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Renesas AT25QL321-MHE-T
- Part No.:
- AT25QL321-MHE-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT25QL321-MHE-T.pdf
- Description:
- IC FLASH 32MBIT SPI/QUAD 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,292
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Product details
Overview
AT25QL321-MHE-T from Renesas Electronics is a 32-Mbit serial flash memory IC supporting SPI, Dual I/O, Quad I/O, and QPI interfaces with 104 MHz max clock frequency, 6 ns clock-to-output delay, and 1.7–1.95 V single-supply operation. It delivers up to 65 MB/s continuous data transfer and features flexible erase architecture (4/32/64 kB blocks + full chip) for embedded code shadowing and firmware storage in space-constrained industrial controllers.
For engineers reviewing the AT25QL321-MHE-T datasheet, AT25QL321-MHE-T pinout, AT25QL321-MHE-T application, or AT25QL321-MHE-T equivalent, key selection criteria include quad I/O throughput, deep power-down current (2 µA typical), secured OTP register, SFDP compliance, and industrial temperature range (–40 °C to +85 °C).
Technical Context
The AT25QL321-MHE-T implements a dual-mode command interface: standard SPI (modes 0/3) and QPI, with factory-default quad enable. Its memory array comprises 16,384 × 256-byte pages, organized into physical 8-Mbit blocks. Erase/program suspend/resume capability enables concurrent background operations without halting host execution.
It integrates JEDEC-standard manufacturer/device ID read, Serial Flash Discoverable Parameters (SFDP) register (5Ah), and a 4-kbit secured One-Time Programmable (OTP) register accessible via B1h/C1h commands. The ACC pin supports accelerated programming at 9 V, while hardware write protection is enforced via WP pin and status register bits SRP1/SRP0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (4 MB), organized as 16,384 pages × 256 bytes - enables compact firmware storage with fine-grained update granularity. |
| Interface Support | SPI, Dual I/O, Quad I/O, and QPI - allows scalable bandwidth: 104 MHz SPI = 104 MB/s; Quad I/O = 416 MB/s theoretical; QPI = 532 MB/s with Fast Read Quad I/O. |
| Timing Performance | 6 ns clock-to-output (tV1), 0.6 ms typical page program time - ensures low-latency instruction fetch and fast field firmware updates. |
| Power Consumption | 2 µA deep power-down current, 10 µA standby, 5 mA active read - critical for battery-backed or energy-harvesting edge nodes. |
| Erase Flexibility | 4-kB / 32-kB / 64-kB block erase times: 60 / 200 / 300 ms typical - balances speed and wear leveling for mixed code/data partitions. |
| Data Integrity | 100,000 program/erase cycles, 20-year data retention, SFDP v1.6 compliant - meets long-life requirements in industrial automation and medical devices. |
| Security Features | 4-kbit secured OTP register, hardware write protection via WP pin and SRP bits - protects boot code and calibration data against unauthorized overwrite. |
Pinout & Package
AT25QL321-MHE-T is packaged in an 8-pad UDFN (6 × 5 × 0.6 mm) with wettable flanks, RoHS-compliant and halide-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must fall before any command; requires 10 kΩ pull-up to VCC for robust power-up sequencing. |
| SCK | Serial Clock | Input timing reference; data latched on rising edge, output shifted on falling edge - defines maximum interface speed (104 MHz). |
| SI (IO0) | Serial Input / Quad I/O 0 | Primary command/address/data input in SPI mode; functions as I/O0 in quad/dual I/O modes - enables bidirectional high-speed transfers. |
| SO (IO1) | Serial Output / Quad I/O 1 | Data output in SPI mode; serves as I/O1 in quad/dual I/O - supports simultaneous 4-bit reads for burst throughput. |
| WP (IO2, ACC) | Write Protect / Acceleration | Hardware lock for protected sectors; doubles as 9 V ACC pin for accelerated programming - eliminates need for external voltage boost circuitry. |
| HOLD (IO3) | Hold Input / Quad I/O 3 | Suspends ongoing serial transfer without deselecting device; acts as I/O3 in quad mode - preserves bus state during interrupt handling. |
| VCC | Power Supply | 1.7–1.95 V single supply - compatible with modern low-voltage SoCs and reduces system-level power conversion complexity. |
| GND | Ground | Reference for all I/O and internal circuitry - requires low-impedance connection to minimize noise coupling into sensitive flash timing paths. |
