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Renesas AT45DQ161-SHD-B
- Part No.:
- AT45DQ161-SHD-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45DQ161-SHD-B.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,595
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Product details
Overview
AT45DQ161-SHD-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 and main memory reprogramming in embedded voice, image, and firmware storage systems.
For engineers reviewing the AT45DQ161-SHD-B datasheet, AT45DQ161-SHD-B pinout, AT45DQ161-SHD-B application, or AT45DQ161-SHD-B equivalent, key selection criteria include SPI mode 0/3 compatibility, RapidS™ operation, ultra-deep power-down (500 nA), sector lockdown security, and JEDEC-standard Manufacturer/Device ID read capability.
Technical Context
The AT45DQ161-SHD-B implements a dual-buffered architecture where two independent 512/528-byte SRAM buffers operate asynchronously with the 4,096-page main Flash array. This enables true interleaved write operations-data can be loaded into one buffer while the other is programmed into Flash without CPU intervention.
It supports four distinct I/O modes: standard SPI (single-bit), Dual-I/O (two-bit), Quad-I/O (four-bit), and RapidS™ (high-speed single-bit with reduced overhead). Clock-to-output time is specified at ≤6 ns, and all read/write/erase commands are executed via standardized opcodes compliant with JEDEC JESD216 extensions.
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 |
| Supply voltage | 2.3 V to 3.6 V - enables direct interfacing with 2.5 V and 3.3 V logic systems without level shifting |
| Max operating frequency | 85 MHz for SPI, Dual-I/O, and Quad-I/O - supports high-throughput streaming in real-time audio/video buffering |
| Power-down current | 500 nA typical in Ultra-Deep Power-Down - extends battery life in always-on sensor nodes and portable devices |
| Endurance & retention | 100,000 program/erase cycles per page; 20-year data retention - suitable for field-updatable firmware and logging applications |
| Page size configuration | User-configurable 512-byte or 528-byte pages - 528-byte default includes 16-byte overhead for ECC/data tagging; factory pre-configurable |
| Security features | 128-byte OTP Security Register (64-byte factory UID + 64-byte user-programmable); sector lockdown for permanent read-only protection |
Pinout & Package
AT45DQ161-SHD-B is packaged in an 8-lead 150-mil narrow SOIC (JEDEC MS-012AA), with lead pitch of 1.27 mm and body width of 3.9 mm. Pin functions are electrically and physically identical across all SOIC variants of this device.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command/address/data transfer; supports multi-device daisy-chaining |
| SCK | Serial Clock | Input clock synchronizing all SPI transactions; supports up to 85 MHz with tV ≤ 6 ns output timing |
| MOSI | Master Out Slave In | Serial input for commands, addresses, and data; supports single/Dual/Quad-input buffer write modes |
| MISO | Master In Slave Out | Serial output for read data and status; supports single/Dual/Quad-output read with rapid turnaround |
| WP | Write Protect | Hardware-enabled sector protection control; low = enable protection, high = disable (with software override) |
| RESET | Hardware Reset | Asynchronous active-low reset; returns device to power-on state and clears internal status registers |
| VCC | Power Supply | 2.3–3.6 V supply; decoupling capacitor required per datasheet Section 19.2 |
| GND | Ground | Reference for all I/O and internal circuitry; separate analog/digital ground not required |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Buffer Interleaving | Enables continuous data streaming by allowing simultaneous buffer fill and Flash page programming - eliminates write stalls in real-time recording |
| RapidS™ Operation | Reduces command overhead and improves effective throughput in high-frequency SPI mode 0/3 - critical for latency-sensitive boot code loading |
| Flexible Erase Granularity | Page (512/528 B), Block (4 kB), Sector (128 kB), and Chip (16 Mbit) erase options - optimizes wear leveling and firmware update efficiency |
| Program/Erase Suspend | Allows interrupting long erase or program operations to service urgent reads - maintains system responsiveness during background updates |
| OTP Security Register | 128-byte one-time programmable register with 64-byte factory-assigned unique ID - enables secure device authentication and anti-cloning |
Applications
| Industrial Data Logger | Medical Imaging Device |
|---|---|
Use Scenario: Continuous acquisition of sensor telemetry (temperature, pressure, vibration) at 10 kHz with local timestamping and compression. IC Role / Device Role / Timing Role: Non-volatile storage buffer managing burst writes while background Flash programming occurs; RapidS™ ensures low-latency command execution. Use Value: Dual-buffer interleaving prevents data loss during 20 ms page program cycles; 500 nA ultra-deep power-down extends battery runtime to >5 years in sealed deployments. | Use Scenario: Storing DICOM-compliant ultrasound frames (1–4 MB/frame) before transmission to PACS server. IC Role / Device Role / Timing Role: High-bandwidth intermediate storage between imaging ASIC and Ethernet controller; Quad-I/O read delivers >30 MB/s sustained throughput. Use Value: 85 MHz Quad-output read mode reduces frame buffering latency by 65% vs. standard SPI; sector lockdown protects calibration data from accidental overwrite. |
| Firmware-Upgradeable IoT Gateway | Automotive ADAS Boot Memory |
