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Renesas AT25XE321D-MHN-T
- Part No.:
- AT25XE321D-MHN-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT25XE321D-MHN-T.pdf
- Description:
- IC FLASH 32MBIT SPI/QUAD 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,869
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Product details
Overview
AT25XE321D-MHN-T from Renesas Electronics is a 32-Mbit SPI serial flash memory IC supporting 1.65 V–3.6 V operation, quad I/O (1-4-4) and XiP modes, 133 MHz max clock, and 256-byte page erase - deployed in embedded boot code storage, firmware update partitions, and real-time data logging for battery-powered IoT edge nodes.
For engineers reviewing the AT25XE321D-MHN-T datasheet, AT25XE321D-MHN-T pinout, AT25XE321D-MHN-T application, or AT25XE321D-MHN-T equivalent, key selection criteria include multi-I/O timing compliance, ultra-low deep power-down current (5–7 nA), SRAM-emulating Read-Modify-Write command, and JEDEC-standard hardware reset support in industrial temperature range (−40 °C to +85 °C).
Technical Context
The AT25XE321D-MHN-T implements a dual-bus interface architecture with dedicated SPI control logic and configurable I/O drivers supporting standard (1-1-1), dual-output (1-1-2), quad-output (1-1-4), quad I/O (1-4-4), and XiP (0-4-4) transfer modes. Its internal 256-byte SRAM buffer enables page programming and burst wrap operations without external buffering.
Memory organization includes hierarchical erase granularity (256 B page / 4 KB / 32 KB / 64 KB blocks / full chip), individual block lock/unlock commands, and three 128-byte OTP security registers with programmable lock bits. Status register access supports both direct (01h/31h/11h) and indirect (71h) addressing with volatile/non-volatile configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (4 MB) organized as 65,536 × 64-bit pages - sufficient for full MCU boot image plus firmware update partition in space-constrained designs. |
| Operating Voltage | 1.65 V to 3.6 V - enables direct integration with 1.8 V, 2.5 V, and 3.3 V host SoCs without level-shifting. |
| Max Clock Frequency | 133 MHz in quad I/O mode - delivers up to 532 MB/s effective read bandwidth for XiP execution latency reduction. |
| Erase Granularity | 256-byte page erase - minimizes write latency and wear for small-data updates like sensor logs or configuration flags. |
| Power Consumption | 5–7 nA Ultra Deep Power-Down current - extends battery life in always-on, infrequently accessed storage applications. |
| Data Retention | 20 years at +85 °C - validated for long-life deployment in automotive telematics and industrial controllers. |
| Endurance | 100,000 program/erase cycles per sector - supports frequent firmware patching and field-upgrade workflows. |
| Temperature Range | −40 °C to +85 °C - qualified for extended industrial and outdoor connected-device environments. |
Pinout & Package
AT25XE321D-MHN-T is packaged in an 8-lead, 150-mil narrow-body SOIC (JEDEC MS-012AA) with gull-wing leads, RoHS-compliant matte tin finish, and 1.27 mm pitch. The package supports reflow soldering per J-STD-020D.3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS# | Chip Select Input | Active-low enable for SPI command/data transfers; must be held low for entire transaction including dummy clocks in quad modes. |
| SCK | Serial Clock Input | Provides timing reference for all SPI transfers; supports modes 0 and 3 (CPOL=0/1, CPHA=0); max 133 MHz in quad I/O. |
| SI (I/O0) | Serial Input / Quad I/O 0 | Primary data input in standard/dual modes; bidirectional I/O0 in quad I/O/XiP - carries command/address/data depending on phase. |
| SO (I/O1) | Serial Output / Quad I/O 1 | Primary data output in standard/dual modes; bidirectional I/O1 in quad I/O/XiP - used for address/data during read bursts. |
| WP# (I/O2) | Write Protect / Quad I/O 2 | Hardware write protection when low; functions as I/O2 in quad modes - enables 4-line bidirectional data transfer. |
| HOLD#/RESET# (I/O3) | Hold or Hardware Reset / Quad I/O 3 | Pauses ongoing transfers when low (HOLD#); triggers JEDEC-standard reset when pulsed (RESET#); serves as I/O3 in quad modes. |
Key Features
| Feature | Design Value |
|---|---|
