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Microchip Technology AT25320AN-10SI-2.7-T
- Part No.:
- AT25320AN-10SI-2.7-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25320AN-10SI-2.7-T.pdf
- Description:
- IC EEPROM 32KBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,382
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Product details
Overview
AT25320AN-10SI-2.7-T from Microchip Technology (formerly Atmel) is a 32-Kbit SPI serial EEPROM organized as 4096 × 8 bits, operating from 2.7V to 5.5V with 20 MHz max clock rate at 5V, 32-byte page write capability, and automotive-grade extended temperature support (−40°C to +125°C). It serves as nonvolatile configuration storage in microcontroller-based industrial control modules.
For engineers reviewing the AT25320AN-10SI-2.7-T datasheet, AT25320AN-10SI-2.7-T pinout, AT25320AN-10SI-2.7-T application, or AT25320AN-10SI-2.7-T equivalent, key selection criteria include VCC range compatibility (2.7–5.5V), 125°C extended temperature rating, JEDEC SOIC-8 package footprint, hardware/software write protection, and 1 million write cycle endurance.
Technical Context
The AT25320AN-10SI-2.7-T implements a synchronous SPI slave interface compliant with Modes 0 and 3, using separate SI/SO lines and supporting MSB-first data transfer. Its internal architecture includes an 8-bit instruction register, status register with BP0/BP1 block protection bits, and nonvolatile WPEN bit enabling hardware write protect via the WP pin.
It features self-timed internal write cycles (≤5 ms), no external erase requirement, and supports suspend/resume of serial communication via the HOLD pin while CS is active. Block write protection covers 0%, 25%, 50%, or 100% of the memory array depending on BP0/BP1 settings, with independent software (WRSR) and hardware (WP pin) control paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32 Kbit (4096 × 8), sufficient for firmware parameter tables or calibration data in compact embedded systems |
| Interface | SPI slave (Modes 0 & 3), compatible with standard MCU SPI peripherals without protocol translation |
| VCC Range | 2.7V to 5.5V - supports direct connection to 3.3V or 5V logic domains without level shifting |
| Max Clock Rate | 20 MHz at 5V - enables fast bulk reads/writes (e.g., 32-byte page write in ~1.6 µs per byte) |
| Write Endurance | 1 million cycles - suitable for logging or counter applications with frequent updates |
| Data Retention | 100 years at 25°C - ensures long-term reliability in unattended equipment |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and outdoor infrastructure |
| Package | 8-lead JEDEC SOIC (8S1), 0.150" wide - industry-standard footprint with proven manufacturability and thermal performance |
Pinout & Package
AT25320AN-10SI-2.7-T uses an 8-lead JEDEC SOIC (8S1) package: 4.80–5.00 mm body width, 5.79–6.20 mm body length, 1.27 mm lead pitch, and 0.31–0.51 mm lead thickness. Pin 1 is marked by a beveled corner or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be low to accept instructions; high impedance on SO when high |
| SCK | Serial Clock | Input-only master-generated clock; defines timing for SI sampling and SO output edges |
| SI | Serial Data Input | Instruction/address/data input path; ignored during HOLD or when CS is high |
| SO | Serial Data Output | Tri-state output; driven only when CS is low and instruction requires readback (e.g., READ, RDSR) |
| 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 (2.7–5.5V); powers internal logic, memory array, and I/O buffers |
| WP | Write Protect | Hardware lock: disables status register writes when WP=low and WPEN=1; overrides software commands |
| HOLD | Communication Suspend | Pauses ongoing SPI transaction without resetting address counter; requires SCK=low to assert |
Key Features
| Feature | Design Value |
|---|---|
| Page Write Mode | 32-byte burst writes reduce total programming time vs. byte-by-byte writes, improving system responsiveness |
| Block Write Protection | Configurable 0%/25%/50%/100% memory locking via status register - prevents accidental overwrites of critical firmware sections |
| Dual Write Protection | Combines hardware (WP pin) and software (WREN/WRSR) mechanisms for layered security against corruption |
| Extended Temperature Range | −40°C to +125°C operation validated per AEC-Q100 stress tests - suitable for engine control units and power inverters |
| Low Standby Current | ≤2.0 µA at 5.0V/CS=VCC - minimizes battery drain in always-on monitoring systems |
| Lead-free/Halogen-free | RoHS-compliant packaging (per ordering suffix -SU/-SE) - meets environmental compliance for global OEM shipments |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing calibrated sensor offsets, I/O mapping tables, 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 logic without requiring flash reprogramming; 125°C rating ensures reliability near industrial heat sources. |
Use Scenario: Holding door lock actuator profiles, lighting dimming curves, and seat position presets in vehicle BCMs. IC Role / Device Role / Timing Role: SPI EEPROM providing persistent storage for user preferences and safety-critical calibration data. Use Value: Automotive-grade temperature range and 1M-cycle endurance support lifetime recalibration and OTA updates. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Parameters |
Use Scenario: Storing flow rate calibration coefficients, alarm thresholds, and maintenance logs in Class II medical devices. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for regulatory-mandated traceability data. Use Value: Hardware write protection (WP pin) prevents unauthorized modification of safety-critical parameters during service. |
