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Microchip Technology AT25020AN-10SI-1.8-T
- Part No.:
- AT25020AN-10SI-1.8-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25020AN-10SI-1.8-T.pdf
- Description:
- IC EEPROM 2KBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,412
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Product details
Overview
AT25020AN-10SI-1.8-T from Microchip Technology (formerly Atmel) is a 2-kbit SPI serial EEPROM organized as 256 words × 8 bits, operating from 1.8 V to 5.5 V with 20 MHz clock rate at 5 V, 8-byte page write capability, and hardware/software write protection. It serves as nonvolatile configuration storage in microcontroller-based industrial control modules requiring low-voltage operation and automotive-grade reliability.
For engineers reviewing the AT25020AN-10SI-1.8-T datasheet, AT25020AN-10SI-1.8-T pinout, AT25020AN-10SI-1.8-T application, or AT25020AN-10SI-1.8-T equivalent, key selection criteria include 1.8 V minimum supply voltage, 8-lead SOIC package compatibility, SPI Mode 0/3 interface timing, and block-level write protection for firmware parameter retention.
Technical Context
The AT25020AN-10SI-1.8-T implements a synchronous slave SPI interface with separate SI/SO pins, MSB-first data transfer, and chip-select–driven command protocol. It supports two SPI modes (0 and 3), uses an 8-bit instruction register, and requires WREN before WRITE or WRSR commands.
Internal architecture includes a status register with RDY/WEN/BP1/BP0 bits, nonvolatile block protection bits mapped to memory segments, and automatic address increment during continuous read. Write cycles are self-timed (≤5 ms), require no pre-erase, and support 8-byte page writes with wraparound addressing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8), sufficient for storing calibration coefficients or device ID in compact embedded systems |
| Supply Voltage Range | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V logic and mixed-voltage MCU systems without level shifters |
| Max Clock Frequency | 20 MHz at VCC = 5 V - supports high-speed configuration loading in boot-time-critical applications |
| Write Cycle Time | ≤5 ms - defines minimum interval between successive write operations; impacts firmware update latency |
| Endurance | 1 million write cycles - ensures reliable field updates over 10+ years in industrial logging applications |
| Data Retention | 100 years at 25 °C - guarantees long-term integrity of stored calibration or security keys |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial and automotive under-hood environments |
Pinout & Package
AT25020AN-10SI-1.8-T is housed in an 8-lead JEDEC SOIC (8S1) package, 0.150" wide, surface-mount compatible with standard reflow profiles and IPC-7351B land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates SPI command sequence and places SO in high-Z when deasserted |
| SCK | Serial Clock | Master-generated clock; timing reference for SI sampling and SO output; supports Modes 0 and 3 |
| SI | Serial Data Input | Receives op-code, address, and data; ignored during HOLD or when CS is high |
| SO | Serial Data Output | Drives read data or status bits; tri-stated when CS is high or during internal write cycle |
| GND | Ground Reference | Return path for all I/O and power currents; must be low-impedance for noise immunity |
| VCC | Power Supply | 1.8–5.5 V input; powers internal logic and memory array; bypass capacitor required per layout guidelines |
| WP | Write Protect | Hardware lock: low disables all write operations including WREN, independent of status register |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting state; allows master to service higher-priority interrupts |
Key Features
| Feature | Design Value |
|---|---|
| 8-byte Page Write | Reduces firmware update time by enabling burst writes to contiguous addresses without repeated CS toggling |
| Block Write Protection | Four protection levels (none, 1/4, 1/2, full array) configurable via nonvolatile BP1/BP0 bits in status register |
| Dual Write Protection | Combines hardware (WP pin) and software (WREN/WRSR) mechanisms to prevent accidental or malicious writes |
| Self-timed Internal Write | Eliminates need for external write-cycle timing control; RDY bit indicates completion via RDSR polling |
| Automotive Grade Qualification | Meets extended temperature (−40 °C to +85 °C) and reliability requirements for automotive body electronics |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain values in a pressure transducer module operating at 2.5 V. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-up initialization via SPI from an ARM Cortex-M0+ MCU. Use Value: Enables plug-and-play sensor replacement without host-side recalibration; 1.8 V operation matches low-power MCU sleep rail. | Use Scenario: Retaining user-selected therapy parameters and usage logs in a portable insulin pump with battery backup. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration memory interfaced through isolated SPI to prevent EMI-induced corruption. Use Value: 1 million endurance cycles support daily parameter updates over 10+ years; WP pin prevents runtime overwrite during fault conditions. |
| Automotive Body Control Module | Smart Energy Meter Firmware Storage |
