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Microchip Technology AT25020N-10SC
- Part No.:
- AT25020N-10SC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25020N-10SC.pdf
- Description:
- IC EEPROM 2KBIT SPI 3MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,641
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Product details
Overview
AT25020N-10SC from Atmel (now Microchip) is a 2-kbit SPI serial EEPROM organized as 256 × 8-bit memory, supporting 2.7V–5.5V operation, 2.1 MHz clock rate at 5V, and hardware/software write protection via WP pin and status register. It serves as nonvolatile configuration storage in microcontroller-based industrial sensors and power management modules.
For engineers reviewing the AT25020N-10SC datasheet, AT25020N-10SC pinout, AT25020N-10SC application, or AT25020N-10SC equivalent, key selection criteria include VCC range compatibility, page-write timing, block protection granularity, and SOIC-8 footprint integration with SPI host controllers.
Technical Context
The AT25020N-10SC implements a synchronous SPI slave interface compliant with Modes 0 and 3, using separate SI/SO pins and CS-controlled command framing. Its instruction set includes WREN/WRDI for latch control and RDSR/WRSR for status and protection configuration.
It features an 8-byte page write buffer, self-timed internal write cycle (≤10 ms), and four-level block protection (none, 1/4, 1/2, or full array) controlled by BP1/BP0 bits in a nonvolatile status register. HOLD pin enables communication suspension without sequence reset.
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 compact embedded systems |
| Supply Voltage Range | 2.7V to 5.5V - supports dual-rail designs and brown-out tolerant operation across commercial temperature range (0°C to 70°C) |
| Max Clock Frequency | 2.1 MHz at 5V - enables fast configuration reads without overloading low-power MCU SPI peripherals |
| Write Cycle Time | 10 ms max - defines minimum interval between write commands; no external erase required |
| Endurance | 1 million write cycles - ensures reliable logging or counter updates over multi-year product lifetime |
| Data Retention | 100 years - guarantees long-term integrity of stored calibration coefficients or security keys |
| ESD Protection | >4000V HBM - provides robustness against handling and board-level ESD events in manufacturing and field service |
Pinout & Package
AT25020N-10SC is housed in an 8-lead JEDEC-standard SOIC package (8S1), 0.150" wide, with gull-wing leads and 1.27 mm pitch. Pin 1 is marked with a notch or dot; device orientation follows standard SOIC conventions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be low to accept SPI commands; high-Z output when deasserted |
| SCK | Serial Clock | Input-only master-generated clock; defines timing for SI sampling and SO output edges |
| SI | Serial Data Input | Command/address/data input path; MSB-first, synchronized to SCK falling edge (Mode 0) |
| SO | Serial Data Output | Read data output path; tri-state when CS high or during HOLD; MSB-first, synchronized to SCK rising edge |
| WP | Write Protect | Hardware lock: low disables all writes regardless of status register; overrides WREN state |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting address counter; requires SCK low to assert/deassert |
| VCC | Power Supply | Primary supply rail (2.7–5.5V); decoupling capacitor required near pin for noise immunity |
| GND | Ground | Reference return path for all I/O and internal circuitry; must be low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| 8-byte page write mode | Reduces total programming time vs. byte-write by up to 8×; avoids excessive MCU SPI overhead per write operation |
| Four-level block write protection | Enables selective locking of top quarter (C0–FFh), top half (80–FFh), or full array - critical for safeguarding bootloader or security keys |
| Dual write protection mechanism | Combines hardware (WP pin) and software (status register + WREN/WRDI) controls - prevents accidental or malicious writes under varying system states |
| HOLD pin functionality | Allows real-time interruption of SPI transfers (e.g., during interrupt servicing) without losing address context or requiring reinitialization |
| Industrial-grade reliability | 1M endurance and 100-year retention validated across -40°C to +85°C - meets requirements for automotive body control and industrial PLC modules |
Applications
| Smart Energy Meters | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Nonvolatile configuration and event storage peripheral interfaced to ARM Cortex-M3 host via SPI. Use Value: 2.7–5.5V operation matches meter's auxiliary supply; 1M endurance supports daily log writes for >27 years; block protection secures regulatory calibration data. |
Use Scenario: Retaining module identification, channel scaling factors, and fault history in modular analog input/output cards. IC Role / Device Role / Timing Role: SPI-configurable memory for field-replaceable I/O submodules operating in noisy factory environments. Use Value: HOLD pin enables deterministic response to host controller interrupts; >4000V HBM withstands industrial ESD; SOIC-8 fits dense PCB layouts. |
| Medical Diagnostic Sensors | Automotive Body Control Units |
Use Scenario: Saving sensor offset compensation values and usage counters in portable ultrasound transducer assemblies. IC Role / Device Role / Timing Role: Low-power EEPROM co-located with ADC and signal conditioning IC on sensor flex PCB. Use Value: 2.7V min VCC supports battery-backed operation; 100-year retention preserves calibration across device lifecycle; small SOIC-8 footprint minimizes flex area. |
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in door module ECUs. IC Role / Device Role / Timing Role: SPI-connected nonvolatile memory accessed during vehicle power-up and user adjustment events. Use Value: WP pin hardwires protection during CAN bus firmware updates; 8-byte page writes reduce update latency; automotive-grade reliability meets AEC-Q100 stress 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, 20 MHz max clock, 5ms write cycle; operates down to 1.8V | Higher density and speed suit complex firmware storage; not drop-in due to larger memory map and different opcodes | Select when >2Kb storage or faster write throughput is required; verify SPI timing margins and command compatibility |
| 25AA020A-I/P | 2-Kbit, same SOIC-8 package; 10 MHz max clock at 5V; supports 1.8–5.5V; includes unique ID feature | Integrated 128-bit UID enables device authentication; identical pinout and basic command set simplifies migration | Preferred for secure boot or anti-cloning use cases; direct replacement if UID is leveraged and timing constraints allow |
Compared with AT25020N-10SC, M95256-WMN6TP offers higher density but requires layout and firmware adaptation, while 25AA020A-I/P delivers pin-compatible upgrade path with added security ID - both retain SOIC-8 fit and 2.7–5.5V operation.
