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Microchip Technology AT25320W-10SI-2.7
- Part No.:
- AT25320W-10SI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25320W-10SI-2.7.pdf
- Description:
- IC EEPROM 32KBIT SPI 3MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,995
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Product details
Overview
AT25320W-10SI-2.7 from Microchip Technology (formerly Atmel) is a 32-Kbit SPI serial EEPROM organized as 4096 words × 8 bits, operating from 2.7V to 5.5V, supporting 3.0 MHz clock rate at 5V, with 32-byte page write and hardware/software write protection via WP pin and status register. It is used in industrial control systems for nonvolatile parameter storage.
For engineers reviewing the AT25320W-10SI-2.7 datasheet, AT25320W-10SI-2.7 pinout, AT25320W-10SI-2.7 application, or AT25320W-10SI-2.7 equivalent, key selection considerations include voltage range compatibility (2.7–5.5 V), SPI Mode 0/3 support, block write protection granularity (1/4, 1/2, full array), self-timed 5 ms typical write cycle, and JEDEC SOIC-8 packaging.
Technical Context
The AT25320W-10SI-2.7 implements a synchronous SPI slave interface with separate SI (input) and SO (output) pins, MSB-first data transfer, and chip-select–driven command protocol. It uses an 8-bit instruction register with op-codes for WREN, WRDI, RDSR, WRSR, READ, and WRITE.
Block write protection is configured via nonvolatile BP0/BP1 bits in the status register, enabling protection of 0%, 25%, 50%, or 100% of the memory array. Hardware write protection is enabled only when WPEN = 1 and WP pin is low; otherwise, software-only protection applies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32 Kbit (4096 × 8), sufficient for firmware configuration tables or calibration data storage |
| Supply Voltage Range | 2.7 V to 5.5 V - supports mixed-voltage system integration without level shifters |
| Max Clock Frequency | 3.0 MHz at VCC = 5.0 V - enables fast parameter reads in real-time control loops |
| Write Cycle Time | 5 ms typical - defines minimum interval between successive page writes |
| Endurance | 1 million write cycles - ensures long-term reliability in logging or counter applications |
| Data Retention | 100 years - guarantees data integrity over product lifetime without refresh |
| Operating Temperature | −40°C to +85°C - qualified for industrial ambient environments |
Pinout & Package
AT25320W-10SI-2.7 is packaged in an 8-lead JEDEC SOIC (8S1), 0.150" wide body, surface-mount package with standard gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be low to accept commands and data on SI/SCK |
| SCK | Serial Clock | Input clock synchronizing all SPI transfers; supports Modes 0 and 3 |
| SI | Serial Data Input | Command, address, and data input path; MSB-first, sampled on SCK rising/falling edge per mode |
| SO | Serial Data Output | Read data output; high-impedance when CS high or during HOLD |
| WP | Write Protect | Hardware lock for status register and protected memory blocks when WPEN = 1 |
| HOLD | Communication Suspend | Pauses ongoing SPI transaction without resetting internal state; requires SCK low to assert |
| GND | Ground Reference | Return path for VCC and all I/O signals; must be low-impedance for noise immunity |
| VCC | Power Supply | Single supply input; powers core logic and I/O buffers across full 2.7–5.5 V range |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode Compatibility | Supports both Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) - interoperable with diverse microcontrollers including 68HC11 and ARM Cortex-M SPI peripherals |
| Page Write Capability | 32-byte burst programming - reduces write overhead vs. byte-wise writes; address auto-increments within page boundary |
| Flexible Block Protection | Four protection levels (none, 1/4, 1/2, full array) controlled by BP0/BP1 bits - allows selective locking of critical configuration sectors |
| Dual Write Protection | Combines hardware (WP pin) and software (WRSR + WREN) mechanisms - prevents accidental writes during power transients or firmware bugs |
| Low-Power Standby | 0.2 µA typical ISB2 at 2.7 V - minimizes quiescent current in battery-backed or energy-sensitive systems |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing calibrated sensor offsets, I/O mapping, and user-defined logic parameters in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via SPI during boot and runtime reconfiguration. Use Value: Enables field-upgradable settings without firmware reflashing; 100-year retention ensures data persistence across equipment lifecycle. | Use Scenario: Holding door lock timing profiles, mirror position presets, and lighting dimming curves in automotive BCMs. IC Role / Device Role / Timing Role: SPI-connected parameter store interfacing with 8-bit or 32-bit automotive MCUs under AEC-Q100 stress conditions. Use Value: Automotive-grade qualification and 1M endurance support repeated personalization cycles over vehicle lifetime. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Parameters |
Use Scenario: Securing drug delivery rate tables, alarm thresholds, and maintenance logs in Class II medical devices. IC Role / Device Role / Timing Role: Protected EEPROM storing safety-critical calibration constants accessible only after WREN and status register verification. Use Value: Block write protection prevents corruption of dose-calibration data; WP pin hardening adds fail-safe layer during power brownouts. | Use Scenario: Storing tariff schedules, metering history, and communication keys in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Low-power, high-reliability memory for secure parameter updates over PLC or RF links. Use Value: 2.7–5.5 V operation matches meter power rails; 5 ms write time enables rapid OTA parameter commits without interrupting metering accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95320-WMN6TP | STMicroelectronics 32-Kbit SPI EEPROM; identical 2.7–5.5 V range and 8-lead SOIC-8 package; supports same SPI modes but lacks HOLD pin functionality | No HOLD pin limits use in multi-master or interrupt-driven SPI contexts requiring pause/resume capability | Select when HOLD is unused and ST's qualification or supply chain preference drives sourcing |
| CAT25320VI-GT3 | ON Semiconductor 32-Kbit SPI EEPROM; same voltage range and SOIC-8 package; includes HOLD pin but specifies 20 ms max tWC vs. AT25320W-10SI-2.7's 10 ms max | Slower worst-case write cycle may impact high-frequency parameter update throughput in real-time systems | Prefer where ON Semi's automotive qualification or long-term availability outweighs 5 ms typical write advantage |
Compared with M95320-WMN6TP and CAT25320VI-GT3, AT25320W-10SI-2.7 delivers faster typical write performance (5 ms), guaranteed HOLD functionality, and finer-grained block protection control - making it optimal for industrial systems requiring deterministic timing and robust communication resilience.
