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Renesas AT25QL641-SHE-T
- Part No.:
- AT25QL641-SHE-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25QL641-SHE-T.pdf
- Description:
- IC FLASH 64MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,965
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Product details
Overview
AT25QL641-SHE-T from Renesas Electronics is a 64-Mbit (8 × 8 Mbit) serial flash memory IC supporting SPI, Dual I/O, Quad I/O, and QPI interfaces with 133 MHz max clock frequency, 6 ns clock-to-output delay, and industrial temperature range (−40 °C to +85 °C). It delivers up to 66 MB/s continuous data transfer and integrates 4-kbit secured OTP for firmware integrity in embedded boot code storage.
For engineers reviewing the AT25QL641-SHE-T datasheet, AT25QL641-SHE-T pinout, AT25QL641-SHE-T application, or AT25QL641-SHE-T equivalent, key selection criteria include quad I/O timing compliance, deep power-down current (2 µA typ), 4-kB/32-kB/64-kB flexible erase granularity, hardware write protection via WP pin, and SFDP register support for automated configuration.
Technical Context
The AT25QL641-SHE-T implements a unified command set across SPI, Dual I/O, Quad I/O, and QPI modes-enabling seamless interface migration without firmware rework. Its memory array comprises 32,768 pages of 256 bytes each, with physical block size fixed at 8 Mbit and erase operations supported at 4-kB, 32-kB, 64-kB, and full-chip levels.
It features dual status registers (SR-1/SR-2) with configurable protection bits (BP2–BP0, TB, SEC, SRP1/SRP0), QE bit factory-enabled for quad mode, and hardware-controlled locking via WP pin. The device supports erase/program suspend/resume and JEDEC-standard manufacturer/device ID read (90h/92h/94h/9Fh).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 64 Mbit (8 × 8 Mbit), organized as 32,768 × 256-byte pages - enables efficient code shadowing and modular firmware updates. |
| Interface Support | SPI Modes 0/3, Dual Output Read, Quad I/O Program/Read, QPI - allows bandwidth scaling from 133 MHz (SPI) to 532 MHz equivalent (Quad I/O). |
| Max Clock Frequency | 133 MHz - achieves 66 MB/s sustained read throughput using Fast Read Quad I/O (EBh) command. |
| Erase Granularity | 4-kB, 32-kB, 64-kB blocks, and full chip - minimizes wasted space during partial firmware updates or data logging. |
| Power Consumption | 2 µA Deep Power-Down (typ), 10 µA Standby (typ), 5 mA Active Read (typ) - extends battery life in always-on IoT edge nodes. |
| Data Retention & Endurance | 20 years retention; 100,000 program/erase cycles per block - qualifies for long-life industrial control firmware storage. |
| Operating Voltage | 1.7 V to 1.95 V single supply - compatible with low-voltage SoC I/O domains and reduces system-level voltage regulation complexity. |
Pinout & Package
AT25QL641-SHE-T is packaged in an 8-pad DFN (6 × 5 × 0.6 mm), RoHS-compliant, green package with wettable flanks per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; places device in standby when high, disables output drivers to prevent bus contention. |
| SO/IO1 | Serial Output / I/O Line 1 | Output during standard SPI reads; bidirectional in Dual/Quad I/O modes - requires pull-up for SPI-only use. |
| WP | Write Protect | Hardware lock for Status Registers; active-low assertion prevents accidental writes to BP/SRP/QE bits. |
| GND | Ground | Reference return path for all digital and analog circuitry; must be low-impedance for stable tV1 timing. |
| VCC | Power Supply | 1.7–1.95 V core supply; decoupling capacitor required within 10 mm to meet AC timing specs. |
| HOLD | Hold Input | Pauses ongoing serial transfer without deselecting device - preserves transaction state during host interrupt handling. |
| SI/IO0 | Serial Input / I/O Line 0 | Input during page program; bidirectional in Dual/Quad I/O - carries address/data in QPI mode. |
| SCK | Serial Clock | Edge-triggered master clock; 133 MHz max rate defines minimum tV1 (6 ns) and setup/hold margins. |
Key Features
| Feature | Design Value |
|---|---|
| Quad Enable (QE) factory-default enabled | Eliminates need for post-power-up QE bit programming before Quad I/O operation - reduces boot initialization latency. |
| 4-kbit Secured OTP Security Register | Stores cryptographic keys or secure boot configuration; locked after first write - prevents runtime tampering with critical firmware parameters. |
| Serial Flash Discoverable Parameters (SFDP) | Enables automatic host detection of timing parameters, erase block map, and feature flags - simplifies driver porting across flash vendors. |
| Erase/Program Suspend & Resume | Allows host to pause background erase/program to service time-critical interrupts - maintains deterministic real-time response in RTOS environments. |
| Flexible Page Programming (1–256 bytes) | Supports byte-aligned firmware patching without full-page overwrite - preserves adjacent valid data in sparse update scenarios. |
Applications
| Boot Code Storage | Firmware Over-the-Air (OTA) Updates |
|---|---|
Use Scenario: Storing primary bootloader and application firmware for microcontrollers in industrial gateways. IC Role / Device Role / Timing Role: Non-volatile code storage with fast sequential read access and hardware write protection against corruption. Use Value: 66 MB/s Quad I/O read speed enables sub-100 ms firmware load times; 4-kB erase blocks allow selective update of bootloader without disturbing application partition. | Use Scenario: Receiving and validating encrypted firmware images in connected medical devices. IC Role / Device Role / Timing Role: Secure, field-upgradable storage with OTP-protected signature keys and suspend-capable programming. Use Value: 4-kbit secured OTP stores root-of-trust keys; erase/program suspend ensures safe interruption during power-loss-prone OTA sessions. |
| Real-Time Data Logging | Configurable Edge AI Inference Engine |
