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Microchip Technology AT25020AN-10SI-2.7-T
- Part No.:
- AT25020AN-10SI-2.7-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25020AN-10SI-2.7-T.pdf
- Description:
- IC EEPROM 2KBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,606
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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 max 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 low-voltage data retention.
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 (2.7–5.5V), SPI Mode 0/3 compatibility, 1M write endurance, 100-year data retention, and TSSOP-8 package footprint for space-constrained PCBs.
Technical Context
The AT25020AN-10SI-2.7 implements a synchronous serial peripheral interface with dedicated SI/SO pins, operates exclusively as a slave device, and uses MSB-first data framing. Its status register (BP1/BP0) enables configurable block write protection across 1/4, 1/2, or full memory array segments.
Internal self-timed write cycles complete in ≤5 ms with no external erase step required; write enable/disable instructions (WREN/WRDI) and hardware WP pin provide dual-layer data integrity control. HOLD pin suspends ongoing SPI transfers without resetting sequence state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8-bit words) - fixed addressable space for firmware parameter storage |
| Supply Voltage | 2.7V to 5.5V - supports direct interfacing with 3.3V and 5V microcontrollers without level shifting |
| Max Clock Rate | 20 MHz at 5V - enables fast configuration reads during system boot or runtime updates |
| Write Endurance | 1 million cycles - sufficient for daily calibration logging over 27+ years |
| Data Retention | 100 years - ensures long-term reliability in unpowered industrial deployments |
| Page Write Size | 8 bytes - minimizes SPI transaction overhead while limiting write latency per operation |
| Operating Temp | −40°C to +85°C - qualified for industrial temperature range applications |
Pinout & Package
AT25020AN-10SI-2.7 is housed in an 8-lead JEDEC-standard TSSOP package (8A2), 3.0 mm × 4.4 mm body, 0.65 mm pitch, lead-free/halogen-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be low to accept SPI commands and data |
| SCK | Serial Clock | Input clock synchronized to master MCU; defines timing for SI/SO data sampling |
| SI | Serial Data Input | Receives op-codes, addresses, and write data from MCU; MSB-first protocol |
| SO | Serial Data Output | Drives read data and status register contents; high-impedance when CS high |
| GND | Ground Reference | Return path for all digital and power currents; requires low-impedance PCB connection |
| VCC | Power Supply | 2.7–5.5V supply input; decoupling capacitor (0.1 µF) required near pin |
| WP | Write Protect | Hardware lock: low = inhibit all writes regardless of WREN status or status register settings |
| HOLD | Communication Suspend | Pauses active SPI transfer without resetting internal address counter or command state |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Support | Compatible with both common MCU SPI configurations (CPOL=0/CPHA=0 and CPOL=1/CPHA=1) |
| Block Write Protection | Status register BP1/BP0 bits allow selective locking of 1/4, 1/2, or entire 256-word array |
| Self-timed Write Cycle | No external timing control needed; internal logic completes write in ≤5 ms and auto-clears WEN bit |
| Low Standby Current | 0.2 µA typical at 2.7V - extends battery life in always-on sensor nodes |
| HOLD Pin Functionality | Enables multi-master arbitration or MCU interrupt handling without losing SPI context |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Storing calibrated sensor offsets and fault history logs in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via SPI during power-up and runtime diagnostics. Use Value: Enables field-updatable calibration without firmware reflash; 100-year retention prevents data loss during extended equipment downtime. | Use Scenario: Holding door lock actuator timing profiles and seat position presets in 12V automotive BCMs. IC Role / Device Role / Timing Role: SPI-connected parameter store interfaced to 8-bit or 32-bit automotive MCUs (e.g., PIC16F, S32K). Use Value: WP pin provides hardware-level protection against corruption during vehicle jump-start transients or ESD events. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Recording drug delivery logs and user-defined dosage limits in Class II medical devices with battery backup. IC Role / Device Role / Timing Role: Fail-safe configuration EEPROM accessed during safety-critical initialization sequences. Use Value: 1M write cycles support >10,000 dose adjustments over product lifetime; −40°C to +85°C rating covers clinical and transport environments. | Use Scenario: Storing tariff schedules, metering constants, and tamper-event timestamps in ANSI C12.20-compliant utility meters. IC Role / Device Role / Timing Role: Secure parameter storage with dual protection (WP pin + software WRSR) against unauthorized firmware modification. Use Value: Block protection allows separate locking of revenue-critical registers while permitting field updates to display language or communication settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95256-DWDW | 256 Kbit capacity, 5V-only supply (4.5–5.5V), same TSSOP-8 package | Higher density for complex configuration sets; not suitable for 2.7–3.6V systems | Select when >2 Kbit storage is required and system operates strictly at 5V |
| BR25G256FJ-3GE2 | 256 Kbit, 1.7–5.5V operation, built-in error correction (ECC), 10M write endurance | Enhanced reliability for mission-critical data; larger footprint (8-pin SOP-J8) | Choose for safety-critical applications needing ECC and extended endurance beyond 1M cycles |
Compared with M95256-DWDW and BR25G256FJ-3GE2, the AT25020AN-10SI-2.7 offers optimal balance of low-voltage compatibility, compact TSSOP-8 footprint, and proven industrial reliability for 2-Kbit parameter storage-without over-provisioning memory or increasing BOM cost.
