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Microchip Technology AT25M01-UUM-T
- Part No.:
- AT25M01-UUM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFBGA, WLCSP
- Datasheet:
-
AT25M01-UUM-T.pdf
- Description:
- IC EEPROM 1MBIT SPI 20MHZ 8WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,916
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Product details
Overview
AT25M01-UUM-T from Microchip Technology is a 1 Mbit SPI Serial EEPROM (131,072 × 8) optimized for low-voltage embedded systems, supporting 1.7V–5.5V operation, industrial temperature range (−40°C to +85°C), and 20 MHz clock rate at 5V. It delivers reliable nonvolatile storage in space-constrained applications such as IoT sensor nodes and industrial controllers.
For engineers reviewing the AT25M01-UUM-T datasheet, AT25M01-UUM-T pinout, AT25M01-UUM-T application, or AT25M01-UUM-T equivalent, key selection criteria include its 256-byte page write capability, hardware/software write protection via WP and STATUS register, HOLD pin for serial bus suspension, and verified 1,000,000 write endurance with 100-year data retention.
Technical Context
The AT25M01-UUM-T implements a synchronous SPI slave interface compliant with Modes 0 and 3, latching input on SCK rising edge and outputting on falling edge. Its internal architecture includes a high-voltage generation circuit, address register/counter, and dedicated write protection control logic that enforces block-level (1/4, 1/2, or full array) and pin-based (WP) protection independently.
It features a self-timed write cycle ≤5 ms across full VCC range (1.7V–5.5V), power-on reset (POR) with 100 µs tPUP delay, and software reset via CS toggle. The STATUS register (8-bit) provides real-time RDY/BSY status, WEL state, BP1/BP0 protection configuration, and WPEN enable control-nonvolatile across power cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,048,576 bits (131,072 × 8), enabling firmware parameter storage or calibration data logging without external memory expansion |
| Interface | SPI slave, Modes 0 & 3 compatible; requires only CS, SCK, SI, SO - minimal GPIO overhead on microcontrollers |
| VCC Range | 1.7V to 5.5V; supports direct interfacing with 1.8V, 3.3V, and 5V logic domains without level shifters |
| Max Clock Rate | 20 MHz at 4.5–5.5V; enables fast bulk reads/writes (e.g., 256-byte page write in ~5 ms) |
| Write Endurance | 1,000,000 cycles per memory location; suitable for frequent configuration updates in field-deployed equipment |
| Data Retention | 100 years at 55°C; ensures long-term reliability in unattended industrial or automotive environments |
| Operating Temp | −40°C to +85°C; qualified for industrial-grade operation without derating or thermal management |
Pinout & Package
AT25M01-UUM-T is packaged in an 8-ball WLCSP (Wafer-Level Chip Scale Package), measuring 2.0 mm × 1.6 mm × 0.5 mm, ideal for ultra-compact PCB layouts in wearables and miniaturized modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be driven low before any SPI transaction; high-impedance SO when deasserted |
| SO | Serial Data Output | Tri-state output; data valid on falling SCK edge; high-Z during HOLD or CS high |
| WP | Write-Protect Input | Hardware lock: disables STATUS register writes when low + WPEN=1; configurable via STATUS register |
| GND | Ground Reference | System ground return path; decoupling capacitor required within 1 cm of VCC pin |
| SI | Serial Data Input | Instruction/address/data input; sampled on rising SCK edge; ignored during HOLD |
| SCK | Serial Clock Input | Master-generated clock; defines timing for all SPI transfers; idle polarity depends on Mode 0/3 |
| HOLD | Suspend Control | Pauses ongoing SPI transfer without resetting sequence; SO goes high-Z; resumes on HOLD high + SCK low |
| VCC | Power Supply | 1.7–5.5V supply; requires 100 nF ceramic decoupling capacitor adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| 256-byte Page Write | Reduces write time vs. byte-by-byte: 256 bytes written in one ≤5 ms cycle, improving firmware update efficiency |
| Block Write Protection | Configurable via STATUS register (BP1/BP0) to protect 0%, 25%, 50%, or 100% of memory - prevents accidental overwrites |
| HOLD Pin Functionality | Enables deterministic bus arbitration: pauses SPI without clock stoppage or command restart, critical for multi-master systems |
| Low-Voltage Operation | 1.7V minimum VCC allows direct integration with energy-harvesting circuits or battery-powered sensors down to 1.8V nominal |
| ESD Robustness | >4 kV HBM rating ensures resilience against handling and system-level ESD events in factory or field environments |
Applications
| Industrial Sensor Node | Medical Diagnostic Device |
|---|---|
|
Use Scenario: Storing calibrated sensor offsets, fault logs, and usage counters in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Nonvolatile configuration store interfaced to an ARM Cortex-M0+ MCU via SPI at 10 MHz. Use Value: 1.7V operation extends battery life; 100-year retention ensures calibration integrity across device lifetime. |
Use Scenario: Holding patient-specific calibration profiles and regulatory audit trails in portable ultrasound units. IC Role / Device Role / Timing Role: Secure parameter storage with hardware WP pin tied to system security controller. Use Value: Block protection prevents unauthorized firmware tampering; −40°C to +85°C rating supports clinical deployment. |
| Automotive Body Control Module | Smart Energy Meter |
|
Use Scenario: Recording door actuator counts, seat position memories, and error codes in 12V vehicle subsystems. IC Role / Device Role / Timing Role: SPI EEPROM accessed by 8-bit MCU during startup and runtime diagnostics. Use Value: 20 MHz clock support enables rapid boot-time configuration load; AEC-Q200 qualification confirmed via Microchip documentation. |