Use Scenario: Cyclic logging of sensor telemetry in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-power persistent storage with fine-grained 4-kB erase blocks and deep power-down mode. Use Value: 2 µA DPD current extends 10-year battery life; 32-kB block erase aligns with rolling buffer size for predictable wear leveling. | Use Scenario: Storing neural network weights and model metadata in compact vision sensors. IC Role / Device Role / Timing Role: High-bandwidth configuration storage supporting burst reads for weight streaming to accelerator cores. Use Value: 133 MHz QPI interface delivers >500 MB/s effective bandwidth for weight matrix fetch; SFDP auto-configures optimal read commands. |
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 W25Q64JW-IQ | 64 Mbit, 1.7–2.0 V, 133 MHz, same 8-pin DFN package but lacks secured OTP and QPI mode. | Supports only SPI/Dual/Quad I/O; no QPI instruction set or 4-kbit secured OTP register. | Select when QPI compatibility and hardware-secured key storage are not required; lower cost alternative for basic code storage. |
| Micron MT25QL01GBBB8E12-0SIT | 1 Gbit density, 1.7–2.0 V, 133 MHz, identical command set and QPI support, but larger capacity and different pinout (16-pin SOIC/WSON). | Requires PCB redesign due to 16-pin footprint; suited for systems needing future scalability beyond 64 Mbit. | Choose for roadmap flexibility where board space permits larger package and higher density is anticipated in next-gen revisions. |
Compared with W25Q64JW-IQ and MT25QL01GBBB8E12-0SIT, the AT25QL641-SHE-T uniquely combines factory-enabled QPI, secured OTP, and 8-pin DFN packaging - making it optimal for space-constrained, security-aware embedded boot applications requiring minimal layout change.
Availability
AT25QL641-SHE-T is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and automotive infotainment head units requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for AT25QL641-SHE-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 over 40 years of flash memory innovation.
The AT25QL641 belongs to Renesas' high-performance serial NOR flash product line, engineered specifically for secure, low-voltage, high-speed boot code and firmware storage in resource-constrained edge devices.
FAQ
What is the maximum operating frequency and corresponding data throughput of the AT25QL641-SHE-T?
The AT25QL641-SHE-T supports a maximum clock frequency of 133 MHz. In Quad I/O mode using Fast Read Quad I/O (EBh) command, it achieves up to 66 MB/s continuous data transfer. This throughput is derived from 133 MHz × 4 bits per cycle ÷ 8 bits/byte, enabling rapid firmware loading and real-time configuration reads in the AT25QL641-SHE-T.
Does the AT25QL641-SHE-T support hardware write protection for its status registers?
Yes, the AT25QL641-SHE-T provides hardware write protection for status registers via the dedicated WP (Write Protect) pin. When asserted low, WP locks Status Register-1 and Status Register-2 bits including Block Protect (BP2–BP0), Top/Bottom (TB), Sector Protect (SEC), and Status Register Protect (SRP1/SRP0), preventing unintended modification of critical configuration in the AT25QL641-SHE-T.
What erase block sizes does the AT25QL641-SHE-T support, and why does that matter for firmware updates?
The AT25QL641-SHE-T supports 4-kB, 32-kB, 64-kB, and full-chip erase operations. This flexible granularity minimizes wasted space during partial firmware updates - for example, updating only a bootloader section without erasing the entire application image. That efficiency directly improves usable storage density and wear leveling in the AT25QL641-SHE-T.
Is the Quad Enable (QE) bit pre-configured in the AT25QL641-SHE-T at factory shipment?
Yes, the Quad Enable (QE) bit is factory-default enabled in the AT25QL641-SHE-T, allowing immediate use of Quad I/O and QPI commands upon power-up without requiring host-side initialization. This eliminates boot-time register writes and reduces firmware startup latency - a verified behavior documented in Section 7.7 of the AT25QL641-SHE-T datasheet.
How does the 4-kbit secured One-Time Programmable (OTP) register enhance security in the AT25QL641-SHE-T?
The 4-kbit secured OTP register in the AT25QL641-SHE-T stores immutable cryptographic keys, secure boot configuration, or device-specific identifiers. Once programmed, it cannot be altered or read back in plaintext, establishing a hardware root of trust. This capability is essential for anti-cloning and firmware authentication in the AT25QL641-SHE-T.
AT25QL641-SHE-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:
- -
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR (SLC)
- Memory Size:
- 64Mbit
- Memory Organization:
- 8M x 8
- Memory Interface:
- SPI - Quad I/O, QPI
- Clock Frequency:
- 133 MHz
- Write Cycle Time - Word, Page:
- 150µs, 5ms
- Access Time:
- 6 ns
- Voltage - Supply:
- 1.7V ~ 2V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25QL641-SHE-T FAQ
1.How can I place an order for AT25QL641-SHE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25QL641-SHE-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 AT25QL641-SHE-T reliable?
The price and inventory of AT25QL641-SHE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25QL641-SHE-T is usually 5 days.
3.What payment methods are accepted for AT25QL641-SHE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25QL641-SHE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25QL641-SHE-T?
AT25QL641-SHE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25QL641-SHE-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 AT25QL641-SHE-T?
For technical support, including AT25QL641-SHE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25QL641-SHE-T requirements.
6.How does Aetrix verify that AT25QL641-SHE-T is sourced from the original manufacturer or authorized distributors?
All AT25QL641-SHE-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 AT25QL641-SHE-T meets industry standards.
7.What is the process for return or replacement of AT25QL641-SHE-T?
All AT25QL641-SHE-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25QL641-SHE-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 AT25QL641-SHE-T part is unused and in its original packaging.
Return procedure for AT25QL641-SHE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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