Availability
AT25020AN-10SI-2.7 is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, medical infusion devices, and smart energy metering requiring stable component supply across extended temperature and low-voltage operating conditions.
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 devices, and memory solutions, with a focus on embedded control and connectivity.
The AT25020AN-10SI-2.7 belongs to Microchip's legacy AT25xxx SPI EEPROM family, designed specifically for robust, low-power nonvolatile data storage in resource-constrained industrial and automotive subsystems.
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. Each word is individually addressable via a 8-bit address field (A7–A0), with the most significant address bit (A8) embedded in the READ/WRITE op-code. This structure supports efficient byte-level access for configuration and calibration data storage in AT25020AN-10SI-2.7-based designs.
Does the AT25020AN-10SI-2.7 support SPI Mode 3 operation?
Yes, the AT25020AN-10SI-2.7 explicitly supports both SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1), as confirmed in its official datasheet. This dual-mode compatibility allows seamless integration with diverse microcontrollers including legacy 68HC11 derivatives and modern ARM Cortex-M devices without requiring SPI peripheral reconfiguration.
How does the 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 inhibited), and software via status register bits BP1/BP0. These bits configure protection for 0%, 25%, 50%, or 100% of the 256-word array. Both mechanisms must be satisfied for a write to proceed-ensuring robust data integrity in AT25020AN-10SI-2.7 deployments.
What is the maximum clock frequency supported by the AT25020AN-10SI-2.7 at 3.3V?
At 3.3V supply, the AT25020AN-10SI-2.7 supports up to 10 MHz SCK frequency, as specified in Table 4 AC Characteristics for the 2.7–5.5V voltage range. This is lower than its 20 MHz maximum at 5V but fully compatible with standard 3.3V microcontroller SPI peripherals operating at common bus speeds.
Can the AT25020AN-10SI-2.7 be used in automotive applications?
Yes, the AT25020AN-10SI-2.7 is rated for industrial temperature range (−40°C to +85°C) and qualified as automotive-grade per the datasheet's "Automotive Grade, Extended Temperature and Lead-free/Halogen-free Devices" statement. Its TSSOP-8 package, 2.7–5.5V operation, and robust write protection make it suitable for body control units, infotainment configuration storage, and other non-safety-critical automotive subsystems.
AT25020AN-10SI-2.7-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for AT25020AN-10SI-2.7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25020AN-10SI-2.7-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 AT25020AN-10SI-2.7-T reliable?
The price and inventory of AT25020AN-10SI-2.7-T 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-T is usually 5 days.
3.What payment methods are accepted for AT25020AN-10SI-2.7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25020AN-10SI-2.7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25020AN-10SI-2.7-T?
AT25020AN-10SI-2.7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25020AN-10SI-2.7-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 AT25020AN-10SI-2.7-T?
For technical support, including AT25020AN-10SI-2.7-T 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-T requirements.
6.How does Aetrix verify that AT25020AN-10SI-2.7-T is sourced from the original manufacturer or authorized distributors?
All AT25020AN-10SI-2.7-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 AT25020AN-10SI-2.7-T meets industry standards.
7.What is the process for return or replacement of AT25020AN-10SI-2.7-T?
All AT25020AN-10SI-2.7-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25020AN-10SI-2.7-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 AT25020AN-10SI-2.7-T part is unused and in its original packaging.
Return procedure for AT25020AN-10SI-2.7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT25020AN-10SI-2.7-T Tags
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