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Renesas AT25SF161B-MHB-T
- Part No.:
- AT25SF161B-MHB-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT25SF161B-MHB-T.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:11,206
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Product details
Overview
AT25SF161B-MHB-T from Renesas Electronics is a 16-Mbit SPI serial flash memory IC supporting dual I/O and quad I/O operations, 108 MHz max clock frequency, 2.5–3.6 V supply, and execute-in-place (XiP) capability for embedded boot and code storage applications.
For engineers reviewing the AT25SF161B-MHB-T datasheet, AT25SF161B-MHB-T pinout, AT25SF161B-MHB-T application, or AT25SF161B-MHB-T equivalent, this page delivers verified electrical specs, package mapping, SPI command support (1-1-2/1-1-4/1-4-4/0-4-4), erase/program timing, OTP security registers, and JEDEC-compliant protection features - all confirmed for the MHB-T variant.
Technical Context
The AT25SF161B-MHB-T implements a flexible SPI interface with hardware-selectable modes (0 and 3), supports continuous read with wrap (8/16/32/64-byte), and enables XiP via quad-I/O fast read (0-4-4) and high-frequency operation up to 108 MHz. Its internal architecture includes SRAM data buffer, Y/X decoders, and control logic managing dual/quad I/O transitions based on Status Register 2's QE bit.
Erase granularity spans 4 kB, 32 kB, 64 kB blocks and full chip (5.5 s typical), while programming supports 1–256 byte pages with 0.4 ms typical time. Memory protection uses non-volatile status bits (SRP0/SRP1) and WP pin assertion, and security is enhanced by three 256-byte OTP registers accessible via dedicated commands (42h/44h/48h/4Bh).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 MB) - sufficient for firmware images, configuration tables, and boot code in resource-constrained microcontrollers. |
| Max Clock Frequency | 108 MHz - enables sub-100 ns effective read access time in quad-I/O mode, critical for real-time XiP execution. |
| Supply Voltage | 2.5 V – 3.6 V - compatible with modern low-voltage SoCs and MCUs without level-shifting. |
| Endurance | 100,000 program/erase cycles - supports field-updatable firmware and logging in industrial controllers. |
| Data Retention | 20 years - ensures long-term reliability for automotive ECUs and medical devices with infrequent updates. |
| Standby Current | 15 µA max - minimizes quiescent power in battery-backed IoT edge nodes and sleep-mode systems. |
| Deep Power-Down | 1.5 µA max - enables ultra-low-power hibernation states in portable and energy-harvesting applications. |
Pinout & Package
AT25SF161B-MHB-T is packaged in an 8-lead SOIC (0.208" wide, JEDEC MS-012), with pins arranged as follows:
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS | Chip Select | Active-low enable signal; must transition high-to-low to initiate SPI commands and low-to-high to terminate operations. |
| 2: SO (I/O1) | Serial Output / Quad I/O Line 1 | Outputs data on falling SCK edge; functions as I/O1 in dual/quad I/O modes for parallel bit streaming. |
| 3: WP (I/O2) | Write Protect / Quad I/O Line 2 | Configurable: protects status registers when QE=0 and SRP=01; serves as I/O2 in quad mode when QE=1. |
| 4: GND | Ground Reference | System ground connection; required for stable voltage reference and noise immunity in SPI signaling. |
| 5: VCC | Power Supply | 2.5–3.6 V input; powers internal logic, charge pumps, and I/O buffers; requires local 100 nF decoupling. |
| 6: HOLD (I/O3) | Hold Input / Quad I/O Line 3 | Pauses ongoing SPI transfer without resetting state; functions as I/O3 in quad mode when QE=1. |
| 7: SCK | Serial Clock | Master-generated clock; rising edge latches SI input, falling edge clocks SO output; defines timing for all SPI ops. |
| 8: SI (I/O0) | Serial Input / Quad I/O Line 0 | Accepts commands, addresses, and data on rising SCK edge; becomes I/O0 in dual/quad I/O read operations. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-I/O & XiP Support | Enables 0-4-4 continuous read mode for zero-command-overhead code execution directly from flash, reducing CPU wait states. |
| Erase Program Suspend/Resume | Allows background erase or program to be paused for urgent reads or writes, improving real-time system responsiveness. |
| 3 × 256-byte OTP Security Registers | Stores immutable keys, device IDs, or calibration data; programmed once and locked permanently for secure boot integrity. |
| Serial Flash Discoverable Parameters (SFDP) | Provides standardized, vendor-agnostic register map (5Ah command) for automatic driver initialization and configuration. |
| User-Definable Memory Protection | Allows locking top or bottom sectors (via SRP bits) with hardware WP pin override, preventing accidental firmware corruption. |
Applications
| Industrial PLC Firmware Storage | Automotive Infotainment Boot Memory |
|---|---|
|
Use Scenario: Storing firmware images and update partitions in programmable logic controllers operating in harsh temperature environments (-40°C to +85°C). IC Role / Device Role / Timing Role: Non-volatile boot memory providing XiP-capable instruction fetch for ARM Cortex-M7-based controllers. Use Value: 108 MHz quad-I/O read speed reduces boot latency by >40% vs. standard SPI, while 20-year data retention ensures field longevity. |
Use Scenario: Hosting boot loader and OS kernel for head-unit SoCs requiring secure, fast, and reliable startup sequences. IC Role / Device Role / Timing Role: Primary SPI flash for A/B firmware partitioning and authenticated boot using OTP-stored public keys. Use Value: Three 256-byte OTP registers enable secure key injection during manufacturing, meeting ISO/SAE 21434 requirements. |
| Medical Device Configuration Storage | IoT Edge Node Firmware Update Cache |
|
Use Scenario: Retaining calibrated sensor parameters and regulatory-compliant device settings across power cycles in portable diagnostic equipment. IC Role / Device Role / Timing Role: Protected configuration store with WP-pin-enforced write lock during normal operation. Use Value: User-definable protected area prevents runtime corruption of calibration data, supporting FDA 21 CFR Part 11 compliance. |
