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Renesas AT25SF161-SSHD-T
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- Part No.:
- AT25SF161-SSHD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25SF161-SSHD-T.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,118
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Product details
Overview
AT25SF161-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 in industrial and connected devices. 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.
For engineers reviewing the AT25SF161-SSHD-T datasheet, AT25SF161-SSHD-T pinout, AT25SF161-SSHD-T application, or AT25SF161-SSHD-T equivalent, key selection criteria include SPI mode 0/3 compatibility, quad-I/O timing support for XiP latency reduction, OTP security register availability, SFDP compliance, and SOIC-8 narrow-body (0.150") packaging with WP/HOLD dual-function pins.
Technical Context
The AT25SF161-SSHD-T implements a flexible SPI interface supporting standard single-I/O, 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 sets - enabling high-throughput read operations without host-side address management overhead. Its continuous read mode eliminates opcode retransmission during burst access.
Internally, it integrates SRAM data buffers, Y/X decoders, and protection logic supporting non-volatile status register locking, user-definable memory array protection zones, and three 256-byte one-time programmable security registers. Erase suspend/resume capability allows background operation interruption without data loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 MB) organized as 2,097,152 bytes; enables full firmware image storage for mid-tier microcontrollers. |
| Max Clock Frequency | 108 MHz in quad-I/O mode; achieves ~432 MB/s effective throughput for XiP-critical latency-sensitive systems. |
| Erase Granularity | 4 kB, 32 kB, 64 kB blocks and full-chip; supports independent code/data partitioning with minimal write disturbance. |
| Program Time | 0.4 ms typical for 1–256 byte page writes; enables fast field updates and configuration parameter storage. |
| Power Consumption | 15 µA max standby, 1.5 µA max deep power-down; suitable for battery-backed or energy-harvesting edge nodes. |
| Data Retention | 20 years at 85°C; meets long-life requirements for industrial control and infrastructure equipment. |
| Endurance | 100,000 program/erase cycles per sector; sufficient for firmware update logs and runtime parameter logging. |
Pinout & Package
AT25SF161-SSHD-T uses an 8-lead SOIC package (0.150" narrow body, JEDEC MS-012), with lead finish Pb/Halide-free and RoHS compliance. Pin 1 is CS (chip select), pin 8 is VCC, and pin 4 is GND - standard layout compatible with legacy PCB footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition low before SCK rising edge to initiate command sequence; internal 10 kΩ pull-up recommended for power-up sequencing. |
| SCK | Serial Clock | Input clock for SPI interface; all input data latched on rising edge, output data driven on falling edge; supports up to 108 MHz. |
| SI (I/O0) | Serial Input / Quad I/O Lane 0 | Primary command/address/data input; becomes bidirectional I/O0 during dual/quad I/O reads; high-impedance when CS deasserted. |
| SO (I/O1) | Serial Output / Quad I/O Lane 1 | Standard output during single/dual reads; functions as I/O1 in quad-I/O mode; tri-stated when CS is high. |
| WP (I/O2) | Write Protect / Quad I/O Lane 2 | Configurable: hardware write-protection when QE=0 and SRP=01; otherwise serves as I/O2 in quad commands; internally pulled high. |
| HOLD (I/O3) | Hold / Quad I/O Lane 3 | Pauses ongoing SPI transfer without resetting state machine when QE=0; acts as I/O3 in quad mode; internally pulled high. |
| VCC | Power Supply | 2.5 V–3.6 V or 2.7 V–3.6 V operation; supports mixed-voltage system integration with 1.5 µA deep power-down current. |
| GND | Ground Reference | System ground connection; required for stable SPI signaling and internal voltage regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-I/O Read (0-4-4) | Enables execute-in-place (XiP) with zero-command overhead during continuous instruction fetch, reducing CPU wait states. |
| Serial Flash Discoverable Parameters (SFDP) | Provides standardized, vendor-agnostic register map for automatic host driver configuration of timing, density, and command sets. |
| Erase/Program Suspend & Resume | Allows interrupting long erase cycles (e.g., 200 ms 64 kB block erase) to service time-critical interrupts without data corruption. |
| Three 256-byte OTP Security Registers | Stores immutable keys, device IDs, or calibration data; prevents tampering while enabling secure boot chain verification. |
| User-Definable Memory Protection | Configurable lock bits allow protecting top or bottom memory regions (e.g., bootloader section) via WP pin or status register control. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Node Configuration |
|---|---|
Use Scenario: Storing firmware images and field-upgradeable application binaries in programmable logic controllers operating continuously at 85°C ambient. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing XiP execution path and secure firmware rollback via protected sectors. Use Value: 20-year data retention and 100,000-cycle endurance ensure reliable operation over 10+ year product lifecycles without refresh. |
Use Scenario: Holding device-specific credentials, sensor calibration tables, and OTA update staging area in battery-powered smart sensors. IC Role / Device Role / Timing Role: Low-power configuration store with deep power-down (1.5 µA) and fast wake-up (<10 µs) for intermittent connectivity. Use Value: OTP security registers prevent credential cloning; quad-I/O read minimizes active time during OTA verification, extending battery life. |
| Medical Diagnostic Instrument Bootloader | Automotive Infotainment Head Unit Code Storage |
Use Scenario: Hosting certified bootloader and safety-monitoring firmware in Class II medical devices requiring traceable, tamper-resistant memory. IC Role / Device Role / Timing Role: Secure boot source with write-protected top 64 kB region and SFDP-driven driver initialization. Use Value: JEDEC-standard manufacturer/device ID + OTP registers enable audit-ready firmware provenance and anti-counterfeit validation. |
Use Scenario: Storing graphics assets, UI code, and voice recognition models in automotive infotainment systems with thermal cycling (-40°C to 85°C). IC Role / Device Role / Timing Role: High-speed XiP memory delivering <50 ns instruction fetch latency via 108 MHz quad-I/O read mode. Use Value: Continuous read wrap (8/16/32/64-byte) eliminates inter-burst command overhead, improving UI responsiveness under real-time load. |
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 W25Q16JVSNIQ | 16 Mbit, 133 MHz max clock, 3.3 V only, no 2.5 V option; lacks OTP registers and SFDP v1.6 support. | Higher speed but less flexible voltage range; no built-in security registers for secure boot key storage. | Preferred where maximum read bandwidth is critical and security features are handled externally. |
| Micron MT25QL128ABA8ESF-0SIT | 128 Mbit density, 133 MHz, supports octal DTR mode; requires different command set and SFDP parsing logic. | Not drop-in compatible due to larger density and extended command set; needs host firmware adaptation. | Selected when future scalability to >16 Mbit is required and board layout allows SOIC-8 footprint reuse. |
Compared with Winbond W25Q16JVSNIQ and Micron MT25QL128ABA8ESF-0SIT, the AT25SF161-SSHD-T offers unique 2.5 V–3.6 V dual-voltage operation, integrated OTP security registers, and full SFDP v1.6 compliance - making it optimal for cost-sensitive, security-aware, and thermally demanding embedded designs where pin compatibility and minimal firmware changes are essential.
