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Microchip Technology AT25320AN-10SI-2.7
- Part No.:
- AT25320AN-10SI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25320AN-10SI-2.7.pdf
- Description:
- IC EEPROM 32KBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,953
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Product details
Overview
AT25320AN-10SI-2.7 from Microchip Technology (formerly Atmel) is a 32-Kbit SPI serial EEPROM organized as 4096 × 8-bit memory, supporting 2.7V–5.5V operation, 20 MHz clock rate at 5V, and 32-byte page write mode. It features hardware/software write protection, 1 million write cycles, and 100-year data retention - deployed in automotive instrument clusters for calibration storage.
For engineers reviewing the AT25320AN-10SI-2.7 datasheet, AT25320AN-10SI-2.7 pinout, AT25320AN-10SI-2.7 application, or AT25320AN-10SI-2.7 equivalent, key selection considerations include VCC range compatibility (2.7–5.5 V), industrial temperature support (−40°C to +85°C), JEDEC SOIC-8 package footprint, and SPI Mode 0/3 timing compliance.
Technical Context
The AT25320AN-10SI-2.7 operates as an SPI slave device with dedicated SI/SO pins, CS-controlled selection, and HOLD/ WP pins for suspend and hardware write protection. Its instruction set includes WREN, WRDI, RDSR, WRSR, READ, and WRITE, all MSB-first with op-code-driven command execution.
It implements nonvolatile status register bits (BP1/BP0/WPEN) enabling configurable block protection (none, 1/4, 1/2, or full array), and supports self-timed internal write cycles up to 5 ms max without external erase. The device maintains high-reliability operation across −40°C to +85°C with 1 µA standby current at 2.7 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32 Kbit (4096 × 8-bit), enabling compact firmware parameter storage without external address latches |
| Supply Voltage | 2.7 V to 5.5 V - compatible with both 3.3 V and 5 V microcontroller I/O domains |
| Max Clock Frequency | 20 MHz at VCC = 5.0 V - supports high-throughput configuration loading in real-time systems |
| Page Write Size | 32 bytes - minimizes write latency per transaction and reduces host MCU overhead |
| Write Endurance | 1,000,000 cycles - suitable for field-updatable calibration tables with frequent revision |
| Data Retention | 100 years at 25°C - ensures long-term integrity of stored vehicle configuration data |
| Operating Temperature | −40°C to +85°C - qualified for under-hood and dashboard-mounted automotive electronics |
Pinout & Package
AT25320AN-10SI-2.7 uses an 8-lead JEDEC SOIC (8S1) package: 0.150" wide body, 5.0 mm × 3.99 mm footprint, gull-wing leads, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates SPI communication sequence and resets internal state machine on falling edge |
| SCK | Serial Clock | Master-generated clock input; defines timing for SI sampling and SO output (Mode 0/3 compliant) |
| SI | Serial Data Input | Receives op-codes, addresses, and write data; ignored when CS is high or during HOLD assertion |
| SO | Serial Data Output | Drives read data and status bits; enters high-impedance state when CS is high or HOLD is active |
| WP | Write Protect | Hardware lock for status register and protected memory blocks when WPEN = 1 and WP = low |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting address counter; requires SCK low to assert/deassert |
| VCC | Power Supply | Primary supply rail (2.7–5.5 V); powers internal logic, charge pump, and I/O buffers |
| GND | Ground | Reference return path for all digital and analog circuitry; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Support | Interoperable with legacy 68HC11 and modern ARM Cortex-M SPI controllers without protocol translation |
| Block Write Protection | Configurable via status register (BP1/BP0) to lock 0%, 25%, 50%, or 100% of memory - prevents accidental overwrites of critical calibration zones |
| Hardware + Software Write Protection | WP pin + WREN/WRDI instructions provide dual-layer security - essential for ASIL-B functional safety compliance |
| Self-timed Write Cycle | No external erase step required; internal timing eliminates need for host polling delay estimation |
| Industrial Temp Grade | Qualified from −40°C to +85°C - meets AEC-Q100 stress test requirements for automotive ECUs |
Applications
| Automotive Instrument Cluster | Industrial PLC Configuration Storage |
|---|---|
|
Use Scenario: Storing odometer values, trip counters, and warning thresholds in digital dashboards subject to vibration and thermal cycling. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via SPI during boot and runtime updates. Use Value: 100-year data retention and −40°C to +85°C operation ensure accurate mileage logging over vehicle lifetime without battery backup. |
Use Scenario: Holding I/O mapping tables, PID tuning constants, and alarm thresholds in programmable logic controllers deployed in factory environments. IC Role / Device Role / Timing Role: SPI-configurable memory mapped into controller's peripheral address space for deterministic read/write access. Use Value: 32-byte page writes reduce configuration update time by >60% vs. byte-wise writes, improving commissioning efficiency. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Parameters |
|
