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Microchip Technology AT25020B-MAHL-T
- Part No.:
- AT25020B-MAHL-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT25020B-MAHL-T.pdf
- Description:
- IC EEPROM 2KBIT SPI 20MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,873
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Product details
Overview
AT25020B-MAHL-T from Microchip Technology is a 2-Kbit SPI Serial EEPROM organized as 256 × 8 bits, operating from 1.8V to 5.5V with industrial temperature range (−40°C to +85°C), 20 MHz max clock rate at 5V, and hardware/software write protection via WP pin and STATUS register. It serves as nonvolatile configuration storage in microcontroller-based embedded systems requiring low-power, reliable data retention.
For engineers reviewing the AT25020B-MAHL-T datasheet, AT25020B-MAHL-T pinout, AT25020B-MAHL-T application, or AT25020B-MAHL-T equivalent, key selection criteria include SPI Mode 0/3 compatibility, 8-byte page write capability, block-level write protection (1/4, 1/2, or full array), 5 ms max self-timed write cycle, and RoHS-compliant 8-lead TSSOP packaging.
Technical Context
The AT25020B-MAHL-T implements a synchronous SPI slave interface with fixed MSB-first data framing, rising-edge input sampling (SI), and falling-edge output timing (SO). Its internal architecture includes a STATUS register with BP1/BP0 bits for nonvolatile block protection, WEL latch control, and RDY/BSY flag for polling-based write completion detection.
It supports dual write-protection mechanisms: hardware-level inhibition via the dedicated WP pin (active-low, immediate effect on pending writes) and software-configurable array segmentation via STATUS register writes. The HOLD pin enables pause/resume of serial communication without resetting the instruction sequence or affecting ongoing internal write cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbits (256 words × 8 bits); sufficient for firmware calibration tables, device ID, or small configuration sets |
| Supply Voltage Range | 1.8V to 5.5V; enables direct interfacing with 1.8V, 3.3V, and 5V logic domains without level shifting |
| Max Clock Frequency | 20 MHz at VCC = 4.5–5.5V; supports high-throughput read/write in time-critical boot or logging sequences |
| Write Cycle Time | ≤5 ms maximum; deterministic erase-and-program latency enables predictable system-level timing budgets |
| Endurance & Retention | 1,000,000 write cycles / 100 years data retention at 55°C; meets long-life industrial field deployment requirements |
| ESD Protection | >4,000 V HBM; robust against handling and board-level electrostatic discharge events |
| Operating Temperature | −40°C to +85°C; qualified for industrial-grade environmental stress without derating |
Pinout & Package
AT25020B-MAHL-T is packaged in an 8-lead Thin Shrink Small Outline Package (TSSOP), pin-compatible with SOIC, UDFN, and VFBGA variants. The package is RoHS-compliant, halide-free, and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be driven low before SCK edges to initiate SPI transaction; requires pull-up resistor (≤10 kΩ) for robust power-up behavior |
| SO | Serial Data Output | Tri-state open-drain output; data valid on falling edge of SCK; high-impedance when CS high or HOLD active |
| WP | Write-Protect | Hardware lock; low state inhibits all write commands immediately (except STATUS register changes if BP bits permit) |
| GND | Ground Reference | System ground return path for VCC supply and signal references; connects to PCB ground plane |
| SI | Serial Data Input | CMOS input; latches instruction/address/data on rising edge of SCK; MSB-first framing |
| SCK | Serial Clock Input | Asynchronous master-generated clock; defines SPI Mode 0 (idle low) or Mode 3 (idle high) timing relationship |
| HOLD | Suspend Control | Pauses ongoing SPI transfer without resetting state machine; requires SCK low to assert/deassert; no effect on active write cycle |
| VCC | Power Supply | 1.8–5.5V input; monotonically ramping required; POR circuit enforces 100 µs delay before first command acceptance |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Support | Enables interoperability with diverse MCU SPI peripherals without protocol translation or glue logic |
| 8-Byte Page Write | Reduces write overhead vs. byte-write; allows burst programming of up to 8 bytes per command with single address setup |
| Nonvolatile Block Protection | BP1/BP0 bits in STATUS register retain protection settings across power cycles, eliminating reconfiguration at boot |
| Hardware WP + Software Protection | Dual-layer security: WP pin provides physical lockout; STATUS register enables fine-grained, field-updatable segment control |
| Self-Timed Internal Write | Removes need for external write timing control; host polls RDY/BSY bit or uses fixed 5 ms timeout for completion detection |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and linearization tables in programmable logic controllers (PLCs) and smart transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during power-on initialization and runtime correction lookups. Use Value: Enables field-replaceable sensor modules with persistent calibration data independent of host MCU firmware updates. | Use Scenario: Holding patient-specific therapy parameters, device serial number, and usage logs in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for regulatory-compliant audit trails and safety-critical settings. Use Value: Meets IEC 62304 data integrity requirements via hardware WP pin lockout and 1M-cycle endurance for frequent log updates. |
| Automotive Body Control Module | IoT Edge Node Identity |