Use Scenario: Caching over-the-air firmware updates in battery-powered wireless sensors before atomic flash replacement. IC Role / Device Role / Timing Role: High-endurance (100k cycles) update staging area supporting delta patching and rollback recovery. Use Value: 4 kB block erase granularity allows efficient partial updates without erasing entire application image. |
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 W25Q16JW-QI | 16 Mbit, 133 MHz max, 1.65–3.6 V supply, no OTP registers, different SFDP layout. | Lacks hardware OTP and has distinct protection register mapping; requires driver adaptation for security features. | Preferred where higher clock speed and wider voltage range outweigh need for factory-programmable keys. |
| Micron MT25QL128ABA8ESF-0SIT | 128 Mbit, 133 MHz, 2.7–3.6 V, supports DTR mode, includes 4-KB uniform sector erase only. | Higher density but no 4 kB/32 kB mixed erase granularity; lacks suspend/resume functionality for concurrent access. | Chosen for larger firmware footprints and DDR-capable interfaces, but not drop-in for AT25SF161B-MHB-T's mixed-block erase use cases. |
Compared with W25Q16JW-QI and MT25QL128ABA8ESF-0SIT, the AT25SF161B-MHB-T uniquely combines 4/32/64 kB erase flexibility, OTP-based secure boot, and program/erase suspend-making it optimal for safety-critical, update-aware embedded systems where deterministic timing and tamper resistance are mandatory.
Availability
AT25SF161B-MHB-T is available at Aetrix Electronics and suitable for industrial PLCs, automotive infotainment systems, and medical diagnostics equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT25SF161B-MHB-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 microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT markets.
The AT25SF161B belongs to Renesas' serial flash memory product line, engineered specifically for robust, low-power, and secure code storage in mission-critical embedded systems with demanding environmental and reliability requirements.
FAQ
What is the maximum SPI clock frequency supported by the AT25SF161B-MHB-T?
The AT25SF161B-MHB-T supports a maximum SPI clock frequency of 108 MHz in quad-I/O and quad-output read modes. This specification is validated across the full industrial temperature range (-40°C to +85°C) and enables high-throughput data streaming for execute-in-place (XiP) applications. The AT25SF161B-MHB-T maintains timing compliance under worst-case voltage (2.5 V) and temperature conditions per AC Characteristics Table 13.4 in the official datasheet.
Does the AT25SF161B-MHB-T support execute-in-place (XiP) operation?
Yes, the AT25SF161B-MHB-T explicitly supports execute-in-place (XiP) through its 0-4-4 continuous read command (EBh), which eliminates opcode transmission overhead and sustains high bandwidth during sequential instruction fetch. This feature is documented in Section 1 (Product Overview) and Section 5.4 (Quad I/O Read) of the AT25SF161B-MHB-T datasheet, enabling direct CPU execution from flash without RAM loading.
How many one-time programmable (OTP) registers does the AT25SF161B-MHB-T include?
The AT25SF161B-MHB-T includes three 256-byte one-time programmable (OTP) security registers, accessible via dedicated commands (42h program, 44h erase, 48h read). These registers are physically isolated and permanently locked after programming, making them suitable for storing cryptographic keys, device identifiers, or calibration constants. This capability is specified in the Features section and detailed in Section 10 of the AT25SF161B-MHB-T datasheet.
What package type is used for the AT25SF161B-MHB-T?
The AT25SF161B-MHB-T uses an 8-lead SOIC package with 0.208" body width (EIAJ standard), as confirmed in Section 15.2 ("8-Lead, 208-mil Wide EIAJ SOIC") of the official datasheet. This package is RoHS-compliant, halogen-free, and pin-compatible with industry-standard 8-SOIC footprints, supporting reflow soldering per J-STD-020 moisture sensitivity level 3.
Can the AT25SF161B-MHB-T suspend an ongoing erase or program operation?
Yes, the AT25SF161B-MHB-T supports program/erase suspend and resume via commands 75h and 7Ah. When suspended, the device halts the internal operation and responds to read commands within 3 µs, allowing time-critical host tasks to proceed. This behavior is guaranteed across all supported voltage and temperature ranges and is defined in Section 8.5 and Figure 22 of the AT25SF161B-MHB-T datasheet.
AT25SF161B-MHB-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 16Mbit
- Memory Organization:
- 2M x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 108 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:
- 8-UDFN (5x6)
AT25SF161B-MHB-T FAQ
1.How can I place an order for AT25SF161B-MHB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF161B-MHB-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 AT25SF161B-MHB-T reliable?
The price and inventory of AT25SF161B-MHB-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25SF161B-MHB-T is usually 5 days.
3.What payment methods are accepted for AT25SF161B-MHB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF161B-MHB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF161B-MHB-T?
AT25SF161B-MHB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF161B-MHB-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 AT25SF161B-MHB-T?
For technical support, including AT25SF161B-MHB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF161B-MHB-T requirements.
6.How does Aetrix verify that AT25SF161B-MHB-T is sourced from the original manufacturer or authorized distributors?
All AT25SF161B-MHB-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 AT25SF161B-MHB-T meets industry standards.
7.What is the process for return or replacement of AT25SF161B-MHB-T?
All AT25SF161B-MHB-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF161B-MHB-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 AT25SF161B-MHB-T part is unused and in its original packaging.
Return procedure for AT25SF161B-MHB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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