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Renesas AT45DQ161-MHD2B-T
- Part No.:
- AT45DQ161-MHD2B-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT45DQ161-MHD2B-T.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,215
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Product details
Overview
AT45DQ161-MHD2B-T from Renesas Electronics is a 16-Mbit serial DataFlash memory 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 serves as nonvolatile storage for firmware boot code, configuration data, and voice/image assets in space-constrained embedded systems.
For engineers reviewing the AT45DQ161-MHD2B-T datasheet, AT45DQ161-MHD2B-T pinout, AT45DQ161-MHD2B-T application, or AT45DQ161-MHD2B-T equivalent, key selection criteria include SPI mode 0/3 compatibility, RapidS™ high-speed read/write timing, buffer-to-memory interleaving capability, sector lockdown security, and industrial-temperature operation with green packaging.
Technical Context
The AT45DQ161-MHD2B-T implements a dual-buffered architecture where two independent 512/528-byte SRAM buffers enable concurrent data reception and main memory reprogramming. Its RapidS™ mode reduces clock-to-output time to 6 ns maximum while maintaining full SPI mode 0 and mode 3 compliance.
It supports four distinct erase granularities-page (512/528 B), block (4 kB), sector (128 kB), and chip (16 Mbit)-with suspend/resume functionality during program/erase operations. Sector protection and permanent lockdown are enforced via dedicated registers and hardware WP pin control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 16 Mbit (2,097,152 bytes), organized as 4,096 pages of 512 or 528 bytes |
| Interface Speed | 85 MHz max for SPI, Dual-I/O, and Quad-I/O modes; enables >10 MB/s sustained read throughput |
| Page Size | User-configurable: 512 bytes (binary-aligned) or 528 bytes (DataFlash standard); factory pre-set per order |
| Power-Down Current | 500 nA typical ultra-deep power-down; allows battery-backed operation for years in sleep state |
| Endurance & Retention | 100,000 program/erase cycles per page; 20-year data retention at industrial temperature range |
| Operating Voltage | 2.3 V to 3.6 V single supply; compatible with 2.5 V and 3.3 V system rails without level shifting |
| Security Features | 128-byte OTP security register (64-byte factory UID + 64-byte user-programmable); per-sector lockdown |
Pinout & Package
AT45DQ161-MHD2B-T uses an 8-pad Ultra-thin DFN package (5 mm × 6 mm × 0.6 mm), RoHS-compliant and halide-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command/address/data transfer; controls device wake-up from deep power-down |
| SCK | Serial Clock | Input clock synchronizing all SPI operations; supports up to 85 MHz with 6 ns tV timing |
| MOSI | Master Out Slave In | Serial input for commands, addresses, and write data; supports single/dual/quad-input buffer writes |
| MISO | Master In Slave Out | Serial output for read data; supports single/dual/quad-output read modes |
| WP | Write Protect | Hardware-enabled sector protection lock; low = protection active, high = protection disabled |
| RESET | Reset Input | Active-low hardware reset; also used to exit ultra-deep power-down mode |
| VCC | Power Supply | 2.3–3.6 V primary supply; powers core logic, I/O, and SRAM buffers |
| GND | Ground | Reference return path for all internal circuits and I/O signals |
Key Features
| Feature | Design Value |
|---|---|
| Dual/Quad I/O Support | Enables 2× or 4× data bandwidth vs. standard SPI, accelerating firmware updates and media streaming |
| Interleaved Buffer Architecture | Two independent 512/528-byte SRAM buffers allow continuous data ingestion while main memory is being erased/programmed |
| Flexible Erase Granularity | Page (512/528 B), block (4 kB), sector (128 kB), and chip (16 Mbit) erases support fine-grained firmware patching and wear leveling |
| Hardware Sector Lockdown | Per-sector permanent read-only enforcement via OTP register; prevents accidental or malicious overwrite of critical boot sectors |
| RapidS™ High-Speed Timing | 6 ns max clock-to-output delay enables deterministic real-time read response in latency-sensitive applications |
Applications
| Industrial HMI Firmware Storage | Medical Device Configuration Archive |
|---|---|
Use Scenario: Storing GUI assets, calibration tables, and firmware images on a panel-mounted HMI with limited PCB area. IC Role / Device Role / Timing Role: Nonvolatile sequential-access memory providing fast, secure, and reliable boot code and asset loading via SPI. Use Value: 85 MHz Quad-I/O read speed reduces boot time by >40% vs. legacy SPI flash; sector lockdown protects bootloader integrity. | Use Scenario: Archiving patient-specific calibration parameters and device logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, long-retention data logger with tamper-resistant sector lockdown for regulatory compliance. Use Value: 100,000-cycle endurance and 20-year retention meet IEC 62304 Class C requirements; OTP UID enables traceability. |
| Smart Meter Bootloader Storage | Automotive Infotainment Voice Buffer |
Use Scenario: Hosting field-upgradable bootloader and cryptographic keys in utility smart meters operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-temperature serial flash with hardware write protection and deep power-down for battery backup. Use Value: 500 nA ultra-deep power-down extends 10-year battery life; WP pin and sector protection prevent unauthorized firmware modification. | Use Scenario: Temporary buffering and persistent storage of synthesized voice prompts in automotive head units. IC Role / Device Role / Timing Role: Dual-buffered DataFlash enabling simultaneous audio stream buffering and background flash programming. Use Value: Interleaved buffer operation eliminates audio stutter during over-the-air prompt updates; RapidS™ ensures prompt playback latency <10 µs. |
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, Quad SPI only (no Dual-I/O), no SRAM buffers, no RapidS™, 8 ms typical page program time | Lacks buffer interleaving and sub-10 ns timing; suitable for basic code storage but not real-time streaming | Choose when cost sensitivity outweighs performance and security needs; requires software-managed wear leveling |
| Macronix MX25L1633F | 16 Mbit, 2.7–3.6 V, supports Dual/Quad SPI, no SRAM buffers, no RapidS™, 50 µA standby current (vs. 25 µA) | No concurrent buffer operation; higher standby current limits battery life in always-on devices | Select for legacy SPI compatibility where buffer acceleration is unnecessary and voltage margin above 2.7 V is guaranteed |
Compared with W25Q16JW and MX25L1633F, the AT45DQ161-MHD2B-T uniquely delivers concurrent buffer operation, 6 ns timing, and hardware-enforced sector lockdown-critical for real-time embedded systems requiring deterministic performance and security-critical firmware integrity.
