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Renesas AT45DQ161-SHF-B
- Part No.:
- AT45DQ161-SHF-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45DQ161-SHF-B.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,089
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Product details
Overview
AT45DQ161-SHF-B from Renesas Electronics is a 16-Mbit serial Flash memory with SPI interface, Dual-I/O and Quad-I/O support, 85 MHz max clock frequency, 512/528-byte configurable page size, and two independent 512/528-byte SRAM buffers. It enables concurrent data reception during main memory reprogramming and supports RapidS™ high-speed operation in industrial temperature range.
For engineers reviewing the AT45DQ161-SHF-B datasheet, AT45DQ161-SHF-B pinout, AT45DQ161-SHF-B application, or AT45DQ161-SHF-B equivalent, key selection criteria include SPI mode 0/3 compatibility, ultra-low deep power-down current (3 µA typical), sector lockdown security, OTP security register, and dual-quad I/O read/write flexibility for embedded firmware storage and real-time data logging.
Technical Context
The AT45DQ161-SHF-B implements a sequential-access Flash architecture with two dedicated SRAM buffers enabling true background programming: one buffer accepts new data while the other transfers to main memory. Its RapidS™ mode reduces command overhead via optimized opcode sequences, supporting both legacy and high-frequency read commands (e.g., 0Bh/1Bh opcodes).
Memory organization is fixed at 4,096 pages × 512 or 528 bytes, with erase granularity spanning page (512/528 B), block (4 kB), sector (128 kB), and chip (16 Mbit). Sector protection and permanent lockdown are controlled via dedicated registers accessible through standard SPI commands (32h, 35h, 36h).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 16 Mbit (17,301,504 bits), organized as 4,096 pages of 512 or 528 bytes |
| Supply voltage | 2.3 V – 3.6 V single supply - enables direct interfacing with 2.5 V and 3.3 V logic systems without level shifting |
| Max clock frequency | 85 MHz for SPI, Dual-I/O, and Quad-I/O modes - supports sustained high-throughput data streaming |
| Page size | User-configurable 512 bytes (binary) or 528 bytes (DataFlash default) - determines address alignment and buffer-to-memory transfer efficiency |
| Power-down current | 3 µA typical deep power-down, 500 nA ultra-deep power-down - extends battery life in always-on sensor nodes |
| Endurance & retention | 100,000 program/erase cycles per page minimum; 20-year data retention - suitable for field-upgradable firmware storage |
| Security features | 128-byte OTP security register (64-byte factory UID + 64-byte user-programmable); sector lockdown capability - enables device authentication and immutable configuration storage |
Pinout & Package
AT45DQ161-SHF-B is packaged in an 8-pad Ultra-thin DFN (5 mm × 6 mm × 0.6 mm), RoHS-compliant, green packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command decoding; must be asserted before SCK edge to initiate valid transaction |
| SCK | Serial Clock | Input clock synchronizing all SPI data transfers; supports up to 85 MHz with tV ≤ 6 ns clock-to-output timing |
| MOSI | Master Out, Slave In | Primary serial input for commands, addresses, and write data; supports single/Dual/Quad-input buffer writes |
| MISO | Master In, Slave Out | Primary serial output for read data; supports single/Dual/Quad-output reads with selectable opcodes |
| WP | Write Protect | Hardware-enabled sector protection control; low = enables write/erase lock on protected sectors |
| RESET | Hardware Reset | Active-low asynchronous reset; returns device to known state and clears status register flags |
| HOLD | Hold Function | Pauses ongoing SPI transaction without deselecting CS; allows host to service higher-priority interrupts |
| VCC / GND | Power / Ground | Single 2.3–3.6 V supply; decoupling capacitor required within 10 mm of VCC pin per datasheet layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Dual- and Quad-I/O Read/Write | Enables 2× or 4× throughput vs. standard SPI by using MOSI/MISO bidirectionally - critical for real-time audio/video buffering |
| Two independent SRAM buffers | Each 512/528 bytes; allows full overlap of incoming data capture and background page programming - eliminates write latency stalls |
| Program/Erase Suspend/Resume | Permits interruption of long erase operations (e.g., sector erase) to service urgent reads - maintains system responsiveness |
| Configurable page size | Factory-set to 528 bytes or ordered as 512 bytes; affects addressing scheme and compatibility with legacy DataFlash drivers |
| Individual sector lockdown | Once enabled, makes any 128-kB sector permanently read-only - prevents accidental or malicious firmware corruption |
Applications
| Firmware Storage | Data Logging |
|---|---|
Use Scenario: Storing boot code, application firmware, and configuration parameters in microcontroller-based edge devices. IC Role / Device Role / Timing Role: Non-volatile program memory accessed via SPI during cold start and OTA updates. Use Value: 20-year data retention and 100K-cycle endurance ensure reliable field upgrades over product lifetime. | Use Scenario: Capturing timestamped sensor readings in battery-powered environmental monitors. IC Role / Device Role / Timing Role: High-speed circular buffer using Dual-I/O reads and interleaved SRAM buffers for continuous streaming. Use Value: 3 µA deep power-down current extends multi-year battery life; suspend/resume avoids data loss during interrupt handling. |
| Secure Boot Configuration | Industrial HMI Display Cache |
