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Microchip Technology AT25020AN-10SU-2.7
- Part No.:
- AT25020AN-10SU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25020AN-10SU-2.7.pdf
- Description:
- IC EEPROM 2KBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,421
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Product details
Overview
AT25020AN-10SU-2.7 from Microchip Technology (formerly Atmel) is a 2-Kbit SPI serial EEPROM organized as 256 words × 8 bits, operating from 2.7V to 5.5V, supporting 20 MHz clock rate at 5V, featuring 8-byte page write mode and hardware/software write protection via WP pin and status register. It is used in industrial control systems for parameter storage and calibration data retention.
For engineers reviewing the AT25020AN-10SU-2.7 datasheet, AT25020AN-10SU-2.7 pinout, AT25020AN-10SU-2.7 application, or AT25020AN-10SU-2.7 equivalent, key selection considerations include VCC range compatibility (2.7–5.5V), SPI Mode 0/3 support, 1 million write endurance, 100-year data retention, and TSSOP-8 package footprint with HOLD/CS/SCK/SI/SO/WP/GND/VCC interface signals.
Technical Context
The AT25020AN-10SU-2.7 implements a synchronous SPI slave interface with separate SI (input) and SO (output) pins, requiring CS low to initiate communication and supporting MSB-first data transfer. Its internal architecture includes an 8-bit instruction register, status register with BP1/BP0 block protection bits, and automatic address increment during sequential reads.
Write operations require WREN instruction followed by WRITE command; self-timed internal write cycle completes in ≤5 ms. Block write protection covers 1/4, 1/2, or full array based on BP1/BP0 settings, while WP pin provides hardware-level inhibition of all writes when pulled low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit words) - sufficient for firmware configuration, sensor calibration tables, and device ID storage in compact embedded systems. |
| Interface | SPI-compatible, Modes 0 and 3 - interoperable with 6805/68HC11 microcontrollers and most modern MCUs without protocol translation. |
| VCC Range | 2.7V to 5.5V - supports direct integration into 3.3V and 5V logic domains without level-shifting circuitry. |
| Max Clock Rate | 20 MHz at 5V - enables fast programming and read access in time-critical boot or update sequences. |
| Write Endurance | 1 million cycles - ensures reliable field updates across product lifetime in applications like energy metering or industrial HMI. |
| Data Retention | 100 years - guarantees long-term integrity of stored parameters without battery backup or refresh mechanisms. |
| Page Write Size | 8 bytes - reduces write latency versus byte-write-only devices and aligns with common MCU cache line sizes. |
Pinout & Package
AT25020AN-10SU-2.7 is packaged in an 8-lead JEDEC-standard TSSOP (Thin Shrink Small Outline Package), 0.170" wide body, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be low to accept instructions and data; high-Z SO when CS high. |
| SCK | Serial Clock | Input clock synchronized to master; defines timing for SI sampling and SO output transitions per SPI spec. |
| SI | Serial Data Input | Input-only data line for op-codes, addresses, and write data; MSB-first transmission required. |
| SO | Serial Data Output | Output-only data line for read data and status register contents; tri-stated when CS high or HOLD active. |
| GND | Ground Reference | Primary return path for VCC and I/O signals; requires low-impedance PCB connection to minimize noise coupling. |
| VCC | Power Supply | Single supply input (2.7–5.5V); powers internal logic, memory array, and I/O buffers; bypass capacitor recommended. |
| WP | Write Protect | Hardware lock: low = all write instructions ignored; remains effective even during active CS or ongoing write cycle. |
| HOLD | Communication Suspend | Pauses ongoing SPI transaction without resetting sequence; requires SCK low during assertion/deassertion. |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Support | Enables plug-and-play compatibility with diverse host controllers including legacy 68HC11 and modern ARM Cortex-M peripherals. |
| Block Write Protection | Four configurable protection levels (none, 1/4, 1/2, full array) via nonvolatile BP1/BP0 bits - prevents accidental overwrite of critical firmware or calibration zones. |
| Self-timed Write Cycle | No external erase step needed; internal timing ensures completion within 5 ms - simplifies firmware design and eliminates need for polling delays beyond RDSR status check. |
| Low Standby Current | 0.2 µA typical at 2.7V - extends battery life in portable or energy-harvesting applications where EEPROM remains powered but inactive. |
| HOLD Pin Functionality | Allows multi-device SPI bus sharing by suspending AT25020AN-10SU-2.7 communication mid-transfer without losing address or state context. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during power-up and runtime reconfiguration via SPI from main controller. Use Value: Ensures deterministic startup behavior and field-updatable logic without requiring external battery or supercapacitor backup. | Use Scenario: Retaining sensor offset/gain coefficients and patient-specific therapy profiles in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter store interfaced to safety-certified MCU over isolated SPI bus. Use Value: Meets IEC 62304 Class C software requirements for data integrity and supports audit-ready calibration traceability. |
| Smart Energy Meter Firmware Settings | Automotive Body Control Module NVM |
Use Scenario: Holding tariff schedules, demand-response flags, and meter serial number in ANSI C12.22-compliant electricity meters operating across wide temperature ranges. IC Role / Device Role / Timing Role: Industrial-grade EEPROM providing guaranteed 100-year retention under thermal cycling and voltage transients. Use Value: Eliminates need for redundant NVM or periodic recalibration, reducing BOM cost and field service frequency. | Use Scenario: Storing seat position memory, mirror presets, and lighting configuration in automotive BCMs qualified to AEC-Q100 Grade 2. IC Role / Device Role / Timing Role: Automotive-qualified serial EEPROM with extended temperature range (−40°C to +85°C) and robust ESD immunity. Use Value: Enables personalized user experience while meeting OEM functional safety and longevity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95256-WMN6TP | 256-Kbit capacity, same 8-pin TSSOP-8 package, 2.5–5.5V VCC, 20 MHz max clock, but lacks HOLD pin. | Higher density suitable for larger configuration sets; absence of HOLD limits multi-device SPI bus arbitration capability. | Select when memory expansion is prioritized over bus-sharing flexibility and HOLD functionality is unused in target design. |
| BR25L20FJ-WE2 | 2-Kbit SPI EEPROM, same VCC range (2.7–5.5V), 10 MHz max clock, 8-pin SOP-J8 package (not pin-compatible), includes built-in error detection. | Lower speed limits throughput in high-frequency update scenarios; different package requires PCB redesign; error detection adds reliability layer. | Choose when enhanced data integrity verification is required and layout revision is acceptable for improved fault coverage. |
Compared with M95256-WMN6TP and BR25L20FJ-WE2, AT25020AN-10SU-2.7 offers balanced performance with HOLD support for flexible SPI bus management, proven 20 MHz operation at 5V, and exact pinout compatibility with existing TSSOP-8 layouts-making it optimal for drop-in replacement in industrial and medical designs requiring timing predictability and bus arbitration.
