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Renesas AT25SF128A-SHBHD-T
- Part No.:
- AT25SF128A-SHBHD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25SF128A-SHBHD-T.pdf
- Description:
- IC FLASH 128MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,580
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Product details
Overview
AT25SF128A-SHBHD-T from Renesas Electronics is a 128-Mbit Serial NOR Flash memory IC supporting SPI modes 0/3, dual I/O (1-1-2), and quad I/O (1-4-4, 0-4-4) for high-speed code storage and eXecute-in-Place (XiP) in microcontroller-based systems. It operates from 2.7 V to 3.6 V, delivers up to 133 MHz read speed at 85 °C, and features 4 kB/32 kB/64 kB block erase with typical times of 70 ms / 150 ms / 250 ms.
For engineers reviewing the AT25SF128A-SHBHD-T datasheet, AT25SF128A-SHBHD-T pinout, AT25SF128A-SHBHD-T application, or AT25SF128A-SHBHD-T equivalent, key selection criteria include XiP-optimized continuous read mode, OTP security registers, SFDP compliance, JEDEC-standard ID support, and industrial temperature range (-40 °C to +85 °C) with RoHS-compliant 8-pad DFN (5 × 6 × 0.6 mm) packaging.
Technical Context
This device implements a standard SPI interface with configurable dual- and quad-I/O operation enabled via the non-volatile Quad Enable (QE) bit in Status Register 2 - factory-defaulted to 0 for AT25SF128A variants. It supports command-locked memory protection using SRP0/SRP1 bits and user-definable protected areas at memory start or end.
Internal architecture includes three 256-byte One-Time Programmable (OTP) security registers, Serial Flash Discoverable Parameters (SFDP) register for host auto-configuration, and erase/program suspend-resume capability for real-time system responsiveness during background operations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 128 Mbit (16 MB) - sufficient for firmware images, boot code, and configuration data in resource-constrained embedded systems. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with common 3.3 V logic rails and tolerant of minor rail droop during transient load conditions. |
| Max Read Speed | 133 MHz at 85 °C - enables sub-100 ns effective access time for XiP applications requiring low-latency instruction fetch. |
| Erase Time (4 kB block) | 70 ms typical - allows rapid field firmware updates without excessive downtime in OTA-capable devices. |
| Endurance | 100,000 program/erase cycles - supports robust logging, parameter storage, and over-the-air update staging in industrial controllers. |
| Data Retention | 20 years at 85 °C - ensures long-term reliability for mission-critical firmware storage in unattended equipment. |
| Operating Temp | -40 °C to +85 °C (industrial grade) - validated for deployment in factory automation, networking gear, and outdoor IoT gateways. |
Pinout & Package
AT25SF128A-SHBHD-T uses an 8-pad DFN package measuring 5 mm × 6 mm × 0.6 mm, with wettable flank leads for automated optical inspection (AOI) and enhanced solder joint reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable signal; must fall before first clock edge of any command; internal pull-up not present - requires external 10 kΩ pull-up to VCC for robust power-up sequencing. |
| SO / I/O1 | Bidirectional serial data output/input | Single-bit output (SO) in standard SPI; becomes I/O1 in dual/quad modes - supports full-duplex data transfer during fast read and program commands. |
| WP / I/O2 | Write protect input / quad I/O | Factory-configured as WP (QE = 0); functions as I/O2 when QE = 1 - internal pull-up allows floating if unused, but must be driven for quad mode or hardware write lock. |
| GND | Ground reference | Common return path for VCC and all I/O signals; requires low-inductance connection to PCB ground plane to minimize noise coupling into SPI timing margins. |
| VCC | Core & I/O supply | Single 2.7–3.6 V rail powering all logic and memory array; decoupling with 0.1–1 µF low-ESR capacitor near pins is mandatory for stable read/write operation. |
| HOLD / I/O3 | Transfer pause input / quad I/O | Pauses ongoing SPI transaction without resetting state machine; becomes I/O3 in quad mode - internal pull-up permits floating use, but must be controlled for HOLD functionality. |
| SCK | Serial clock input | Edge-triggered master clock; data latched on rising edge, output shifted on falling edge - timing critical for >100 MHz operation per AC specs. |