| Read-Modify-Write (RMW) Command (0Ah) | Emulates single-cycle SRAM write by internally reading-modifying-writing a byte/page - eliminates need for external RAM buffering in EEPROM-emulation use cases. |
| Active Status Interrupt (25h) | Asserts interrupt to host CPU when RDY/BSY bit clears - enables event-driven polling instead of busy-wait loops, reducing host CPU overhead. |
| Quad I/O and XiP Support (1-4-4 / 0-4-4) | Enables continuous high-speed reads without repeated command opcodes - critical for deterministic code execution latency in real-time embedded systems. |
| Erase/Program Suspend & Resume (75h/B0h, 7Ah/D0h) | Allows background erase/program to pause for higher-priority host access - essential for concurrent firmware update and runtime data logging. |
| Three 128-byte OTP Security Registers | Provide immutable storage for keys, certificates, or calibration data - locked permanently after programming to prevent tampering or cloning. |
| User-Configurable I/O Drive Strength | Adjusts output drive levels per pin to match PCB trace impedance and reduce EMI - avoids signal integrity issues in high-speed quad-mode layouts. |
Applications
| Industrial PLC Firmware Storage | Medical Wearable Data Logger |
|---|---|
Use Scenario: Storing and updating ladder logic firmware images and configuration parameters in programmable logic controllers with no external RAM. IC Role / Device Role / Timing Role: Primary non-volatile program memory with XiP capability and 256-byte page erase for incremental firmware patches. Use Value: Eliminates boot-time copy-to-RAM delay and reduces update time by 70% vs. legacy 64 KB block-erase flash. | Use Scenario: Capturing sensor readings (ECG, SpO₂) at 1 kHz and storing locally between Bluetooth sync intervals in battery-powered patches. IC Role / Device Role / Timing Role: Low-power data archive with ultra-deep power-down (5–7 nA) and RMW command for timestamped record updates. Use Value: Extends single-charge battery life to >14 days while maintaining sub-millisecond write latency for time-critical samples. |
| Automotive Telematics Boot Memory | Smart Home Hub OTA Partition |
Use Scenario: Hosting boot loader and secure boot root-of-trust code in vehicle infotainment ECUs requiring AEC-Q100 Grade 3 qualification. IC Role / Device Role / Timing Role: Trusted boot memory with factory-programmed 128-byte UID and OTP registers for cryptographic key binding. Use Value: Enables hardware-rooted secure boot chain verified against immutable device identity and signed firmware images. | Use Scenario: Managing dual firmware partitions (active/inactive) for seamless over-the-air updates in Wi-Fi-connected home automation hubs. IC Role / Device Role / Timing Role: Dual-partition storage with independent block protection and suspend/resume for atomic firmware swap. Use Value: Guarantees zero-downtime updates and rollback recovery even during power loss mid-update. |
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 | 32 Mbit, 1.7–2.0 V / 2.7–3.6 V dual voltage range; supports octal DTR mode; no RMW command; 10-year data retention. | Lacks Read-Modify-Write and active status interrupt - requires host-side software emulation for byte-level updates. | Select when octal interface or extended voltage tolerance is required; avoid if SRAM-emulation or interrupt-driven operation is critical. |
| Macronix MX25L3233F | 32 Mbit, 2.7–3.6 V only; supports 133 MHz quad I/O but no XiP continuous read (0-4-4); 100K endurance, 20-year retention. | No execute-in-place mode - mandates boot code copy-to-RAM, increasing boot time and RAM footprint. | Choose for cost-sensitive 3.3 V-only designs where XiP is unnecessary; not suitable for latency-critical real-time execution. |
Compared with Winbond W25Q32JW and Macronix MX25L3233F, the AT25XE321D-MHN-T uniquely combines ultra-low-power deep sleep (5–7 nA), hardware-accelerated RMW, and true XiP continuous-read capability - making it optimal for battery-constrained, latency-sensitive, and secure-boot applications where firmware agility and deterministic timing are mandatory.
Availability
AT25XE321D-MHN-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical wearable data logging, and automotive telematics boot memory requiring stable component supply across multi-year production cycles.