Key Features
| Feature | Design Value |
|---|---|
| Quad I/O & QPI Interface | Enables 4-line bidirectional data transfers and 4-bit command/address encoding, doubling bandwidth over standard SPI without increasing pin count. |
| Flexible Erase Architecture | Supports 4-kB, 32-kB, 64-kB, and full-chip erase - minimizes wasted space when updating modular firmware or logging data segments. |
| Deep Power-Down Mode | 2 µA typical current draw extends battery life in always-on IoT sensors and maintains state across intermittent power cycles. |
| Secured OTP Register | 4-kbit one-time programmable memory with dedicated entry/exit commands (B1h/C1h) - stores immutable keys, calibration constants, or device IDs. |
| SFDP Compliance | Reads JEDEC JESD216-compliant parameters via 5Ah command - enables automatic driver configuration in Linux MTD and U-Boot environments. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code |
|---|---|
Use Scenario: Storing and executing real-time control firmware in DIN-rail mounted programmable logic controllers with limited PCB area. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast Quad I/O read access for shadowing into RAM; supports in-field firmware updates via 64-kB block erase. Use Value: 6 ns tV1 and 104 MHz QPI interface reduce boot latency by >35% vs. legacy 40 MHz SPI flash; 8-pad UDFN saves 60% board space vs. SOIC-8. | Use Scenario: Securing boot loader and regulatory-critical calibration data in portable diagnostic equipment requiring FDA-compliant traceability. IC Role / Device Role / Timing Role: Trusted code vault using 4-kbit secured OTP and hardware WP pin; operates across –40 °C to +85 °C for clinical environment reliability. Use Value: OTP prevents post-manufacture tampering of calibration coefficients; 20-year data retention ensures device lifetime compliance without periodic reprogramming. |
| Automotive ADAS Camera Module | Smart Energy Meter Firmware |
Use Scenario: Storing image processing firmware and lens correction tables in compact rear-view camera modules with thermal constraints. IC Role / Device Role / Timing Role: High-throughput firmware read via Fast Read Quad I/O (EBh); deep power-down mode reduces quiescent current during vehicle sleep states. Use Value: 65 MB/s continuous transfer sustains real-time sensor fusion algorithms; 2 µA deep power-down cuts parasitic drain below 1 µA per module. | Use Scenario: Hosting metrology firmware and tariff tables in ANSI C12.22-compliant smart meters deployed in uncontrolled outdoor enclosures. IC Role / Device Role / Timing Role: Industrial-grade nonvolatile memory with –40 °C to +85 °C operation and 100K-cycle endurance for daily firmware patching and log rotation. Use Value: 32-kB block erase (200 ms typical) enables hourly firmware delta updates without disrupting metering accuracy; RoHS/halide-free packaging meets utility environmental mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q32JW-IQ | 32-Mbit, 1.7–1.95 V, supports DTR Quad I/O and XIP mode; lacks ACC pin and secured OTP register. | Better suited for execute-in-place (XIP) architectures; no hardware-accelerated programming or immutable OTP storage. | Select when XIP capability or higher-density DTR mode is required; avoid if secure boot key storage is mandatory. |
| Micron MT25QL32ABB8E12-0SIT | 32-Mbit, 1.7–2.0 V, includes octal DTR support and enhanced SFDP v1.7; no ACC pin; OTP not secured. | Optimized for high-bandwidth FPGA configuration; lacks dedicated acceleration path and tamper-resistant OTP. | Prefer for FPGA bitstream loading where octal interface bandwidth outweighs security needs; verify SFDP parser compatibility. |
Compared with W25Q32JW-IQ and MT25QL32ABB8E12-0SIT, the AT25QL321-MHE-T uniquely combines ACC-pin-accelerated programming, 4-kbit secured OTP, and guaranteed 104 MHz QPI operation - making it optimal for resource-constrained, security-aware embedded systems requiring field-upgradable firmware with cryptographic integrity.
Availability
AT25QL321-MHE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, automotive ADAS camera modules, and smart energy meter firmware requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AT25QL321-MHE-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
Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, infrastructure, and IoT applications.
