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Renesas AT45DB321E-CCUF-T
- Part No.:
- AT45DB321E-CCUF-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 9-UBGA
- Datasheet:
-
AT45DB321E-CCUF-T.pdf
- Description:
- IC FLASH 32MBIT SPI 85MHZ 9UBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,793
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Product details
Overview
AT45DB321E-CCUF-T from Renesas Electronics is a 32-Mbit serial DataFlash memory with extra 1-Mbit security space, operating from 2.3 V to 3.6 V, supporting SPI modes 0 and 3, up to 85 MHz RapidS™ read speed, and featuring two independent 512/528-byte SRAM buffers for interleaved streaming writes in embedded firmware storage and voice logging applications.
For engineers reviewing the AT45DB321E-CCUF-T datasheet, AT45DB321E-CCUF-T pinout, AT45DB321E-CCUF-T application, or AT45DB321E-CCUF-T equivalent, key selection considerations include its dual-buffer architecture, page-size configurability (512 vs. 528 bytes), hardware/software sector protection, ultra-deep power-down (400 nA), and JEDEC-standard ID read capability.
Technical Context
The AT45DB321E-CCUF-T implements a serial sequential-access Flash architecture with no parallel address bus - data is accessed via SPI command sequences including continuous array read (E8h/0Bh/01h opcodes), buffer-to-main-memory program, and read-modify-write. Its dual SRAM buffers enable concurrent data reception and Flash programming, eliminating write stalls in real-time streaming systems.
It supports three erase granularities - page (512/528 B), block (4 kB), and sector (64 kB) - plus full chip erase (32 Mbits), all self-timed and suspend/resumable. Sector lockdown and 128-byte OTP security register provide tamper-resistant firmware storage, while hardware WP pin and software-controlled protection registers enforce read-only enforcement at sector level.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 32 Mbit main memory + 1 Mbit extra space (8,192 × 512/528-byte pages) |
| Supply voltage | 2.3 V – 3.6 V single supply - enables direct interface with 2.5 V/3.3 V microcontrollers without level shifters |
| Max clock frequency | 85 MHz (RapidS™ mode) - reduces continuous read latency to ≤6 ns tV for high-throughput data retrieval |
| Power-down current | 400 nA typical ultra-deep power-down - extends battery life in always-on sensor nodes and portable recorders |
| Endurance & retention | 100,000 program/erase cycles per page; 20-year data retention - suitable for field-upgradable firmware storage |
| Page size | User-configurable 512 or 528 bytes (factory default 528) - balances density vs. ECC overhead in embedded file systems |
| Security features | 128-byte OTP security register (64-byte factory UID + 64-byte user-programmable); sector lockdown capability |
Pinout & Package
AT45DB321E-CCUF-T uses an 8-pad Ultra-thin DFN package (5 mm × 6 mm × 0.6 mm) with exposed pad (non-connected). Pin functions are optimized for minimal PCB footprint and noise immunity in space-constrained industrial and portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition low-to-high only after command completion to avoid aborting self-timed erase/program operations |
| SCK | Serial Clock | Input clock; rising edge latches SI data, falling edge clocks SO data - strict timing compliance required for >15 MHz operation |
| SI | Serial Input | Command/address/data input; ignored when CS is high - supports daisy-chaining with shared SCK/SO lines |
| SO | Serial Output | Data output; high-impedance when CS is high - enables multi-device SPI buses without external tri-state logic |
| WP | Write Protect | Hardware sector lock control; low = protection enabled - provides fail-safe firmware write blocking independent of software state |
| RESET | Reset Input | Active-low hardware reset; initiates internal state machine recovery without power cycle - critical for robust boot recovery |
| VCC | Power Supply | 2.3–3.6 V supply; decoupling capacitor required within 5 mm for stable RapidS™ operation above 40 MHz |
| GND | Ground | Reference return path; connected to exposed thermal pad on UDFN - improves thermal dissipation during sustained write cycles |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent SRAM buffers | Enables true interleaved streaming: receive new data into Buffer 1 while programming Buffer 2 contents to Flash - eliminates write bottlenecks in audio/video recorders |
| RapidS™ high-speed read | 85 MHz clock support with 6 ns max clock-to-output delay - delivers >10 MB/s sequential read throughput for firmware XIP or image decompression |
| Configurable page size | Factory-set 528-byte or user-selectable 512-byte pages - allows alignment with standard NAND/NOR page layouts or ECC block boundaries |
| Program/erase suspend/resume | Allows interrupting long erase cycles (e.g., 64 kB sector erase) to service time-critical reads - essential for real-time OS coexistence |
| Hardware + software sector protection | Combines WP pin assertion with programmable sector lock-down register - prevents accidental or malicious firmware overwrite in certified medical/industrial devices |
| Ultra-deep power-down mode | 400 nA typical current draw - enables multi-year battery operation in IoT endpoint loggers with infrequent wake-up intervals |
Applications
| Firmware Storage | Voice/Data Logging |
|---|---|
Use Scenario: Storing and updating bootloader and application firmware in resource-constrained MCU-based edge nodes. IC Role / Device Role / Timing Role: Non-volatile code storage with in-system reprogrammability via SPI; supports atomic page updates and rollback via dual-buffer compare-and-swap. Use Value: Eliminates need for external level shifters (2.3–3.6 V compatibility) and enables field firmware patches without hardware redesign. |
Use Scenario: Continuous audio recording in industrial noise monitors or medical voice diaries with limited power budget. IC Role / Device Role / Timing Role: High-throughput sequential write buffer; leverages dual-SRAM interleaving to sustain >1.5 MB/s write rate without dropouts. Use Value: 400 nA ultra-deep power-down extends 10-year coin-cell battery life; sector lockdown protects calibration data from corruption. |
| Secure Boot Key Storage | Industrial HMI Configuration |
