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Microchip Technology AT25320AN-10SU-2.7
- Part No.:
- AT25320AN-10SU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25320AN-10SU-2.7.pdf
- Description:
- IC EEPROM 32KBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,495
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Product details
Overview
AT25320AN-10SU-2.7 from Microchip Technology (formerly Atmel) is a 32-Kbit SPI serial EEPROM organized as 4096 × 8 bits, operating from 2.7V to 5.5V, supporting 20 MHz clock rate at 5V, and featuring hardware write protection via WP pin and software-controlled block protection. It is used in industrial control systems for parameter storage and calibration data retention.
For engineers reviewing the AT25320AN-10SU-2.7 datasheet, AT25320AN-10SU-2.7 pinout, AT25320AN-10SU-2.7 application, or AT25320AN-10SU-2.7 equivalent, key selection criteria include VCC range compatibility (2.7–5.5 V), 8-lead SOIC package footprint, 32-byte page write capability, 1 million endurance cycles, and support for SPI Modes 0 and 3 with HOLD/CS/SCK/SI/SO interface signals.
Technical Context
The AT25320AN-10SU-2.7 implements a synchronous serial peripheral interface (SPI) slave architecture with separate SI (input) and SO (output) pins, MSB-first data transfer, and CS-driven command framing. It uses an 8-bit instruction register with op-codes for WREN, WRDI, RDSR, WRSR, READ, and WRITE operations.
Block write protection is controlled by nonvolatile BP0/BP1 bits in the status register, enabling protection of 0%, 25%, 50%, or 100% of the memory array. The WP pin-when enabled via WPEN bit-blocks writes to the status register and protected blocks, while HOLD suspends ongoing serial communication without resetting the sequence.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 32 Kbit (4096 × 8 bits), sufficient for firmware configuration tables or sensor calibration maps in space-constrained designs |
| Supply voltage | 2.7 V to 5.5 V - supports direct interfacing with 3.3 V and 5 V microcontrollers without level shifting |
| Max clock frequency | 20 MHz at VCC = 5 V - enables fast bulk reads/writes in high-throughput embedded logging applications |
| Page write size | 32 bytes - minimizes write latency per transaction and reduces host CPU overhead during sequential updates |
| Endurance | 1 million write cycles - ensures reliable operation over 10+ years in daily-configurable industrial HMI or metering devices |
| Data retention | 100 years at +25 °C - guarantees long-term integrity of stored calibration coefficients or security keys without refresh |
| Operating temperature | –40 °C to +85 °C - qualified for use in automotive body control modules and outdoor industrial sensors |
Pinout & Package
AT25320AN-10SU-2.7 is supplied in an 8-lead JEDEC SOIC (8S1) package, 0.150" wide, RoHS-compliant and green, with standard gull-wing lead form factor compatible with automated SMT assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; device ignores SI and drives SO high-Z when CS is high |
| SCK | Serial Clock | Input-only clock synchronized to master; defines timing for SI sampling and SO output edges |
| SI | Serial Data Input | Receives op-code, address, and data; latched on SCK rising edge in Mode 0 |
| SO | Serial Data Output | Drives read data and status bits; tri-stated when CS is high or HOLD is asserted |
| GND | Ground reference | Return path for all digital I/O and internal circuitry; must be low-impedance for noise immunity |
| VCC | Power supply | Single 2.7–5.5 V rail powers logic and memory array; no separate VIO required |
| WP | Write Protect | Hardware lock for status register and protected memory blocks when WPEN = 1 and WP = low |
| HOLD | Communication suspend | Pauses active SPI transfer without losing internal address/state; requires SCK low before assertion |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 support | Interoperates with legacy 68HC11 and modern ARM Cortex-M SPI controllers without protocol translation |
| 32-byte page write | Reduces average programming time per byte by >75% vs. byte-write mode, improving system responsiveness |
| Four-level block protection | Enables selective lockdown of critical sectors (e.g., bootloader config) while allowing runtime updates to user data areas |
| Self-timed 5 ms max write cycle | Eliminates need for external delay timers or polling loops; RDSR bit 0 indicates completion |
| HOLD pin functionality | Allows real-time interruption of EEPROM access during high-priority MCU interrupts without bus reinitialization |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed via SPI during boot and runtime reconfiguration. Use Value: Ensures deterministic startup behavior and field-upgradable settings without requiring battery-backed SRAM or external flash management. | Use Scenario: Retaining seat position memory, mirror angle presets, and lighting profiles across ignition cycles in mid-tier vehicles. IC Role / Device Role / Timing Role: Dedicated parameter EEPROM interfaced to 8-bit or 32-bit automotive MCU over 3.3 V SPI bus. Use Value: Meets AEC-Q100 stress requirements and provides 100-year data retention for customer personalization data. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Holding calibrated flow-rate coefficients and safety limit values that must survive power loss and meet ISO 13485 traceability requirements. IC Role / Device Role / Timing Role: Secure, write-protected memory segment storing certified calibration constants accessed only during service mode. Use Value: Enables regulatory-compliant recalibration without exposing full memory to field software; WP pin physically disables writes during normal operation. | Use Scenario: Storing minor firmware patches or tariff table updates in utility-grade electricity meters with limited onboard flash resources. IC Role / Device Role / Timing Role: Field-updatable auxiliary code/data store accessed via isolated SPI interface during OTA update windows. Use Value: Supports secure, atomic patch writes using page-mode and status-register verification, reducing risk of corruption during brown-out events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95320-DRMN3TP/K | 32 Kbit SPI EEPROM, 1.8–5.5 V supply, 20 MHz max clock, same 8-lead SOIC package, but uses different status register layout and lacks HOLD pin | Supports identical memory density and voltage range but does not support hold-suspend functionality required in interrupt-sensitive systems | Select when HOLD is unused and STMicroelectronics supply chain preference applies |
