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Microchip Technology AT25320-10PI
- Part No.:
- AT25320-10PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT25320-10PI.pdf
- Description:
- IC EEPROM 32KBIT SPI 3MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,114
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Product details
Overview
AT25320-10PI from Atmel is a 32-Kbit SPI serial EEPROM organized as 4096 × 8-bit memory, rated for industrial temperature (−40°C to +85°C), supporting 2.7–5.5 V operation, 3.0 MHz clock rate at 5 V, and 32-byte page write mode with block write protection. It serves as nonvolatile configuration storage in microcontroller-based industrial control modules.
For engineers reviewing the AT25320-10PI datasheet, AT25320-10PI pinout, AT25320-10PI application, or AT25320-10PI equivalent, key selection criteria include industrial-grade temperature range, hardware/software write protection via WP pin and status register, SPI Mode 0/3 compatibility, self-timed 5 ms typical write cycle, and endurance of one million write cycles.
Technical Context
The AT25320-10PI operates as an SPI slave device with dedicated SI (input) and SO (output) pins, requiring CS low to initiate communication and supporting MSB-first data transfer. Its instruction set includes WREN, WRDI, RDSR, WRSR, READ, and WRITE, all synchronized to SCK edges with strict timing constraints on tWH, tWL, tSU, and tH.
Block write protection is implemented via nonvolatile BP0/BP1 bits in the status register, enabling protection of 0%, 25%, 50%, or 100% of the memory array. The HOLD pin suspends ongoing serial transfers without resetting the sequence, while the WP pin-when enabled via WPEN bit-blocks status register writes during low assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32 Kbit (4096 × 8-bit), sufficient for firmware parameter tables or calibration data in embedded controllers |
| Supply Voltage Range | 2.7 V to 5.5 V - supports dual-rail systems and brown-out tolerant designs |
| Max Clock Frequency | 3.0 MHz at 5 V - enables fast configuration reads without CPU bus contention |
| Write Cycle Time | 5 ms typical - defines minimum interval between successive page writes |
| Endurance | 1 million write cycles - ensures >10 years of daily reconfiguration in industrial logging applications |
| Data Retention | 100 years - guarantees long-term integrity of stored calibration or security keys |
| Operating Temperature | −40°C to +85°C - qualified for under-hood automotive ECUs and factory-floor PLCs |
Pinout & Package
AT25320-10PI is supplied in an 8-pin PDIP (package code 8P3), 0.300" wide, with standard JEDEC pinout and through-hole mounting compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable: must be low for all SPI transactions; high impedance on SO when CS high |
| SCK | Serial Clock | Master-generated clock; timing-critical input governing tWH/tWL and data sampling edges |
| SI | Serial Data Input | Receives op-codes, addresses, and write data; ignored during HOLD or write cycles |
| SO | Serial Data Output | Drives read data and status bits; tri-states when CS high or during HOLD |
| GND | Ground Reference | Signal and power return path; must be low-impedance to meet tV and VOL specs |
| VCC | Power Supply | 2.7–5.5 V supply; decoupling capacitor required per AC characteristics (CL = 100 pF) |
| WP | Write Protect | Hardware lock for status register when WPEN = 1; no effect if WPEN = 0 |
| HOLD | Communication Suspend | Pauses SPI transfer mid-sequence when pulled low with SCK low; preserves address counter |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Support | Compatible with legacy 68HC11 and modern ARM Cortex-M SPI peripherals without mode translation logic |
| 32-byte Page Write | Enables burst programming of configuration blocks while minimizing write latency vs. byte-by-byte writes |
| Four-Tier Block Protection | BP0/BP1 bits allow selective lockdown of memory regions-e.g., protect calibration sector while updating logs |
| Self-timed Write Cycle | No external erase command needed; internal timing eliminates need for software delay loops or polling overhead |
| Industrial Temperature Rating | Validated operation across −40°C to +85°C ensures reliability in uncontrolled environments like motor drives or HVAC controls |
Applications
| Industrial PLC Configuration Storage | Automotive ECU Calibration Memory |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning parameters, and fault history in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile configuration EEPROM interfaced directly to SPI bus of ARM-based PLC main controller. Use Value: Enables field-updatable settings without battery-backed SRAM; 1M endurance supports daily parameter adjustments over 10+ years. |
Use Scenario: Holding engine calibration maps, sensor offsets, and adaptive learning values in engine control units operating under hood temperatures. IC Role / Device Role / Timing Role: SPI-connected persistent memory for safety-critical calibration data, accessed during boot and runtime. Use Value: Industrial temp rating (−40°C to +85°C) and 100-year retention ensure map integrity across vehicle lifetime without refresh. |
| Medical Device Parameter Backup | Smart Meter Firmware Settings |