Use Scenario: Storing cryptographic keys and device identity in tamper-resistant memory for secure boot chains. IC Role / Device Role / Timing Role: Secure non-volatile storage using 128-byte OTP register with factory-programmed 64-byte UID and user-writable 64-byte zone. Use Value: Hardware-enforced sector lockdown prevents runtime key overwrites; JEDEC ID read enables automated provisioning in manufacturing. |
Use Scenario: Retaining display calibration profiles, language packs, and user preferences across power cycles in panel-mounted HMIs. IC Role / Device Role / Timing Role: Parameter storage with flexible erase granularity - sector erase preserves unrelated configuration while updating display gamma tables. Use Value: Page-erase (512 B) enables fine-grained updates without full reflash; low 25 μA standby current minimizes system quiescent draw. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT45DB321D-CNU-T | Same 32-Mbit capacity but older revision; lacks RapidS™ 85 MHz mode and ultra-deep power-down (400 nA) | Lower-cost option where <40 MHz read speed and >1 μA deep power-down are acceptable | Select only if legacy design reuse or cost sensitivity outweighs performance and power advantages of AT45DB321E-CCUF-T |
| W25Q32JVSNIQ | 32-Mbit Quad SPI NOR Flash; supports QPI/DTR modes, faster random read, but no dual SRAM buffers or RapidS™ sequential streaming | Better for XIP code execution; unsuitable for continuous streaming write workloads requiring buffer interleaving | Choose for MCU code storage with execute-in-place; avoid when continuous audio/video logging or firmware patching with atomicity is required |
Compared with AT45DB321D-CNU-T, the AT45DB321E-CCUF-T delivers 2× higher sequential read bandwidth and 2500× lower deep-power current; versus W25Q32JVSNIQ, it provides unique dual-buffer streaming write capability but lacks quad I/O and random-access optimization.
Availability
AT45DB321E-CCUF-T is available at Aetrix Electronics and suitable for firmware storage, voice/data logging, secure boot key retention, and industrial HMI configuration requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT45DB321E-CCUF-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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, with strong IP in Flash memory, MCUs, and analog power management.
The AT45DB321E-CCUF-T belongs to Renesas' DataFlash® family, designed specifically for high-reliability, low-pin-count sequential data storage in space- and power-constrained embedded systems where traditional parallel NOR/NAND Flash is impractical.
FAQ
What is the maximum supported SPI clock frequency for AT45DB321E-CCUF-T?
The AT45DB321E-CCUF-T supports up to 85 MHz in RapidS™ mode (opcodes 0Bh/1Bh), enabling high-throughput sequential reads. Standard SPI modes 0 and 3 operate up to 66 MHz. The 6 ns max clock-to-output time (tV) ensures timing margin at these speeds. Always verify signal integrity and use proper PCB layout practices for reliable 85 MHz operation.
Does AT45DB321E-CCUF-T support true in-system programming without high voltage?
Yes. The AT45DB321E-CCUF-T performs all program and erase operations from its standard 2.3–3.6 V supply - no external VPP or charge pump required. This simplifies system design and enables safe firmware updates directly from an MCU's GPIO-controlled SPI interface without additional power circuitry.
How does the dual-buffer architecture of AT45DB321E-CCUF-T improve write performance?
The AT45DB321E-CCUF-T contains two independent 512/528-byte SRAM buffers. While one buffer is being written to Flash (a self-timed operation taking ~8 ms for page program), the other can simultaneously accept new data via SPI - enabling uninterrupted streaming writes in audio loggers or telemetry recorders without data loss or CPU polling overhead.
Can AT45DB321E-CCUF-T be used for secure firmware storage with tamper resistance?
Yes. The AT45DB321E-CCUF-T includes hardware WP pin control, software-configurable sector protection registers, permanent sector lockdown capability, and a 128-byte OTP security register (64-byte factory UID + 64-byte user area). These features collectively prevent unauthorized firmware modification and support secure boot key storage in certified industrial and medical devices.
What package type is used by AT45DB321E-CCUF-T, and is the exposed pad electrically connected?
AT45DB321E-CCUF-T uses an 8-pad Ultra-thin DFN package (5 mm × 6 mm × 0.6 mm) with exposed thermal pad. Per the official datasheet, this metal pad is not internally connected to any voltage potential - it may be left floating or tied to GND for improved thermal performance, but must never be connected to VCC or other signals.
AT45DB321E-CCUF-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 9-UBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 32Mbit
- Memory Organization:
- 528 Bytes x 8192 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 85 MHz
- Write Cycle Time - Word, Page:
- 8µs, 4ms
- Access Time:
- -
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-UBGA (6x6)
AT45DB321E-CCUF-T FAQ
1.How can I place an order for AT45DB321E-CCUF-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB321E-CCUF-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 AT45DB321E-CCUF-T reliable?
The price and inventory of AT45DB321E-CCUF-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB321E-CCUF-T is usually 5 days.
3.What payment methods are accepted for AT45DB321E-CCUF-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB321E-CCUF-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB321E-CCUF-T?
AT45DB321E-CCUF-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB321E-CCUF-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 AT45DB321E-CCUF-T?
For technical support, including AT45DB321E-CCUF-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB321E-CCUF-T requirements.
6.How does Aetrix verify that AT45DB321E-CCUF-T is sourced from the original manufacturer or authorized distributors?
All AT45DB321E-CCUF-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 AT45DB321E-CCUF-T meets industry standards.
7.What is the process for return or replacement of AT45DB321E-CCUF-T?
All AT45DB321E-CCUF-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB321E-CCUF-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 AT45DB321E-CCUF-T part is unused and in its original packaging.
Return procedure for AT45DB321E-CCUF-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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