Availability
AT45DQ161-MHD2B-T is available at Aetrix Electronics and suitable for industrial HMI, medical diagnostics, smart metering, and automotive infotainment applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT45DQ161-MHD2B-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 IoT markets.
The AT45DQ161-MHD2B-T belongs to Renesas' DataFlash family, engineered specifically for high-reliability, high-speed sequential-access storage in resource-constrained embedded systems demanding security, low power, and industrial-grade robustness.
FAQ
What is the default page size configuration for AT45DQ161-MHD2B-T?
The AT45DQ161-MHD2B-T is factory pre-configured to use 528-byte pages by default-the standard DataFlash page size-but can be ordered with 512-byte (binary-aligned) page size. Page size is set at manufacturing and cannot be changed in-system; it determines addressing structure and command compatibility for read/write operations.
Does AT45DQ161-MHD2B-T support true Quad-SPI (QSPI) protocol with 4-line address/data multiplexing?
No. The AT45DQ161-MHD2B-T supports Quad-output and Quad-input *data* transfers (QO/QI), but uses standard SPI command/address transmission on MOSI/MISO. It does not implement QSPI's 4-line address phase or wrap-around addressing. Its Quad-I/O mode doubles bandwidth over standard SPI but retains separate command/address lanes.
How does the dual-SRAM buffer architecture improve write performance in AT45DQ161-MHD2B-T?
The AT45DQ161-MHD2B-T's two independent 512/528-byte SRAM buffers allow one buffer to accept incoming data via SPI while the other simultaneously programs its contents into main memory. This interleaving eliminates write stalls, enabling continuous data streaming-e.g., real-time sensor logging or audio capture-without CPU intervention or timing gaps.
Can AT45DQ161-MHD2B-T be used as EEPROM emulation with byte-level writes?
Yes-via software-managed E2PROM emulation. The AT45DQ161-MHD2B-T does not support true byte-alterability, but its small 512/528-byte page size, fast page erase (<10 ms), and buffer-to-memory transfer enable efficient emulation of byte-write behavior. System firmware allocates pages, manages wear leveling, and uses SRAM buffers to stage partial-page updates before committing.
What is the function of the RESET pin on AT45DQ161-MHD2B-T beyond hardware reset?
In addition to performing a hardware reset, the RESET pin on AT45DQ161-MHD2B-T is required to exit Ultra-Deep Power-Down mode. A falling edge followed by a specific timing sequence (≥20 µs low, then ≥20 µs high) wakes the device and restores full SPI functionality-enabling ultra-low-power sleep states with guaranteed recovery without external circuitry.
AT45DQ161-MHD2B-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- 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:
- 512 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-UDFN (5x6)
AT45DQ161-MHD2B-T FAQ
1.How can I place an order for AT45DQ161-MHD2B-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DQ161-MHD2B-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-MHD2B-T reliable?
The price and inventory of AT45DQ161-MHD2B-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-MHD2B-T is usually 5 days.
3.What payment methods are accepted for AT45DQ161-MHD2B-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DQ161-MHD2B-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DQ161-MHD2B-T?
AT45DQ161-MHD2B-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DQ161-MHD2B-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-MHD2B-T?
For technical support, including AT45DQ161-MHD2B-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DQ161-MHD2B-T requirements.
6.How does Aetrix verify that AT45DQ161-MHD2B-T is sourced from the original manufacturer or authorized distributors?
All AT45DQ161-MHD2B-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-MHD2B-T meets industry standards.
7.What is the process for return or replacement of AT45DQ161-MHD2B-T?
All AT45DQ161-MHD2B-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DQ161-MHD2B-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-MHD2B-T part is unused and in its original packaging.
Return procedure for AT45DQ161-MHD2B-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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