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Renesas AT45DQ161-SSHD-B
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- Part No.:
- AT45DQ161-SSHD-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT45DQ161-SSHD-B.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,263
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Product details
Overview
AT45DQ161-SSHD-B from Renesas Electronics is a 16-Mbit serial DataFlash memory IC with SPI interface, supporting Dual-I/O and Quad-I/O modes up to 85 MHz, 512/528-byte configurable page size, two independent 512/528-byte SRAM buffers, and ultra-low 500 nA deep power-down current. It enables high-throughput firmware storage and real-time data logging in space-constrained embedded systems.
For engineers reviewing the AT45DQ161-SSHD-B datasheet, AT45DQ161-SSHD-B pinout, AT45DQ161-SSHD-B application, or AT45DQ161-SSHD-B equivalent, key selection criteria include SPI mode 0/3 compatibility, RapidS™ operation support, dual/quad I/O read/write capability, buffer-to-memory page programming with built-in erase, and sector lockdown for secure firmware partitioning.
Technical Context
The AT45DQ161-SSHD-B implements a sequential-access Flash architecture with two dedicated SRAM buffers that operate independently of main memory - enabling simultaneous receive-and-reprogram operation. Its command set supports byte/page program, buffer write, buffer-to-main-memory transfer, and auto-page rewrite with suspend/resume capability.
It features hardware- and software-controlled sector protection, a 128-byte OTP security register (64 bytes factory-unique, 64 bytes user-programmable), and JEDEC-standard manufacturer/device ID read. The device complies with industrial temperature range and RoHS, and supports both legacy and high-frequency SPI opcodes including E8h, 0Bh, 1Bh, and 01h for optimized read latency and power efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 16 Mbit (2,097,152 bytes), organized as 4,096 pages × 512 or 528 bytes |
| Interface speed | 85 MHz max for SPI, Dual-I/O, and Quad-I/O modes - enables >30 MB/s effective throughput in quad-read mode |
| Page size | User-configurable: 512 bytes (binary) or 528 bytes (standard DataFlash); device shipped pre-configured per order code |
| SRAM buffers | Two independent 512/528-byte buffers - allow concurrent data buffering while main memory is being erased/programmed |
| Power-down current | 500 nA typical ultra-deep power-down - extends battery life in always-on sensor nodes and portable devices |
| Erase granularity | Page (512/528 B), block (4 kB), sector (128 kB), chip (16 Mbit) - supports fine-grained firmware updates and wear leveling |
| Data retention | 20 years at +85°C - suitable for long-lifecycle industrial control and medical equipment |
| Endurance | 100,000 program/erase cycles per page (50,000 cycles for extended temp option) |
Pinout & Package
AT45DQ161-SSHD-B uses an 8-pin SOIC package (150-mil narrow body, 1.27 mm pitch), RoHS-compliant and green-packaged. Pin functions are defined per JEDEC standard SOIC layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command decoding; must be asserted before clock edge to initiate valid transaction |
| SCK | Serial Clock | Input clock synchronizing all SPI transfers; supports modes 0 and 3 (CPOL=0/1, CPHA=0/1) |
| MOSI | Master Out Slave In | Serial data input for commands, addresses, and write data; supports single/dual/quad input modes |
| MISO | Master In Slave Out | Serial data output for read operations; supports single/dual/quad output modes with tV ≤ 6 ns |
| WP | Write Protect | Hardware-enabled sector protection override; low = enable protection, high = disable (when software protection active) |
| RESET | Reset Input | Active-low hardware reset; initiates internal state machine reset and clears status register flags |
| VCC | Power Supply | 2.3 V to 3.6 V single supply; supports direct connection to 2.5 V or 3.3 V system rails |
| GND | Ground | Reference return path for all digital and analog circuitry; requires low-impedance PCB connection |
Key Features
| Feature | Design Value |
|---|---|
| RapidS™ operation | Reduces instruction overhead and improves effective bandwidth via streamlined command sequences for continuous reads/writes |
| Dual-/Quad-I/O support | Enables 2× or 4× data rate over standard SPI without increasing clock frequency - critical for high-speed boot code loading |
| Buffer-to-memory page program with built-in erase | Single-command atomic operation erases target page and writes buffer contents - eliminates external erase-before-write logic |
| Program/erase suspend/resume | Allows interrupting long erase or program operations to service time-critical reads - essential for real-time data acquisition systems |
| Sector lockdown | Makes any memory sector permanently read-only after freeze command - prevents accidental or malicious firmware corruption |
| OTP Security Register | 128-byte one-time programmable area with 64-byte unique factory ID - enables secure device binding and cryptographic key storage |
Applications
| Firmware Storage | Industrial Data Logger |
|---|---|
Use Scenario: Storing boot code, FPGA configuration bitstreams, and application firmware in microcontroller-based edge nodes. IC Role / Device Role / Timing Role: Non-volatile storage medium accessed via SPI during cold start and runtime updates. Use Value: 85 MHz Quad-I/O read enables sub-100 ms boot time; sector lockdown protects bootloader region from overwrite. |
Use Scenario: Continuous timestamped sensor data capture in remote environmental monitoring stations powered by solar/battery. IC Role / Device Role / Timing Role: High-endurance sequential write buffer with background reprogramming enabled by dual-SRAM buffers. Use Value: 500 nA ultra-deep power-down extends multi-year battery life; page erase minimizes write latency during burst sampling. |
| Secure IoT Edge Device | Medical Diagnostic Equipment |
