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Renesas AT25SF161B-SSHD-T
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- Part No.:
- AT25SF161B-SSHD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25SF161B-SSHD-T.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,546
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Product details
Overview
AT25SF161B-SSHD-T from Renesas Electronics is a 16-Mbit SPI serial flash memory IC designed for embedded boot code and XiP (execute-in-place) applications. It supports dual I/O (1-2-2) and quad I/O (1-4-4, 0-4-4) read modes, operates up to 108 MHz, delivers 15 µA standby current, and features 4 kB/32 kB/64 kB block erase with 100,000 program/erase cycles endurance.
For engineers reviewing the AT25SF161B-SSHD-T datasheet, AT25SF161B-SSHD-T pinout, AT25SF161B-SSHD-T application, or AT25SF161B-SSHD-T equivalent, key selection criteria include SPI mode 0/3 compatibility, quad-I/O XiP support, 2.5–3.6 V supply range, deep power-down (1.5 µA), and OTP security register availability.
Technical Context
The AT25SF161B-SSHD-T implements a flexible SPI interface supporting standard, dual-output (1-1-2), dual-I/O (1-2-2), quad-output (1-1-4), and quad-I/O (1-4-4, 0-4-4) command protocols. Its memory array is organized into 4 kB sectors, 32 kB and 64 kB blocks, and supports continuous read with wrap lengths of 8/16/32/64 bytes.
Internal control logic enables erase/program suspend-resume, SFDP register access, and configurable protection via status register bits SRP0/SRP1 and WP pin. Security is enhanced by three 256-byte OTP registers and unique ID read (4Bh command), all accessible over the same SPI bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 MB) - sufficient for firmware images in microcontroller boot loaders and IoT edge devices. |
| Max Clock Frequency | 108 MHz - enables high-throughput code fetch in XiP configurations without external cache. |
| Erase Granularity | 4 kB / 32 kB / 64 kB blocks + full chip - allows independent update of application code and configuration data. |
| Program Time | 0.4 ms typical per page (1–256 bytes) - supports fast field firmware updates with minimal downtime. |
| Power Consumption | 1.5 µA deep power-down - extends battery life in always-on sensor nodes and wearable systems. |
| Data Retention | 20 years - meets long-lifecycle requirements for industrial controllers and medical equipment. |
| Endurance | 100,000 P/E cycles - suitable for logging, parameter storage, and infrequent OTA update scenarios. |
Pinout & Package
AT25SF161B-SSHD-T is packaged in an 8-lead SOIC (0.208" wide), JEDEC-compliant surface-mount package with gull-wing leads. Pin 1 is marked by a beveled corner or dot; pin numbering follows standard counter-clockwise convention from top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition low-to-high to complete commands and enter standby. |
| SCK | Serial Clock | Input clock driving SPI timing; rising edge latches SI, falling edge clocks SO. |
| SI (I/O0) | Serial Input / Quad I/O 0 | Command/address/data input; becomes bidirectional I/O0 during dual/quad I/O reads. |
| SO (I/O1) | Serial Output / Quad I/O 1 | Data output in standard mode; becomes bidirectional I/O1 during dual/quad I/O reads. |
| WP (I/O2) | Write Protect / Quad I/O 2 | Hardware write lock for status registers when QE=0; functions as I/O2 when QE=1. |
| HOLD (I/O3) | Hold / Quad I/O 3 | Pauses ongoing SPI transfer without resetting state; serves as I/O3 in quad-I/O mode. |
| VCC | Power Supply | 2.5–3.6 V operation - compatible with modern low-voltage MCUs and PMIC rails. |
| GND | Ground Reference | System ground return path; requires low-impedance connection for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-I/O XiP Support (0-4-4) | Eliminates opcode overhead per read burst, enabling deterministic real-time code execution directly from flash. |
| Erase/Program Suspend-Resume | Allows background firmware update while servicing time-critical interrupts - critical for automotive ECUs. |
| 3 × 256-byte OTP Security Registers | Stores immutable keys, calibration data, or device-specific credentials resistant to reprogramming. |
| Serial Flash Discoverable Parameters (SFDP) | Enables automatic configuration by host bootloader without hard-coded timing or command tables. |
| User-Definable Memory Protection | Configurable lock regions at memory start/end via status register bits - prevents accidental overwrite of boot code. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Device Boot Memory |
|---|---|
Use Scenario: Storing and executing ladder logic firmware in programmable logic controllers with zero-latency startup. IC Role / Device Role / Timing Role: Primary boot memory providing XiP execution and secure firmware update partitioning. Use Value: 108 MHz quad-I/O read speed reduces instruction fetch latency; 4 kB erase granularity isolates runtime parameters from application code. |
Use Scenario: Hosting MCU bootloader and sensor fusion firmware in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Nonvolatile storage for boot image and OTA update staging area with deep power-down support. Use Value: 1.5 µA deep power-down extends multi-year battery life; SFDP enables plug-and-play compatibility across MCU platforms. |
| Medical Diagnostic Instrument Code Storage | Automotive ADAS Camera Module Flash |
Use Scenario: Holding certified diagnostic algorithms and calibration data in portable ultrasound units requiring 20-year data retention. IC Role / Device Role / Timing Role: Secure, long-life code and configuration storage with OTP register-based key binding. Use Value: 20-year data retention meets FDA regulatory requirements; 3×256-byte OTP registers store cryptographic keys immune to field reprogramming. |
Use Scenario: Storing camera ISP firmware and lens correction profiles in automotive surround-view systems operating at -40°C to +85°C. IC Role / Device Role / Timing Role: High-reliability flash memory supporting AEC-Q100 Grade 3 temperature range and rapid firmware patching. Use Value: 100,000 P/E cycles allow frequent calibration updates; quad-I/O mode accelerates boot within strict ASIL-B timing budgets. |
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 W25Q16JWQ | 16 Mbit, 133 MHz max, 1.65–3.6 V supply, no OTP registers, supports octal DTR mode. | Lacks OTP security and SFDP v1.6 compliance; optimized for higher-speed non-XiP data logging. | Select when maximum read bandwidth is prioritized over XiP determinism and hardware security. |
| Macronix MX25L1633F | 16 Mbit, 104 MHz max, 2.7–3.6 V supply, includes 3×256-byte OTP, but no 0-4-4 XiP mode. | Supports dual/quad I/O but lacks continuous-read 0-4-4 command - limits XiP efficiency in real-time systems. | Choose when OTP security is required but XiP timing predictability is secondary to cost. |
Compared with W25Q16JWQ and MX25L1633F, the AT25SF161B-SSHD-T uniquely combines 0-4-4 XiP mode, SFDP v1.6, and OTP registers within a 2.5–3.6 V envelope - making it optimal for safety-critical embedded boot applications demanding both performance and tamper resistance.