Availability
AT25SF161-SSHD-T is available at Aetrix Electronics and suitable for industrial PLCs, IoT edge nodes, medical diagnostic instruments, and automotive infotainment head units requiring stable component supply across multi-year production cycles.
Supply support for AT25SF161-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 delivering trusted microcontrollers, analog, power, and memory solutions for automotive, industrial, and enterprise applications.
The AT25SF161-SSHD-T belongs to Renesas' AT25SF family of SPI flash memories engineered specifically for robust, low-power, and secure boot and XiP use cases in harsh-environment embedded systems.
FAQ
What voltage ranges does the AT25SF161-SSHD-T support?
The AT25SF161-SSHD-T supports two configurable supply voltage ranges: 2.7 V to 3.6 V and 2.5 V to 3.6 V. This dual-voltage capability allows seamless integration into mixed-signal systems with 2.5 V or 3.3 V rails without level-shifting circuitry. The device maintains full functionality-including 108 MHz quad-I/O operation and 1.5 µA deep power-down-across both ranges, as verified in Renesas DS-AT25SF161B-188 Rev. H.
Does the AT25SF161-SSHD-T support execute-in-place (XiP) operation?
Yes, the AT25SF161-SSHD-T explicitly supports execute-in-place (XiP) through three hardware-optimized features: quad-I/O read (0-4-4 mode) eliminating opcode transmission, continuous read with 8/16/32/64-byte wrap, and 108 MHz maximum clock frequency. These reduce instruction fetch latency and eliminate external RAM buffering, enabling direct CPU execution from flash in applications like industrial HMIs and automotive displays.
How many one-time programmable (OTP) security registers does the AT25SF161-SSHD-T include?
The AT25SF161-SSHD-T includes three 256-byte one-time programmable (OTP) security registers, accessible via dedicated commands (42h program, 48h read, 44h erase). These registers are physically isolated from main memory and retain values indefinitely after programming, making them suitable for storing cryptographic keys, device identifiers, or calibration constants that must resist replay or modification attacks.
What package type is used by the AT25SF161-SSHD-T?
The AT25SF161-SSHD-T uses an 8-lead SOIC package with 0.150" narrow body (JEDEC MS-012), designated by the "SS" suffix in the part number. It features gull-wing leads, Pb/Halide-free finish, and RoHS compliance. Pinout matches industry-standard SPI flash footprints, enabling drop-in replacement for legacy SOIC-8 serial flash devices without PCB redesign.
Can the WP and HOLD pins be used simultaneously as I/O lines in quad mode?
No - in quad-SPI mode (QE bit = 1 in Status Register 2), the WP and HOLD pins function exclusively as I/O2 and I/O3, respectively, and cannot perform write-protection or hold functions concurrently. When QE = 0, they revert to WP and HOLD roles but quad-I/O commands are disabled. This functional duality is hardware-mapped and mutually exclusive per the AT25SF161-SSHD-T datasheet Section 2 and Table 1.
AT25SF161-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:
- Obsolete
- 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:
- 104 MHz
- Write Cycle Time - Word, Page:
- 5µs, 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25SF161-SSHD-T FAQ
1.How can I place an order for AT25SF161-SSHD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF161-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 AT25SF161-SSHD-T reliable?
The price and inventory of AT25SF161-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 AT25SF161-SSHD-T is usually 5 days.
3.What payment methods are accepted for AT25SF161-SSHD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF161-SSHD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF161-SSHD-T?
AT25SF161-SSHD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF161-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 AT25SF161-SSHD-T?
For technical support, including AT25SF161-SSHD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF161-SSHD-T requirements.
6.How does Aetrix verify that AT25SF161-SSHD-T is sourced from the original manufacturer or authorized distributors?
All AT25SF161-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 AT25SF161-SSHD-T meets industry standards.
7.What is the process for return or replacement of AT25SF161-SSHD-T?
All AT25SF161-SSHD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF161-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 AT25SF161-SSHD-T part is unused and in its original packaging.
Return procedure for AT25SF161-SSHD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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