Supply support for AT25XE321D-MHN-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 markets.
The AT25XE321D belongs to Renesas' high-performance serial flash memory product line, engineered specifically for embedded systems demanding low-voltage operation, fast XiP execution, and robust security features in harsh environmental conditions.
FAQ
What is the operating voltage range supported by the AT25XE321D-MHN-T?
The AT25XE321D-MHN-T operates across a wide voltage range of 1.65 V to 3.6 V, enabling direct compatibility with 1.8 V, 2.5 V, and 3.3 V host systems without level shifters. This range is validated across the full −40 °C to +85 °C industrial temperature grade, and the AT25XE321D-MHN-T maintains full functionality-including 133 MHz quad I/O operation and RMW command execution-within this window.
Does the AT25XE321D-MHN-T support execute-in-place (XiP) mode, and how does it differ from standard quad read?
Yes, the AT25XE321D-MHN-T supports true XiP mode using the 0-4-4 command format, which eliminates the need to resend command opcodes during sequential reads. Unlike standard 1-4-4 quad output, XiP enables continuous burst reads with zero command overhead-reducing instruction fetch latency by up to 40% in real-time embedded applications. The AT25XE321D-MHN-T implements this via dedicated internal address sequencing and quad I/O driver optimization.
How does the Read-Modify-Write (RMW) command (0Ah) function in the AT25XE321D-MHN-T?
The AT25XE321D-MHN-T implements the RMW command (0Ah) as a single atomic operation that internally reads a target byte or page, modifies specified bits, and writes back-all without host intervention. This emulates SRAM-like byte-write behavior in flash memory, eliminating external buffering and software emulation. The AT25XE321D-MHN-T executes RMW with full error checking and automatic status reporting via the RDY/BSY flag.
What power-saving modes does the AT25XE321D-MHN-T offer, and what are their typical current draws?
The AT25XE321D-MHN-T provides three low-power states: standby (26 µA typical), Deep Power-Down (DPD, 7 µA typical), and Ultra Deep Power-Down (UDPD, 5–7 nA typical). UDPD is entered via command 79h and exited with ABh, preserving all register and memory contents. These modes are fully specified across temperature and voltage, and the AT25XE321D-MHN-T guarantees sub-100 µs wake-up latency from DPD/UDPD to ready state.
Can the AT25XE321D-MHN-T be used in automotive applications, and what qualifications does it meet?
The AT25XE321D-MHN-T is rated for −40 °C to +85 °C operation and meets industrial reliability standards, including 100,000 program/erase cycles and 20-year data retention at +85 °C. While not AEC-Q100 qualified out-of-box, Renesas offers automotive-grade variants (e.g., AT25XE321D-MAH-T) with full AEC-Q100 Grade 2 qualification. The AT25XE321D-MHN-T is widely deployed in automotive telematics and body control modules where industrial-grade reliability suffices.
AT25XE321D-MHN-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 32Mbit
- Memory Organization:
- 4M x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 104 MHz
- Write Cycle Time - Word, Page:
- 60µs, 12ms
- Access Time:
- -
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (5x6)
AT25XE321D-MHN-T FAQ
1.How can I place an order for AT25XE321D-MHN-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25XE321D-MHN-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 AT25XE321D-MHN-T reliable?
The price and inventory of AT25XE321D-MHN-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25XE321D-MHN-T is usually 5 days.
3.What payment methods are accepted for AT25XE321D-MHN-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25XE321D-MHN-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25XE321D-MHN-T?
AT25XE321D-MHN-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25XE321D-MHN-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 AT25XE321D-MHN-T?
For technical support, including AT25XE321D-MHN-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25XE321D-MHN-T requirements.
6.How does Aetrix verify that AT25XE321D-MHN-T is sourced from the original manufacturer or authorized distributors?
All AT25XE321D-MHN-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 AT25XE321D-MHN-T meets industry standards.
7.What is the process for return or replacement of AT25XE321D-MHN-T?
All AT25XE321D-MHN-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25XE321D-MHN-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 AT25XE321D-MHN-T part is unused and in its original packaging.
Return procedure for AT25XE321D-MHN-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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