Use Scenario: Storing encrypted firmware images and device-specific credentials in HIPAA-compliant connected health devices. IC Role / Device Role / Timing Role: Secure non-volatile storage with hardware-enforced read-only lockdown of credential partitions. Use Value: 128-byte OTP register stores immutable device identity; sector lockdown prevents tampering with certified firmware sections. |
Use Scenario: Reliable storage of calibration tables, diagnostic logs, and regulatory audit trails in Class II medical imaging systems. IC Role / Device Role / Timing Role: Long-retention, high-reliability data archive with deterministic erase/program timing for FDA traceability. Use Value: 20-year data retention at +85°C ensures compliance with medical device lifecycle requirements; JEDEC ID enables automated BOM verification. |
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 SPI NOR Flash; no SRAM buffers; no RapidS™; 133 MHz max clock; no sector lockdown or OTP register | Lacks concurrent buffer operation and hardware security features; suited for simpler code storage without real-time streaming | Select when cost sensitivity outweighs need for interleaved write capability and firmware integrity enforcement |
| Macronix MX25L1633F | 16 Mbit SPI NOR Flash; no dual/quad I/O; no SRAM buffers; 104 MHz max clock; no OTP or sector lockdown | Supports only standard SPI reads/writes; no hardware-assisted security or high-speed I/O modes | Choose for legacy designs requiring pin-compatible replacement without feature upgrades |
Compared with W25Q16JW and MX25L1633F, the AT45DQ161-SSHD-B uniquely delivers concurrent buffer operation, RapidS™ acceleration, and hardware-enforced sector lockdown - making it the only option among the three capable of secure, real-time firmware streaming in resource-constrained embedded systems.
Availability
AT45DQ161-SSHD-B is available at Aetrix Electronics and suitable for firmware storage, industrial data logging, and secure IoT edge device applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT45DQ161-SSHD-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, infrastructure, and IoT markets.
The AT45DQ161 belongs to Renesas' DataFlash family, designed specifically for high-reliability, high-speed serial data storage in embedded systems where SPI bandwidth, power efficiency, and firmware security are critical.
FAQ
What is the default page size configuration for AT45DQ161-SSHD-B?
The AT45DQ161-SSHD-B is factory-configured with 528-byte pages (standard DataFlash format) unless ordered with alternate configuration. Page size is fixed at shipment and cannot be changed in-system; however, the device supports both 512-byte and 528-byte addressing modes depending on initial configuration. This setting determines command opcode behavior and buffer alignment for AT45DQ161-SSHD-B operations.
Does AT45DQ161-SSHD-B support true Quad-SPI (QSPI) protocol?
No, AT45DQ161-SSHD-B does not implement the JEDEC JESD216 QSPI standard. It supports Quad-output and Quad-input read/write using proprietary RapidS™ command sequences and dedicated opcodes (e.g., 6Bh for quad-read), but lacks QSPI-specific features like wrap-around addressing, dummy cycle configuration, or volatile/non-volatile configuration registers required for full QSPI compatibility.
How does the dual-SRAM buffer architecture improve write performance in AT45DQ161-SSHD-B?
The AT45DQ161-SSHD-B's two independent 512/528-byte SRAM buffers allow one buffer to accept incoming data via SPI while the other buffer simultaneously transfers its contents to main memory - eliminating write stalls. This interleaving enables sustained write throughput approaching 85 MHz × 4 bits/cycle, making AT45DQ161-SSHD-B ideal for continuous audio/video streaming or high-rate sensor logging.
Can AT45DQ161-SSHD-B be used as EEPROM emulation?
Yes, AT45DQ161-SSHD-B supports EEPROM emulation through software-managed page-level writes and wear leveling. Its buffer-to-memory page program with built-in erase, combined with sector protection and suspend/resume, allows reliable byte- or word-level updates. However, unlike true EEPROM, AT45DQ161-SSHD-B requires explicit erase before reprogramming and has finite endurance per page (100,000 cycles).
What is the function of the RESET pin on AT45DQ161-SSHD-B?
The RESET pin on AT45DQ161-SSHD-B provides hardware-initiated reset of the internal state machine and status register. When asserted low, it halts ongoing operations, clears BUSY and WPSEL flags, and returns the device to standby mode. It is electrically compatible with standard 3.3 V microcontroller GPIO outputs and supports both synchronous and asynchronous reset timing per datasheet Figure 58.
AT45DQ161-SSHD-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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:
- 2.5V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT45DQ161-SSHD-B FAQ
1.How can I place an order for AT45DQ161-SSHD-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DQ161-SSHD-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-SSHD-B reliable?
The price and inventory of AT45DQ161-SSHD-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-SSHD-B is usually 5 days.
3.What payment methods are accepted for AT45DQ161-SSHD-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DQ161-SSHD-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DQ161-SSHD-B?
AT45DQ161-SSHD-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DQ161-SSHD-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-SSHD-B?
For technical support, including AT45DQ161-SSHD-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DQ161-SSHD-B requirements.
6.How does Aetrix verify that AT45DQ161-SSHD-B is sourced from the original manufacturer or authorized distributors?
All AT45DQ161-SSHD-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-SSHD-B meets industry standards.
7.What is the process for return or replacement of AT45DQ161-SSHD-B?
All AT45DQ161-SSHD-B units undergo pre-shipment inspection (PSI). If there is an issue with AT45DQ161-SSHD-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-SSHD-B part is unused and in its original packaging.
Return procedure for AT45DQ161-SSHD-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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