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Microchip Technology AT25020AN-10SU-2.7-T
- Part No.:
- AT25020AN-10SU-2.7-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25020AN-10SU-2.7-T.pdf
- Description:
- IC EEPROM 2KBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,135
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Product details
Overview
AT25020AN-10SU-2.7-T 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.
For engineers reviewing the AT25020AN-10SU-2.7-T datasheet, AT25020AN-10SU-2.7-T pinout, AT25020AN-10SU-2.7-T application, or AT25020AN-10SU-2.7-T equivalent, key selection criteria include VCC range compatibility (2.7–5.5V), SOIC-8 package footprint, SPI Mode 0/3 support, 1 million write endurance, and block-level write protection granularity.
Technical Context
The AT25020AN-10SU-2.7-T implements a synchronous serial peripheral interface with dedicated SI/SO pins and operates exclusively as a slave device. Its internal architecture includes an 8-bit instruction register, status register with BP1/BP0 for 1/4, 1/2, or full-array protection, and automatic address incrementing during page writes.
All programming cycles are self-timed (≤5 ms), require prior WREN instruction, and support HOLD pin suspension without sequence reset. Write operations are inhibited when WP = low or WEN = 0, and only RDSR remains active during internal write cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8), sufficient for firmware parameter tables or calibration data in compact embedded systems |
| Interface | SPI-compatible, supports Modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1); no separate erase cycle required |
| Voltage Range | 2.7V to 5.5V supply - enables direct integration with 3.3V and 5V logic domains without level shifting |
| Max Clock Rate | 20 MHz at VCC = 5V - supports high-throughput configuration loading in real-time control loops |
| Write Endurance | 1 million cycles - suitable for applications requiring frequent field-updatable settings (e.g., sensor offset calibration) |
| Data Retention | 100 years at +25°C - ensures long-term reliability in unattended infrastructure monitoring devices |
| Page Size | 8-byte page write - minimizes bus occupancy during multi-byte updates while avoiding overwriting adjacent data |
Pinout & Package
AT25020AN-10SU-2.7-T uses an 8-lead JEDEC SOIC (8S1) package, 0.150" wide body, RoHS-compliant green plastic gull-wing outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be low to accept instructions; high impedance on SO when CS high |
| SCK | Serial Clock | Input-only master-generated clock; timing defines setup/hold windows for SI/SO transitions |
| SI | Serial Data Input | MSB-first instruction/address/data input path; ignored during HOLD or write cycles |
| SO | Serial Data Output | MSB-first read data output; tri-stated when CS high or during internal write |
| GND | Ground Reference | Return path for all I/O and power currents; requires low-impedance PCB connection |
| VCC | Power Supply | 2.7–5.5V supply input; decoupling capacitor (0.1 µF) recommended near pin |
| WP | Write Protect | Hardware lock: low disables all writes regardless of WREN status or status register settings |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting address counter; requires SCK low to assert |
Key Features
| Feature | Design Value |
|---|---|
| Block Write Protection | Four selectable protection levels (none, 1/4, 1/2, or full array) via nonvolatile BP1/BP0 bits in status register |
| Hardware + Software Write Control | WP pin provides immediate physical lock; WREN/WRDI instructions enable fine-grained software control of write enable latch |
| Self-timed Write Cycle | No external timing management needed; internal circuitry completes write in ≤5 ms and automatically clears WEN bit |
| Low-Power Standby | 0.2 µA typical ISB2 at 2.7V - extends battery life in portable diagnostic tools and wireless sensors |
| HOLD Functionality | Enables multi-master arbitration or CPU interrupt servicing without losing SPI state or reinitializing address pointer |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping tables and PID tuning parameters in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via SPI during boot and runtime parameter updates. Use Value: Enables field-reprogrammable logic behavior without firmware reflashing; 1M endurance supports >10 years of daily calibration adjustments. | Use Scenario: Retaining sensor offset/gain coefficients and patient-specific therapy profiles in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter store interfaced to ARM Cortex-M0+ host MCU. Use Value: WP pin prevents accidental overwrite during power transitions; 100-year retention meets ISO 13485 medical device lifecycle requirements. |
| Automotive Body Control Module | Smart Energy Meter Firmware Settings |
Use Scenario: Saving seat/mirror position presets and lighting configuration in 12V automotive BCMs. IC Role / Device Role / Timing Role: SPI EEPROM co-located with CAN controller for local nonvolatile storage. Use Value: 2.7–5.5V operation tolerates cold-crank voltage dips; -40°C to +85°C rating matches under-hood thermal envelope. | Use Scenario: Holding tariff schedules, CT ratio configurations, and communication credentials in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: Secure configuration vault accessed during meter initialization and remote firmware updates. Use Value: Block protection isolates critical security keys from user-modifiable fields; SOIC-8 footprint simplifies conformal coating for outdoor deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95256-DW DW | 256 Kbit capacity, same SOIC-8 package, 2.5–5.5V range, 20 MHz max clock | Higher density for complex parameter sets; lacks HOLD pin and has different status register layout | Select when >2 kbit storage is required and HOLD functionality is not needed |
| CAT25256VI-GT3 | 256 Kbit, SOIC-8, 1.8–5.5V, 10 MHz max clock, built-in write protect using A0/A1 pins | Broader voltage range but lower speed; no dedicated WP/HOLD pins - protection implemented via address pins | Choose for ultra-low-voltage (1.8V) systems where reduced clock rate is acceptable |
Compared with M95256-DW and CAT25256VI-GT3, the AT25020AN-10SU-2.7-T offers optimal balance of density, speed, and feature set for mid-complexity embedded systems - retaining HOLD and dedicated WP while fitting standard SOIC-8 layouts and supporting 20 MHz operation at 3.3V.
