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Renesas AT25XE321D-SHN-T
- Part No.:
- AT25XE321D-SHN-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25XE321D-SHN-T.pdf
- Description:
- IC FLASH 32MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,925
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Product details
Overview
AT25XE321D-SHN-T from Renesas Electronics is a 32-Mbit SPI serial flash memory IC supporting 1.65 V–3.6 V operation, 133 MHz max clock frequency, and multi-I/O modes (1-1-2, 1-1-4, 1-4-4, 0-4-4) for high-speed code execution and data storage in battery-powered embedded systems.
For engineers reviewing the AT25XE321D-SHN-T datasheet, AT25XE321D-SHN-T pinout, AT25XE321D-SHN-T application, or AT25XE321D-SHN-T equivalent, key selection criteria include XiP capability, ultra-low-power deep power-down (5–7 nA), flexible erase granularity (256-byte page to 64-kByte block), and JEDEC-standard hardware reset support.
Technical Context
The AT25XE321D-SHN-T implements a dual-quad I/O interface with configurable command/address/data lane widths, enabling both standard SPI and high-throughput XiP operation. Its internal architecture integrates a 256-byte SRAM buffer, status register bank (SR1–SR6), and OTP security registers for firmware integrity.
It supports nested program/erase suspend-resume operations, active status interrupt signaling via RDY/BSY flag clearing, and Read-Modify-Write (RMW) emulation of SRAM writes - all managed through discrete SPI commands including 0Ah (RMW), 25h (interrupt enable), and 75h/B0h (suspend).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (4 MB) organized as 65,536 × 64-bit pages; enables compact firmware storage without external expansion. |
| Operating Voltage | 1.65 V to 3.6 V - supports direct integration into single-cell Li-ion, coin-cell, and wide-input industrial rails. |
| Max Clock Frequency | 133 MHz in quad I/O mode - delivers up to 532 MB/s effective read bandwidth for real-time XiP applications. |
| Erase Granularity | 256-byte page, 4/32/64-kByte blocks, full chip - allows fine-grained data logging and firmware patching without bulk erasure. |
| Power Consumption | 5–7 nA Ultra Deep Power-Down current - extends battery life in always-on sensor nodes and wearables. |
| Data Retention & Endurance | 20 years retention, 100,000 program/erase cycles - meets long-life requirements for industrial control and automotive telematics. |
| Temperature Range | −40 °C to +85 °C - qualified for extended industrial and automotive cabin environments. |
Pinout & Package
AT25XE321D-SHN-T is supplied in an 8-lead SOIC (208-mil) package per JEDEC MS-012, with gull-wing leads and RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS# | Chip Select | Active-low enable for SPI command initiation; supports daisy-chaining and multi-device bus arbitration. |
| SCK | Serial Clock | Input clock synchronized to host controller; determines maximum transfer rate across all I/O modes. |
| SI (I/O0) | Serial Input / Quad I/O Lane 0 | Primary data input in standard SPI; becomes bidirectional lane 0 in quad I/O/XiP modes. |
| SO (I/O1) | Serial Output / Quad I/O Lane 1 | Primary data output in standard SPI; becomes bidirectional lane 1 in quad I/O/XiP modes. |
| WP# (I/O2) | Write Protect / Quad I/O Lane 2 | Hardware write protection when asserted low; functions as I/O2 in quad modes for address/data expansion. |
| HOLD#/RESET | Hold or Hardware Reset | Pauses ongoing transfers (HOLD#) or forces device reset (RESET) - dual-function pin reduces board footprint. |
Key Features
| Feature | Design Value |
|---|---|
| Execute-in-Place (XiP) Support | Enables direct CPU instruction fetch from flash using 0-4-4 continuous read mode - eliminates boot RAM copy overhead. |
| Read-Modify-Write (RMW) Command | Single 0Ah command emulates byte-level SRAM writes - simplifies EEPROM-like data updates without software-managed erase. |
| Active Status Interrupt | Automatically asserts interrupt on host GPIO when RDY/BSY bit clears - removes polling latency in real-time systems. |
| Triple OTP Security Registers | 3 × 128-byte one-time programmable areas for secure key storage, device identity, or firmware signature binding. |
| Flexible Memory Protection | Individual block lock, start/end user-definable protected zones, and global lock/unlock - enforces firmware partitioning and field update safety. |
Applications
| Firmware Storage for Microcontrollers | IoT Edge Node Data Logging |
|---|---|
Use Scenario: Storing bootloader, application firmware, and configuration parameters for ARM Cortex-M or RISC-V MCUs. IC Role / Device Role / Timing Role: Non-volatile program memory accessed via SPI during boot and runtime XiP. Use Value: Enables fast startup with 133 MHz quad reads and eliminates external RAM dependency for code execution. |
Use Scenario: Capturing sensor readings, event timestamps, and diagnostic logs in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Local persistent storage with 256-byte page erase for efficient small-data updates. Use Value: Achieves >10-year field life using 5 nA UDPD current and 100K-cycle endurance under frequent write cycles. |
| Industrial HMI Display Boot Memory | Automotive Telematics Firmware Vault |
Use Scenario: Hosting GUI assets, font tables, and firmware images for touch-enabled human-machine interfaces. IC Role / Device Role / Timing Role: High-bandwidth SPI flash delivering pixel data and executable code to display controllers. Use Value: Sustains 532 MB/s read throughput in 0-4-4 XiP mode to prevent UI frame stutter during dynamic content loading. |
