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Microchip Technology AT25040AN-10SU-1.8
- Part No.:
- AT25040AN-10SU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25040AN-10SU-1.8.pdf
- Description:
- IC EEPROM 4KBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,931
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Product details
Overview
AT25040AN-10SU-1.8 from Microchip Technology (formerly Atmel) is a 4-kbit SPI serial EEPROM organized as 512 words × 8 bits, operating from 1.8 V to 5.5 V, supporting 20 MHz clock rate at 5 V, featuring 8-byte page write mode and hardware/software write protection via WP pin and status register. It serves as nonvolatile configuration storage in industrial sensor nodes and embedded control modules requiring low-voltage operation.
For engineers reviewing the AT25040AN-10SU-1.8 datasheet, AT25040AN-10SU-1.8 pinout, AT25040AN-10SU-1.8 application, or AT25040AN-10SU-1.8 equivalent, this page delivers verified electrical specs, JEDEC SOIC-8 package mapping, SPI Mode 0/3 timing compliance, block write protection levels, and validated alternatives for design-in and BOM replacement.
Technical Context
The AT25040AN-10SU-1.8 implements a synchronous slave SPI interface with dedicated SI/SO pins, CS-controlled selection, and HOLD pin for serial communication suspension without reset. Its internal architecture includes an 8-bit instruction register, status register with BP1/BP0 for 1/4–full array protection, and self-timed write cycle logic.
It supports dual voltage operation (1.8–5.5 V), delivers 5 ms max write cycle time, and maintains compatibility with 6805/68HC11 microcontroller SPI peripherals. The device uses MSB-first data transfer and requires WREN before WRITE, with RDSR used to monitor RDY/WEN status during programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 kbit (512 × 8), sufficient for firmware parameter tables or calibration data in compact MCU systems. |
| Interface | SPI slave with Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) support; no separate erase needed before write. |
| Supply Voltage Range | 1.8 V to 5.5 V - enables direct integration into 1.8 V logic domains or mixed-voltage systems without level shifters. |
| Max Clock Frequency | 20 MHz at VCC = 5 V - allows high-throughput configuration updates in real-time control loops. |
| Write Endurance | 1 million cycles - supports frequent logging or runtime parameter adjustment in industrial HMI or metering applications. |
| Data Retention | 100 years at +25 °C - ensures long-term reliability of stored calibration coefficients or security keys across product lifetime. |
| Write Protection | Hardware (WP pin) + software (status register BP1/BP0) enabling 0%, 25%, 50%, or 100% array lock - prevents accidental overwrites during field firmware updates. |
Pinout & Package
AT25040AN-10SU-1.8 is packaged in an 8-lead JEDEC SOIC (package code 8S1), 0.150" wide body, RoHS-compliant, green plastic gull-wing outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be low to accept instructions; high impedance on SO when CS is high. |
| SCK | Serial Clock | Input-only clock; defines timing for SI sampling and SO output; supports up to 20 MHz at 5 V. |
| SI | Serial Data Input | Master-to-slave data path for op-codes, addresses, and write data; MSB-first transmission required. |
| SO | Serial Data Output | Slave-to-master data path for read data and status register contents; tri-stated when CS is high. |
| GND | Ground Reference | 0 V reference for all I/O and supply pins; must be connected to system ground plane for noise immunity. |
| VCC | Power Supply | Single supply input (1.8–5.5 V); powers internal logic, memory array, and I/O buffers. |
| WP | Write Protect | Active-low hardware lock; disables all write operations including WREN when pulled low; overrides status register settings. |
| HOLD | Communication Suspend | Active-low pause control; halts ongoing SPI transaction without resetting address counter or command state. |
Key Features
| Feature | Design Value |
|---|---|
| 8-byte Page Write Mode | Enables burst programming of up to 8 sequential bytes per CS pulse, reducing total write time versus byte-by-byte writes. |
| Block Write Protection | Four protection levels (none, 1/4, 1/2, full array) controlled by nonvolatile BP1/BP0 bits - preserves critical boot parameters during field upgrades. |
| Self-timed Write Cycle | Internal timing eliminates need for external delay or polling overhead; max 5 ms duration ensures predictable firmware execution flow. |
| Low Standby Current | 0.1 µA typical at 1.8 V - extends battery life in always-on IoT edge sensors and portable diagnostic tools. |
| Industrial Temp Range | −40 °C to +85 °C operation - qualified for deployment in automotive body controllers, factory automation PLCs, and outdoor metering equipment. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing temperature-compensated offset/gain coefficients for analog front-end sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-up initialization and recalibration routines. Use Value: Enables field-adjustable calibration without firmware reflash; 100-year retention guarantees accuracy across multi-decade deployments. | Use Scenario: Holding user-selectable therapy modes, alarm thresholds, and audit log metadata in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, low-power configuration memory interfaced via SPI from ARM Cortex-M4 host MCU. Use Value: 1.8 V operation allows direct connection to MCU's 1.8 V I/O domain; WP pin prevents unintended changes during ESD events. |
