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Microchip Technology AT25020-10PI-2.7
- Part No.:
- AT25020-10PI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT25020-10PI-2.7.pdf
- Description:
- IC EEPROM 2KBIT SPI 3MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,034
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Product details
Overview
AT25020-10PI-2.7 from Atmel (now Microchip) is a 2-kbit SPI serial EEPROM organized as 256 words × 8 bits, operating from 2.7V to 5.5V with 3.0 MHz max clock rate at 5V, 10 ms max self-timed write cycle, and block write protection covering 1/4, 1/2, or entire memory array-used in industrial control panels for firmware parameter storage.
For engineers reviewing the AT25020-10PI-2.7 datasheet, AT25020-10PI-2.7 pinout, AT25020-10PI-2.7 application, or AT25020-10PI-2.7 equivalent, key selection criteria include SPI Mode 0/3 compatibility, PDIP-8 package footprint, 2.7V–5.5V supply range, 1M endurance cycles, and hardware/software write protection via WP pin and status register.
Technical Context
The AT25020-10PI-2.7 implements a synchronous SPI slave interface with dedicated SI/SO pins, MSB-first data transfer, and op-code–driven command set including WREN, WRITE, READ, RDSR, and WRSR. It requires CS low to initiate communication and supports HOLD pin suspension without sequence reset.
Its internal architecture includes an 8-bit instruction register, nonvolatile BP1/BP0 status bits controlling four protection levels, and automatic address increment during sequential read. Write operations are inhibited when WP is low or WEN bit = 0, and only RDSR is accepted during active write cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8), sufficient for calibration tables or device configuration in space-constrained embedded systems |
| Supply Voltage | 2.7V to 5.5V - enables direct interfacing with 3.3V and 5V microcontrollers without level-shifting |
| Max Clock Rate | 3.0 MHz at VCC = 5V - supports fast parameter updates in real-time control loops |
| Write Cycle Time | ≤10 ms - ensures predictable timeout handling in firmware state machines |
| Endurance | 1 million write cycles - supports daily reconfiguration over 27+ years of field operation |
| Data Retention | 100 years at 25°C - guarantees long-term integrity of stored calibration or security keys |
| Operating Temp | -40°C to +85°C - qualified for industrial environments including factory automation and metering |
Pinout & Package
AT25020-10PI-2.7 uses an 8-lead PDIP (package code 8P3) with 0.300" body width, compatible with through-hole prototyping and legacy industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be low to accept SI data and drive SO output |
| SCK | Serial Clock | Master-generated clock input; timing defines SPI mode 0 or 3 sampling edges |
| SI | Serial Data Input | Receives op-codes, addresses, and write data; ignored unless CS is low and WEN = 1 |
| SO | Serial Data Output | Drives read data and status bits; high-impedance when CS high or HOLD active |
| WP | Write Protect | Hardware lock: pulls low to disable all write instructions regardless of WEN or status register |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting address counter; requires SCK low to assert |
| VCC | Power Supply | 2.7–5.5V main supply; powers internal logic and EEPROM array |
| GND | Ground Reference | Return path for all I/O and core circuitry; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Support | Enables interoperability with diverse MCUs including 68HC11, PIC, and ARM Cortex-M families without protocol translation |
| 8-byte Page Write | Reduces average write time per byte by batching; avoids 256 separate 10-ms cycles for full memory update |
| Four-Level Block Protection | BP1/BP0 bits allow selective locking of top quarter (C0–FF), top half (80–FF), or full array (00–FF) - critical for bootloader safety |
| Self-Timed Internal Write | Eliminates need for external delay timers or polling overhead; firmware waits only for RDY=0 from RDSR |
| HOLD Pin Functionality | Permits MCU to service higher-priority interrupts mid-transfer without losing SPI context or requiring re-synchronization |
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 manufacturing lines. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed via SPI during boot and runtime updates; operates within 2.7–5.5V industrial power rails. Use Value: Enables field-upgradable settings without battery-backed SRAM; 1M endurance supports weekly recalibration over product lifetime. | 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 vault with hardware WP pin disabling writes during clinical operation. Use Value: Meets IEC 62304 Class C software requirements via deterministic 10 ms write cycles and 100-year data retention. |
| Automotive Body Control Module | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Holding seat/mirror position presets, lighting profiles, and door lock logic in 12V automotive body ECUs with local 5V regulation. IC Role / Device Role / Timing Role: SPI slave EEPROM interfaced to 8-bit or 32-bit MCU; withstands -40°C to +85°C ambient per AEC-Q100 stress guidelines. Use Value: Automotive-grade variant available; WP pin prevents accidental overwrites during CAN bus firmware updates. | Use Scenario: Storing encrypted firmware patches and tariff tables in utility-grade electricity meters requiring remote OTA updates. IC Role / Device Role / Timing Role: Secure boot auxiliary storage holding signature-verified update payloads prior to flash programming. Use Value: Block protection isolates patch metadata from user-configurable registers; 8-byte page writes minimize update window exposure. |
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, 20 MHz max clock, 5ms write cycle; SOIC-8 package only | Higher density and speed suit firmware logging; lacks PDIP option and HOLD pin | Select when >2Kbit storage or faster throughput is required and PDIP footprint is not mandatory |
| 25AA020A-I/P | 2Kbit, same PDIP-8 package, but only 1 MHz max clock at 2.5V; no HOLD pin | Lower cost for basic parameter storage where suspend capability is unnecessary | Choose for cost-sensitive industrial sensors where 3 MHz bandwidth and HOLD are unused |
Compared with M95256-WMN6TP and 25AA020A-I/P, AT25020-10PI-2.7 uniquely balances PDIP-8 compatibility, 3 MHz performance, HOLD functionality, and automotive-grade availability - making it optimal for legacy-replacement and interrupt-driven embedded designs.
