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Microchip Technology 25LC320AT-I/MNY16KVAO
- Part No.:
- 25LC320AT-I/MNY16KVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
25LC320AT-I/MNY16KVAO.pdf
- Description:
- IC EEPROM 32KBIT SPI 10MHZ 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,229
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Product details
Overview
25LC320AT-I/MNY16KVAO from Microchip Technology Inc. is a 32-Kbit SPI Serial EEPROM with 4096 × 8-bit organization, 32-byte page size, and automotive-grade AEC-Q100 qualification for -40°C to +125°C operation. It supports up to 10 MHz clock frequency at 4.5–5.5 V, features hardware write protection via WP pin and STATUS register, and delivers >1 million erase/write cycles with >200-year data retention - deployed in engine control units and ADAS sensor modules.
For engineers reviewing the 25LC320AT-I/MNY16KVAO datasheet, 25LC320AT-I/MNY16KVAO pinout, 25LC320AT-I/MNY16KVAO application, or 25LC320AT-I/MNY16KVAO equivalent, key selection criteria include VCC range (2.5–5.5 V), HOLD/CS timing compliance, block protection granularity (none/¼/½/all), and TDFN-8 package compatibility with IPC-7351B land patterns.
Technical Context
The 25LC320AT-I/MNY16KVAO implements a standard SPI Mode 0,0 interface with separate SI/SO lines, CS-controlled device selection, and HOLD-driven pause/resume capability without sequence reset. Its internal architecture includes an 8-bit instruction register, page latches, HV generator, and EEPROM array with automatic address incrementing during sequential reads.
Write operations require explicit WREN instruction followed by CS high-to-low transition to initiate self-timed internal write cycle (≤5 ms); read operations support continuous addressing with wraparound at 0FFFh. STATUS register bits (WIP, WEL, BP0/BP1, WPEN) enable real-time monitoring and configurable hardware/software write protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32 Kbit (4096 × 8-bit) - supports firmware parameter storage and calibration data logging in resource-constrained ECUs. |
| Interface | SPI-compatible serial bus (Mode 0,0) - interoperable with PIC® and ARM-based microcontrollers without protocol translation. |
| Page Size | 32 bytes - limits maximum atomic write burst; requires software boundary checking to prevent intra-page wraparound corruption. |
| Max Clock Frequency | 10 MHz at VCC ≥ 4.5 V - enables ≤1.04 µs per bit transfer, supporting real-time configuration updates in telematics gateways. |
| Write Endurance | >1 million erase/write cycles - qualifies for 10+ years of daily reprogramming in industrial HMI event logging. |
| Data Retention | >200 years at +25°C - ensures calibration constants remain valid across full vehicle lifecycle without refresh. |
| Operating Temp | -40°C to +125°C (AEC-Q100 Grade 1) - validated for under-hood deployment in powertrain and chassis control modules. |
| Supply Voltage | 2.5 V to 5.5 V - compatible with 3.3 V logic domains and legacy 5 V automotive buses without level shifting. |
Pinout & Package
25LC320AT-I/MNY16KVAO uses an 8-lead TDFN (Thin Dual Flat No-lead) package with 2 mm × 3 mm body, 0.5 mm pitch, and exposed thermal pad (optional VSS connection). Pin numbering follows standard TDFN orientation with pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select Input | Active-low enable; forces SO into high-impedance when high, enabling multi-device SPI bus sharing. |
| 2 (SO) | Serial Data Output | Tri-state output updated after SCK falling edge; requires external pull-up for open-drain compatibility. |
| 3 (WP) | Write-Protect Pin | Hardware lock for STATUS register nonvolatile bits when WPEN = 1; grounded to disable writes during field updates. |
| 4 (VSS) | Ground | Reference return path for all I/O and core logic; must be low-impedance connection to minimize noise coupling. |
| 5 (SI) | Serial Data Input | Latches data/instructions on SCK rising edge; tolerant of 0.2 VCC–0.3 VCC low-level inputs at 1.8 V operation. |
