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Microchip Technology AT25320W-10SC-2.7
- Part No.:
- AT25320W-10SC-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25320W-10SC-2.7.pdf
- Description:
- IC EEPROM 32KBIT SPI 3MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,724
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Product details
Overview
AT25320W-10SC-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 for automotive and industrial control systems.
For engineers reviewing the AT25320W-10SC-2.7 datasheet, AT25320W-10SC-2.7 pinout, AT25320W-10SC-2.7 application, or AT25320W-10SC-2.7 equivalent, key selection considerations include VCC range compatibility (2.7–5.5V), 32-byte page mode timing, block write protection granularity (1/4, 1/2, full array), WP/HOLD pin functionality, and JEDEC SOIC-8 package footprint.
Technical Context
The AT25320W-10SC-2.7 implements a synchronous SPI slave interface compliant with Modes 0 and 3, using separate SI and SO pins for full-duplex communication. It features an 8-bit instruction register with op-codes for WREN, WRDI, RDSR, WRSR, READ, and WRITE, all MSB-first with CS-driven framing.
Internal architecture includes nonvolatile status register bits (BP1/BP0/WPEN/RDY/WEN) controlling block protection and write enable state, with self-timed internal write cycles (5 ms typical) and no erase-before-write requirement. The HOLD pin suspends ongoing serial transfers without resetting sequence state, while WP enables hardware lock of status register and protected memory blocks when WPEN = 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32 Kbit (4096 × 8-bit words) - supports firmware parameter storage in space-constrained embedded nodes |
| Supply Voltage | 2.7V to 5.5V - interoperable with 3.3V and 5V microcontroller I/O domains without level shifting |
| Max Clock Rate | 3.0 MHz at VCC = 5.0V - enables fast configuration loading in real-time control loops |
| Page Write Size | 32 bytes - minimizes write latency per transaction and reduces host CPU overhead during bulk updates |
| Write Endurance | 1 million cycles - suitable for logging or calibration data updated daily over 27+ years |
| Data Retention | 100 years at 25°C - ensures long-term reliability in unattended infrastructure monitoring devices |
| Operating Temp | -40°C to +85°C - qualified for industrial automation and automotive under-hood auxiliary modules |
Pinout & Package
AT25320W-10SC-2.7 is supplied in an 8-lead JEDEC SOIC package (8S1), 0.150" wide body, with standard gull-wing lead form and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be low for serial command acceptance and SO output activation |
| SCK | Serial Clock | Master-generated clock input; defines timing for SI sampling and SO output edges per SPI Mode 0/3 |
| SI | Serial Data Input | Command/address/data input path; latched on SCK rising edge (Mode 0) or falling edge (Mode 3) |
| SO | Serial Data Output | Read data or status register output; high-impedance when CS high or during HOLD assertion |
| WP | Write Protect | Hardware lock for status register and protected memory blocks when WPEN = 1 and WP = low |
| HOLD | Communication Suspend | Pauses active serial transfer without resetting address counter; requires SCK low during assertion |
| GND | Ground Reference | Signal and power return plane; decoupling capacitor must be placed within 5 mm of VCC and GND pins |
| VCC | Power Supply | Primary supply rail (2.7–5.5V); current draw peaks at 5.0 mA during write operations at 2 MHz |
Key Features
| Feature | Design Value |
|---|---|
| Block Write Protection | Configurable via status register to protect 0%, 25%, 50%, or 100% of memory array - prevents accidental overwrite of critical calibration or security keys |
| Hardware + Software Write Lock | WP pin and WRSR instruction jointly control protection scope - enables field-upgradeable security policies without hardware modification |
| Self-timed Write Cycle | 5 ms typical duration with no external timing control required - simplifies host firmware by eliminating busy-wait polling complexity |
| SPI Mode Compatibility | Supports both Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) - interoperable with diverse MCU families including PIC, AVR, and ARM Cortex-M |
| HOLD Functionality | Suspends serial communication mid-transfer while preserving address counter state - allows time-critical interrupt servicing without data loss or re-synchronization |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and fault history logs in programmable logic controllers deployed in factory environments. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via SPI during boot and runtime reconfiguration events. Use Value: 100-year data retention and -40°C to +85°C operation ensure parameter integrity across decades of unattended operation in harsh industrial settings. | Use Scenario: Saving seat position presets, mirror angle calibrations, and lighting profiles in automotive body control units. IC Role / Device Role / Timing Role: SPI EEPROM providing persistent user preference storage independent of main ECU power cycling. Use Value: Block write protection prevents corruption of safety-critical settings during software updates or voltage transients on the vehicle battery rail. |
| Medical Device Calibration Data | Smart Energy Meter Firmware Parameters |
Use Scenario: Holding sensor offset/gain coefficients and regulatory compliance flags in portable diagnostic equipment requiring traceable calibration records. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for certified calibration data accessed only during device initialization or service mode. Use Value: WPEN-controlled hardware write lock ensures calibration values remain immutable unless explicitly enabled via authenticated service interface. | Use Scenario: Storing tariff schedules, metering constants, and communication credentials in ANSI C12.19-compliant smart electricity meters. IC Role / Device Role / Timing Role: High-reliability serial EEPROM interfacing with metrology SoC over dedicated SPI bus. Use Value: 1 million write cycles support daily firmware patching and utility-initiated parameter updates over 27+ years of field deployment. |
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 | 32 Kbit SPI EEPROM, 2.5–5.5V supply, 20 MHz max clock, 5 ms write cycle, SOIC-8 package | Higher clock speed supports faster bulk writes; identical protection scheme and endurance | Select when system clock exceeds 3 MHz or requires tighter tWH/tWL timing margins |
| CAT25320VI-GT3 | 32 Kbit SPI EEPROM, 1.8–5.5V supply, 10 MHz max clock, 5 ms write cycle, SOIC-8 package | Broadest VCC range enables single-BOM use across 1.8V and 3.3V platforms; same pinout and instruction set | Select for multi-voltage designs or where 1.8V operation below 2.7V is required |
Compared with AT25320W-10SC-2.7, M95320-WMN6TP offers higher-speed SPI throughput but shares identical memory organization and protection logic, while CAT25320VI-GT3 extends low-voltage capability to 1.8V-enabling direct integration into ultra-low-power sensor nodes without voltage translation.
