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Microchip Technology AT25020AN-10SU-1.8
- Part No.:
- AT25020AN-10SU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25020AN-10SU-1.8.pdf
- Description:
- IC EEPROM 2KBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,410
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Product details
Overview
AT25020AN-10SU-1.8 from Microchip Technology (formerly Atmel) is a 2-Kbit SPI serial EEPROM organized as 256 × 8 bits, supporting 1.8 V to 5.5 V operation, 20 MHz clock rate at 5 V, 8-byte page write mode, and hardware/software write protection via WP pin and status register. It serves as nonvolatile configuration storage in microcontroller-based industrial control modules.
For engineers reviewing the AT25020AN-10SU-1.8 datasheet, AT25020AN-10SU-1.8 pinout, AT25020AN-10SU-1.8 application, or AT25020AN-10SU-1.8 equivalent, key selection criteria include low-voltage compatibility (1.8 V min), industrial temperature range (−40°C to +85°C), JEDEC SOIC-8 packaging, and block-level write protection granularity (1/4, 1/2, or full array).
Technical Context
The AT25020AN-10SU-1.8 implements a synchronous SPI slave interface compliant with Modes 0 and 3, using separate SI/SO lines and CS-controlled access. Its internal architecture includes an 8-bit instruction register, status register with BP1/BP0 for nonvolatile block protection, and automatic address increment during page writes.
All operations are self-timed: write cycles complete in ≤5 ms without external erase, and the device powers up in write-disabled state requiring explicit WREN instruction before programming. HOLD pin enables serial communication suspension without sequence reset, while WP pin provides hardware-level write inhibition independent of software commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 words × 8 bits), sufficient for firmware parameter tables or calibration data in space-constrained embedded systems |
| Supply Voltage Range | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V, 2.7 V, 3.3 V, and 5 V logic domains without level shifting |
| Max Clock Frequency | 20 MHz at VCC = 5 V - enables fast configuration loading in high-throughput boot sequences |
| Write Endurance | 1 million cycles - suitable for applications requiring frequent field-updatable settings (e.g., sensor calibration registers) |
| Data Retention | 100 years at 25°C - ensures long-term reliability in unattended infrastructure monitoring devices |
| Operating Temperature | −40°C to +85°C - qualified for industrial automation, automotive body electronics, and outdoor metering equipment |
| Page Write Size | 8 bytes - minimizes bus occupancy during partial memory updates while avoiding overwriting adjacent fields |
Pinout & Package
AT25020AN-10SU-1.8 uses an 8-lead JEDEC SOIC (package code 8S1), 0.150" wide, RoHS-compliant, green plastic gull-wing package.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be low to accept instructions; high impedance on SO when CS is high |
| SCK | Serial Clock | Input-only clock line synchronized to master; defines timing for SI sampling and SO output edges |
| SI | Serial Data Input | MOSI input for op-codes, addresses, and write data; MSB-first transmission required |
| SO | Serial Data Output | MISO output for read data and status register contents; tri-stated when CS is high or HOLD is active |
| GND | Ground Reference | 0 V reference for all digital and analog circuitry; requires low-impedance connection to system ground plane |
| VCC | Power Supply | Single supply input (1.8–5.5 V); decoupling capacitor (0.1 µF) recommended within 10 mm of pin |
| WP | Write Protect | Hardware lock: low disables all write operations regardless of WREN status or status register settings |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting internal address counter; requires SCK low during assertion |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Support | Interoperates with diverse microcontrollers including 68HC11, PIC, ARM Cortex-M, and ESP32 without protocol translation |
| Block Write Protection | Four protection levels (none, 1/4, 1/2, full array) controlled by nonvolatile BP1/BP0 bits in status register |
| Self-Timed Write Cycle | No external erase command needed; internal timing ensures reliable programming completion in ≤5 ms |
| Low Standby Current | 0.1 µA typical at 1.8 V - extends battery life in always-on IoT edge nodes and portable diagnostics tools |
| HOLD Pin Functionality | Enables multi-master arbitration or CPU interrupt handling without losing SPI context or reinitializing address pointer |
Applications
| Industrial PLC I/O Module | Medical Infusion Pump Calibration |
|---|---|
Use Scenario: Storing channel-specific gain/offset coefficients and operational limits across multiple analog input/output channels. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed during power-up initialization and runtime recalibration routines. Use Value: Enables field-replaceable I/O modules to retain calibrated parameters without external backup power or supercapacitors. | Use Scenario: Holding drug delivery rate profiles, safety thresholds, and user-defined dosage presets with tamper-resistant storage. IC Role / Device Role / Timing Role: Secure parameter vault accessed only during authorized service mode; WP pin physically tied to service port interlock. Use Value: Prevents accidental or malicious modification of critical therapy parameters while supporting regulatory traceability requirements. |