Availability
AT25020AN-10SU-2.7-T is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, automotive body electronics, and smart metering applications requiring stable component supply and long-term manufacturability.
Supply support for AT25020AN-10SU-2.7-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 components, and memory solutions, with a focus on embedded control and connectivity.
The AT25020AN-10SU-2.7-T belongs to Microchip's legacy AT25xxx SPI EEPROM family, designed for reliable, low-power nonvolatile storage in space-constrained industrial and commercial systems where pin count and board area are critical.
FAQ
What is the maximum clock frequency supported by the AT25020AN-10SU-2.7-T at 3.3V operation?
The AT25020AN-10SU-2.7-T supports up to 10 MHz at VCC = 2.7–3.6V per Table 4 AC Characteristics. While rated for 20 MHz at 5V, its guaranteed maximum clock rate at 3.3V is 10 MHz - sufficient for most configuration read/write operations in microcontroller peripherals without timing margin concerns.
Does the AT25020AN-10SU-2.7-T require an external pull-up resistor on the SO pin?
No, the AT25020AN-10SU-2.7-T features an actively driven SO output with push-pull structure, eliminating the need for external pull-ups. The SO pin transitions between valid VOH/ VOL levels and high-impedance states - confirmed by VOH1 = VCC − 0.8V and VOL1 = 0.4V specifications in Table 3.
How does block write protection work on the AT25020AN-10SU-2.7-T, and what addresses does it cover?
Block write protection on the AT25020AN-10SU-2.7-T is controlled by BP1/BP0 bits in the status register. For AT25020A (2 kbit), Level 1 (BP1=0, BP0=1) protects addresses C0–FFh (1/4 array), Level 2 (BP1=1, BP0=0) protects 80–FFh (1/2 array), and Level 3 (BP1=1, BP0=1) locks 00–FFh (entire 256-byte array).
Can the AT25020AN-10SU-2.7-T be used in SPI Mode 3 (CPOL=1, CPHA=1), and is this verified in the datasheet?
Yes, the AT25020AN-10SU-2.7-T explicitly supports SPI Modes 0 and 3, as stated in the Features section of the datasheet (3348J–SEEPR–8/06). Mode 3 operation is fully characterized - SCK idles high, data sampled on the first edge (falling), and setup/hold timing aligns with tSU/tH values specified for all VCC ranges.
What is the standby current consumption of the AT25020AN-10SU-2.7-T at 2.7V, and how is it measured?
The AT25020AN-10SU-2.7-T draws 0.2 µA typical standby current (ISB2) at VCC = 2.7V and TA = 25°C, with a maximum of 1.0 µA over temperature, as specified in Table 3 DC Characteristics. This is measured with CS = VCC (device deselected) and all other inputs at valid logic levels.
AT25020AN-10SU-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-10SU-2.7-T FAQ
1.How can I place an order for AT25020AN-10SU-2.7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25020AN-10SU-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-10SU-2.7-T reliable?
The price and inventory of AT25020AN-10SU-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-10SU-2.7-T is usually 5 days.
3.What payment methods are accepted for AT25020AN-10SU-2.7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25020AN-10SU-2.7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25020AN-10SU-2.7-T?
AT25020AN-10SU-2.7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25020AN-10SU-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-10SU-2.7-T?
For technical support, including AT25020AN-10SU-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-10SU-2.7-T requirements.
6.How does Aetrix verify that AT25020AN-10SU-2.7-T is sourced from the original manufacturer or authorized distributors?
All AT25020AN-10SU-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-10SU-2.7-T meets industry standards.
7.What is the process for return or replacement of AT25020AN-10SU-2.7-T?
All AT25020AN-10SU-2.7-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25020AN-10SU-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-10SU-2.7-T part is unused and in its original packaging.
Return procedure for AT25020AN-10SU-2.7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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