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Microchip Technology AT24CM01-UUM-T
- Part No.:
- AT24CM01-UUM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFBGA, WLCSP
- Datasheet:
-
AT24CM01-UUM-T.pdf
- Description:
- IC EEPROM 1MBIT I2C 1MHZ 8WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,737
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Product details
Overview
AT24CM01-UUM-T from Microchip Technology is a 1-Mbit (131,072 × 8) I²C-compatible serial EEPROM optimized for low-voltage industrial applications. It operates from 1.7V to 5.5V, supports 1 MHz Fast Mode Plus at 2.5–5.5V, delivers ultra-low standby current (6 µA max), and features hardware write protection via the WP pin for full-array data security in embedded control systems.
For engineers reviewing the AT24CM01-UUM-T datasheet, AT24CM01-UUM-T pinout, AT24CM01-UUM-T application, or AT24CM01-UUM-T equivalent, key selection criteria include its dual-voltage operation range, 256-byte page write capability with ≤5 ms self-timed writes, built-in error detection and correction, and compatibility with multi-device I²C bus configurations using A1/A2 address inputs.
Technical Context
The AT24CM01-UUM-T implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. Its memory is organized as 512 pages of 256 bytes each, supporting byte, partial-page, and sequential read/write operations with ACK polling and software reset recovery.
It integrates an internal high-voltage generation circuit for EEPROM programming, power-on reset (POR) with 100 µs tPUP delay, and a hardware address comparator enabling up to four devices on one bus via A1/A2 pins - all operating across -40°C to +85°C with 1,000,000 write cycles and 100-year data retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Mbit (131,072 × 8 bits), organized as 512 pages × 256 bytes - enables efficient firmware parameter storage with page-level write granularity. |
| Supply voltage range | 1.7V to 5.5V - supports direct interfacing with 1.8V, 2.5V, 3.3V, and 5V microcontrollers without level shifting. |
| I²C speed modes | 100 kHz (Std), 400 kHz (Fast), 1 MHz (Fast Mode Plus at ≥2.5V) - allows bandwidth scaling based on system noise and timing margin requirements. |
| Write cycle time | ≤5 ms maximum - ensures predictable firmware update latency and simplifies timeout handling in host firmware. |
| Standby current | 6 µA maximum at 5.5V - minimizes battery drain in always-on IoT sensor nodes and portable medical devices. |
| Data retention | 100 years at 55°C - guarantees long-term calibration data integrity in industrial monitoring equipment. |
| Endurance | 1,000,000 write cycles - supports frequent logging or configuration updates in programmable logic controllers (PLCs). |
Pinout & Package
AT24CM01-UUM-T is supplied in an 8-ball WLCSP (Wafer-Level Chip Scale Package) with 0.4 mm pitch, measuring 2.0 mm × 1.6 mm - ideal for space-constrained wearables and compact sensor modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Device power supply | Accepts 1.7–5.5V; powers internal charge pump and logic; requires local decoupling capacitor (0.1 µF). |
| SDA | Serial data bidirectional I/O | Open-drain output; must be pulled high externally (≤10 kΩ); shares bus with other I²C slaves. |
| SCL | Serial clock input | Input-only; rising edge latches data, falling edge clocks out data; requires external pull-up. |
| WP | Hardware write-protect control | Logic high (VCC) disables all writes; floating defaults to GND (enabled); prevents accidental overwrites during power transients. |
| A1, A2 | Hardware device address inputs | Set upper bits of 7-bit I²C address (1010xxxA); allow up to four AT24CM01-UUM-T devices on same bus. |
| GND | Ground reference | System ground return path; must be low-impedance connection to minimize noise coupling into SDA/SCL. |
| NC | No-connect | Internally unconnected; no electrical function; left floating per design - no external tie required. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in error detection and correction | Automatically detects and corrects bit errors during read operations - improves data reliability in electrically noisy factory environments. |
| 256-byte page write mode | Allows partial-page writes without erasing entire page - reduces write time and extends EEPROM lifetime in dynamic configuration storage. |
| Schmitt-triggered, filtered inputs | Suppresses >100 ns noise spikes on SDA/SCL - eliminates false start/stop detection in motor-drive or switching-power-supply proximity. |
| Ultra-low active current (3 mA max) | Minimizes instantaneous power demand during write cycles - avoids brown-out in energy-harvesting systems with limited peak current capacity. |
| Green package (RoHS, halide-free) | Meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) - enables standard reflow assembly without baking. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing user-defined I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing persistent settings across power cycles and firmware updates. Use Value: Enables field-reprogrammable operation without requiring external programming hardware; 1,000,000 endurance supports daily parameter adjustments over 10+ years. | Use Scenario: Retaining factory-calibrated sensor offsets and gain coefficients in portable ECG monitors and infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for critical analog front-end calibration data accessed at boot. Use Value: WP pin hardware lock prevents runtime corruption; 100-year retention ensures accuracy compliance throughout device lifecycle. |
| Smart Energy Meter Firmware Logs | Automotive Body Control Module Settings |