Use Scenario: Saving user preferences (mirror position, seat memory), fault codes, and adaptive learning values in 12V automotive ECUs. IC Role / Device Role / Timing Role: Low-voltage EEPROM supporting 1.8V–5.5V operation across battery voltage fluctuations (9–16V with regulator). Use Value: Guarantees reliable write operation down to 1.8V supply, preventing corruption during cold-crank or brown-out conditions. | Use Scenario: Storing unique device identifiers (MAC, UUID), TLS certificate keys, and firmware version stamps in battery-powered wireless sensors. IC Role / Device Role / Timing Role: Ultra-low standby current (0.1 µA at 1.8V) extends battery life while preserving secure identity data. Use Value: Achieves >10-year shelf life on coin cell with 100-year data retention, eliminating need for periodic refresh or backup power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95256-DRMN6TP/K | 256-Kbit capacity (32× larger), same 1.8–5.5V range, but 20 MHz max only at 5V; supports additional SPI modes including Mode 1 | Higher density for extended parameter sets; not drop-in due to different memory map and STATUS register layout | Select when future scalability or multi-mode SPI host compatibility is required; verify address decoding and protection scheme alignment |
| CAT25256VI-GT3 | 256-Kbit, 1.8–5.5V, 20 MHz at 5V; includes enhanced ESD (8 kV HBM) and deeper sleep mode (20 nA ISB) | Superior noise immunity and ultra-low power; lacks HOLD pin, removing suspend capability | Prefer for battery-sensitive designs needing lowest possible quiescent current; avoid if hold/resume functionality is mandatory |
Compared with M95256-DRMN6TP/K and CAT25256VI-GT3, the AT25020B-MAHL-T offers optimal balance of proven reliability, compact 2-Kbit footprint, full hardware/software write protection, and HOLD functionality - making it ideal for cost-constrained, space-limited industrial and medical applications where precise capacity and feature set alignment matter more than raw density or ultra-low ISB.
Availability
AT25020B-MAHL-T is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and IoT edge node identity applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AT25020B-MAHL-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 Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The AT25020B-MAHL-T belongs to Microchip's AT25xxx-B series of SPI Serial EEPROMs, engineered specifically for robust, low-voltage, industrial-grade nonvolatile storage in resource-constrained embedded systems.
FAQ
What is the memory organization of the AT25020B-MAHL-T?
The AT25020B-MAHL-T contains 2,048 bits of EEPROM memory organized as 256 words × 8 bits. This structure supports byte-aligned reads and writes, with address space spanning 0x00 to 0xFF. The AT25020B-MAHL-T uses a simple linear addressing scheme compatible with standard SPI EEPROM drivers and does not require bank switching or extended address bytes.
Does the AT25020B-MAHL-T support both SPI Mode 0 and Mode 3?
Yes, the AT25020B-MAHL-T explicitly supports SPI Modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1), as confirmed in its official datasheet. In both modes, data is sampled on the rising edge of SCK and output on the falling edge. The AT25020B-MAHL-T requires matching SCK idle polarity before and after CS assertion to maintain synchronization.
How does write protection work on the AT25020B-MAHL-T?
The AT25020B-MAHL-T implements dual write protection: hardware-level inhibition via the WP pin (low = all writes blocked), and software-configurable block protection via BP1/BP0 bits in the STATUS register (00 = no protection, 01 = 1/4 array, 10 = 1/2 array, 11 = full array). Both mechanisms operate independently and can be used simultaneously for defense-in-depth data security.
What is the maximum write cycle time for the AT25020B-MAHL-T?
The AT25020B-MAHL-T has a maximum self-timed write cycle time of 5 ms across its full 1.8V–5.5V supply range and −40°C to +85°C temperature range. This value includes internal erase and program phases. Host systems may poll the RDY/BSY bit in the STATUS register or implement a fixed 5 ms delay after issuing a WRITE or WRSR command to ensure completion before subsequent access.
Is the AT25020B-MAHL-T RoHS-compliant and halide-free?
Yes, the AT25020B-MAHL-T is RoHS-compliant, lead-free, and halide-free, as stated in the official Microchip datasheet (DS20006251A). The "-MAHL-T" suffix denotes the 8-lead TSSOP package with green (environmentally compliant) material specifications, meeting JEDEC J-STD-020 moisture sensitivity level 3 requirements.
AT25020B-MAHL-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 20 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (2x3)
AT25020B-MAHL-T FAQ
1.How can I place an order for AT25020B-MAHL-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25020B-MAHL-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 AT25020B-MAHL-T reliable?
The price and inventory of AT25020B-MAHL-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25020B-MAHL-T is usually 5 days.
3.What payment methods are accepted for AT25020B-MAHL-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25020B-MAHL-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25020B-MAHL-T?
AT25020B-MAHL-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25020B-MAHL-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 AT25020B-MAHL-T?
For technical support, including AT25020B-MAHL-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25020B-MAHL-T requirements.
6.How does Aetrix verify that AT25020B-MAHL-T is sourced from the original manufacturer or authorized distributors?
All AT25020B-MAHL-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 AT25020B-MAHL-T meets industry standards.
7.What is the process for return or replacement of AT25020B-MAHL-T?
All AT25020B-MAHL-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25020B-MAHL-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 AT25020B-MAHL-T part is unused and in its original packaging.
Return procedure for AT25020B-MAHL-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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