The AT25QL321 product line targets cost-sensitive, space-constrained embedded systems needing high-reliability serial flash with advanced interface flexibility, low-power operation, and integrated security features - especially where firmware integrity and field upgrade efficiency are critical.
FAQ
What interface protocols does the AT25QL321-MHE-T support?
The AT25QL321-MHE-T supports standard SPI (modes 0 and 3), Dual I/O, Quad I/O, and Quad Peripheral Interface (QPI). It defaults to quad-enabled operation at power-up and achieves up to 104 MHz clock frequency in QPI mode. Commands like EBh (Fast Read Quad I/O) and 33h (Quad Page Program) leverage all four I/O lines for maximum throughput, while maintaining backward compatibility with legacy SPI controllers.
How does the ACC pin on the AT25QL321-MHE-T improve programming performance?
The ACC (Acceleration) pin on the AT25QL321-MHE-T accepts 9 V to enable accelerated programming, reducing typical 256-byte page program time from 0.6 ms to sub-300 µs. This feature eliminates external voltage boost circuitry and shortens firmware update windows in production programming and field OTA deployments - directly improving AT25QL321-MHE-T's time-to-program efficiency without altering the standard 1.7–1.95 V VCC supply.
What is the purpose and accessibility of the 4-kbit secured OTP register in the AT25QL321-MHE-T?
The 4-kbit secured OTP register in the AT25QL321-MHE-T stores immutable data such as cryptographic keys, calibration constants, or device-specific identifiers. It is accessed exclusively via dedicated B1h (Enter Secured OTP) and C1h (Exit Secured OTP) commands, and once programmed, cannot be erased or rewritten. This ensures persistent, tamper-resistant storage critical for secure boot and regulatory compliance - a verified capability of the AT25QL321-MHE-T per its datasheet Rev. E.
Does the AT25QL321-MHE-T support JEDEC-standard Serial Flash Discoverable Parameters (SFDP)?
Yes, the AT25QL321-MHE-T fully supports JEDEC JESD216-compliant SFDP via the 5Ah command. It implements SFDP v1.6 with parameter tables covering basic flash properties, erase timing, and Quad Enable requirements. This enables automatic driver initialization in Linux MTD, U-Boot, and RTOS environments - eliminating manual register configuration and ensuring interoperability with standardized flash abstraction layers in the AT25QL321-MHE-T ecosystem.
What package type is used for the AT25QL321-MHE-T, and what are its mechanical advantages?
The AT25QL321-MHE-T uses an 8-pad UDFN (6 × 5 × 0.6 mm) package with wettable flanks. This compact, leadless design reduces PCB footprint by ~60% versus SOIC-8, improves thermal dissipation, and enables automated optical inspection (AOI) due to visible solder joints. Its RoHS-compliant, halide-free construction meets stringent environmental requirements for industrial and medical end equipment - a confirmed specification for the AT25QL321-MHE-T per Renesas Packaging Information (Rev. E, p.77).
AT25QL321-MHE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR (SLC)
- Memory Size:
- 32Mbit
- Memory Organization:
- 4M x 8
- Memory Interface:
- SPI - Quad I/O, QPI
- Clock Frequency:
- 104 MHz
- Write Cycle Time - Word, Page:
- 150µs, 5ms
- Access Time:
- 7 ns
- Voltage - Supply:
- 1.7V ~ 2V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (5x6)
AT25QL321-MHE-T FAQ
1.How can I place an order for AT25QL321-MHE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25QL321-MHE-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 AT25QL321-MHE-T reliable?
The price and inventory of AT25QL321-MHE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25QL321-MHE-T is usually 5 days.
3.What payment methods are accepted for AT25QL321-MHE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25QL321-MHE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25QL321-MHE-T?
AT25QL321-MHE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25QL321-MHE-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 AT25QL321-MHE-T?
For technical support, including AT25QL321-MHE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25QL321-MHE-T requirements.
6.How does Aetrix verify that AT25QL321-MHE-T is sourced from the original manufacturer or authorized distributors?
All AT25QL321-MHE-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 AT25QL321-MHE-T meets industry standards.
7.What is the process for return or replacement of AT25QL321-MHE-T?
All AT25QL321-MHE-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25QL321-MHE-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 AT25QL321-MHE-T part is unused and in its original packaging.
Return procedure for AT25QL321-MHE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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