Availability
AT25020N-10SC is available at Aetrix Electronics and suitable for smart energy meters, industrial PLC I/O modules, medical diagnostic sensors, and automotive body control units requiring stable component supply and long-lifecycle support.
Supply support for AT25020N-10SC 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 devices.
The AT250xx family was designed for low-voltage, low-power serial EEPROM applications in space-constrained embedded systems where SPI interface simplicity and robust data retention are essential.
FAQ
What voltage range does the AT25020N-10SC support, and how does it affect system design?
The AT25020N-10SC supports 2.7V to 5.5V operation, enabling direct interface with both 3.3V and 5V microcontrollers without level-shifting. This simplifies power domain partitioning in mixed-voltage systems and eliminates need for dedicated EEPROM regulators - a key advantage in cost-sensitive industrial and consumer designs where AT25020N-10SC serves as configuration memory.
How does the AT25020N-10SC implement write protection, and can hardware and software methods be used simultaneously?
AT25020N-10SC combines hardware write protection via the WP pin (low = all writes disabled) and software protection via BP1/BP0 bits in the status register (configurable 1/4, 1/2, or full-array lock). Both operate independently: WP overrides status register settings, while WRSR allows dynamic reconfiguration of protected zones - ensuring AT25020N-10SC remains secure even during partial firmware updates.
What is the maximum SPI clock frequency supported by the AT25020N-10SC, and under what conditions is it guaranteed?
The AT25020N-10SC supports up to 2.1 MHz SCK frequency when VCC = 4.5–5.5V, and 2.1 MHz also applies at 2.7–5.5V per AC characteristics table. This is verified across the commercial temperature range (0°C to 70°C); timing margins shrink at lower voltages, so AT25020N-10SC users must validate setup/hold times in their specific 3.3V system implementation.
Does the AT25020N-10SC require a separate erase cycle before writing new data?
No, the AT25020N-10SC performs automatic erase-before-write internally during each self-timed write cycle (≤10 ms). No explicit ERASE command is needed, and page writes overwrite only targeted bytes - simplifying firmware logic and reducing AT25020N-10SC driver code size compared to parallel EEPROMs or flash devices.
Can the AT25020N-10SC be used in automotive applications, and what qualifications does it meet?
The base AT25020N-10SC is rated for commercial temperature (0°C to 70°C) and is not AEC-Q100 qualified. However, the pin-compatible AT25020N-10SI variant (industrial grade, –40°C to +85°C) is commonly used in automotive body electronics; for full automotive qualification, designers should specify AT25020C-10MI or equivalent Microchip automotive-grade variants - AT25020N-10SC itself is suited for cabin-temperature interior modules only.
AT25020N-10SC 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:
- 3 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25020N-10SC FAQ
1.How can I place an order for AT25020N-10SC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25020N-10SC 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 AT25020N-10SC reliable?
The price and inventory of AT25020N-10SC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25020N-10SC is usually 5 days.
3.What payment methods are accepted for AT25020N-10SC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25020N-10SC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25020N-10SC?
AT25020N-10SC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25020N-10SC 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 AT25020N-10SC?
For technical support, including AT25020N-10SC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25020N-10SC requirements.
6.How does Aetrix verify that AT25020N-10SC is sourced from the original manufacturer or authorized distributors?
All AT25020N-10SC 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 AT25020N-10SC meets industry standards.
7.What is the process for return or replacement of AT25020N-10SC?
All AT25020N-10SC units undergo pre-shipment inspection (PSI). If there is an issue with AT25020N-10SC, 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 AT25020N-10SC part is unused and in its original packaging.
Return procedure for AT25020N-10SC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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