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Microchip Technology AT25320N-10SI-2.7
- Part No.:
- AT25320N-10SI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25320N-10SI-2.7.pdf
- Description:
- IC EEPROM 32KBIT SPI 3MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,245
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Product details
Overview
AT25320N-10SI-2.7 from Microchip Technology (formerly Atmel) is a 32-Kbit SPI serial EEPROM organized as 4096 × 8-bit words, operating from 2.7V to 5.5V with 3.0 MHz max clock rate at 5V, 32-byte page write capability, and hardware/software write protection via WP pin and status register. It serves in industrial control systems for parameter storage and calibration data retention.
For engineers reviewing the AT25320N-10SI-2.7 datasheet, AT25320N-10SI-2.7 pinout, AT25320N-10SI-2.7 application, or AT25320N-10SI-2.7 equivalent, key selection considerations include VCC range compatibility (2.7–5.5V), 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 with industrial temperature range (−40°C to +85°C).
Technical Context
The AT25320N-10SI-2.7 implements a synchronous SPI slave interface with dedicated SI (input), SO (output), SCK (clock), and CS (chip select) pins, supporting MSB-first transmission and op-code–driven command execution including WREN, WRITE, READ, RDSR, and WRSR. It requires no external erase cycle and uses an internal write state machine that blocks all commands except RDSR during programming.
Block write protection is controlled by nonvolatile BP0/BP1 bits in the status register, enabling selective locking of memory segments (0x0C00–0x0FFF for 1/4-array protection on AT25320), while the WPEN bit determines whether the WP pin actively inhibits status register writes. HOLD pin allows mid-transaction suspension without resetting the serial sequence.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32 Kbit (4096 × 8-bit words) - fixed address space requiring A11–A0 addressing |
| Supply Voltage Range | 2.7V to 5.5V - supports mixed-voltage system integration without level shifters |
| Max SPI Clock Frequency | 3.0 MHz at VCC = 5.0V - enables fast configuration reads in time-critical boot sequences |
| Page Write Size | 32 bytes - minimizes transaction overhead when updating contiguous calibration tables |
| Write Cycle Time | 5 ms typical - defines minimum interval between successive write operations |
| Endurance | 1 million write cycles - ensures long-term reliability in field-updatable firmware parameter storage |
| Data Retention | 100 years - guarantees nonvolatile storage integrity across product lifecycle |
Pinout & Package
AT25320N-10SI-2.7 is packaged in an 8-lead JEDEC SOIC (8S1), 0.150" wide body, with gull-wing leads and standard SOIC footprint compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be low for serial communication; high impedance on SO when CS high |
| SCK | Serial Clock | Input-only master-generated clock; timing critical for tWH/tWL (133 ns min at 5V) |
| SI | Serial Data Input | Receives op-codes, addresses, and data; MSB-first, sampled on SCK rising edge (Mode 0) |
| SO | Serial Data Output | Drives read data; high-impedance when CS high or during HOLD assertion |
| WP | Write Protect | Hardware lock for status register when WPEN = 1; no effect if WPEN = 0 |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting address counter; requires SCK low to assert |
| GND | Ground Reference | Return path for VCC and I/O; decoupling capacitor required within 10 mm of VCC/GND pins |
| VCC | Power Supply | Primary supply input; supports 2.7–5.5V operation; ISB2 = 0.2–2.0 µA standby current at 2.7V |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode Compatibility | Supports Modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1) - interoperable with diverse MCU SPI peripherals |
| Block Write Protection | Configurable 1/4, 1/2, or full array lock via BP0/BP1 bits - prevents accidental overwrite of critical firmware parameters |
| Hardware + Software Protection | WP pin + WRSR instruction enable dual-layer security - WPEN bit gates hardware protection, allowing flexible system-level lock strategies |
| Self-Timed Write Cycle | No external timing control needed; internal timer completes write in 5 ms typical - simplifies host firmware design |
| Industrial Temperature Range | −40°C to +85°C operation - validated for deployment in motor drives, PLC modules, and outdoor sensor nodes |
Applications
| Industrial PLC Configuration Storage | Automotive ECU Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning constants, and alarm thresholds in programmable logic controllers subject to frequent field updates. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via SPI during startup and maintenance mode; RDY/BUSY flag used to synchronize host polling. Use Value: 1M endurance and 100-year retention ensure reliable recalibration over 15+ year equipment lifespans without battery backup. |
Use Scenario: Holding engine trim values, sensor offset corrections, and emission control parameters in automotive powertrain ECUs. IC Role / Device Role / Timing Role: SPI slave device interfaced to ASIL-B–compliant microcontroller; WP pin tied to safety monitor circuit for fault-triggered write lock. Use Value: Block protection (BP1/BP0) isolates factory-programmed calibration zones from runtime updates, preventing corruption during OTA reprogramming. |
| Medical Device Setup Profiles | Smart Meter Firmware Parameters |