Availability
AT25320W-10SC-2.7 is available at Aetrix Electronics and suitable for industrial PLC configuration storage, automotive body control modules, medical device calibration data retention, smart energy meter firmware parameters, and embedded system boot configuration requiring stable component supply across extended temperature ranges.
Supply support for AT25320W-10SC-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 devices, and memory solutions, with a focus on embedded control and connectivity.
The AT25xxx family was designed for reliable, low-power serial data storage in resource-constrained embedded systems requiring SPI interface simplicity, robust write protection, and long-term data integrity across industrial and automotive environments.
FAQ
What is the maximum clock frequency supported by AT25320W-10SC-2.7?
The AT25320W-10SC-2.7 supports up to 3.0 MHz at VCC = 5.0V, 2.1 MHz at VCC = 2.7–3.6V, and 0.5 MHz at VCC = 1.8–2.6V. These values are specified in the AC Characteristics table and reflect guaranteed timing margins across temperature and voltage. The AT25320W-10SC-2.7 does not operate above 3.0 MHz even at 5V; exceeding this violates tWH/tWL specifications and risks data corruption.
Does AT25320W-10SC-2.7 support 1.8V operation?
No, AT25320W-10SC-2.7 is specifically rated for 2.7V to 5.5V operation, as indicated by the "-2.7" suffix in its ordering code. Devices with "-1.8" suffix (e.g., AT25320-10SI-1.8) support 1.8V–5.5V, but AT25320W-10SC-2.7 is not characterized or guaranteed for reliable operation below 2.7V.
How does the HOLD pin function during an active SPI read sequence?
During an active SPI read, asserting HOLD low while SCK is low pauses data output on SO and freezes the internal address counter. The AT25320W-10SC-2.7 retains full context-including byte address and instruction state-so resuming with HOLD high (while SCK remains low) continues transmission from the exact suspended point without reinitialization or address reset.
What memory protection levels are available on AT25320W-10SC-2.7?
The AT25320W-10SC-2.7 supports four block write protection levels via BP1/BP0 bits: unprotected (00), top 1/4 (01), top 1/2 (10), or full array (11). For the 32K device, these correspond to address ranges 0xC00–0xFFF, 0x800–0xFFF, and 0x000–0xFFF respectively. Protection applies only to write operations; reads remain fully accessible.
Is AT25320W-10SC-2.7 pin-compatible with other members of the AT25xxx family?
Yes, AT25320W-10SC-2.7 shares identical pinout, instruction set, and timing behavior with AT25080, AT25160, and AT25640 in the same SOIC-8 package (e.g., AT25160N-10SI-2.7). Memory size differences affect only address bit count (A11–A0 for AT25320 vs. A12–A0 for AT25640), but CS/SCK/SI/SO/WP/HOLD/GND/VCC assignments and electrical characteristics are fully consistent.
AT25320W-10SC-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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25320W-10SC-2.7 FAQ
1.How can I place an order for AT25320W-10SC-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25320W-10SC-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-10SC-2.7 reliable?
The price and inventory of AT25320W-10SC-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-10SC-2.7 is usually 5 days.
3.What payment methods are accepted for AT25320W-10SC-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25320W-10SC-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25320W-10SC-2.7?
AT25320W-10SC-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25320W-10SC-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-10SC-2.7?
For technical support, including AT25320W-10SC-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25320W-10SC-2.7 requirements.
6.How does Aetrix verify that AT25320W-10SC-2.7 is sourced from the original manufacturer or authorized distributors?
All AT25320W-10SC-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-10SC-2.7 meets industry standards.
7.What is the process for return or replacement of AT25320W-10SC-2.7?
All AT25320W-10SC-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT25320W-10SC-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-10SC-2.7 part is unused and in its original packaging.
Return procedure for AT25320W-10SC-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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