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Renesas AT25SF161-SHD-T
- Part No.:
- AT25SF161-SHD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25SF161-SHD-T.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,400
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Product details
Overview
AT25SF161-SHD-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- and quad-I/O operations (1-1-2, 1-1-4, 1-4-4, 0-4-4), 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 - deployed in industrial controllers, IoT edge nodes, and firmware-updatable consumer devices.
For engineers reviewing the AT25SF161-SHD-T datasheet, AT25SF161-SHD-T pinout, AT25SF161-SHD-T application, or AT25SF161-SHD-T equivalent, key selection criteria include quad-SPI timing compliance, OTP security register support, SFDP register accessibility, deep power-down (1.5 µA) capability, and flexible memory protection via WP pin and status register bits.
Technical Context
The AT25SF161-SHD-T implements a unified SPI interface supporting modes 0 and 3, with configurable I/O width (single/dual/quad) controlled by Status Register 2's Quad Enable (QE) bit. Its architecture enables continuous read mode (0-4-4) to eliminate opcode overhead during burst fetches, critical for XiP latency reduction.
Memory organization includes 4 kB sectors, 32 kB and 64 kB blocks, and full-chip erase - all with verified typical times (50 ms / 120 ms / 200 ms / 5.5 s). Security is enforced via three 256-byte OTP registers, SFDP parameter discovery, and non-volatile protection bits (SRP0/SRP1) that lock memory regions at array start or end.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 MB) - sufficient for MCU boot images, firmware binaries, and configuration data in space-constrained designs. |
| Max Clock Frequency | 108 MHz - enables high-throughput code fetch for real-time XiP execution without external RAM buffering. |
| Erase Granularity | 4 kB / 32 kB / 64 kB blocks + full chip - allows selective firmware updates while preserving calibration or user data partitions. |
| Program Time | 0.4 ms typical per page (1–256 bytes) - supports fast field firmware patching with minimal system downtime. |
| Power Consumption | 1.5 µA deep power-down current - extends battery life in always-on IoT sensors and wearable devices. |
| Data Retention | 20 years - ensures long-term reliability for industrial equipment with 10+ year service lifecycles. |
| Endurance | 100,000 program/erase cycles - accommodates frequent OTA updates in connected appliances and gateways. |
Pinout & Package
AT25SF161-SHD-T is packaged in an 8-lead SOIC (0.208" wide, EIAJ standard), with pin 1 marked by notch or dot. All pins support 3.3 V logic levels and are compatible with standard SPI controllers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition high-to-low to initiate commands and low-to-high to terminate - requires 10 kΩ pull-up to VCC for robust power-up sequencing. |
| SCK | Serial Clock | Input clock; rising edge latches SI data, falling edge clocks SO data - defines maximum 108 MHz operation and timing margins for hold/setup compliance. |
| SI (I/O0) | Serial Input / Quad I/O 0 | Primary command/address/data input; becomes bidirectional I/O0 in dual/quad modes - shares physical pin with I/O function, requiring mode-aware driver configuration. |
| SO (I/O1) | Serial Output / Quad I/O 1 | Primary data output; becomes bidirectional I/O1 in dual/quad modes - supports simultaneous 2-bit (dual) or 4-bit (quad) read bursts on falling SCK edges. |
| WP (I/O2) | Write Protect / Quad I/O 2 | Configurable: hardware write-protection when QE=0 and SRP=01; or I/O2 in quad mode when QE=1 - cannot serve both roles simultaneously. |
| HOLD (I/O3) | Hold / Quad I/O 3 | Pauses ongoing SPI transfer without resetting state; becomes I/O3 in quad mode - enables low-latency interrupt handling during active memory access. |
| VCC | Supply Voltage | 2.5 V–3.6 V operation - supports direct connection to common 3.3 V rails; no level-shifting required for most host MCUs. |
| GND | Ground Reference | System ground return path - must be low-impedance and co-located with VCC decoupling (0.1 µF ceramic) for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-I/O & XiP Support | Enables 0-4-4 continuous read mode, eliminating opcode transmission overhead and reducing instruction fetch latency by >30% vs. standard SPI reads. |
| Three 256-byte OTP Registers | Stores immutable device-specific keys, calibration constants, or secure boot hashes - prevents cloning and ensures firmware authenticity. |
| Serial Flash Discoverable Parameters (SFDP) | Provides standardized, vendor-agnostic access to memory geometry, timing, and command set - simplifies HAL abstraction layer development across flash vendors. |
| Erase/Program Suspend & Resume | Allows host to pause background erase/write operations to service time-critical interrupts, then resume without data loss or timeout failure. |
| User-Definable Memory Protection | Locks top or bottom address ranges (configurable via status register) - protects bootloader or factory calibration data from accidental overwrite during field updates. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Node Boot Memory |
|---|---|
Use Scenario: Storing and executing ladder logic firmware in programmable logic controllers with cold-start requirements under 500 ms. IC Role / Device Role / Timing Role: Primary boot memory providing XiP execution directly from flash, reducing BOM cost and PCB footprint versus external PSRAM + NOR combo. Use Value: 108 MHz quad-I/O read speed and 0-4-4 continuous mode cut boot time by 42% compared to legacy 40 MHz SPI flash, meeting deterministic startup SLAs. |
Use Scenario: Hosting secure firmware images and sensor calibration tables in battery-powered smart meters and environmental monitors. IC Role / Device Role / Timing Role: Trusted storage for signed firmware updates and encrypted configuration, leveraging OTP registers and hardware write protection. Use Value: 1.5 µA deep power-down current extends 10-year battery life; 20-year data retention ensures calibration validity over full product lifecycle. |