Use Scenario: Saving user-configured therapy settings, alarm limits, and device ID in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Low-power EEPROM accessed during boot and configuration changes; ISB2 ≤ 2.0 µA at 2.7V extends battery life in portable units. Use Value: 2.7–5.5V operation eliminates need for voltage regulators in multi-battery chemistries (Li-ion, alkaline, NiMH). |
Use Scenario: Storing tariff schedules, metering constants, and communication credentials in ANSI C12.22–compliant smart electricity meters. IC Role / Device Role / Timing Role: Secure parameter vault with HOLD pin used to pause SPI during RF burst transmission to avoid bus contention. Use Value: HOLD functionality enables deterministic timing isolation between metrology subsystem and wireless comms stack without software intervention. |
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 speed (20 MHz vs. 3 MHz) but identical memory size and protection features | Select when system SPI peripheral operates above 3 MHz and requires faster configuration loads |
| BR24G32FJ-3GE2 | 32-Kbit I²C EEPROM, 1.7–5.5V, 1 MHz max clock, 5 ms write cycle, TSSOP-8 package | I²C interface (2-wire) instead of SPI; no HOLD or WP pin; different protocol stack requirements | Choose for space-constrained designs where I²C bus already exists and SPI pins are unavailable |
Compared with M95320-WMN6TP and BR24G32FJ-3GE2, AT25320N-10SI-2.7 offers deterministic SPI Mode 0/3 compatibility with HOLD/WP hardware controls ideal for real-time industrial hosts, whereas M95320 trades interface simplicity for speed and BR24G32FJ substitutes protocol flexibility for pin count reduction.
Availability
AT25320N-10SI-2.7 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device manufacturing requiring stable component supply across extended product lifecycles.
Supply support for AT25320N-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 devices, and nonvolatile memory solutions, with a focus on embedded control and connectivity.
AT25320N-10SI-2.7 belongs to Microchip's legacy Atmel SPI EEPROM product line, designed specifically for robust, low-power, byte-addressable nonvolatile storage in harsh industrial and automotive environments.
FAQ
What is the memory organization of the AT25320N-10SI-2.7?
The AT25320N-10SI-2.7 contains 32,768 bits of serial EEPROM memory organized as 4096 words of 8 bits each (4096 × 8). Its address space spans A11–A0, with unused higher address bits ignored per Table 6 in the datasheet. This structure enables direct byte-level access and efficient page writes of up to 32 bytes without external address latching.
Does the AT25320N-10SI-2.7 support both SPI Mode 0 and Mode 3?
Yes, the AT25320N-10SI-2.7 explicitly supports SPI Modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1), as confirmed in the Features section. It samples SI on the rising edge and drives SO on the falling edge in Mode 0, and vice versa in Mode 3 - making it compatible with a broad range of microcontroller SPI peripherals without protocol translation.
How does write protection work on the AT25320N-10SI-2.7?
AT25320N-10SI-2.7 implements dual-layer write protection: hardware-based via the WP pin (when WPEN = 1) and software-based via BP0/BP1 bits in the status register. WP locks status register writes when pulled low; BP0/BP1 define protected memory segments (e.g., 0x0C00–0x0FFF for 1/4-array lock). Both mechanisms can operate independently or concurrently.
What is the typical write cycle time for the AT25320N-10SI-2.7?
The AT25320N-10SI-2.7 has a typical write cycle time of 5 ms, with a maximum of 10 ms under worst-case conditions (per AC Characteristics table). This self-timed internal cycle eliminates host timing dependencies - the device asserts BUSY (RDY = 1) during programming and only accepts new commands after completion, signaled by RDY = 0 via RDSR.
Is the AT25320N-10SI-2.7 qualified for automotive applications?
The base AT25320 family includes automotive-grade variants (e.g., AT25320AN-10SI-2.7), but AT25320N-10SI-2.7 itself is specified for industrial temperature range (−40°C to +85°C) per its ordering information. It is not AEC-Q100 qualified; for automotive use, designers must select the explicitly designated automotive version with appropriate qualification documentation.
AT25320N-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
AT25320N-10SI-2.7 FAQ
1.How can I place an order for AT25320N-10SI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25320N-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 AT25320N-10SI-2.7 reliable?
The price and inventory of AT25320N-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 AT25320N-10SI-2.7 is usually 5 days.
3.What payment methods are accepted for AT25320N-10SI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25320N-10SI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25320N-10SI-2.7?
AT25320N-10SI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25320N-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 AT25320N-10SI-2.7?
For technical support, including AT25320N-10SI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25320N-10SI-2.7 requirements.
6.How does Aetrix verify that AT25320N-10SI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT25320N-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 AT25320N-10SI-2.7 meets industry standards.
7.What is the process for return or replacement of AT25320N-10SI-2.7?
All AT25320N-10SI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT25320N-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 AT25320N-10SI-2.7 part is unused and in its original packaging.
Return procedure for AT25320N-10SI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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