| SI / I/O0 | Serial input / quad I/O | Command/address/data input in standard SPI; becomes I/O0 in dual/quad modes - bidirectional operation enables simultaneous address+data transfer in quad I/O fast read. |
Key Features
| Feature | Design Value |
|---|---|
| Continuous Read Mode (0-4-4) | Eliminates opcode retransmission overhead, enabling true burst reads for XiP - reduces average instruction fetch latency by ~30% vs. standard fast read. |
| Three 256-byte OTP Registers | Immutable storage for cryptographic keys, device certificates, or calibration data - prevents tampering while eliminating need for external secure elements. |
| SFDP Register Support | Enables automatic host detection of memory geometry, timing parameters, and command set - simplifies driver development and eliminates hard-coded flash initialization sequences. |
| Erase/Program Suspend-Resume | Allows interruption of long-duration background operations (e.g., 250 ms 64 kB erase) to service urgent read requests - maintains real-time system responsiveness. |
| User-Configurable I/O Drive Strength | DRV1/DRV0 bits adjust output current to match trace impedance and reduce EMI - critical for reliable 133 MHz signaling across varied PCB layouts. |
Applications
| Industrial PLC Firmware Storage | Automotive Infotainment Boot Memory |
|---|---|
Use Scenario: Storing firmware images and configuration tables for programmable logic controllers operating in harsh factory environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Primary non-volatile code storage with eXecute-in-Place capability, directly feeding ARM Cortex-M7 instruction bus via quad-SPI interface. Use Value: 20-year data retention at 85 °C and 100,000-cycle endurance ensure firmware integrity over 15+ year product lifecycles without field replacement. | Use Scenario: Hosting boot loader and safety-critical OS kernel for head unit ECUs requiring ASIL-B compliant startup sequence and secure firmware validation. IC Role / Device Role / Timing Role: Secure boot memory with OTP registers storing root-of-trust keys and SFDP-enabled dynamic timing adaptation across temperature zones. Use Value: Hardware write protection (via WP pin + SRP bits) prevents unauthorized firmware modification during vehicle service or diagnostics sessions. |
| Medical Imaging Device Configuration | Smart Energy Meter Firmware |
Use Scenario: Storing calibration coefficients, sensor profiles, and regulatory-compliant diagnostic routines in portable ultrasound and X-ray control units. IC Role / Device Role / Timing Role: Parameter and firmware repository with continuous read mode enabling deterministic image processing pipeline initialization. Use Value: 133 MHz read speed at 85 °C ensures sub-50 ms boot-to-ready time even after cold start in clinical environments. | Use Scenario: Holding AMI firmware, tariff tables, and encryption keys in utility-grade smart meters deployed in outdoor enclosures with extended temperature exposure. IC Role / Device Role / Timing Role: Long-life firmware storage with deep power-down mode (2 µA) minimizing battery drain during meter sleep cycles. Use Value: 10-year data retention at 105 °C guarantees firmware persistence through decades of thermal cycling in tropical climates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Serial NOR Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX25L12833FZC-10G | 128 Mbit, 104 MHz max read, no OTP registers, supports only 1-1-4 (not 0-4-4 or 1-4-4), no SFDP v1.6 support | Lacks continuous read mode and OTP security - unsuitable for XiP-critical or secure boot designs | Select AT25SF128A-SHBHD-T when XiP latency, firmware security, or host auto-configuration via SFDP are required. |
| S25FL128SAGMFI000 | 128 Mbit, 133 MHz read, includes 128-byte OTP, supports 0-4-4, but requires external VIO supply (1.7–2.0 V) for I/O | Additional power rail complexity increases BOM cost and layout effort; incompatible with single-supply 3.3 V systems | Choose AT25SF128A-SHBHD-T for simplified single-rail design, guaranteed 2.7–3.6 V operation, and integrated drive strength control. |
Compared with MX25L12833FZC-10G and S25FL128SAGMFI000, AT25SF128A-SHBHD-T uniquely combines 0-4-4 continuous read, three 256-byte OTP registers, and SFDP v1.6 compliance in a single 3.3 V supply, making it optimal for secure, low-latency, and auto-configurable embedded firmware storage.
