5V–5.5V (standard grade); dual-range operation supports mixed-voltage system integration |
| I²C speed modes | 100 kHz (std), 400 kHz (fast), 1 MHz (FM+); FM+ enables faster bulk writes where host controller and layout support 2.5V+ VCC |
| Write endurance | 1,000,000 cycles per memory location-suitable for logging or dynamic parameter storage with frequent updates |
| Data retention | 100 years at 55°C-ensures long-term reliability in unattended industrial deployments without refresh |
| Active/standby current | Max 3 mA active (write), max 6 µA standby-critical for battery-backed or energy-harvesting applications |
| Page write size | 128-byte pages with partial-write capability-reduces write overhead vs. byte-wise operations and avoids unnecessary erase cycles |
Pinout & Package
AT24C512C-CUM-T is packaged in an 8-pad UDFN (2.0 mm × 1.6 mm, 0.5 mm pitch) with wettable flanks, optimized for automated optical inspection and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device address input | Hardwired to GND/VCC to set LSB of 3-bit hardware address; internally pulled down if floating-must be externally biased for deterministic multi-device bus operation |
| A1 | Device address input | Second bit of 3-bit hardware slave address; same internal pull-down behavior as A0-enables up to eight devices on shared I²C bus |
| A2 | Device address input | MSB of 3-bit hardware slave address; required for cascading multiple AT24C512C-CUM-T units without address conflict |
| GND | Ground reference | System ground return path; must be low-impedance connection to minimize noise coupling into sensitive analog or timing circuits |
| SDA | Serial data bidirectional I/O | Open-drain output/input requiring external pull-up (≤10 kΩ); supports wire-OR with other I²C devices; latched on SCL rising edge |
| SCL | Serial clock input | Master-generated clock; falling-edge data output timing; must be pulled high externally; integrated noise filtering reduces false start/stop detection |
| WP | Hardware write-protect enable | Pulled high to VCC to lock full memory array; pulled low to GND for normal writes; internal pull-down ensures safe default state if left unconnected |
| VCC | Power supply | 1.7–5.5V operation; slew rate ≤0.1 V/µs required during power-up; POR circuit enforces 100 µs delay before first command acceptance |
Key Features
| Feature | Design Value |
|---|---|
| 128-byte page write mode | Reduces average write time by >90% vs. byte writes-enables efficient firmware update staging in microcontroller bootloaders |
| Schmitt-triggered, filtered inputs | Suppresses bus noise up to 50 ns spikes-eliminates need for external RC filters in electrically noisy industrial environments |
| Two voltage-grade operation | Single BOM supports both 1.8V/3.3V and 5V systems-reduces inventory complexity for multi-platform product families |
| Hardware write protection (WP) | Prevents accidental overwrites during power transients or firmware bugs-critical for storing immutable calibration or security keys |
| Green packaging | RoHS-compliant, halide-free, lead-free UDFN-meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for unlimited floor life |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and temperature compensation tables in smart pressure or flow sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed at power-up and during field recalibration; I²C interface allows sharing bus with ADC and MCU. Use Value: Enables traceable, field-updatable calibration without requiring reprogramming tools-supports ISO 13485 compliance for medical-grade instrumentation. |
Use Scenario: Retaining user preferences, therapy parameters, and audit logs in portable infusion pumps and diagnostic handhelds. IC Role / Device Role / Timing Role: Secure, low-power parameter storage with WP pin tied to system security controller to prevent tampering during runtime. Use Value: Guarantees data integrity across 10+ year device lifespan and >1M clinical usage cycles-meets IEC 62304 software safety requirements. |
| Automotive Body Control Module | Smart Energy Metering |
|
Use Scenario: Saving seat/mirror position memory, lighting profiles, and fault codes in 12V automotive BCMs operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Robust EEPROM interfaced to 3.3V microcontroller via I²C; WP pin controlled by system watchdog to block writes during reset sequences. Use Value: Survives load-dump transients and cold-cranking voltage dips due to wide VCC range and 100-year data retention-AEC-Q200 stress-tested. |
Use Scenario: Logging tariff schedules, demand-response events, and meter firmware version history in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: High-endurance data logger using page writes to record timestamped kWh values every 15 minutes for 10+ years. Use Value: Achieves >1M write cycles per sector-exceeds ANSI C12.19 lifetime logging requirements without wear-leveling firmware overhead. |
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 I²C interface, but in 8-lead SOIC package; lacks FM+ support (max 400 kHz); rated for 1.8V–5.5V only | Preferred for through-hole prototyping or legacy board redesigns where UDFN rework is impractical | Select when mechanical compatibility with existing SOIC footprints is mandatory and 1 MHz speed is unnecessary |
| M95512-DRMN6TP/K | 512-Kbit SPI EEPROM (not I²C); operates 1.8V–5.5V; supports 10 MHz SPI clock; no WP pin-protection via software lock bits | Suitable where host MCU has SPI bandwidth headroom but limited I²C peripherals, or where daisy-chain topology is needed | Choose only if switching from I²C to SPI is acceptable and firmware can implement lock-bit management instead of hardware WP |
Compared with AT24C512BN-SH-T, the AT24C512C-CUM-T offers higher-speed FM+ operation and smaller UDFN packaging for modern compact designs; versus M95512-DRMN6TP/K, it retains native I²C compatibility and hardware write protection-critical for systems where bus protocol and physical security cannot be compromised.
