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Microchip Technology AT25040AN-10SU-2.7
- Part No.:
- AT25040AN-10SU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25040AN-10SU-2.7.pdf
- Description:
- IC EEPROM 4KBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,322
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Product details
Overview
AT25040AN-10SU-2.7 from Microchip Technology (formerly Atmel) is a 4-Kbit SPI serial EEPROM organized as 512 words × 8 bits, operating from 2.7V to 5.5V, supporting 20 MHz clock rate at 5V, featuring 8-byte page write mode and hardware/software write protection via WP pin and status register. It serves in industrial control systems for firmware parameter storage and calibration data retention.
For engineers reviewing the AT25040AN-10SU-2.7 datasheet, AT25040AN-10SU-2.7 pinout, AT25040AN-10SU-2.7 application, or AT25040AN-10SU-2.7 equivalent, key selection criteria include low-voltage operation (2.7–5.5 V), 1 million write endurance, 100-year data retention, SPI Mode 0/3 compatibility, and TSSOP-8 packaging with industrial temperature range (−40°C to +85°C).
Technical Context
The AT25040AN-10SU-2.7 implements a synchronous serial peripheral interface (SPI) slave architecture with separate SI/SO lines, CS-controlled selection, and HOLD pin for communication suspension without sequence reset. Its internal logic includes an 8-bit instruction register, address decoder, and status register with nonvolatile BP1/BP0 bits for block-level write protection.
It uses self-timed internal write cycles (≤5 ms), requires WREN before WRITE, and supports four protection levels (none, 1/4, 1/2, or full array) via WRSR. The device powers up in write-disabled state and maintains high-impedance SO during CS high or HOLD active states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (512 × 8), sufficient for storing configuration tables or small firmware patches in space-constrained designs |
| Supply Voltage Range | 2.7 V to 5.5 V - enables direct interfacing with 3.3 V and 5 V microcontrollers without level shifting |
| Max Clock Frequency | 20 MHz at VCC = 5 V - supports high-throughput parameter updates in real-time systems |
| Write Endurance | 1,000,000 cycles - ensures reliable logging in industrial data acquisition over 10+ years of field operation |
| Data Retention | 100 years at 25°C - guarantees long-term integrity of calibration coefficients and security keys |
| Page Write Size | 8 bytes - minimizes bus occupancy during burst writes while avoiding overwriting adjacent memory pages |
| Operating Temperature | −40°C to +85°C - qualified for use in automotive body control modules and factory automation equipment |
Pinout & Package
AT25040AN-10SU-2.7 is housed in an 8-lead JEDEC SOIC package (8S1), 0.150" wide, RoHS-compliant, green molded plastic with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be low to accept instructions; high-Z SO when high |
| SCK | Serial Clock | Input-only master-generated clock; defines timing for SI sampling and SO output |
| SI | Serial Data Input | Accepts op-codes, addresses, and data; MSB-first transmission required |
| SO | Serial Data Output | Drives read data; tri-states when CS high or during HOLD assertion |
| GND | Ground Reference | Return path for all I/O and power; must be connected to system common ground plane |
| VCC | Power Supply | 2.7–5.5 V supply; decoupling capacitor (0.1 µF) required within 10 mm of pin |
| WP | Write Protect | Hardware lock: low disables all write operations regardless of status register setting |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting address counter; requires SCK low to assert |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Support | Compatible with both Motorola and TI-style microcontroller SPI peripherals without protocol translation |
| Block Write Protection | Configurable via status register to protect 0%, 25%, 50%, or 100% of memory - prevents accidental overwrite of critical boot parameters |
| Self-Timed Write Cycle | No external erase step needed; internal timing eliminates need for host-side delay loops or polling overhead |
| Low Standby Current | 0.2 µA typical at 2.7 V - extends battery life in portable medical devices and wireless sensor nodes |
| HOLD Pin Functionality | Enables multi-master arbitration by suspending transfers mid-sequence, preserving address pointer across interruptions |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module Calibration |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning constants, and alarm thresholds in programmable logic controllers deployed in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed via SPI during boot and runtime reconfiguration; no refresh required. Use Value: Enables field-upgradable control logic without requiring external FRAM or battery-backed SRAM, reducing BOM cost and board area. |
Use Scenario: Retaining seat position memory, mirror angle offsets, and lighting profiles across ignition cycles in 12 V automotive systems. IC Role / Device Role / Timing Role: SPI-connected EEPROM providing deterministic <5 ms write latency for user preference saves after vehicle shutdown. Use Value: Meets AEC-Q100 stress requirements via −40°C to +85°C rating and 1M endurance, eliminating need for redundant storage schemes. |
