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Renesas AT45DQ161-SHD-T
- Part No.:
- AT45DQ161-SHD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45DQ161-SHD-T.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,606
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Product details
Overview
AT45DQ161-SHD-T from Renesas Electronics is a 16-Mbit serial DataFlash memory IC with SPI interface, Dual-I/O and Quad-I/O support, 512/528-byte configurable page size, and two independent 512/528-byte SRAM buffers. It operates from 2.3 V to 3.6 V, supports SPI modes 0 and 3, and delivers up to 85 MHz read/write throughput in RapidS™ mode - used for firmware storage and real-time data logging in embedded controllers.
For engineers reviewing the AT45DQ161-SHD-T datasheet, AT45DQ161-SHD-T pinout, AT45DQ161-SHD-T application, or AT45DQ161-SHD-T equivalent, key selection criteria include its ultra-deep power-down current (500 nA), dual-buffer interleaved write capability, sector lockdown security, and JEDEC-standard Manufacturer/Device ID read functionality.
Technical Context
The AT45DQ161-SHD-T implements a sequential-access Flash architecture with two dedicated SRAM buffers enabling concurrent buffer fill and main memory page reprogramming. Its RapidS™ mode uses optimized command sequences to achieve 85 MHz clock-to-output timing (tV ≤ 6 ns) in both Dual-I/O and Quad-I/O configurations.
Memory organization supports flexible erase granularity: page (512/528 B), block (4 kB), sector (128 kB), and full chip (16 Mbit). Program/erase suspend/resume and hardware/software sector protection allow deterministic real-time operation in safety-critical firmware update paths.
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/3.3 V microcontrollers without level shifters |
| Max clock frequency | 85 MHz for SPI, Dual-I/O, and Quad-I/O - supports high-throughput firmware loading and streaming data capture |
| Power-down current | 500 nA typical 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-upgradable industrial firmware |
| Page size option | User-configurable 512-byte or 528-byte pages - matches legacy DataFlash compatibility or optimizes for ECC overhead |
| Security features | 128-byte OTP security register (64 B factory UID + 64 B user-programmable); sector lockdown for permanent read-only enforcement |
Pinout & Package
AT45DQ161-SHD-T is packaged in an 8-lead 150-mil narrow SOIC (JEDEC MS-012AA), with exposed pad not present. Pin functions are electrically and mechanically defined per Renesas DS-AT45DQ161-8790 Rev. H, Page 8 (Table 1) and Page 8 (Figure 1).
| 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 transfers; supports up to 85 MHz in RapidS™ mode |
| 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 control; low = enable protection, high = disable (per configuration register) |
| RESET | Hardware Reset | Active-low asynchronous reset; returns device to power-on state and clears status register flags |
| HOLD | Pause Transfer | Active-low suspend signal; halts ongoing SPI transfer without losing internal state or requiring reinitialization |
| VCC / GND | Power / Ground | Single 2.3–3.6 V supply; decoupling capacitor required per datasheet Section 19.2 (DC/AC Operating Range) |
Key Features
| Feature | Design Value |
|---|---|
| Dual/Quad I/O Read & Write | Enables 2× or 4× bandwidth over standard SPI - reduces firmware load time by up to 75% vs. legacy SPI |
| Two independent SRAM buffers | Allows simultaneous buffer fill (MOSI) while main memory erases/programs - eliminates write latency gaps in continuous logging |
| Program/Erase Suspend/Resume | Permits immediate servicing of high-priority interrupts during long erase cycles (e.g., sector/flash erase) without data loss |
| Configurable page size (512/528 B) | Supports both legacy DataFlash compatibility (528 B) and optimized ECC layout (512 B) - selected at order time |
| 128-byte OTP Security Register | Provides immutable device identity (64 B factory UID) and secure key storage (64 B user space) - critical for secure boot validation |
| Ultra-deep power-down (500 nA) | Enables multi-year battery operation in IoT endpoints where wake-on-event dominates duty cycle |
Applications
| Firmware Storage | Data Logging |
|---|---|
|
Use Scenario: Storing bootloader, application firmware, and configuration tables in resource-constrained microcontrollers. IC Role / Device Role / Timing Role: Non-volatile code storage with fast random-access read via RapidS™ mode and page-aligned updates. Use Value: 85 MHz Quad-I/O read speed and 6 ns tV reduce firmware verification time by >60% vs. standard SPI flash. |
Use Scenario: Continuous timestamped sensor data capture in environmental monitoring nodes. IC Role / Device Role / Timing Role: High-reliability sequential write buffer with interleaved SRAM buffering to sustain 10+ kB/s sustained write rate. Use Value: Dual-buffer operation enables zero-gap writes - no dropped samples during 4 kB block erases. |
| Secure Boot Key Storage | Industrial HMI Configuration |
|
Use Scenario: Storing cryptographic keys and secure boot certificates in medical or industrial edge devices. IC Role / Device Role / Timing Role: Tamper-resistant OTP register with sector lockdown for permanent read-only enforcement. Use Value: 64-byte factory-programmed UID enables unique device attestation; lockdown prevents post-deployment key modification. |
Use Scenario: Retaining display layouts, language packs, and calibration parameters across power cycles in human-machine interfaces. IC Role / Device Role / Timing Role: Low-power, high-endurance non-volatile storage supporting frequent partial updates without wear leveling. Use Value: 100,000-cycle endurance and 20-year retention ensure HMI settings survive 10+ years of field operation. |
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 Dual/Quad-I/O or SRAM buffers; 133 MHz max clock; no RapidS™ or page-size configuration | Lacks concurrent buffer operation and programmable page size - unsuitable for real-time streaming or legacy DataFlash migration | Select when only basic SPI NOR functionality is needed and ultra-low deep-power-down current is not required. |
| Microchip SST26VF016B | 16 Mbit HyperBus-compatible flash; 104 MHz DDR interface; no SRAM buffers; no OTP security register or sector lockdown | Requires HyperBus controller; lacks on-chip security primitives and interleaved write capability | Choose for high-bandwidth parallel-like access in automotive infotainment, not for buffered sequential logging or secure key storage. |
Compared with W25Q16JW and SST26VF016B, AT45DQ161-SHD-T uniquely combines SRAM-buffered concurrent I/O, RapidS™ acceleration, and OTP-based device identity - making it irreplaceable for firmware-plus-logging co-storage in battery-powered edge devices.