Availability
AT25SF161B-SSHD-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, IoT edge device boot memory, and medical diagnostic instrument code storage requiring stable component supply across extended product lifecycles.
Supply support for AT25SF161B-SSHD-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 AT25SF161B-SSHD-T belongs to Renesas' AT25SF family of SPI flash memories engineered for robust, low-power, and secure embedded boot and XiP use cases in harsh environments.
FAQ
What voltage range does the AT25SF161B-SSHD-T support?
The AT25SF161B-SSHD-T supports two supply ranges: 2.7–3.6 V and 2.5–3.6 V. This dual-voltage capability ensures compatibility with both legacy 3.3 V systems and newer ultra-low-power designs using 2.5 V rails. The AT25SF161B-SSHD-T maintains full functionality-including 108 MHz operation and quad-I/O-across the entire 2.5–3.6 V window, eliminating need for level shifters in mixed-voltage architectures.
Does the AT25SF161B-SSHD-T support execute-in-place (XiP) operation?
Yes, the AT25SF161B-SSHD-T explicitly supports XiP via its 0-4-4 quad-I/O read command, which eliminates opcode transmission overhead and enables deterministic, high-bandwidth code fetch directly from flash. Combined with continuous read mode and 108 MHz clocking, the AT25SF161B-SSHD-T delivers low-latency instruction execution suitable for real-time embedded applications without external RAM buffering.
How many one-time programmable (OTP) registers does the AT25SF161B-SSHD-T include?
The AT25SF161B-SSHD-T integrates three 256-byte OTP security registers, accessible via dedicated commands (42h/44h/48h). These registers are physically fuse-based and cannot be erased or rewritten after programming, making them ideal for storing cryptographic keys, device identifiers, or calibration constants. The AT25SF161B-SSHD-T uses these registers to enforce hardware-rooted security in boot authentication flows.
What is the erase time for a 4 kB sector on the AT25SF161B-SSHD-T?
The typical erase time for a 4 kB block on the AT25SF161B-SSHD-T is 50 ms, as specified in the datasheet under "Flexible erase architecture and time." This value is measured under standard conditions (VCC = 3.0 V, TA = 25°C) and applies to the 20h command. The AT25SF161B-SSHD-T also supports suspend/resume during erase, allowing interruption for higher-priority tasks without compromising sector integrity.
Is the AT25SF161B-SSHD-T compliant with RoHS and green packaging standards?
Yes, the AT25SF161B-SSHD-T is manufactured in industry-standard green (Pb/Halide-free/RoHS-compliant) packages, including the 8-lead SOIC (0.208" wide) variant indicated by the "-SSHD-T" suffix. Renesas certifies full compliance with EU RoHS Directive 2011/65/EU and JIS C 0950, with material declarations available upon request. The AT25SF161B-SSHD-T meets environmental requirements for industrial, medical, and consumer deployments.
AT25SF161B-SSHD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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, 1.8ms
- Access Time:
- 7 ns
- Voltage - Supply:
- 2.5V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25SF161B-SSHD-T FAQ
1.How can I place an order for AT25SF161B-SSHD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF161B-SSHD-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-SSHD-T reliable?
The price and inventory of AT25SF161B-SSHD-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-SSHD-T is usually 5 days.
3.What payment methods are accepted for AT25SF161B-SSHD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF161B-SSHD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF161B-SSHD-T?
AT25SF161B-SSHD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF161B-SSHD-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-SSHD-T?
For technical support, including AT25SF161B-SSHD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF161B-SSHD-T requirements.
6.How does Aetrix verify that AT25SF161B-SSHD-T is sourced from the original manufacturer or authorized distributors?
All AT25SF161B-SSHD-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-SSHD-T meets industry standards.
7.What is the process for return or replacement of AT25SF161B-SSHD-T?
All AT25SF161B-SSHD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF161B-SSHD-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-SSHD-T part is unused and in its original packaging.
Return procedure for AT25SF161B-SSHD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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