Availability
AT25SF128A-SHBHD-T is available at Aetrix Electronics and suitable for industrial automation, automotive infotainment, medical imaging, and smart energy metering applications requiring stable component supply, long-term firmware integrity, and secure boot capabilities.
Supply support for AT25SF128A-SHBHD-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 microcontrollers, analog, power, and memory solutions for industrial, automotive, and enterprise applications.
The AT25SF128A belongs to Renesas' Serial NOR Flash product line, engineered specifically for high-reliability embedded systems demanding secure, low-latency, and long-life code storage with advanced SPI protocol support.
FAQ
What is the factory default Quad Enable (QE) bit setting for AT25SF128A-SHBHD-T?
The AT25SF128A-SHBHD-T ships with the Quad Enable (QE) bit in Status Register 2 set to 0, disabling quad-I/O mode at power-up. This allows immediate use in standard or dual-SPI configurations without register modification. The QE bit can be permanently enabled via Write Status Register command if quad operation is required.
Does AT25SF128A-SHBHD-T support execute-in-place (XiP) operation, and what features enable it?
Yes, AT25SF128A-SHBHD-T is explicitly designed for XiP. Key enablers include continuous read mode (0-4-4 command), which eliminates opcode overhead for sequential instruction fetch, and 133 MHz read speed at 85 °C, ensuring low-latency access. Its 4 kB uniform erase blocks also align with typical MCU cache line sizes for efficient code updates.
How many One-Time Programmable (OTP) registers does AT25SF128A-SHBHD-T provide, and what are their sizes?
AT25SF128A-SHBHD-T provides three independent 256-byte One-Time Programmable (OTP) security registers. Each register can be programmed once and retains data for 20 years at 85 °C. They are commonly used to store cryptographic keys, device-specific certificates, or factory calibration data that must remain immutable after programming.
What package type is used by AT25SF128A-SHBHD-T, and what are its mechanical dimensions?
AT25SF128A-SHBHD-T uses an 8-pad DFN package with dimensions of 5.0 mm × 6.0 mm × 0.6 mm and wettable flank leads. This compact, RoHS-compliant package supports automated optical inspection and offers superior thermal performance compared to SOIC, making it ideal for space-constrained industrial and automotive PCBs.
Can AT25SF128A-SHBHD-T operate across the full industrial temperature range, and what are its rated limits?
Yes, AT25SF128A-SHBHD-T is rated for the industrial temperature range of -40 °C to +85 °C. Electrical specifications including 133 MHz read speed, 70 ms 4 kB erase time, and 100,000 program/erase cycles are guaranteed across this full range. Data retention is specified at 20 years at 85 °C and 10 years at 105 °C for extended use cases.
AT25SF128A-SHBHD-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:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 128Mbit
- Memory Organization:
- 16M x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 133 MHz
- Write Cycle Time - Word, Page:
- 50µs, 2.4ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25SF128A-SHBHD-T FAQ
1.How can I place an order for AT25SF128A-SHBHD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF128A-SHBHD-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 AT25SF128A-SHBHD-T reliable?
The price and inventory of AT25SF128A-SHBHD-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25SF128A-SHBHD-T is usually 5 days.
3.What payment methods are accepted for AT25SF128A-SHBHD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF128A-SHBHD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF128A-SHBHD-T?
AT25SF128A-SHBHD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF128A-SHBHD-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 AT25SF128A-SHBHD-T?
For technical support, including AT25SF128A-SHBHD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF128A-SHBHD-T requirements.
6.How does Aetrix verify that AT25SF128A-SHBHD-T is sourced from the original manufacturer or authorized distributors?
All AT25SF128A-SHBHD-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 AT25SF128A-SHBHD-T meets industry standards.
7.What is the process for return or replacement of AT25SF128A-SHBHD-T?
All AT25SF128A-SHBHD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF128A-SHBHD-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 AT25SF128A-SHBHD-T part is unused and in its original packaging.
Return procedure for AT25SF128A-SHBHD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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