Availability
AT45DQ161-SHD-T is available at Aetrix Electronics and suitable for firmware storage, real-time data logging, and secure boot key management requiring stable component supply and long-term industrial lifecycle support.
Supply support for AT45DQ161-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 AT45DQ161-SHD-T belongs to Renesas' DataFlash family, designed specifically for systems needing high-speed sequential access, concurrent buffer operation, and integrated security - targeting embedded firmware, voice/image storage, and secure IoT endpoints.
FAQ
What is the default page size configuration for AT45DQ161-SHD-T?
The AT45DQ161-SHD-T is ordered pre-configured to either 512-byte or 528-byte page size - the default shipped configuration depends on the specific order code. Per Renesas DS-AT45DQ161-8790 Rev. H Section 12, the 528-byte size aligns with legacy DataFlash compatibility, while 512-byte supports ECC-optimized layouts. AT45DQ161-SHD-T does not support runtime switching between sizes.
Does AT45DQ161-SHD-T support true random-access reads like standard NOR flash?
No. AT45DQ161-SHD-T is a sequential-access DataFlash device: reads require page-level addressing and are optimized for burst transfers, not byte-addressable random access. While Continuous Array Read commands (e.g., 0Bh, 03h) provide linear access across memory, AT45DQ161-SHD-T lacks the address bus and random-read latency of parallel NOR flash.
How does the dual-SRAM-buffer architecture improve write performance in AT45DQ161-SHD-T?
The two independent 512/528-byte SRAM buffers allow one buffer to accept incoming data via SPI while the other simultaneously programs into main Flash memory - eliminating write stalls. This interleaving enables sustained write throughput even during 4 kB block erases. AT45DQ161-SHD-T leverages this for gap-free data logging and rapid firmware patching.
Can AT45DQ161-SHD-T be used as EEPROM emulation?
Yes - AT45DQ161-SHD-T supports byte- and page-level programming (Section 7.7), and its SRAM buffers enable efficient read-modify-write sequences. Combined with sector protection and 100,000-cycle endurance, AT45DQ161-SHD-T is commonly used for parameter storage, calibration data, and configuration registers - though external wear-leveling logic is required for true EEPROM equivalence.
What is the purpose of the HOLD pin on AT45DQ161-SHD-T?
The HOLD pin provides hardware-level transaction suspension: asserting HOLD low pauses an ongoing SPI transfer (read or write) without resetting internal state or requiring command reissuance. This allows immediate servicing of time-critical MCU interrupts. When released, AT45DQ161-SHD-T resumes exactly where it left off - preserving address counters and buffer pointers.
AT45DQ161-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:
- 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-T FAQ
1.How can I place an order for AT45DQ161-SHD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DQ161-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 AT45DQ161-SHD-T reliable?
The price and inventory of AT45DQ161-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 AT45DQ161-SHD-T is usually 5 days.
3.What payment methods are accepted for AT45DQ161-SHD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DQ161-SHD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DQ161-SHD-T?
AT45DQ161-SHD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DQ161-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 AT45DQ161-SHD-T?
For technical support, including AT45DQ161-SHD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DQ161-SHD-T requirements.
6.How does Aetrix verify that AT45DQ161-SHD-T is sourced from the original manufacturer or authorized distributors?
All AT45DQ161-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 AT45DQ161-SHD-T meets industry standards.
7.What is the process for return or replacement of AT45DQ161-SHD-T?
All AT45DQ161-SHD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DQ161-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 AT45DQ161-SHD-T part is unused and in its original packaging.
Return procedure for AT45DQ161-SHD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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