Use Scenario: Holding door lock actuator timing profiles and seat position presets in a BCM exposed to −40 °C cold cranking. IC Role / Device Role / Timing Role: SPI EEPROM providing persistent settings storage with HOLD pin support for interrupt-driven MCU operation. Use Value: −40 °C to +85 °C rating ensures reliability across vehicle lifetime; 8-lead SOIC footprint minimizes PCB area in space-constrained modules. | Use Scenario: Storing tariff tables, meter ID, and cryptographic keys in a DIN-rail-mounted electricity meter with 10-year field life. IC Role / Device Role / Timing Role: Trusted nonvolatile memory accessed during secure boot and firmware validation sequences. Use Value: 100-year data retention guarantees key integrity over product lifecycle; block protection isolates critical security fields from application writes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95256-DFMN6TP | 256 Kbit capacity, 5 V only (4.5–5.5 V), 20 MHz max, same 8-lead SOIC package | Higher density for larger configuration sets; not suitable for 1.8 V systems | Select when >2 Kbit storage is required and system operates exclusively at 5 V |
| BR24G02FJ-3GE2 | I²C interface (not SPI), 1.7–5.5 V, 1 MHz max, 8-lead TSSOP package | Requires I²C-capable MCU; slower interface limits boot-time reads | Choose for designs already using I²C bus to reduce pin count and avoid SPI resource contention |
Compared with M95256-DFMN6TP and BR24G02FJ-3GE2, the AT25020AN-10SI-1.8-T uniquely balances 1.8 V compatibility, SPI speed, and compact 2 Kbit density-making it optimal for cost-sensitive, low-voltage industrial controllers where pin count and voltage headroom are constrained.
Availability
AT25020AN-10SI-1.8-T is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart energy meter firmware storage requiring stable component supply across multi-year production cycles.
Supply support for AT25020AN-10SI-1.8-T 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 nonvolatile memory solutions for industrial, automotive, and consumer markets.
The AT25020AN-10SI-1.8-T belongs to Microchip's legacy AT25 SPI EEPROM family, designed for robust, low-power, pin-efficient nonvolatile storage in resource-constrained embedded systems.
FAQ
What is the maximum clock frequency supported by the AT25020AN-10SI-1.8-T at 1.8 V?
The AT25020AN-10SI-1.8-T supports up to 5 MHz SCK frequency when operated at 1.8 V, as specified in Table 4 AC Characteristics for the 1.8–5.5 V voltage range. This ensures reliable communication in ultra-low-power systems while maintaining deterministic timing margins.
Does the AT25020AN-10SI-1.8-T require an external pull-up resistor on the SO pin?
No, the AT25020AN-10SI-1.8-T features an actively driven SO pin with push-pull output structure. External pull-ups are unnecessary and may cause bus contention; the SO pin transitions to high-impedance only when CS is high or during internal write cycles.
How does the HOLD pin function during an active write cycle in the AT25020AN-10SI-1.8-T?
The HOLD pin has no effect during an internal write cycle (tWC). Once a WRITE command completes the CS high transition, the device enters self-timed programming mode and ignores HOLD. HOLD only suspends ongoing SPI read/write sequences-not active erase or write operations.
Can the AT25020AN-10SI-1.8-T be used in SPI Mode 1 or Mode 2?
No. The AT25020AN-10SI-1.8-T explicitly supports only SPI Modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1), as stated in the Features section. Using Mode 1 or Mode 2 will result in incorrect data sampling and command misinterpretation.
What happens if the WP pin is pulled low mid-write on the AT25020AN-10SI-1.8-T?
If WP is pulled low after CS goes high to initiate a write but before the internal tWC completes, the ongoing write is immediately aborted and the memory contents remain unchanged. The device remains in write-disable state until WREN is reissued and WP is returned high.
AT25020AN-10SI-1.8-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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25020AN-10SI-1.8-T FAQ
1.How can I place an order for AT25020AN-10SI-1.8-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25020AN-10SI-1.8-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-1.8-T reliable?
The price and inventory of AT25020AN-10SI-1.8-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-1.8-T is usually 5 days.
3.What payment methods are accepted for AT25020AN-10SI-1.8-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25020AN-10SI-1.8-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25020AN-10SI-1.8-T?
AT25020AN-10SI-1.8-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25020AN-10SI-1.8-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-1.8-T?
For technical support, including AT25020AN-10SI-1.8-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25020AN-10SI-1.8-T requirements.
6.How does Aetrix verify that AT25020AN-10SI-1.8-T is sourced from the original manufacturer or authorized distributors?
All AT25020AN-10SI-1.8-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-1.8-T meets industry standards.
7.What is the process for return or replacement of AT25020AN-10SI-1.8-T?
All AT25020AN-10SI-1.8-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25020AN-10SI-1.8-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-1.8-T part is unused and in its original packaging.
Return procedure for AT25020AN-10SI-1.8-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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