Availability
AT25020-10PI-2.7 is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, automotive body electronics, and smart metering applications requiring stable component supply across extended product lifecycles.
Supply support for AT25020-10PI-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
Atmel Corporation, now part of Microchip Technology, is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and secure authentication ICs.
The AT250xx family was designed specifically for low-voltage, SPI-based parameter and configuration storage in resource-constrained embedded systems - emphasizing reliability, pin efficiency, and industrial temperature resilience.
FAQ
What is the maximum clock frequency supported by AT25020-10PI-2.7?
The AT25020-10PI-2.7 supports up to 3.0 MHz at VCC = 5.0V and 2.1 MHz at VCC = 2.7V, as specified in its AC characteristics table. This allows high-speed parameter reads in time-critical applications while maintaining compatibility with slower 3.3V microcontrollers. The actual achievable rate depends on bus loading and signal integrity - AT25020-10PI-2.7 requires tWH/tWL ≥ 133 ns minimum at 5V.
Does AT25020-10PI-2.7 require an external erase command before writing?
No, AT25020-10PI-2.7 does not require a separate erase command. All write operations are self-timed and automatically erase the target byte(s) before programming. The device uses a single WRITE instruction (op-code 0000 A010) that handles both erase and program phases internally - AT25020-10PI-2.7 completes this in ≤10 ms.
How is write protection implemented on AT25020-10PI-2.7?
AT25020-10PI-2.7 implements dual-layer write protection: hardware via the WP pin (low = all writes disabled), and software via BP1/BP0 bits in the status register. These bits configure four protection levels - none, top quarter (C0–FF), top half (80–FF), or full array (00–FF). Both mechanisms must be satisfied for a write to proceed - AT25020-10PI-2.7 enforces this at silicon level.
Can AT25020-10PI-2.7 operate in SPI Mode 1 or Mode 2?
No, AT25020-10PI-2.7 explicitly supports only SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1), as confirmed in its Features section. Attempting Mode 1 or Mode 2 will result in incorrect sampling of SI/SO data due to mismatched clock polarity and phase timing - AT25020-10PI-2.7's timing diagrams and functional description validate this limitation.
What is the function of the HOLD pin on AT25020-10PI-2.7?
The HOLD pin on AT25020-10PI-2.7 suspends ongoing SPI communication without resetting the internal address counter or command state. When asserted low while SCK is low, it places SO in high-impedance and ignores SI inputs - allowing the host MCU to service interrupts and resume exactly where it left off. This behavior is documented in the Serial Interface section and timing diagrams - AT25020-10PI-2.7 maintains full context across HOLD assertion.
AT25020-10PI-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- 3 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT25020-10PI-2.7 FAQ
1.How can I place an order for AT25020-10PI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25020-10PI-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 AT25020-10PI-2.7 reliable?
The price and inventory of AT25020-10PI-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 AT25020-10PI-2.7 is usually 5 days.
3.What payment methods are accepted for AT25020-10PI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25020-10PI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25020-10PI-2.7?
AT25020-10PI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25020-10PI-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 AT25020-10PI-2.7?
For technical support, including AT25020-10PI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25020-10PI-2.7 requirements.
6.How does Aetrix verify that AT25020-10PI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT25020-10PI-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 AT25020-10PI-2.7 meets industry standards.
7.What is the process for return or replacement of AT25020-10PI-2.7?
All AT25020-10PI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT25020-10PI-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 AT25020-10PI-2.7 part is unused and in its original packaging.
Return procedure for AT25020-10PI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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