Availability
AT24C512C-CUM-T is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart energy metering requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.
Supply support for AT24C512C-CUM-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 global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with a focus on reliability, low-power design, and long-term product availability.
The AT24C512C-CUM-T belongs to Microchip's AT24Cxx family of I²C serial EEPROMs, engineered for robust nonvolatile data storage in harsh environments-designed specifically for industrial, automotive, and medical applications demanding extended temperature operation and high endurance.
FAQ
What voltage ranges does the AT24C512C-CUM-T support, and how do they affect I²C speed mode selection?
The AT24C512C-CUM-T supports two overlapping voltage grades: 1.7V–3.6V (low-voltage) and 2.5V–5.5V (standard). Standard mode (100 kHz) and Fast mode (400 kHz) operate across the full 1.7V–5.5V range, while Fast Mode Plus (1 MHz) requires VCC ≥ 2.5V. This dual-grade design allows the AT24C512C-CUM-T to serve both 1.8V/3.3V and 5V systems without derating performance-making it ideal for mixed-voltage platforms where the same EEPROM part number simplifies BOM management.
How does the WP pin function on the AT24C512C-CUM-T, and what happens if it's left unconnected?
The WP (Write-Protect) pin on the AT24C512C-CUM-T disables all write operations-including byte, page, and erase-when pulled high to VCC. When tied to GND, full write access is enabled. If left floating, the AT24C512C-CUM-T's internal strong pull-down biases WP to GND, allowing writes-but Microchip explicitly warns against this due to risk of capacitive coupling causing intermittent protection failure. For production designs, AT24C512C-CUM-T requires explicit routing of WP to either VCC or GND with ≤10 kΩ pull-up/down resistors to ensure deterministic behavior.
What is the maximum write cycle time for the AT24C512C-CUM-T, and how does page write mode improve efficiency?
The AT24C512C-CUM-T guarantees a maximum self-timed write cycle time of 5 ms per operation-whether byte or page write. Its 128-byte page write mode allows up to 128 bytes to be written in that same 5 ms window, reducing effective write latency by up to 128× compared to sequential byte writes. This makes the AT24C512C-CUM-T highly efficient for firmware patch storage or bulk configuration updates, especially when paired with microcontrollers that support burst I²C transfers aligned to page boundaries.
Does the AT24C512C-CUM-T require external pull-up resistors on SDA and SCL, and what values are recommended?
Yes-the AT24C512C-CUM-T's SDA and SCL pins are open-drain and require external pull-up resistors to VCC. Microchip specifies maximum values of 10 kΩ for SDA and SCL, with tighter recommendations based on I²C speed: 10 kΩ for Standard mode (100 kHz), 4 kΩ for Fast mode (400 kHz), and 1.3 kΩ for Fast Mode Plus (1 MHz). These values ensure rise times meet AC timing specs (tR ≤ 300 ns) while maintaining noise immunity-critical for reliable operation in electrically noisy industrial settings where the AT24C512C-CUM-T is commonly deployed.
How many devices can share the same I²C bus with the AT24C512C-CUM-T, and how is addressing managed?
Up to eight AT24C512C-CUM-T devices can coexist on a single I²C bus using hardware address pins A0, A1, and A2. Each pin accepts GND or VCC to configure a unique 3-bit slave address, combining with the fixed device type identifier (1010b) to form a full 7-bit address. The AT24C512C-CUM-T ignores addresses that don't match its configured A0–A2 state, enabling deterministic multi-device communication without software arbitration-essential for modular sensor nodes or distributed control systems where multiple EEPROMs store distinct subsystem configurations.
AT24C512C-CUM-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFBGA, DSBGA
- 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-dBGA (2.35x3.73)
AT24C512C-CUM-T FAQ
1.How can I place an order for AT24C512C-CUM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C512C-CUM-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-CUM-T reliable?
The price and inventory of AT24C512C-CUM-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-CUM-T is usually 5 days.
3.What payment methods are accepted for AT24C512C-CUM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C512C-CUM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C512C-CUM-T?
AT24C512C-CUM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C512C-CUM-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-CUM-T?
For technical support, including AT24C512C-CUM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C512C-CUM-T requirements.
6.How does Aetrix verify that AT24C512C-CUM-T is sourced from the original manufacturer or authorized distributors?
All AT24C512C-CUM-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-CUM-T meets industry standards.
7.What is the process for return or replacement of AT24C512C-CUM-T?
All AT24C512C-CUM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C512C-CUM-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-CUM-T part is unused and in its original packaging.
Return procedure for AT24C512C-CUM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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