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Microchip Technology AT25020AN-10SI-2.7
- Part No.:
- AT25020AN-10SI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25020AN-10SI-2.7.pdf
- Description:
- IC EEPROM 2KBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,292
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Product details
Overview
AT25020AN-10SI-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 with 20 MHz clock rate at 5V, 8-byte page write capability, and hardware/software write protection. It serves as nonvolatile configuration storage in microcontroller-based industrial control modules requiring reliable data retention over 100 years.
For engineers reviewing the AT25020AN-10SI-2.7 datasheet, AT25020AN-10SI-2.7 pinout, AT25020AN-10SI-2.7 application, or AT25020AN-10SI-2.7 equivalent, key selection criteria include VCC range compatibility (2.7–5.5V), SOIC-8 package footprint, SPI Mode 0/3 support, block write protection granularity (1/4, 1/2, full array), and automotive-grade temperature operation (−40°C to +85°C).
Technical Context
The AT25020AN-10SI-2.7 implements a synchronous SPI slave interface with dedicated SI/SO pins, CS-controlled selection, and HOLD/HP for communication suspension without reset. Its status register (BP1/BP0/WEN/RDY) enables programmable block protection and real-time write-cycle monitoring.
It uses self-timed internal write cycles (≤5 ms), requires WREN before WRITE, supports MSB-first 8-bit op-code + address + data framing, and maintains high-impedance SO during CS high or HOLD active states - all compliant with standard SPI peripheral interface protocols for 68HC11/6805-class MCUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8-bit words) - sufficient for firmware calibration tables or device ID storage in compact embedded systems |
| Supply Voltage Range | 2.7V to 5.5V - supports direct integration with 3.3V and 5V logic domains without level-shifting |
| Max Clock Frequency | 20 MHz at VCC = 5V - enables fast configuration reads during MCU boot sequences |
| Write Endurance | 1 million cycles - suitable for logging applications with frequent parameter updates |
| Data Retention | 100 years at 25°C - ensures long-term reliability in unattended industrial deployments |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade environmental stress without derating |
| Page Write Size | 8 bytes - balances programming speed and granularity for partial memory updates |
Pinout & Package
AT25020AN-10SI-2.7 is supplied in an 8-lead JEDEC SOIC (8S1) package measuring 5.0 mm × 3.99 mm × 1.75 mm, compatible with standard surface-mount reflow processes and PCB footprints for 8-pin SOIC devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be low to accept SI data and drive SO output; high-Z SO when high |
| SCK | Serial Clock | Input-only clock synchronized to master; defines timing for SI sampling and SO output edges |
| SI | Serial Data Input | Accepts op-codes, addresses, and write data; ignored during HOLD or CS high |
| SO | Serial Data Output | Drives read data MSB-first; enters high-impedance state when CS high or HOLD active |
| GND | Ground Reference | Return path for VCC and all I/O signals; requires low-impedance PCB plane connection |
| VCC | Power Supply | Single 2.7–5.5V supply powering core logic and I/O buffers; bypass capacitor required |
| WP | Write Protect | Hardware lock: low disables all writes regardless of WREN status or status register settings |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting address counter; requires SCK low to assert/deassert |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Compatibility | Supports both CPOL=0/CPHA=0 and CPOL=1/CPHA=1 masters - eliminates interface mismatch in mixed-controller designs |
| Block Write Protection | Four protection levels (none, 1/4, 1/2, full array) controlled via nonvolatile BP1/BP0 bits - prevents accidental overwrite of critical firmware sectors |
| Hardware + Software Write Lock | WP pin and WREN/WRDI instructions provide dual-layer data integrity - essential for fail-safe configuration storage |
| Self-Timed Write Cycle | No external erase step required; internal timing completes write in ≤5 ms - simplifies firmware driver implementation |
| Automotive-Grade Qualification | Rated for −40°C to +85°C operation with lead-free/halogen-free packaging - meets AEC-Q100 stress requirements for industrial transport systems |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing sensor offset values, PID tuning parameters, and user-defined operational limits in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during power-up and runtime via SPI by ARM Cortex-M4 host MCU. Use Value: Ensures deterministic system behavior after power loss; 100-year retention avoids recalibration during 10+ year equipment lifecycle. |
Use Scenario: Holding factory-trimmed ADC gain coefficients and patient-specific therapy profiles in portable infusion pumps certified to IEC 60601-1. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter store interfaced to safety-critical microcontroller via isolated SPI bus. Use Value: Block write protection prevents unauthorized modification of life-sustaining dosage algorithms during field servicing. |
| Automotive Body Control Module | Smart Energy Meter Firmware Settings |
Use Scenario: Saving door lock/unlock history, mirror position presets, and lighting configuration in 12V vehicle body control units. IC Role / Device Role / Timing Role: SPI EEPROM co-located with Infineon AURIX TC2xx MCU; accessed during CAN message processing for feature personalization. Use Value: −40°C to +85°C rating ensures reliable operation under hood temperature extremes; WP pin hardwires to chassis ground for permanent protection. |
Use Scenario: Storing tariff schedules, meter serial number, and cryptographic keys in ANSI C12.22-compliant smart electricity meters deployed in utility substations. IC Role / Device Role / Timing Role: Trusted configuration vault accessed only by secure bootloader during firmware update verification. Use Value: 1M endurance supports daily firmware patching over 27 years; SOIC-8 package allows conformal coating for outdoor humidity resistance. |
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, 5V-only (4.5–5.5V), 20 MHz max, same SOIC-8 package | Higher density for extended parameter sets; lacks 2.7V operation and HOLD pin | Select when >2Kbit storage needed and system operates strictly at 5V with no suspend requirement |
| BR25G256FJ-3GE2 | 256 Kbit, 1.7–5.5V, 20 MHz, built-in error correction (ECC), TSSOP-8 package | Includes single-bit ECC for enhanced data integrity; different footprint requires PCB redesign | Choose for mission-critical applications where bit-flip immunity outweighs footprint change cost |
Compared with M95256-WMN6TP and BR25G256FJ-3GE2, the AT25020AN-10SI-2.7 offers optimal balance of low-voltage flexibility (2.7V start), proven industrial reliability, SOIC-8 drop-in compatibility, and HOLD functionality - making it ideal for cost-sensitive, space-constrained 2Kbit storage where robustness and design reuse are priorities.