| Smart Energy Meter Firmware Patch | Automotive Body Control Unit (BCU) |
Use Scenario: Storing delta patches applied to flash-resident firmware to fix field-reported bugs without full reflash. IC Role / Device Role / Timing Role: Secondary code repository accessed via bootloader during safe update window; verified checksum before execution. Use Value: Reduces OTA update payload size by >90% compared to full image delivery, minimizing radio-on time and energy consumption. | Use Scenario: Retaining seat/mirror position memory, lighting configuration, and door lock preferences across ignition cycles. IC Role / Device Role / Timing Role: Low-power persistent storage updated only on user action or vehicle shutdown sequence. Use Value: Achieves <1 µA total sleep current contribution, meeting OEM requirements for 10-year battery drain budget in parked vehicles. |
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 SOIC-8 package, 2.5–5.5 V operation, 20 MHz max clock | Higher density for complex configuration sets; lacks 1.8 V support | Select when >2 Kbit storage is required and system operates ≥2.5 V |
| AT25020B-SSHL-T | Same 2 Kbit density and 1.8–5.5 V range, but TSSOP-8 (8A2) package and enhanced ESD rating (4 kV HBM) | Smaller footprint and improved robustness in high-noise automotive harness environments | Select when PCB space is constrained or ESD immunity exceeds 2 kV is mandated |
Compared with M95256-WMN6TP and AT25020B-SSHL-T, the AT25020AN-10SU-1.8 offers optimal balance of ultra-low-voltage operation, JEDEC SOIC compatibility, and proven industrial qualification-making it ideal for cost-sensitive, space-tolerant designs where 2 Kbit suffices and 1.8 V interface is mandatory.
Availability
AT25020AN-10SU-1.8 is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, smart metering infrastructure, and automotive body electronics requiring stable component supply across extended product lifecycles.
Supply support for AT25020AN-10SU-1.8 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 broad industrial and automotive qualification programs.
The AT25020AN-10SU-1.8 belongs to Microchip's AT250xxA serial EEPROM family, designed specifically for reliable, low-power nonvolatile data storage in resource-constrained embedded systems operating across wide voltage and temperature ranges.
FAQ
What is the maximum clock frequency supported by AT25020AN-10SU-1.8 at 1.8 V?
The AT25020AN-10SU-1.8 supports up to 5 MHz SCK frequency when operated at 1.8 V, as specified in Table 4 AC Characteristics under the 1.8–5.5 V column. This ensures deterministic timing margins for reliable communication in battery-powered 1.8 V systems without requiring clock throttling.
Does AT25020AN-10SU-1.8 require an external erase command before writing?
No, the AT25020AN-10SU-1.8 does not require an external erase command. All write operations are self-timed and automatically erase the target byte(s) prior to programming. The internal write cycle completes in ≤5 ms, after which the RDY bit in the status register clears to indicate readiness.
How is write protection implemented on AT25020AN-10SU-1.8?
AT25020AN-10SU-1.8 implements dual-layer write protection: hardware-level inhibition via the WP pin (low = all writes blocked), and software-configurable block protection via BP1/BP0 bits in the nonvolatile status register. Both mechanisms operate independently and must be satisfied for successful writes.
Can AT25020AN-10SU-1.8 be used in SPI Mode 3 (CPOL=1, CPHA=1)?
Yes, the AT25020AN-10SU-1.8 explicitly supports SPI Mode 3 per its datasheet features list. In this mode, SCK idles high and data is sampled on the falling edge, enabling interoperability with controllers that default to inverted clock polarity and phase.
What is the standby current consumption of AT25020AN-10SU-1.8 at 1.8 V?
The AT25020AN-10SU-1.8 draws a typical standby current of 0.1 µA at 1.8 V and 25°C (ISB1 parameter in Table 3). This ultra-low quiescent draw makes it suitable for energy-harvesting and coin-cell-powered applications where cumulative leakage must remain below 1 µA.
AT25020AN-10SU-1.8 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25020AN-10SU-1.8 FAQ
1.How can I place an order for AT25020AN-10SU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25020AN-10SU-1.8 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-1.8 reliable?
The price and inventory of AT25020AN-10SU-1.8 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-1.8 is usually 5 days.
3.What payment methods are accepted for AT25020AN-10SU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25020AN-10SU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25020AN-10SU-1.8?
AT25020AN-10SU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25020AN-10SU-1.8 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-1.8?
For technical support, including AT25020AN-10SU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25020AN-10SU-1.8 requirements.
6.How does Aetrix verify that AT25020AN-10SU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT25020AN-10SU-1.8 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-1.8 meets industry standards.
7.What is the process for return or replacement of AT25020AN-10SU-1.8?
All AT25020AN-10SU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT25020AN-10SU-1.8, 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-1.8 part is unused and in its original packaging.
Return procedure for AT25020AN-10SU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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