| 6 (SCK) | Serial Clock Input | Synchronizes all transfers; max 2 µs rise/fall time spec ensures timing margin for PCB trace lengths ≤10 cm. |
| 7 (HOLD) | Hold Input | Pauses active SPI transaction without resetting state; must transition while SCK is low to avoid metastability. |
| 8 (VCC) | Supply Voltage | Power rail with 5 µA standby current at 5.5 V; decoupling capacitor (100 nF) required within 5 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed write cycle | ≤5 ms internal erase/write completion - eliminates need for host-side delay loops or polling overhead. |
| Block write protection | Selectable 0%, 25%, 50%, or 100% array protection via BP0/BP1 bits - prevents accidental overwrites of boot code or safety-critical parameters. |
| Power-on write disable | Write enable latch resets at power-up - guarantees no spurious writes during brown-out or cold-start conditions. |
| HOLD pin functionality | Real-time SPI transaction suspension with immediate SO tri-state - enables servicing of higher-priority CAN interrupts without data loss. |
| AEC-Q100 qualification | Grade 1 (-40°C to +125°C) stress testing - validates reliability for automotive powertrain, braking, and ADAS applications. |
| ESD robustness | 4 kV HBM protection on all pins - reduces risk of field failure due to handling or system-level ESD events. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing adaptive fuel trim tables and misfire counters that update dynamically during vehicle operation. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to MCU's SPI peripheral with HOLD used during CAN message arbitration. Use Value: Enables real-time calibration persistence across ignition cycles without requiring backup battery or supercapacitor. | Use Scenario: Logging radar sensor calibration offsets and camera lens distortion coefficients during factory setup and field recalibration. IC Role / Device Role / Timing Role: Secure parameter storage with hardware write-protection (WP pin tied low) preventing unauthorized modification of safety-critical values. Use Value: Meets ISO 26262 ASIL-B requirements for data integrity via dual-layer protection (STATUS register + physical pin). |
| Telematics Control Unit (TCU) | Electric Vehicle Battery Management System (BMS) |
Use Scenario: Maintaining OTA update staging metadata, firmware version history, and secure boot keys across cellular network interruptions. IC Role / Device Role / Timing Role: High-reliability SPI EEPROM accessed during boot sequence and background task execution; CS toggled per command frame. Use Value: >1M endurance supports 10+ years of daily OTA updates; 200-year retention ensures key validity beyond vehicle service life. | Use Scenario: Recording cell voltage imbalance thresholds and thermal derating curves used by BMS firmware to extend pack lifetime. IC Role / Device Role / Timing Role: Low-power nonvolatile memory operating from 3.3 V supply; standby current <1 µA at +85°C minimizes parasitic drain. Use Value: Eliminates need for separate RTC backup power domain while maintaining accuracy over 15-year pack warranty period. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 25AA320AT-I/MNY | Wider VCC range (1.8–5.5 V); supports 3 MHz operation down to 1.8 V; identical pinout and instruction set. | Better suited for mixed-voltage systems with 1.8 V logic domains; not AEC-Q100 qualified. | Select when operating below 2.5 V or when automotive qualification is unnecessary. |
| AT25DF321A-SHN-T | 32 Mbit density; quad SPI interface; 8-pin SOIC only; no HOLD pin; different command set and status register layout. | Higher throughput for firmware image storage; lacks HOLD and hardware write-protect pin; requires driver rewrite. | Select only when migrating to larger memory capacity and accepting software redesign effort. |
Compared with 25AA320AT-I/MNY and AT25DF321A-SHN-T, the 25LC320AT-I/MNY16KVAO uniquely balances AEC-Q100 compliance, HOLD functionality, and 2.5–5.5 V operation - making it optimal for cost-sensitive, safety-aware automotive modules where deterministic interrupt response and pin-level write security are mandatory.