Availability
AT25320W-10SI-2.7 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, medical device calibration, and smart metering applications requiring stable component supply and long-term obsolescence management.
Supply support for AT25320W-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 is a global semiconductor company specializing in microcontrollers, analog, FPGA, and memory solutions, with broad industrial and automotive qualification portfolios.
The AT25320W-10SI-2.7 belongs to Microchip's legacy Atmel SPI EEPROM family, designed for reliable, low-voltage nonvolatile data storage in space-constrained embedded systems requiring SPI simplicity and robust write protection.
FAQ
What is the memory organization of the AT25320W-10SI-2.7?
The AT25320W-10SI-2.7 contains 32,768 bits of serial EEPROM memory, organized as 4096 words × 8 bits. This structure supports byte-aligned read/write operations and efficient page-based programming of up to 32 bytes per command. The memory map is linear with no internal banking, and addresses wrap on overflow during continuous read sequences.
Does the AT25320W-10SI-2.7 support both SPI Mode 0 and Mode 3?
Yes, the AT25320W-10SI-2.7 explicitly supports SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1), as confirmed in its official datasheet. This dual-mode compatibility allows direct interfacing with a wide range of microcontrollers including legacy 68HC11 derivatives and modern ARM-based SoCs without protocol translation.
How does write protection work on the AT25320W-10SI-2.7?
The AT25320W-10SI-2.7 implements two-tier write protection: software-controlled via the status register (BP0/BP1 bits for 1/4, 1/2, or full array lock) and hardware-enforced via the WP pin when WPEN = 1. Both mechanisms must be satisfied for writes to unprotected regions; the WP pin has no effect unless WPEN is set, allowing flexible system-level protection strategies.
What is the maximum clock frequency supported by the AT25320W-10SI-2.7 at 3.3 V?
At VCC = 3.3 V, the AT25320W-10SI-2.7 supports up to 2.1 MHz SCK frequency, as specified in its AC Characteristics table for the 2.7–5.5 V voltage range. This is lower than its 3.0 MHz rating at 5.0 V but remains sufficient for most industrial SPI interfaces operating at 3.3 V logic levels.
Is the AT25320W-10SI-2.7 qualified for automotive applications?
The base AT25320W-10SI-2.7 is rated for industrial temperature range (−40°C to +85°C) and is not automotive-qualified. However, Microchip offers automotive-grade variants (e.g., AT25320AN-10SI-2.7) with AEC-Q100 qualification. For automotive use, confirm part number suffixes indicating automotive qualification before design-in.
AT25320W-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:
- 3 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
AT25320W-10SI-2.7 FAQ
1.How can I place an order for AT25320W-10SI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25320W-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 AT25320W-10SI-2.7 reliable?
The price and inventory of AT25320W-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 AT25320W-10SI-2.7 is usually 5 days.
3.What payment methods are accepted for AT25320W-10SI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25320W-10SI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25320W-10SI-2.7?
AT25320W-10SI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25320W-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 AT25320W-10SI-2.7?
For technical support, including AT25320W-10SI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25320W-10SI-2.7 requirements.
6.How does Aetrix verify that AT25320W-10SI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT25320W-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 AT25320W-10SI-2.7 meets industry standards.
7.What is the process for return or replacement of AT25320W-10SI-2.7?
All AT25320W-10SI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT25320W-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 AT25320W-10SI-2.7 part is unused and in its original packaging.
Return procedure for AT25320W-10SI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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