Use Scenario: Retaining tariff schedules, metering constants, and communication keys in ANSI C12.19-compliant smart meters. IC Role / Device Role / Timing Role: SPI-accessible nonvolatile memory for secure parameter storage with cryptographic key isolation. Use Value: 100-year data retention ensures accuracy across 20+ year meter deployments without data migration. |
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, 1.8–5.5V VCC, 20 MHz @ 5V, TSSOP-8 package, same 1M endurance/100y retention | Broader voltage range (1.8V min) but lacks −40°C to +125°C automotive qualification; rated −40°C to +85°C only | Select for cost-sensitive industrial designs where extended temperature is not required |
| BR24T32FJ-WE2 | 32 Kbit SPI EEPROM, 1.7–5.5V VCC, 10 MHz max, 8-pin SOP package, 1M endurance, 100y retention, AEC-Q100 Grade 2 (−40°C to +105°C) | Lower max clock (10 MHz), narrower temp range (105°C max), different pinout (SO pin = pin 2 vs. pin 2 on AT25320A) | Select when AEC-Q100 Grade 2 suffices and lower speed is acceptable; verify PCB layout compatibility |
Compared with M95320-DRMN3TP/K and BR24T32FJ-WE2, the AT25320AN-10SI-2.7-T uniquely delivers full AEC-Q100 Grade 1 qualification (−40°C to +125°C) in JEDEC SOIC-8, enabling drop-in use in high-temperature automotive ECUs where both speed and thermal margin are critical.
Availability
AT25320AN-10SI-2.7-T is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, medical instrumentation, and smart metering applications requiring stable component supply across long product lifecycles.
Supply support for AT25320AN-10SI-2.7-T 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 its legacy memory portfolio with full datasheet, tooling, and qualification continuity.
The AT25320AN-10SI-2.7-T belongs to the AT25xxxA SPI EEPROM family, designed specifically for robust, low-power nonvolatile storage in harsh-environment embedded systems requiring guaranteed data integrity.
FAQ
What is the maximum clock frequency supported by the AT25320AN-10SI-2.7-T?
The AT25320AN-10SI-2.7-T supports up to 20 MHz SCK frequency when VCC = 5.0V, 10 MHz at VCC = 2.7V–3.6V, and 5 MHz at VCC = 1.8V–2.6V. These values are specified in the AC Characteristics table and reflect guaranteed timing margins across temperature and voltage ranges. The AT25320AN-10SI-2.7-T must operate within these limits to ensure reliable read/write operations.
Does the AT25320AN-10SI-2.7-T require an external erase cycle before writing?
No, the AT25320AN-10SI-2.7-T performs fully self-timed write cycles with no separate erase step required. Each WRITE instruction automatically erases and programs the target byte(s) in ≤5 ms. This simplifies firmware design and eliminates erase-related timing overhead compared to parallel EEPROMs or flash memory.
How does hardware write protection work on the AT25320AN-10SI-2.7-T?
Hardware write protection on the AT25320AN-10SI-2.7-T is enabled when the WP pin is pulled low AND the WPEN bit in the status register is set to "1". When active, it blocks all writes to the status register (including BP0/BP1) and protected memory blocks. If WPEN = "0", the WP pin is ignored, allowing full software control - a key feature for systems where WP is hardwired to ground.
What is the memory organization of the AT25320AN-10SI-2.7-T?
The AT25320AN-10SI-2.7-T contains 32,768 bits organized as 4096 words × 8 bits. Addressing uses 12 bits (A11–A0), with A15–A12 as don't-care bits. This linear 4K-word map simplifies addressing in microcontroller drivers and enables seamless page writes across 32-byte boundaries without address wraparound within a page.
Is the AT25320AN-10SI-2.7-T qualified for automotive applications?
Yes, the AT25320AN-10SI-2.7-T is explicitly qualified for automotive use with extended temperature operation from −40°C to +125°C and is offered in lead-free/halogen-free variants (e.g., -SU, -SE suffixes). It meets AEC-Q100 stress test requirements for reliability in engine compartments and other high-thermal-load vehicle subsystems.
AT25320AN-10SI-2.7-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for AT25320AN-10SI-2.7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25320AN-10SI-2.7-T 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-T reliable?
The price and inventory of AT25320AN-10SI-2.7-T 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-T is usually 5 days.
3.What payment methods are accepted for AT25320AN-10SI-2.7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25320AN-10SI-2.7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25320AN-10SI-2.7-T?
AT25320AN-10SI-2.7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25320AN-10SI-2.7-T 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-T?
For technical support, including AT25320AN-10SI-2.7-T 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-T requirements.
6.How does Aetrix verify that AT25320AN-10SI-2.7-T is sourced from the original manufacturer or authorized distributors?
All AT25320AN-10SI-2.7-T 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-T meets industry standards.
7.What is the process for return or replacement of AT25320AN-10SI-2.7-T?
All AT25320AN-10SI-2.7-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25320AN-10SI-2.7-T, 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-T part is unused and in its original packaging.
Return procedure for AT25320AN-10SI-2.7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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