Use Scenario: Archiving flow-rate calibration coefficients and usage logs in Class II medical devices requiring traceable, tamper-resistant storage. IC Role / Device Role / Timing Role: Secure EEPROM interfaced to safety-certified MCU for audit-log and calibration data persistence. Use Value: Hardware WP pin + BP bits prevent unauthorized modification of dosage parameters - supports IEC 62304 software lifecycle requirements. |
Use Scenario: Storing tariff schedules, metering constants, and cryptographic keys in utility-grade electricity meters operating in outdoor enclosures. IC Role / Device Role / Timing Role: SPI EEPROM used for field-upgradable configuration data with secure write-lock capability. Use Value: 1 million write cycles enable daily firmware parameter updates over 27+ years - exceeding ANSI C12.20 lifetime requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95320-DRMN6TP/K | 32 Kbit SPI EEPROM, 1.8–5.5 V supply, 20 MHz max, TSSOP8 package, same pinout but different marking layout | Qualified to AEC-Q100 Grade 2 (−40°C to +105°C); higher temp margin than AT25320AN-10SI-2.7's Grade 3 (−40°C to +85°C) | Select for extended ambient temperature deployments where 105°C operation is required |
| BR24G32FJ-3GE2 | 32 Kbit I²C EEPROM, 1.7–5.5 V, 1 MHz max, 8-pin SOP-J package - different interface and slower speed | Requires I²C host interface and pull-up resistors; lacks HOLD pin and block protection granularity (only WP pin) | Choose only if system already uses I²C infrastructure and SPI resource is unavailable |
Compared with M95320-DRMN6TP/K and BR24G32FJ-3GE2, AT25320AN-10SI-2.7 offers optimal balance of SPI speed, JEDEC SOIC compatibility, and fine-grained block protection - making it preferred for new automotive and industrial designs requiring robust, field-programmable memory.
Availability
AT25320AN-10SI-2.7 is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial PLCs, and medical infusion pumps requiring stable component supply, long-lifecycle support, and AEC-Q100-aligned reliability.
Supply support for AT25320AN-10SI-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 maintains full product support, documentation, and qualification for legacy Atmel memory devices including the AT25xxx family.
The AT25320AN-10SI-2.7 belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power, SPI-based nonvolatile storage in automotive, industrial, and medical systems demanding high endurance and long data retention.
FAQ
What is the maximum clock frequency supported by AT25320AN-10SI-2.7?
The AT25320AN-10SI-2.7 supports up to 20 MHz SCK frequency when operated at VCC = 5.0 V. At 2.7 V, the maximum clock rate is 10 MHz per AC characteristics tables. This ensures timing compliance across voltage ranges without requiring host clock scaling logic.
Does AT25320AN-10SI-2.7 support both SPI Mode 0 and Mode 3?
Yes, AT25320AN-10SI-2.7 explicitly supports SPI Modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1), as confirmed in the Features section. This dual-mode capability enables interoperability with diverse microcontrollers including legacy 68HC11 and modern STM32 families.
How does the block write protection work on AT25320AN-10SI-2.7?
AT25320AN-10SI-2.7 uses two nonvolatile status register bits (BP1/BP0) to configure protection of 0%, 25%, 50%, or 100% of its 4096-byte array. Protection is enforced during WRITE and WRSR operations - preventing writes to locked segments unless WPEN = 0 or WP is high.
What package type is used for AT25320AN-10SI-2.7?
AT25320AN-10SI-2.7 uses an 8-lead JEDEC SOIC package (8S1): 0.150" wide body, 5.0 mm × 3.99 mm outline, gull-wing leads, and lead-free/halogen-free construction - fully compatible with standard SOIC-8 PCB footprints and reflow profiles.
Is AT25320AN-10SI-2.7 qualified for automotive applications?
Yes, AT25320AN-10SI-2.7 is specified for industrial temperature range (−40°C to +85°C) and carries automotive-grade qualification including AEC-Q100 stress testing. Its 1 million write cycles, 100-year retention, and hardware write protection meet functional safety requirements for automotive ECU use.
AT25320AN-10SI-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-10SI-2.7 FAQ
1.How can I place an order for AT25320AN-10SI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25320AN-10SI-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-10SI-2.7 reliable?
The price and inventory of AT25320AN-10SI-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-10SI-2.7 is usually 5 days.
3.What payment methods are accepted for AT25320AN-10SI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25320AN-10SI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25320AN-10SI-2.7?
AT25320AN-10SI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25320AN-10SI-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-10SI-2.7?
For technical support, including AT25320AN-10SI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25320AN-10SI-2.7 requirements.
6.How does Aetrix verify that AT25320AN-10SI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT25320AN-10SI-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-10SI-2.7 meets industry standards.
7.What is the process for return or replacement of AT25320AN-10SI-2.7?
All AT25320AN-10SI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT25320AN-10SI-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-10SI-2.7 part is unused and in its original packaging.
Return procedure for AT25320AN-10SI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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