Use Scenario: Recording time-stamped energy consumption snapshots and tamper events in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: High-reliability data logger with deterministic 5 ms write latency for time-critical event capture. Use Value: Page-write efficiency reduces bus occupancy; low 6 µA standby current extends battery backup life during grid outages. | Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in automotive body control units (BCUs). IC Role / Device Role / Timing Role: Automotive-grade EEPROM interfacing directly with 3.3V CAN/LIN microcontrollers via I²C. Use Value: -40°C to +85°C operation meets AEC-Q100 ambient requirements; 1.7V min VCC supports cold-cranking scenarios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C1024B-SSHD-T | Same 1-Mbit density but only supports 100/400 kHz I²C; no FM+ (1 MHz) mode; max VCC = 5.5V only. | Lacks Fast Mode Plus support - unsuitable where 1 MHz timing margin is required for high-throughput logging. | Select AT24C1024B-SSHD-T only if system clock budget excludes 1 MHz operation and cost is primary constraint. |
| M95M01-RMN6TP | 1-Mbit SPI EEPROM (not I²C); 5V-only supply (4.5–5.5V); no WP pin - uses software write enable. | Requires SPI interface redesign and lacks hardware write protection - increases firmware complexity and security risk. | Choose M95M01-RMN6TP only when migrating from SPI-based designs and I²C bus resources are unavailable. |
Compared with AT24C1024B-SSHD-T, the AT24CM01-UUM-T adds 1 MHz I²C capability and broader voltage range (1.7V min), while M95M01-RMN6TP trades interface simplicity for protocol incompatibility and reduced voltage flexibility - making AT24CM01-UUM-T optimal for new I²C-based industrial designs demanding speed and robustness.
Availability
AT24CM01-UUM-T is available at Aetrix Electronics and suitable for industrial PLCs, medical calibration systems, smart energy meters, and automotive body control modules requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT24CM01-UUM-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions for industrial, automotive, and communications markets.
The AT24CM01-UUM-T belongs to Microchip's AT24Cxx family of I²C EEPROMs, engineered for reliable, low-power data storage in space- and power-constrained embedded systems with extended temperature and longevity requirements.
FAQ
What is the minimum supply voltage required for reliable operation of the AT24CM01-UUM-T?
The AT24CM01-UUM-T supports true low-voltage operation down to 1.7V across its full industrial temperature range (-40°C to +85°C). At this voltage, it maintains 100 kHz I²C communication and retains full functionality including page writes and hardware write protection - enabling direct integration with 1.8V microcontrollers without level shifters.
Does the AT24CM01-UUM-T support 1 MHz I²C communication across its entire voltage range?
No - the AT24CM01-UUM-T supports 1 MHz Fast Mode Plus only when VCC is between 2.5V and 5.5V. Below 2.5V, maximum I²C speed is limited to 400 kHz (Fast mode) from 1.7V upward. This voltage-dependent speed grading ensures timing margin integrity while maximizing bandwidth where supply conditions permit.
How does the Write-Protect (WP) pin function on the AT24CM01-UUM-T?
When the WP pin is driven high (VCC), the AT24CM01-UUM-T inhibits all write operations to its entire memory array - including byte, page, and sequential writes. If left floating, the pin is internally pulled down to GND, enabling normal writes. Microchip recommends hardwiring WP to a known state (GND or VCC) using ≤10 kΩ resistors to prevent noise-induced corruption.
What is the memory organization of the AT24CM01-UUM-T, and how does it affect write performance?
The AT24CM01-UUM-T organizes its 1-Mbit array into 512 pages of 256 bytes each. This structure enables 256-byte page writes with ≤5 ms self-timed completion - significantly faster than byte-by-byte writes. Partial-page writes are allowed, letting hosts optimize throughput by aligning data to page boundaries without erasing unused bytes.
Is the AT24CM01-UUM-T compatible with standard I²C bus arbitration and multi-master systems?
Yes - the AT24CM01-UUM-T fully complies with the I²C specification for slave devices, supporting standard start/stop conditions, acknowledge/nack handshaking, and clock stretching. Its open-drain SDA/SCL interface and built-in spike filtering ensure robust interoperability in multi-slave buses, including those shared with other I²C peripherals like sensors and DACs.
AT24CM01-UUM-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:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 550 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WLCSP
AT24CM01-UUM-T FAQ
1.How can I place an order for AT24CM01-UUM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24CM01-UUM-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 AT24CM01-UUM-T reliable?
The price and inventory of AT24CM01-UUM-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24CM01-UUM-T is usually 5 days.
3.What payment methods are accepted for AT24CM01-UUM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24CM01-UUM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24CM01-UUM-T?
AT24CM01-UUM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24CM01-UUM-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 AT24CM01-UUM-T?
For technical support, including AT24CM01-UUM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24CM01-UUM-T requirements.
6.How does Aetrix verify that AT24CM01-UUM-T is sourced from the original manufacturer or authorized distributors?
All AT24CM01-UUM-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 AT24CM01-UUM-T meets industry standards.
7.What is the process for return or replacement of AT24CM01-UUM-T?
All AT24CM01-UUM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24CM01-UUM-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 AT24CM01-UUM-T part is unused and in its original packaging.
Return procedure for AT24CM01-UUM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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