| Medical Infusion Pump Safety Parameters | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Holding dose limits, alarm thresholds, and calibration coefficients in Class II medical devices subject to IEC 62304 software lifecycle controls. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory with hardware WP pin and status-register-based protection for safety-critical data. Use Value: Supports traceable firmware updates and audit-ready parameter history logs with guaranteed 100-year retention under ISO 13485 conditions. |
Use Scenario: Storing delta patches for firmware upgrades in utility-grade electricity meters operating unattended for 15+ years. IC Role / Device Role / Timing Role: High-reliability serial EEPROM interfaced to ARM Cortex-M0+ MCU via dedicated SPI bus with CRC-protected transfers. Use Value: Eliminates risk of bricking during OTA updates by enabling atomic patch application with rollback capability using protected memory segments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95040-DRMN3TP/K | 4 Kbit SPI EEPROM, 1.8–5.5 V, 20 MHz max, TSSOP-8, same pinout but STMicroelectronics silicon | Identical memory size and interface; differs in status register bit layout and HOLD timing specs | Select when ST ecosystem alignment or dual-sourcing is required; verify RDSR/WRSR command compatibility |
| CAT25040VI-GT3 | 4 Kbit SPI EEPROM, 1.8–5.5 V, 10 MHz max, SOIC-8, ON Semiconductor part with lower max clock rate | Same package and voltage range but reduced speed; lacks HOLD pin functionality | Choose for cost-sensitive designs where 10 MHz SPI bandwidth suffices and HOLD is unused |
Compared with M95040-DRMN3TP/K and CAT25040VI-GT3, the AT25040AN-10SU-2.7 offers superior timing margin (20 MHz vs. 10 MHz), integrated HOLD functionality for robust multi-master systems, and verified interoperability with legacy Atmel-based platforms.
Availability
AT25040AN-10SU-2.7 is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, medical device parameter storage, and smart metering applications requiring stable component supply across extended product lifecycles.
Supply support for AT25040AN-10SU-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
Microchip Technology acquired Atmel in 2016 and continues to manufacture, qualify, and support the AT25xxx family of serial EEPROMs with full backward compatibility and long-term supply commitment.
The AT25040AN-10SU-2.7 belongs to Microchip's industrial-grade serial EEPROM product line, designed specifically for reliable nonvolatile data storage in resource-constrained embedded systems where low power, small footprint, and SPI simplicity are critical.
FAQ
What is the maximum clock frequency supported by the AT25040AN-10SU-2.7?
The AT25040AN-10SU-2.7 supports up to 20 MHz SCK frequency when operated at VCC = 5.0 V. At 2.7 V, the maximum rated clock frequency is 10 MHz per AC Characteristics Table 4. This ensures timing compliance across its full 2.7–5.5 V supply range without derating or external clock dividers.
Does the AT25040AN-10SU-2.7 require an external erase cycle before writing?
No, the AT25040AN-10SU-2.7 does not require a separate erase cycle. All write operations are self-timed and automatically erase and program the target byte or page internally. A write begins only after CS goes high following valid WRITE instruction, address, and data transmission.
How is write protection implemented on the AT25040AN-10SU-2.7?
AT25040AN-10SU-2.7 implements dual-layer write protection: hardware via the WP pin (low = all writes inhibited), and software via BP1/BP0 bits in the status register (configurable 0%, 25%, 50%, or 100% array protection). Both mechanisms must be satisfied for a write to proceed.
What package type is used for the AT25040AN-10SU-2.7?
The AT25040AN-10SU-2.7 uses an 8-lead JEDEC SOIC package (8S1), 0.150" wide, with gull-wing leads, RoHS-compliant green molding compound, and industrial temperature rating (−40°C to +85°C).
Can the AT25040AN-10SU-2.7 operate with a 1.8 V supply?
No - the AT25040AN-10SU-2.7 is specified for 2.7 V to 5.5 V operation only. For 1.8 V systems, Microchip offers the AT25040AN-10SU-1.8 variant, which shares identical pinout and functionality but is characterized down to 1.8 V.
AT25040AN-10SU-2.7 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:
- 4Kbit
- Memory Organization:
- 512 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
AT25040AN-10SU-2.7 FAQ
1.How can I place an order for AT25040AN-10SU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25040AN-10SU-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 AT25040AN-10SU-2.7 reliable?
The price and inventory of AT25040AN-10SU-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 AT25040AN-10SU-2.7 is usually 5 days.
3.What payment methods are accepted for AT25040AN-10SU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25040AN-10SU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25040AN-10SU-2.7?
AT25040AN-10SU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25040AN-10SU-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 AT25040AN-10SU-2.7?
For technical support, including AT25040AN-10SU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25040AN-10SU-2.7 requirements.
6.How does Aetrix verify that AT25040AN-10SU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT25040AN-10SU-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 AT25040AN-10SU-2.7 meets industry standards.
7.What is the process for return or replacement of AT25040AN-10SU-2.7?
All AT25040AN-10SU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT25040AN-10SU-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 AT25040AN-10SU-2.7 part is unused and in its original packaging.
Return procedure for AT25040AN-10SU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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