Use Scenario: Securing OTA update packages, cryptographic keys, and vehicle calibration data in connected ECUs. IC Role / Device Role / Timing Role: Trusted non-volatile storage with OTP registers and individual block locking for firmware integrity. Use Value: Prevents unauthorized firmware modification using hardware-enforced write protection and JEDEC ID authentication. |
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 min, 133 MHz, no RMW command, no active status interrupt, 100K cycles, same SOIC-8 package. | Lacks hardware interrupt signaling and true SRAM-emulation write - requires software-managed erase before each byte update. | Select when cost sensitivity outweighs need for RMW efficiency or interrupt-driven timing control. |
| Micron MT25QL32 | 32 Mbit, 2.7–3.6 V only, 133 MHz, supports SFDP v1.6, includes DTR mode, no UDPD (<1 µA DPD only), same SOIC-8. | Higher voltage floor excludes single-cell Li-ion use; lacks ultra-deep power-down for multi-year battery operation. | Prefer for systems with stable 3.3 V rails and where double-transfer-rate (DTR) timing margin is critical. |
Compared with W25Q32JW and MT25QL32, AT25XE321D-SHN-T uniquely combines ultra-low-power UDPD, hardware-interrupt-ready status signaling, and single-command RMW - making it optimal for energy-constrained, real-time, and secure firmware storage applications.
Availability
AT25XE321D-SHN-T is available at Aetrix Electronics and suitable for industrial HMI, IoT edge node, and automotive telematics applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AT25XE321D-SHN-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 specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and infrastructure markets.
The AT25XE321D belongs to Renesas' AT25XE family of high-reliability serial flash devices engineered for ultra-low-power, secure, and high-performance embedded code and data storage.
FAQ
What is the minimum operating voltage for the AT25XE321D-SHN-T?
The AT25XE321D-SHN-T operates down to 1.65 V, enabling direct compatibility with single-cell lithium-ion (2.5–4.2 V) and coin-cell (2.0–3.0 V) power sources without voltage regulation. This specification is verified across the full −40 °C to +85 °C temperature range and supports reliable boot and XiP operation at the lowest valid rail.
Does the AT25XE321D-SHN-T support Execute-in-Place (XiP) mode?
Yes, the AT25XE321D-SHN-T supports true XiP operation using the 0-4-4 command format, which eliminates opcode transmission after initial setup and enables continuous burst reads at up to 133 MHz. This allows host processors to execute code directly from flash memory without copying to RAM, reducing boot time and memory footprint.
How does the Read-Modify-Write (RMW) function work in the AT25XE321D-SHN-T?
The AT25XE321D-SHN-T implements RMW via the dedicated 0Ah command, which performs atomic read-erase-program of a single byte or word within a page - eliminating separate software-managed erase steps. This feature emulates EEPROM behavior and is confirmed in Section 4.16 and Table 20 of the DS-AT25XE321D-160 datasheet.
What power-saving modes does the AT25XE321D-SHN-T offer?
The AT25XE321D-SHN-T provides three low-power states: Standby (26 µA typical), Deep Power-Down (7 µA typical), and Ultra Deep Power-Down (5–7 nA typical). UDPD mode is entered via 79h command and exited with ABh, enabling multi-year battery life in always-on sensor nodes.
Is the AT25XE321D-SHN-T pin-compatible with other Renesas serial flash devices?
The AT25XE321D-SHN-T uses the industry-standard 8-pin SOIC (208-mil) footprint and shares identical pin functions (CS#, SCK, SI/SO/WP#/HOLD#) with Renesas' AT25XE161D and AT25XE641D. However, firmware-level command set differences and OTP register layout require validation before drop-in replacement.
AT25XE321D-SHN-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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-SOIC
AT25XE321D-SHN-T FAQ
1.How can I place an order for AT25XE321D-SHN-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25XE321D-SHN-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-SHN-T reliable?
The price and inventory of AT25XE321D-SHN-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-SHN-T is usually 5 days.
3.What payment methods are accepted for AT25XE321D-SHN-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25XE321D-SHN-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25XE321D-SHN-T?
AT25XE321D-SHN-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25XE321D-SHN-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-SHN-T?
For technical support, including AT25XE321D-SHN-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25XE321D-SHN-T requirements.
6.How does Aetrix verify that AT25XE321D-SHN-T is sourced from the original manufacturer or authorized distributors?
All AT25XE321D-SHN-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-SHN-T meets industry standards.
7.What is the process for return or replacement of AT25XE321D-SHN-T?
All AT25XE321D-SHN-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25XE321D-SHN-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-SHN-T part is unused and in its original packaging.
Return procedure for AT25XE321D-SHN-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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