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Renesas AT25SF128A-CCUB-T
- Part No.:
- AT25SF128A-CCUB-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 24-TBGA
- Datasheet:
-
AT25SF128A-CCUB-T.pdf
- Description:
- IC FLSH 128MBIT SPI/QUAD 24TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,208
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Product details
Overview
AT25SF128A-CCUB-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-CCUB-T datasheet, AT25SF128A-CCUB-T pinout, AT25SF128A-CCUB-T application, or AT25SF128A-CCUB-T equivalent, key selection criteria include XiP-optimized continuous read mode, quad-SPI timing compliance, industrial temperature range (-40 °C to 85 °C), 100,000 program/erase cycles, and OTP security register support.
Technical Context
This device implements a standard SPI interface with configurable dual- and quad-I/O operation enabled via non-volatile Quad Enable (QE) bit in Status Register 2. The AT25SF128A-CCUB-T ships with QE = 0, requiring explicit configuration for quad-mode use - unlike the AT25QF128A variant which ships with QE = 1.
It supports flexible memory protection via user-definable protected areas (start/end of array), WP pin control, and three 256-byte One-Time Programmable (OTP) security registers. SFDP register enables host auto-discovery of flash parameters without hard-coded assumptions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 128 Mbit (16 MB) - sufficient for firmware images, boot loaders, and configuration data in resource-constrained embedded systems. |
| Interface | SPI with modes 0/3, dual I/O (1-1-2), quad I/O (1-4-4, 0-4-4) - enables scalable bandwidth from ~40 MB/s (standard) to ~160 MB/s (quad) depending on clock and command choice. |
| Max Read Speed | 133 MHz at 85 °C - supports low-latency XiP execution with minimal wait states when paired with compatible host controllers. |
| Erase Granularity | 4 kB / 32 kB / 64 kB blocks and full chip - allows fine-grained firmware updates without erasing entire memory space. |
| Endurance & Retention | 100,000 program/erase cycles; 20 years data retention at 85 °C - meets long-life requirements for industrial and automotive control units. |
| Power Modes | Standby current 13 µA (typ), deep power-down 2 µA (typ) - enables ultra-low-power sleep states in battery-backed or energy-harvesting applications. |
| Operating Temp | -40 °C to +85 °C (industrial grade) - validated for deployment in factory automation, motor drives, and outdoor IoT gateways. |
Pinout & Package
AT25SF128A-CCUB-T uses an 8-pad DFN package measuring 5 mm × 6 mm × 0.6 mm (JEDEC MO-229, variant WD). Pin functions are electrically identical across supported packages but physically mapped to this compact footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable signal; must fall before any command; internal pull-up not present - requires external 10 kΩ pull-up to VCC for reliable power-up sequencing. |
| SO / I/O1 | Serial output / quad I/O | Output-only in standard SPI; becomes bidirectional I/O1 during dual/quad commands - critical for high-speed read throughput and command feedback. |
| WP / I/O2 | Write protect / quad I/O | Hardware write-protection when QE = 0; reconfigured as I/O2 in quad mode - internal pull-up allows floating if unused, but must be driven for quad operation. |
| GND | Ground reference | Common return path for VCC and all I/O signals; requires low-inductance connection to minimize noise coupling into SPI timing paths. |
| VCC | Core & I/O supply | Single 2.7–3.6 V rail powering logic, memory array, and I/O buffers - decoupling with 0.1–1 µF low-ESR capacitor near pins is mandatory for stable high-frequency operation. |
| HOLD / I/O3 | Transfer pause / quad I/O | Halts ongoing SPI transfer without resetting state; becomes I/O3 in quad mode - internal pull-up permits floating use, but active drive required for quad functionality. |
| SCK | Serial clock input | Master-generated clock synchronizing all data transfers; rising edge latches inputs, falling edge outputs data - timing margins tighten above 80 MHz, requiring controlled trace impedance. |
| SI / I/O0 | Serial input / quad I/O | Command/address/data input in standard SPI; bidirectional I/O0 in dual/quad modes - shares physical pin with I/O0, enabling full 4-line quad communication when QE is set. |