Use Scenario: Storing tariff schedules, metering history, and cryptographic keys in utility-grade electricity meters. IC Role / Device Role / Timing Role: Tamper-resistant storage with dual protection: WP pin + STATUS register BP bits. Use Value: 1,000,000 write cycles accommodate daily billing updates over 10+ years; RoHS-compliant WLCSP fits sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95M01-A125 | Same 1 Mbit density and SOIC/WLCSP options, but rated for 5 MHz max at 1.8V (vs. AT25M01-UUM-T's 10 MHz at 1.8V); no HOLD pin | Lacks suspend functionality; unsuitable where dynamic SPI arbitration is required | Select when HOLD is unnecessary and cost sensitivity outweighs performance margin |
| BR24M10FJ-WE2 | I²C interface (not SPI); 1.7–5.5V supply; 1 MHz max clock; 400 kHz typical; no WP/HOLD pins; different pinout | Requires I²C master and pull-up resistors; incompatible with existing SPI firmware stack | Choose only for brownfield I²C designs where SPI-to-I²C bridge is impractical |
Compared with M95M01-A125 and BR24M10FJ-WE2, the AT25M01-UUM-T uniquely combines high-speed SPI (20 MHz @ 5V), HOLD pin for bus arbitration, and flexible hardware/software write protection - making it optimal for new industrial and automotive designs demanding robust, low-latency nonvolatile storage.
Availability
AT25M01-UUM-T is available at Aetrix Electronics and suitable for industrial sensor nodes, medical diagnostic devices, automotive body control modules, smart energy meters, and portable instrumentation requiring stable component supply across extended product lifecycles.
Supply support for AT25M01-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 global semiconductor company specializing in microcontrollers, analog, FPGA, and memory solutions, with ISO 9001-certified manufacturing and broad industrial qualification coverage.
The AT25M01-UUM-T belongs to Microchip's AT25 family of SPI EEPROMs, designed specifically for low-power, high-reliability embedded systems requiring guaranteed data integrity under voltage variation and temperature stress.
FAQ
What is the maximum SPI clock frequency supported by the AT25M01-UUM-T?
The AT25M01-UUM-T supports up to 20 MHz SCK frequency when VCC is 4.5–5.5V, 10 MHz at 2.5–5.5V, and 5 MHz across the full 1.7–5.5V range. These AC specifications are fully characterized and guaranteed per Microchip datasheet 20006226A, ensuring timing compliance in real-world designs using the AT25M01-UUM-T.
Does the AT25M01-UUM-T require external pull-up resistors on its SPI lines?
The AT25M01-UUM-T does not require external pull-ups on SI, SO, or SCK - these are driven actively by the host and device. However, a ≤10 kΩ pull-up on CS is recommended to ensure clean power-up behavior and prevent spurious selection; WP and HOLD may also benefit from weak pull-ups depending on system noise immunity requirements for the AT25M01-UUM-T.
How does write protection work on the AT25M01-UUM-T?
The AT25M01-UUM-T implements dual-layer write protection: hardware via the WP pin (active-low, conditional on WPEN bit), and software via BP1/BP0 bits in the STATUS register to lock 0%, 25%, 50%, or 100% of memory. Both mechanisms operate independently - WP can override STATUS-based protection if enabled, providing defense-in-depth for critical firmware parameters stored in the AT25M01-UUM-T.
Can the AT25M01-UUM-T be used in a 1.8V system?
Yes - the AT25M01-UUM-T is fully specified for 1.7V to 5.5V operation, including reliable 10 MHz SPI communication and 5 ms write cycles at 1.8V. Its low-voltage design eliminates need for level shifters when interfacing with 1.8V microcontrollers, simplifying schematic design and reducing BOM cost for systems using the AT25M01-UUM-T.
What package type is used for the AT25M01-UUM-T?
The AT25M01-UUM-T uses an 8-ball WLCSP (Wafer-Level Chip Scale Package) with 0.5 mm pitch, measuring 2.0 mm × 1.6 mm × 0.5 mm. This ultra-compact, RoHS-compliant package is optimized for space-constrained applications like wearables and handheld instruments where board area is at a premium for the AT25M01-UUM-T.
AT25M01-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:
- SPI
- Clock Frequency:
- 20 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WLCSP
AT25M01-UUM-T FAQ
1.How can I place an order for AT25M01-UUM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25M01-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 AT25M01-UUM-T reliable?
The price and inventory of AT25M01-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 AT25M01-UUM-T is usually 5 days.
3.What payment methods are accepted for AT25M01-UUM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25M01-UUM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25M01-UUM-T?
AT25M01-UUM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25M01-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 AT25M01-UUM-T?
For technical support, including AT25M01-UUM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25M01-UUM-T requirements.
6.How does Aetrix verify that AT25M01-UUM-T is sourced from the original manufacturer or authorized distributors?
All AT25M01-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 AT25M01-UUM-T meets industry standards.
7.What is the process for return or replacement of AT25M01-UUM-T?
All AT25M01-UUM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25M01-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 AT25M01-UUM-T part is unused and in its original packaging.
Return procedure for AT25M01-UUM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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