Use Scenario: Preserving user-configured alarm thresholds, dose limits, and operational modes in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-power SPI EEPROM used during power-down save/restore sequences in battery-operated devices. Use Value: 0.2 µA standby current at 2.7 V extends battery life; WP/HOLD pins support safe concurrent MCU operation and memory access. |
Use Scenario: Securing tariff schedules, metering constants, and tamper-event logs in ANSI C12.19-compliant electricity meters. IC Role / Device Role / Timing Role: Protected memory node on isolated SPI bus, with BP bits locking critical billing registers. Use Value: Hardware write protection (WP pin + WPEN) prevents unauthorized modification of revenue-critical data fields. |
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, 2.5–5.5 V, 20 MHz max clock, 5 ms write time, same 8-lead SOIC package | Higher speed and broader voltage range; lacks HOLD pin and 1.8 V option | Preferred where faster read/write throughput is required and HOLD functionality is unused |
| 25AA320A-I/P | 32 Kbit SPI EEPROM, 1.8–5.5 V, 10 MHz max clock, 5 ms write time, 8-pin PDIP package | Same industrial temp grade and PDIP footprint; supports 1.8 V operation not available in AT25320-10PI | Best choice when system operates down to 1.8 V or requires Microchip's AEC-Q100-qualified variants |
Compared with M95320-WMN6TP and 25AA320A-I/P, the AT25320-10PI offers unique HOLD pin functionality for interrupt-safe SPI pauses and robust industrial-temperature validation at 2.7–5.5 V, making it optimal for deterministic real-time control systems where communication suspension and environmental resilience are critical.
Availability
AT25320-10PI is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, medical diagnostics, smart meters, and factory automation systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT25320-10PI 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
Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and secure authentication ICs.
The AT25320-10PI belongs to Atmel's SPI Serial EEPROM family, designed for reliable, low-power, pin-efficient nonvolatile storage in resource-constrained embedded systems requiring industrial-grade environmental tolerance.
FAQ
What is the operating temperature range of the AT25320-10PI?
The AT25320-10PI is rated for industrial temperature operation from −40°C to +85°C. This specification is confirmed in the AT25080/160/320/640 ordering information table, where "AT25320-10PI" is explicitly listed under the Industrial (−40°C to +85°C) operation range column. The device undergoes full characterization across this range for all DC and AC parameters.
Does the AT25320-10PI support 1.8 V operation?
No, the AT25320-10PI does not support 1.8 V operation. Its specified supply voltage range is 2.7 V to 5.5 V, as indicated by the "-10PI" suffix (denoting industrial grade with 2.7–5.5 V operation) and confirmed in the DC Characteristics table (VCC2 min = 2.7 V). For 1.8 V operation, Atmel offers the AT25320-10PI-1.8 variant, which carries a distinct part number.
How many write cycles can the AT25320-10PI endure?
The AT25320-10PI guarantees 1 million write cycles per memory location, as stated in the Features section and verified in the Endurance specification (5.0 V, 25°C, Page Mode). This endurance applies to both byte and page write operations and is validated across the full industrial temperature range.
What package type is used for the AT25320-10PI?
The AT25320-10PI is packaged in an 8-pin PDIP (Plastic Dual Inline Package), designated as package code 8P3 per Atmel's ordering information. This is a through-hole, 0.300" wide package with JEDEC-standard pinout and dimensions, fully documented in the Packaging Information section.
Can the AT25320-10PI be used with SPI Mode 1 or Mode 2?
No, the AT25320-10PI only supports SPI Modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1), as explicitly stated in the Features section. It does not support Mode 1 or Mode 2 due to fixed sampling and setup timing relative to SCK edges, which are defined for Mode 0/3 only in the AC Characteristics table.
AT25320-10PI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT25320-10PI FAQ
1.How can I place an order for AT25320-10PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25320-10PI 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 AT25320-10PI reliable?
The price and inventory of AT25320-10PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25320-10PI is usually 5 days.
3.What payment methods are accepted for AT25320-10PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25320-10PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25320-10PI?
AT25320-10PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25320-10PI 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 AT25320-10PI?
For technical support, including AT25320-10PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25320-10PI requirements.
6.How does Aetrix verify that AT25320-10PI is sourced from the original manufacturer or authorized distributors?
All AT25320-10PI 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 AT25320-10PI meets industry standards.
7.What is the process for return or replacement of AT25320-10PI?
All AT25320-10PI units undergo pre-shipment inspection (PSI). If there is an issue with AT25320-10PI, 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 AT25320-10PI part is unused and in its original packaging.
Return procedure for AT25320-10PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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