Key Features
| Feature | Design Value |
|---|---|
| Continuous Read Mode (8/16/32/64-byte wrap) | Eliminates repeated command opcodes during sequential code fetch, reducing bus overhead by >30% vs. standard Fast Read in XiP scenarios. |
| Quad I/O Support (0-4-4, 1-4-4) | Enables true 4-bit-per-cycle data transfer, doubling bandwidth over dual I/O and quadrupling over standard SPI - essential for real-time firmware streaming. |
| Erase/Program Suspend & Resume | Allows background operations (e.g., logging) to interrupt long erase/program cycles, then resume - improves system responsiveness in multitasking environments. |
| 3 × 256-byte OTP Security Registers | Provides tamper-resistant storage for keys, calibration data, or device-unique identifiers - accessible only via dedicated security commands, not standard read/write. |
| Serial Flash Discoverable Parameters (SFDP) | Standardized JEDEC register allowing host to auto-detect geometry, timing, and feature set - eliminates hardcoded flash initialization tables in bootloader code. |
Applications
| Industrial PLC Firmware Storage | Automotive ADAS Boot Memory |
|---|---|
Use Scenario: Storing firmware and configuration data for programmable logic controllers operating in harsh factory environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Primary non-volatile code storage with XiP capability, directly executed by ARM Cortex-M7 MCU during runtime. Use Value: 20-year data retention at 85 °C and 100,000 endurance cycles ensure field reliability over 15+ year product lifecycles without firmware corruption. | Use Scenario: Holding boot code and safety-critical sensor fusion algorithms for camera/radar processing units in autonomous driving systems. IC Role / Device Role / Timing Role: Secure, high-bandwidth boot memory interfaced via quad-SPI to reduce boot time below 500 ms per ISO 26262 ASIL-B requirements. Use Value: OTP registers store cryptographic keys used for secure boot verification; quad I/O achieves >120 MB/s effective read rate at 105 °C derated timing. |
| IoT Edge Gateway Configuration | Medical Imaging Device Parameter Storage |
Use Scenario: Persisting network credentials, OTA update metadata, and device-specific calibration profiles in battery-powered cellular gateways deployed remotely. IC Role / Device Role / Timing Role: Low-power configuration store accessed intermittently; deep power-down mode reduces quiescent current to 2 µA between transmissions. Use Value: 2 µA deep power-down current extends 10-year battery life in sealed deployments; SFDP simplifies firmware portability across gateway hardware revisions. | Use Scenario: Archiving DICOM header templates, modality-specific calibration curves, and regulatory audit logs in portable ultrasound and X-ray systems. IC Role / Device Role / Timing Role: Certified non-volatile memory storing FDA-mandated traceability data with write-protection enforced via WP pin and status register lock bits. Use Value: User-definable protected area prevents accidental overwrite of calibration data; 133 MHz read speed accelerates image pre-processing pipeline initialization. |
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 |
|---|---|---|---|
| Winbond W25Q128JVSIM | Same density (128 Mbit), 3.3 V, quad-SPI, 133 MHz max read, but lacks OTP registers and SFDP v1.6 support; uses different status register layout. | Supports basic XiP and OTA updates but offers no hardware-enforced key storage or auto-discoverable parameter tables. | Select when cost sensitivity outweighs need for OTP security or SFDP-driven bootloader flexibility. |
| Micron MT25QL128ABA8E12-0SIT | Identical 128 Mbit density, 3.3 V, quad-SPI, 133 MHz, includes SFDP and 3×256B OTP; differs in hold timing, erase suspend behavior, and default QE state (shipped enabled). | Drop-in compatible for most quad-SPI designs but requires validation of HOLD timing and reset recovery sequence due to tighter AC specs. | Select when existing design targets Micron's ecosystem tools or requires guaranteed QE=1 out-of-box for immediate quad-mode operation. |
Compared with W25Q128JVSIM, AT25SF128A-CCUB-T adds OTP security and SFDP v1.6 for robust bootloader portability; versus MT25QL128ABA8E12-0SIT, it ships with QE=0 - simplifying legacy SPI migration but requiring explicit QE setup for quad performance.