| Automotive Body Control Module | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Saving seat/mirror position presets and lighting profiles in 12 V automotive systems with local 3.3 V regulation. IC Role / Device Role / Timing Role: SPI-configurable EEPROM co-located with microcontroller for fast access to user preferences. Use Value: 2.7–5.5 V option available; this 1.8–5.5 V variant supports wider input transients and cold-cranking conditions. | Use Scenario: Storing signed firmware patch images and version metadata in utility-grade electricity meters with tamper detection. IC Role / Device Role / Timing Role: Trusted nonvolatile storage for post-deployment updates, accessed only after cryptographic signature verification. Use Value: Block write protection isolates patch storage region from runtime configuration area, preventing corruption during OTA update failures. |
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, SOIC-8, but uses different status register bit layout and lacks HOLD pin. | No HOLD functionality limits use in systems requiring interruptible SPI transactions during real-time monitoring. | Select when HOLD is unused and STMicroelectronics supply chain alignment is prioritized. |
| BR24G04FJ-3GE2 | 4 kbit I²C EEPROM, 1.7–5.5 V, 1 MHz max clock, TSSOP-8; uses two-wire interface instead of SPI. | Requires I²C master peripheral and pull-up resistors; incompatible with existing SPI-based firmware without driver rewrite. | Choose for space-constrained designs where I²C bus sharing reduces pin count, and lower speed is acceptable. |
Compared with M95040-DRMN3TP/K and BR24G04FJ-3GE2, the AT25040AN-10SU-1.8 uniquely combines HOLD capability, SPI Mode 0/3 flexibility, and 8-byte page write - making it optimal for deterministic, interrupt-resilient embedded configurations where timing predictability and interface compatibility are critical.
Availability
AT25040AN-10SU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart energy meter firmware patch storage requiring stable component supply and long-term lifecycle support.
Supply support for AT25040AN-10SU-1.8 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 delivering microcontrollers, analog devices, and memory solutions for embedded control applications.
The AT25040AN-10SU-1.8 belongs to Microchip's legacy AT25xxx serial EEPROM family, designed specifically for reliable, low-voltage nonvolatile data storage in resource-constrained industrial and commercial systems.
FAQ
What is the maximum clock frequency supported by AT25040AN-10SU-1.8 at 1.8 V?
The AT25040AN-10SU-1.8 supports up to 5 MHz SCK frequency when operated at 1.8 V, as specified in Table 4 AC Characteristics under the 1.8–5.5 V column. This ensures robust timing margins for low-power systems while maintaining compatibility with standard SPI peripherals.
Does AT25040AN-10SU-1.8 require an external pull-up resistor on the SO pin?
No, AT25040AN-10SU-1.8 does not require an external pull-up on SO. The SO pin is actively driven high or low during read operations and enters high-impedance state when CS is high or during HOLD assertion - eliminating need for external biasing.
How is write protection configured on AT25040AN-10SU-1.8?
Write protection on AT25040AN-10SU-1.8 is configured using both hardware (WP pin) and software (WRSR instruction). Pulling WP low disables all writes unconditionally; setting BP1/BP0 bits in the status register enables 1/4, 1/2, or full-array software lock - both methods can be used concurrently.
Can AT25040AN-10SU-1.8 be used in automotive applications?
Yes, AT25040AN-10SU-1.8 is rated for −40 °C to +85 °C operation and is explicitly listed as "Automotive Devices Available" in its datasheet features. It meets industrial temperature requirements commonly applied in automotive body electronics, though not AEC-Q100 qualified.
What happens if the HOLD pin is asserted during a write cycle on AT25040AN-10SU-1.8?
If HOLD is asserted during a write cycle on AT25040AN-10SU-1.8, the internal write operation continues uninterrupted. HOLD only suspends serial communication (SI/SO activity); it does not abort or pause the self-timed write cycle, which completes in ≤5 ms regardless of HOLD state.
AT25040AN-10SU-1.8 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25040AN-10SU-1.8 FAQ
1.How can I place an order for AT25040AN-10SU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25040AN-10SU-1.8 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-1.8 reliable?
The price and inventory of AT25040AN-10SU-1.8 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-1.8 is usually 5 days.
3.What payment methods are accepted for AT25040AN-10SU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25040AN-10SU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25040AN-10SU-1.8?
AT25040AN-10SU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25040AN-10SU-1.8 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-1.8?
For technical support, including AT25040AN-10SU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25040AN-10SU-1.8 requirements.
6.How does Aetrix verify that AT25040AN-10SU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT25040AN-10SU-1.8 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-1.8 meets industry standards.
7.What is the process for return or replacement of AT25040AN-10SU-1.8?
All AT25040AN-10SU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT25040AN-10SU-1.8, 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-1.8 part is unused and in its original packaging.
Return procedure for AT25040AN-10SU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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