Use Scenario: Over-the-air (OTA) firmware updates requiring atomic rollback, signature verification, and fail-safe recovery. IC Role / Device Role / Timing Role: Primary non-volatile storage for dual-bank firmware images and update metadata; supports secure boot via OTP UID binding. Use Value: Chip erase (16 Mbit) completes in <1 s; program/erase suspend allows immediate response to watchdog timeout during update - no firmware corruption risk. | Use Scenario: Storing boot loader, safety-critical microcode, and calibration tables for radar ECU with ASIL-B compliance requirements. IC Role / Device Role / Timing Role: Read-only boot memory mapped via XIP-capable controller; sector lockdown permanently protects safety-critical sectors. Use Value: 20-year data retention and 100,000-cycle endurance meet automotive lifetime requirements; JEDEC ID read enables automated BOM traceability during manufacturing test. |
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™, 100 µA standby current | Lacks concurrent buffer operation and ultra-low-power deep-sleep modes; no sector lockdown or OTP UID | Select when cost sensitivity outweighs concurrent write capability and advanced security needs |
| Macronix MX25L1633F | 16 Mbit, 2.3–3.6 V, Dual/Quad SPI, no SRAM buffers, no RapidS™, 25 µA standby, no OTP register | Missing dual-buffer architecture and hardware-based sector lockdown; lower max frequency (133 MHz but no RapidS timing advantage) | Choose for legacy SPI designs requiring simple drop-in replacement without buffer management complexity |
Compared with W25Q16JW and MX25L1633F, AT45DQ161-SHD-B uniquely delivers concurrent buffer operation, RapidS™ timing acceleration, and hardware-enforced sector lockdown - making it optimal for real-time streaming, secure OTA updates, and ASIL-B boot memory where data integrity and deterministic latency are mandatory.
Availability
AT45DQ161-SHD-B is available at Aetrix Electronics and suitable for industrial data loggers, medical imaging devices, firmware-upgradeable IoT gateways, and automotive ADAS boot memory requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT45DQ161-SHD-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 applications.
The AT45DQ161-SHD-B belongs to Renesas' DataFlash® family, designed specifically for high-reliability, high-speed sequential-access storage in resource-constrained embedded systems requiring concurrent operation and robust security.
FAQ
What is the default page size configuration for AT45DQ161-SHD-B?
The AT45DQ161-SHD-B ships with a default page size of 528 bytes, which includes 16 bytes of overhead for ECC or metadata tagging. The device can be factory-configured for 512-byte pages upon order - both configurations are supported in hardware and software, and the page size is fixed per unit after initial programming.
Does AT45DQ161-SHD-B support true Quad-I/O read and write operations?
Yes, AT45DQ161-SHD-B supports Quad-output Read (opcode 6Bh) and Quad-input Buffer Write (opcode 38h), enabling 4-bit-wide data transfers on the I/O pins. These modes require prior enabling via the Configuration Register (bit QE=1), and are fully compatible with JEDEC JESD216 standards for Quad SPI Flash interoperability.
How does the dual-buffer architecture of AT45DQ161-SHD-B improve system performance?
The AT45DQ161-SHD-B contains two independent 512/528-byte SRAM buffers that operate asynchronously with the main Flash array. This allows one buffer to be filled via SPI while the other is being written to Flash - eliminating CPU wait states and enabling uninterrupted data capture in streaming applications such as voice recording or sensor logging.
Can AT45DQ161-SHD-B be used in automotive applications requiring extended temperature range?
Yes, AT45DQ161-SHD-B complies with the full industrial temperature range (–40°C to +85°C) as standard. An extended temperature option (–40°C to +105°C) is available per ordering code suffix; verify the specific AT45DQ161-SHD-B variant's qualification documentation to confirm suitability for under-hood automotive use cases.
What security mechanisms does AT45DQ161-SHD-B provide beyond standard write protection?
AT45DQ161-SHD-B provides three layered security features: (1) individual sector protection via software/hardware WP pin control, (2) permanent sector lockdown (irreversible read-only lock), and (3) a 128-byte OTP Security Register containing a factory-programmed 64-byte unique identifier and 64-byte user-programmable space - all enforced at the silicon level without external dependencies.
AT45DQ161-SHD-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm 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-SHD-B FAQ
1.How can I place an order for AT45DQ161-SHD-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DQ161-SHD-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-SHD-B reliable?
The price and inventory of AT45DQ161-SHD-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-SHD-B is usually 5 days.
3.What payment methods are accepted for AT45DQ161-SHD-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DQ161-SHD-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DQ161-SHD-B?
AT45DQ161-SHD-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DQ161-SHD-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-SHD-B?
For technical support, including AT45DQ161-SHD-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DQ161-SHD-B requirements.
6.How does Aetrix verify that AT45DQ161-SHD-B is sourced from the original manufacturer or authorized distributors?
All AT45DQ161-SHD-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-SHD-B meets industry standards.
7.What is the process for return or replacement of AT45DQ161-SHD-B?
All AT45DQ161-SHD-B units undergo pre-shipment inspection (PSI). If there is an issue with AT45DQ161-SHD-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-SHD-B part is unused and in its original packaging.
Return procedure for AT45DQ161-SHD-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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