Availability
AT25SF128A-CCUB-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ADAS boot memory, and IoT edge gateway configuration requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT25SF128A-CCUB-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 enterprise applications.
The AT25SF128A-CCUB-T belongs to Renesas' AT25SF/QF serial NOR flash family, engineered for high-reliability embedded systems demanding fast XiP execution, flexible memory protection, and extended data retention under thermal stress.
FAQ
What is the default Quad Enable (QE) state for AT25SF128A-CCUB-T at power-up?
The AT25SF128A-CCUB-T ships from the factory with the Quad Enable (QE) bit in Status Register 2 set to 0. This means quad-SPI mode is disabled by default, and the WP and HOLD pins function as write-protect and hold controls respectively. To enable quad I/O, software must first issue Write Enable, then modify Status Register 2 to set QE = 1 - a non-volatile change persisting across power cycles. This differs from the AT25QF128A variant, which ships with QE = 1.
Does AT25SF128A-CCUB-T support execute-in-place (XiP) operation, and what features optimize it?
Yes, AT25SF128A-CCUB-T is explicitly designed for eXecute-in-Place (XiP) operation. Key optimizations include Continuous Read mode (with 8/16/32/64-byte wrap) eliminating repeated command opcodes, quad-SPI interface enabling up to 133 MHz effective read rates, and low-latency fast read commands. These features collectively reduce instruction fetch latency and improve deterministic code execution directly from flash - critical for real-time embedded applications where RAM footprint is constrained.
How many One-Time Programmable (OTP) security registers does AT25SF128A-CCUB-T provide, and what is their purpose?
AT25SF128A-CCUB-T provides three 256-byte One-Time Programmable (OTP) security registers. These registers are write-once, read-many memory blocks intended for storing immutable data such as cryptographic keys, device-unique identifiers, calibration constants, or regulatory compliance information. Access requires dedicated security commands (Read/Erase/Program Security Registers), and they reside outside the main memory array - ensuring separation from firmware updates and preventing accidental overwrite during normal operation.
What package type is used by AT25SF128A-CCUB-T, and what are its mechanical dimensions?
AT25SF128A-CCUB-T uses an 8-pad DFN (Dual Flat No-lead) package with dimensions of 5.0 mm × 6.0 mm × 0.6 mm (JEDEC MO-229 WD variant). This compact, surface-mount package features exposed pad thermal enhancement and is RoHS-compliant, halogen-free, and lead-free. It is pin-compatible with other 8-pin DFN variants in the AT25SF/QF128A family but distinct from the 8-lead SOIC (208-mil) and 16-lead SOIC (300-mil) options.
Can AT25SF128A-CCUB-T operate across the full industrial temperature range, and what are its rated specifications at 105 °C?
AT25SF128A-CCUB-T is rated for the industrial temperature range of -40 °C to +85 °C. While it may function at 105 °C, its guaranteed specifications - including maximum read speed (120 MHz), endurance (100,000 cycles), and data retention (10 years) - are only validated up to 85 °C. For extended temperature operation, Renesas offers the AT25QF128A variant, which is explicitly qualified for -40 °C to +105 °C and maintains full 133 MHz read performance at that upper limit.
AT25SF128A-CCUB-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-TBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TFBGA (6x8)
AT25SF128A-CCUB-T FAQ
1.How can I place an order for AT25SF128A-CCUB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF128A-CCUB-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-CCUB-T reliable?
The price and inventory of AT25SF128A-CCUB-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-CCUB-T is usually 5 days.
3.What payment methods are accepted for AT25SF128A-CCUB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF128A-CCUB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF128A-CCUB-T?
AT25SF128A-CCUB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF128A-CCUB-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-CCUB-T?
For technical support, including AT25SF128A-CCUB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF128A-CCUB-T requirements.
6.How does Aetrix verify that AT25SF128A-CCUB-T is sourced from the original manufacturer or authorized distributors?
All AT25SF128A-CCUB-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-CCUB-T meets industry standards.
7.What is the process for return or replacement of AT25SF128A-CCUB-T?
All AT25SF128A-CCUB-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF128A-CCUB-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-CCUB-T part is unused and in its original packaging.
Return procedure for AT25SF128A-CCUB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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