| BR24G32FJ-3GE2 | 32 Kbit I²C EEPROM, 1.7–5.5 V, 1 MHz max clock, 8-lead TSSOP, no WP/HOLD pins, uses two-wire interface instead of SPI | Requires I²C host interface and has lower bandwidth; unsuitable for high-speed logging but simplifies routing with fewer signals | Select for cost-sensitive, low-pin-count designs where SPI is unavailable and 1 MHz update rate is acceptable |
Compared with M95320-DRMN3TP/K and BR24G32FJ-3GE2, the AT25320AN-10SU-2.7 uniquely combines SPI Mode 0/3 compatibility, HOLD functionality for deterministic interrupt handling, and hardware WP pin support-making it optimal for real-time industrial and automotive control nodes requiring robust, low-latency nonvolatile storage.
Availability
AT25320AN-10SU-2.7 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply across extended product lifecycles.
Supply support for AT25320AN-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 is a global provider of microcontrollers, analog components, and memory solutions, with leadership in embedded control and secure authentication technologies.
The AT25320AN-10SU-2.7 belongs to Microchip's AT25xxxA family of SPI serial EEPROMs, designed specifically for reliable, low-power, pin-efficient nonvolatile storage in industrial, automotive, and medical systems where data integrity and long-term retention are critical.
FAQ
What is the memory organization of the AT25320AN-10SU-2.7?
The AT25320AN-10SU-2.7 contains 32,768 bits of EEPROM memory, organized as 4096 words × 8 bits. This structure supports byte-aligned read/write operations and efficient addressing using 12-bit addresses (A11–A0), directly matching common microcontroller memory-mapped access patterns. Each write operation affects one or more contiguous bytes within a 32-byte page boundary.
Does the AT25320AN-10SU-2.7 support both SPI Mode 0 and Mode 3?
Yes, the AT25320AN-10SU-2.7 supports both SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1), as confirmed in its official datasheet. Mode 0 is the default and most widely used; Mode 3 allows interoperability with certain legacy or specialized controllers. The device operates as a slave and requires proper CS assertion before clocking begins in either mode.
What is the purpose of the HOLD pin on the AT25320AN-10SU-2.7?
The HOLD pin on the AT25320AN-10SU-2.7 allows temporary suspension of an ongoing SPI transaction without resetting the internal address counter or command state. When asserted low while SCK is low, it places SO in high-impedance and ignores SI inputs until de-asserted. This enables deterministic handling of high-priority MCU interrupts without corrupting EEPROM transfers.
How does write protection work on the AT25320AN-10SU-2.7?
Write protection on the AT25320AN-10SU-2.7 operates through dual mechanisms: hardware via the WP pin (when WPEN = 1 and WP = low) and software via BP0/BP1 bits in the status register. These bits define four protection levels (none, 1/4, 1/2, or full array). Protection is nonvolatile and persists across power cycles, ensuring critical configuration data remains immutable unless explicitly disabled.
Is the AT25320AN-10SU-2.7 suitable for automotive applications?
Yes, the AT25320AN-10SU-2.7 is qualified for automotive use with an operating temperature range of –40 °C to +85 °C and compliance with AEC-Q100 stress testing requirements. Its 1 million write endurance, 100-year data retention, and robust SPI interface make it appropriate for body control modules, infotainment settings storage, and ADAS calibration data retention in passenger vehicles.
AT25320AN-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:
- 32Kbit
- Memory Organization:
- 4K 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
AT25320AN-10SU-2.7 FAQ
1.How can I place an order for AT25320AN-10SU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25320AN-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 AT25320AN-10SU-2.7 reliable?
The price and inventory of AT25320AN-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 AT25320AN-10SU-2.7 is usually 5 days.
3.What payment methods are accepted for AT25320AN-10SU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25320AN-10SU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25320AN-10SU-2.7?
AT25320AN-10SU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25320AN-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 AT25320AN-10SU-2.7?
For technical support, including AT25320AN-10SU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25320AN-10SU-2.7 requirements.
6.How does Aetrix verify that AT25320AN-10SU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT25320AN-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 AT25320AN-10SU-2.7 meets industry standards.
7.What is the process for return or replacement of AT25320AN-10SU-2.7?
All AT25320AN-10SU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT25320AN-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 AT25320AN-10SU-2.7 part is unused and in its original packaging.
Return procedure for AT25320AN-10SU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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