Availability
AT25020AN-10SI-2.7 is available at Aetrix Electronics and suitable for industrial PLCs, medical infusion pumps, automotive body control modules, and smart energy meters requiring stable component supply across multi-year production cycles.
Supply support for AT25020AN-10SI-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 memory solutions, with a focus on embedded control and connectivity.
The AT25020AN-10SI-2.7 belongs to Microchip's legacy Atmel SPI EEPROM product line, designed specifically for robust, low-power nonvolatile data storage in industrial, automotive, and medical systems demanding long-term reliability and wide voltage operation.
FAQ
What is the memory organization of the AT25020AN-10SI-2.7?
The AT25020AN-10SI-2.7 contains 2048 bits of serial EEPROM memory organized as 256 words × 8 bits. This structure supports byte-level random access and sequential reads/writes, with automatic address incrementing during continuous operations. The AT25020AN-10SI-2.7 uses a single 8-bit instruction register and MSB-first data framing aligned with standard SPI peripheral interfaces.
Does the AT25020AN-10SI-2.7 support both SPI Mode 0 and Mode 3?
Yes, the AT25020AN-10SI-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-10SI-2.7 operates as a slave device with dedicated SI and SO pins, and its timing diagrams validate compatibility with both modes across the full 2.7–5.5V supply range.
How does write protection work on the AT25020AN-10SI-2.7?
The AT25020AN-10SI-2.7 implements dual-layer write protection: hardware via the WP pin (low = all writes disabled), and software via status register bits BP1/BP0 that configure 1/4, 1/2, or full-array block protection. The AT25020AN-10SI-2.7 also requires WREN instruction before any write, and WRDI resets the write-enable latch - ensuring multiple safeguards against unintended modifications.
What is the maximum clock frequency for the AT25020AN-10SI-2.7 at 3.3V?
At VCC = 3.3V, the AT25020AN-10SI-2.7 supports up to 10 MHz SCK frequency, as specified in Table 4 of its datasheet under the 2.7–5.5V voltage column. This is lower than its 20 MHz maximum at 5V but fully sufficient for most configuration and calibration data transfers in 3.3V embedded systems.
Is the AT25020AN-10SI-2.7 qualified for automotive applications?
Yes, the AT25020AN-10SI-2.7 is explicitly rated for automotive-grade extended temperature operation (−40°C to +85°C) and offered in lead-free/halogen-free variants. While not AEC-Q100 certified as a standalone part, its qualification aligns with automotive body electronics requirements, and it is widely deployed in automotive body control modules and infotainment subsystems.
AT25020AN-10SI-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-10SI-2.7 FAQ
1.How can I place an order for AT25020AN-10SI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25020AN-10SI-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-10SI-2.7 reliable?
The price and inventory of AT25020AN-10SI-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-10SI-2.7 is usually 5 days.
3.What payment methods are accepted for AT25020AN-10SI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25020AN-10SI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25020AN-10SI-2.7?
AT25020AN-10SI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25020AN-10SI-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-10SI-2.7?
For technical support, including AT25020AN-10SI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25020AN-10SI-2.7 requirements.
6.How does Aetrix verify that AT25020AN-10SI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT25020AN-10SI-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-10SI-2.7 meets industry standards.
7.What is the process for return or replacement of AT25020AN-10SI-2.7?
All AT25020AN-10SI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT25020AN-10SI-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-10SI-2.7 part is unused and in its original packaging.
Return procedure for AT25020AN-10SI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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