Availability
AT25020AN-10SU-2.7 is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, smart energy meters, and automotive body electronics requiring stable component supply and long-term manufacturing continuity.
Supply support for AT25020AN-10SU-2.7 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 components, and nonvolatile memory solutions, with a focus on reliability, longevity, and embedded system integration.
The AT25020AN-10SU-2.7 belongs to Microchip's AT250xxA serial EEPROM family, designed specifically for low-power, low-voltage embedded applications demanding high endurance, long data retention, and robust SPI interface compliance.
FAQ
What is the memory organization of the AT25020AN-10SU-2.7?
The AT25020AN-10SU-2.7 contains 2048 bits of serial EEPROM memory organized as 256 words × 8 bits. This structure supports byte-aligned read/write operations and efficient addressing using 8-bit addresses (A7–A0), with automatic rollover during sequential reads. The AT25020AN-10SU-2.7 uses this fixed layout to ensure deterministic access timing and compatibility with standard SPI EEPROM drivers.
Does the AT25020AN-10SU-2.7 support both SPI Mode 0 and Mode 3?
Yes, the AT25020AN-10SU-2.7 explicitly supports SPI Modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1), as confirmed in its official datasheet. The AT25020AN-10SU-2.7 operates as a slave device with SCK always an input, and its timing diagrams validate correct sampling on first edge and output on second edge for both modes. Mode 0 is fully documented in the datasheet.
What is the maximum clock frequency supported by the AT25020AN-10SU-2.7 at 3.3V?
At 3.3V, the AT25020AN-10SU-2.7 supports up to 10 MHz SCK frequency, as specified in Table 4 of the datasheet under "2.7–5.5V" voltage column. This is lower than its 20 MHz rating at 5V but ensures reliable timing margins and signal integrity in 3.3V systems. The AT25020AN-10SU-2.7 maintains full functionality-including page write and status register access-at this speed.
How does the write protection mechanism work on the AT25020AN-10SU-2.7?
The AT25020AN-10SU-2.7 implements dual-layer write protection: hardware via the WP pin (low = all writes inhibited), and software via BP1/BP0 bits in the status register (configurable 0%, 25%, 50%, or 100% array protection). Both mechanisms operate independently; WP takes precedence during active CS. The AT25020AN-10SU-2.7 requires WREN before any write, and WRDI resets the latch-ensuring intentional, controlled updates.
Is the AT25020AN-10SU-2.7 qualified for automotive applications?
No, the AT25020AN-10SU-2.7 is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. While it may function in some automotive environments, Microchip explicitly states in the datasheet disclaimer that "Atmel's products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life." For automotive use, select Microchip's automotive-grade variants such as the AT25020B-MAHL-T.
AT25020AN-10SU-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25020AN-10SU-2.7 FAQ
1.How can I place an order for AT25020AN-10SU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25020AN-10SU-2.7 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 AT25020AN-10SU-2.7 reliable?
The price and inventory of AT25020AN-10SU-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25020AN-10SU-2.7 is usually 5 days.
3.What payment methods are accepted for AT25020AN-10SU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25020AN-10SU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25020AN-10SU-2.7?
AT25020AN-10SU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25020AN-10SU-2.7 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 AT25020AN-10SU-2.7?
For technical support, including AT25020AN-10SU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25020AN-10SU-2.7 requirements.
6.How does Aetrix verify that AT25020AN-10SU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT25020AN-10SU-2.7 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 AT25020AN-10SU-2.7 meets industry standards.
7.What is the process for return or replacement of AT25020AN-10SU-2.7?
All AT25020AN-10SU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT25020AN-10SU-2.7, 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 AT25020AN-10SU-2.7 part is unused and in its original packaging.
Return procedure for AT25020AN-10SU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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