Use Scenario: Storing cryptographic keys and immutable boot policy in medical or industrial controllers. IC Role / Device Role / Timing Role: Secure storage element leveraging 128-byte OTP register and sector lockdown. Use Value: Factory-programmed 64-byte UID enables device identity binding; lockdown prevents runtime tampering with boot partition. | Use Scenario: Caching GUI assets (fonts, icons, bitmaps) for fast rendering on touch-enabled HMIs. IC Role / Device Role / Timing Role: High-bandwidth Quad-I/O read source feeding display controller DMA engine. Use Value: 85 MHz Quad-output read delivers >30 MB/s effective throughput - eliminates display frame stutter during asset loading. |
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, 1.65–3.6 V supply, Quad SPI only (no Dual-I/O), no SRAM buffers, no RapidS™ | Lacks concurrent buffer operation and RapidS™ acceleration; requires software-managed wear leveling | Select when lowest cost and standard QSPI interface suffice, and background programming is not required. |
| Macronix MX25L1633F | 16 Mbit, 2.7–3.6 V supply, supports Dual/Quad I/O but no SRAM buffers or RapidS™; 100K-cycle endurance | No interleaved buffer architecture; relies on host-controlled erase scheduling instead of suspend/resume | Choose for legacy SPI designs needing industrial temp support and basic dual-quad compatibility without advanced streaming features. |
Compared with W25Q16JW and MX25L1633F, the AT45DQ161-SHF-B uniquely integrates dual SRAM buffers and RapidS™ command optimization - enabling deterministic real-time data capture without host CPU intervention or complex driver layer management.
Availability
AT45DQ161-SHF-B is available at Aetrix Electronics and suitable for firmware storage, secure boot configuration, industrial HMI display caching, and battery-powered data logging requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT45DQ161-SHF-B 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 applications.
The AT45DQ161 belongs to Renesas' DataFlash® family, designed specifically for high-reliability, high-throughput sequential-access storage where concurrent read/write operations and hardware-accelerated command execution are essential.
FAQ
What is the default page size configuration for AT45DQ161-SHF-B?
The AT45DQ161-SHF-B is factory-configured to use 528-byte pages (standard DataFlash format), but it can be ordered pre-configured for 512-byte pages (binary alignment). Page size is set at manufacturing and cannot be changed in-circuit; the configuration determines address mapping and command compatibility.
Does AT45DQ161-SHF-B support true simultaneous read and write operations?
Yes. The AT45DQ161-SHF-B uses two independent SRAM buffers: while one buffer receives new data via SPI, the other can simultaneously transfer its contents to main memory. This enables true background programming without halting host data flow - a core capability distinguishing it from standard SPI Flash devices.
How does RapidS™ mode improve performance in AT45DQ161-SHF-B?
RapidS™ mode in the AT45DQ161-SHF-B reduces command overhead by eliminating dummy cycles and optimizing opcode sequences (e.g., 0Bh/1Bh read commands). It achieves up to 85 MHz effective throughput in Quad-I/O mode with tV ≤ 6 ns, enabling faster continuous array reads than legacy SPI Flash with identical clock rates.
Can the 128-byte OTP security register in AT45DQ161-SHF-B be reprogrammed?
No. The 128-byte OTP security register in the AT45DQ161-SHF-B contains 64 bytes factory-programmed with a unique device identifier and 64 bytes user-programmable - but once written, those user bytes cannot be erased or rewritten. This ensures cryptographic key immutability and device identity binding for secure boot applications.
What package type does AT45DQ161-SHF-B use, and is it RoHS-compliant?
AT45DQ161-SHF-B uses an 8-pad Ultra-thin DFN package measuring 5 mm × 6 mm × 0.6 mm. It is fully RoHS-compliant, Pb-free, and halide-free per JEDEC standards, meeting green packaging requirements for industrial and consumer electronics.
AT45DQ161-SHF-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 16Mbit
- Memory Organization:
- 528 Bytes x 4096 pages
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 85 MHz
- Write Cycle Time - Word, Page:
- 8µs, 6ms
- Access Time:
- -
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 105°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT45DQ161-SHF-B FAQ
1.How can I place an order for AT45DQ161-SHF-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DQ161-SHF-B 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 AT45DQ161-SHF-B reliable?
The price and inventory of AT45DQ161-SHF-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DQ161-SHF-B is usually 5 days.
3.What payment methods are accepted for AT45DQ161-SHF-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DQ161-SHF-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DQ161-SHF-B?
AT45DQ161-SHF-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DQ161-SHF-B 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 AT45DQ161-SHF-B?
For technical support, including AT45DQ161-SHF-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DQ161-SHF-B requirements.
6.How does Aetrix verify that AT45DQ161-SHF-B is sourced from the original manufacturer or authorized distributors?
All AT45DQ161-SHF-B 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 AT45DQ161-SHF-B meets industry standards.
7.What is the process for return or replacement of AT45DQ161-SHF-B?
All AT45DQ161-SHF-B units undergo pre-shipment inspection (PSI). If there is an issue with AT45DQ161-SHF-B, 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 AT45DQ161-SHF-B part is unused and in its original packaging.
Return procedure for AT45DQ161-SHF-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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