| Consumer Appliance UI Code Storage | Automotive Infotainment Bootloader |
Use Scenario: Storing GUI assets, localization strings, and application logic for smart home hubs and kitchen appliances. IC Role / Device Role / Timing Role: High-density serial flash supporting rapid UI asset streaming via quad-I/O burst reads to minimize perceived lag. Use Value: 4 kB sector erase enables granular UI language pack updates without erasing entire firmware image, reducing OTA bandwidth by 65%. |
Use Scenario: Storing A/B bootloader images and safety-critical boot code in ASIL-B compliant infotainment head units. IC Role / Device Role / Timing Role: Redundant boot memory with hardware-based memory protection to prevent unauthorized modification of boot sequence. Use Value: Non-volatile protection bits (SRP0/SRP1) and WP pin enable permanent lockdown of bootloader region, satisfying ISO 26262 functional safety requirements. |
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 | 16 Mbit density, 133 MHz max clock, 1.65–3.6 V supply, no OTP registers, SFDP v1.6 compliant. | Lacks dedicated OTP security registers and deep power-down current <2 µA; supports octal DTR mode not available on AT25SF161-SHD-T. | Choose W25Q16JW for higher clock speed and octal interface readiness; select AT25SF161-SHD-T when OTP-based secure boot or ultra-low deep power-down is mandatory. |
| Macronix MX25L1633F | 16 Mbit density, 104 MHz max clock, 2.7–3.6 V supply, includes 3 × 256-byte OTP, 2 µA deep power-down. | Lower max frequency (104 MHz vs. 108 MHz); identical OTP count and protection model but slightly higher deep power-down current. | Choose MX25L1633F for pin-compatible drop-in replacement where 4 MHz clock margin is acceptable; retain AT25SF161-SHD-T for maximum XiP throughput in latency-sensitive systems. |
Compared with W25Q16JW and MX25L1633F, the AT25SF161-SHD-T uniquely balances 108 MHz quad-I/O performance, 1.5 µA deep power-down, and three OTP registers - making it optimal for secure, battery-conscious XiP applications where timing margin and tamper resistance are design-critical.
Availability
AT25SF161-SHD-T is available at Aetrix Electronics and suitable for industrial automation, IoT edge deployment, and automotive infotainment systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT25SF161-SHD-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 enterprise applications.
The AT25SF161-SHD-T belongs to Renesas' AT25SF family of SPI flash memories engineered for reliable, low-power, secure boot and XiP execution in resource-constrained embedded systems.
FAQ
What voltage range does the AT25SF161-SHD-T support?
The AT25SF161-SHD-T supports a single supply voltage range of 2.5 V to 3.6 V, enabling direct integration with standard 3.3 V system rails without level shifters. This range is validated across the full industrial temperature range (−40 °C to +85 °C) and ensures stable operation during brown-out conditions down to 2.5 V.
Does the AT25SF161-SHD-T support execute-in-place (XiP) functionality?
Yes, the AT25SF161-SHD-T explicitly supports XiP through quad-I/O read modes (1-4-4 and 0-4-4), continuous read with wrap, and 108 MHz maximum clock frequency. These features reduce instruction fetch latency and eliminate the need for external RAM loading - confirmed in the Product Overview section of DS-AT25SF161B-188 Rev. H.
How many One-Time Programmable (OTP) security registers does the AT25SF161-SHD-T include?
The AT25SF161-SHD-T includes three independent 256-byte OTP security registers, accessible via dedicated commands (42h program, 48h read, 44h erase). These registers are used for storing cryptographic keys, device identifiers, or calibration data that must remain immutable after programming - a feature confirmed in the Features section of the datasheet.
What package type is used for the AT25SF161-SHD-T?
The AT25SF161-SHD-T uses an 8-lead, 0.208" wide EIAJ SOIC package (Ordering Information Section 15.2), with standard JEDEC pinout and lead finish. This package is RoHS-compliant, halogen-free, and optimized for reflow soldering in high-volume manufacturing environments.
Can the AT25SF161-SHD-T be used with standard SPI controllers?
Yes, the AT25SF161-SHD-T is fully SPI mode 0 and mode 3 compatible and interoperates with standard SPI peripherals found in ARM Cortex-M, RISC-V, and legacy MCU families. Its command set (e.g., 03h fast read, 02h page program) follows JEDEC JESD216 standards, ensuring broad driver compatibility without custom firmware.
AT25SF161-SHD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm 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-SHD-T FAQ
1.How can I place an order for AT25SF161-SHD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF161-SHD-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-SHD-T reliable?
The price and inventory of AT25SF161-SHD-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-SHD-T is usually 5 days.
3.What payment methods are accepted for AT25SF161-SHD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF161-SHD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF161-SHD-T?
AT25SF161-SHD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF161-SHD-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-SHD-T?
For technical support, including AT25SF161-SHD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF161-SHD-T requirements.
6.How does Aetrix verify that AT25SF161-SHD-T is sourced from the original manufacturer or authorized distributors?
All AT25SF161-SHD-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-SHD-T meets industry standards.
7.What is the process for return or replacement of AT25SF161-SHD-T?
All AT25SF161-SHD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF161-SHD-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-SHD-T part is unused and in its original packaging.
Return procedure for AT25SF161-SHD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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