Availability
25LC320AT-I/MNY16KVAO is available at Aetrix Electronics and suitable for engine control units, ADAS sensor modules, telematics gateways, and battery management systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 25LC320AT-I/MNY16KVAO 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 Inc. is a leading provider of microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 25LC320A family delivers automotive-qualified serial EEPROMs optimized for functional safety-critical applications requiring guaranteed data integrity, deterministic timing, and robust ESD immunity in harsh environments.
FAQ
What is the maximum clock frequency supported by the 25LC320AT-I/MNY16KVAO?
The 25LC320AT-I/MNY16KVAO supports up to 10 MHz clock frequency when VCC is between 4.5 V and 5.5 V. At lower supply voltages (2.5–4.5 V), the maximum clock rate drops to 5 MHz, and at 1.8–2.5 V it is limited to 3 MHz - though the 25LC320AT-I/MNY16KVAO is specified only for 2.5–5.5 V operation per its datasheet.
Does the 25LC320AT-I/MNY16KVAO support hardware write protection?
Yes, the 25LC320AT-I/MNY16KVAO supports hardware write protection through the combination of the WP pin and the WPEN bit in the STATUS register. When WP is low and WPEN is set, writes to nonvolatile STATUS bits are disabled. The 25LC320AT-I/MNY16KVAO also supports software-configurable block protection (BP0/BP1) for memory array segments.
What package type is used by the 25LC320AT-I/MNY16KVAO?
The 25LC320AT-I/MNY16KVAO uses an 8-lead TDFN (Thin Dual Flat No-lead) package with 2 mm × 3 mm body, 0.5 mm pitch, and an exposed thermal pad. This package is marked "MNY" in Microchip's device selection table and is RoHS-compliant and AEC-Q100 qualified.
How does the HOLD pin function in the 25LC320AT-I/MNY16KVAO?
The HOLD pin in the 25LC320AT-I/MNY16KVAO suspends ongoing SPI communication without resetting the internal state. When pulled low while SCK is low, it places SO in high-impedance and ignores SI/SCK transitions until HOLD is returned high. This allows the host MCU to service urgent interrupts and resume exactly where the transaction left off - a critical feature in time-sensitive automotive systems using the 25LC320AT-I/MNY16KVAO.
Is the 25LC320AT-I/MNY16KVAO qualified for automotive applications?
Yes, the 25LC320AT-I/MNY16KVAO is AEC-Q100 qualified for Grade 1 operation (-40°C to +125°C) and is explicitly listed in the device selection table as supporting Extended (E) temperature range. Its qualification covers stress testing for thermal cycling, humidity, and ESD - confirming suitability for under-hood and chassis-mounted automotive modules using the 25LC320AT-I/MNY16KVAO.
25LC320AT-I/MNY16KVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 10 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
25LC320AT-I/MNY16KVAO FAQ
1.How can I place an order for 25LC320AT-I/MNY16KVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for 25LC320AT-I/MNY16KVAO 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 25LC320AT-I/MNY16KVAO reliable?
The price and inventory of 25LC320AT-I/MNY16KVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25LC320AT-I/MNY16KVAO is usually 5 days.
3.What payment methods are accepted for 25LC320AT-I/MNY16KVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25LC320AT-I/MNY16KVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25LC320AT-I/MNY16KVAO?
25LC320AT-I/MNY16KVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25LC320AT-I/MNY16KVAO 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 25LC320AT-I/MNY16KVAO?
For technical support, including 25LC320AT-I/MNY16KVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25LC320AT-I/MNY16KVAO requirements.
6.How does Aetrix verify that 25LC320AT-I/MNY16KVAO is sourced from the original manufacturer or authorized distributors?
All 25LC320AT-I/MNY16KVAO 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 25LC320AT-I/MNY16KVAO meets industry standards.
7.What is the process for return or replacement of 25LC320AT-I/MNY16KVAO?
All 25LC320AT-I/MNY16KVAO units undergo pre-shipment inspection (PSI). If there is an issue with 25LC320AT-I/MNY16KVAO, 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 25LC320AT-I/MNY16KVAO part is unused and in its original packaging.
Return procedure for 25LC320AT-I/MNY16KVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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