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Renesas AT45DB161D-TU
- Part No.:
- AT45DB161D-TU
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
AT45DB161D-TU.pdf
- Description:
- IC FLASH 16MBIT SPI 66MHZ 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,618
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Product details
Overview
AT45DB161D-TU from Adesto Technologies (now part of Dialog Semiconductor) is a 16-Mbit serial DataFlash memory IC with RapidS™ SPI-compatible interface, organized as 4,096 pages × 512/528 bytes, supporting 66 MHz max clock frequency, dual 512-/528-byte SRAM buffers, and flexible page/block/sector/chip erase. It enables code shadowing and EEPROM emulation in embedded microcontroller systems.
For engineers reviewing the AT45DB161D-TU datasheet, AT45DB161D-TU pinout, AT45DB161D-TU application, or AT45DB161D-TU equivalent, key selection criteria include its 2.5–3.6 V single-supply operation, hardware write-protect pin, RDY/BUSY open-drain status indicator, sector lockdown security, and industrial temperature range (−40°C to +85°C).
Technical Context
The AT45DB161D-TU implements a sequential-access Flash architecture with two independent SRAM buffers enabling concurrent data reception and Flash reprogramming. Its RapidS interface supports SPI Modes 0 and 3 up to 66 MHz, with continuous array read capability that wraps across page boundaries without delay.
Memory organization is hierarchical: 16 sectors (including split Sector 0), each containing multiple 4-KB blocks (8 pages), with programmable 512- or 528-byte page size factory-configurable. All program/erase operations are fully self-timed and require no external high-voltage supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 16 Mbit (17,301,504 bits), organized as 4,096 pages × 512 or 528 bytes |
| Interface | RapidS™ serial interface, SPI Mode 0/3 compatible, up to 66 MHz clock |
| Supply Voltage | 2.5–3.6 V or 2.7–3.6 V single supply - eliminates need for voltage translators |
| Active Read Current | 7 mA typical - enables low-power portable and battery-backed applications |
| Standby / Deep Power-Down | 25 µA / 15 µA typical - supports ultra-low-power sleep modes |
| Endurance & Retention | 100,000 program/erase cycles per page; 20-year data retention |
| Operating Temperature | −40°C to +85°C industrial grade - suitable for harsh environments |
Pinout & Package
AT45DB161D-TU is supplied in an 8-pin SOIC package (JEDEC MS-012AA). Pin functions are defined per JEDEC-compliant serial Flash interface with dedicated control, data, and status signals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates command sequence on falling edge, terminates on rising edge |
| SCK | Serial Clock | Input clock; commands/data latched on rising edge, output data shifted on falling edge |
| SI | Serial Input | Command, address, and data input; MSB-first, synchronous to SCK rising edge |
| SO | Serial Output | Data output; MSB-first, synchronous to SCK falling edge; tri-stated when CS high |
| WP | Write Protect | Hardware sector lock override; low = protected sectors immune to program/erase regardless of software state |
| RESET | Reset | Active-low hard reset; aborts ongoing operation and returns state machine to idle |
| RDY/BUSY | Ready/Busy Status | Open-drain output; pulled low during self-timed operations (program/erase/buffer transfer) |
| VCC / GND | Power Supply | Single 2.5–3.6 V supply and ground reference; no auxiliary voltages required |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers | Two independent 512-/528-byte buffers enable simultaneous data streaming and Flash reprogramming - critical for real-time firmware updates |
| Continuous Array Read | Legacy (E8H), High-Freq (0BH), and Low-Freq (03H) read modes support seamless code shadowing without address reload or page boundary stalls |
| Flexible Erase Granularity | Page (512 B), Block (4 KB), Sector (128 KB), or Chip (16 Mbit) erase - optimizes wear leveling and minimizes update latency |
| Hardware + Software Protection | WP pin + Sector Protection Register + Sector Lockdown + 128-byte Security Register (64-byte user space + 64-byte UID) - meets secure boot requirements |
| EEPROM Emulation Support | Self-contained read-modify-write cycle enables byte-level alterability without external logic - simplifies legacy EEPROM replacement |
Applications
| Industrial HMI Firmware Storage | Medical Device Configuration Data |
|---|---|
|
Use Scenario: Storing GUI assets, calibration tables, and localized language packs in panel-mounted HMIs with limited PCB space. IC Role / Device Role / Timing Role: Serial Flash memory providing nonvolatile storage for firmware images and runtime configuration, accessed via SPI from ARM Cortex-M host. Use Value: Dual-buffered continuous read enables zero-latency UI rendering; sector lockdown prevents accidental overwrite of safety-critical calibration data. |
Use Scenario: Secure storage of patient-specific therapy parameters and device audit logs in Class II medical instruments. IC Role / Device Role / Timing Role: Trusted nonvolatile memory with hardware write protection and unique device ID, interfaced to a secure MCU over SPI. Use Value: 128-byte security register stores encrypted keys; WP pin ensures tamper-resistant parameter persistence during power loss or reset events. |
| IoT Edge Node Boot Code | Automotive Infotainment Asset Cache |
|
Use Scenario: Hosting bootloader and signed firmware images in battery-powered LPWAN sensors requiring field-upgradable code. IC Role / Device Role / Timing Role: Primary boot memory holding verified application code, loaded into RAM at startup via SPI xfer. Use Value: 66 MHz RapidS interface reduces boot time; 100K endurance supports frequent OTA updates; deep power-down mode extends battery life. |
Use Scenario: Caching map tiles, voice prompts, and UI skins in automotive head units where thermal and EMI constraints limit parallel Flash use. IC Role / Device Role / Timing Role: High-speed serial Flash supplementing main NOR Flash, accessed by application processor for burst reads. Use Value: Continuous array read avoids interrupt latency during audio playback; industrial temp rating ensures reliability under dashboard heat exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT45DB161E-TU | Direct successor; identical pinout, same 16-Mbit density, but improved ECC, faster tEP/tP, and extended lifecycle support | Recommended for new designs; supports longer product lifecycles and higher reliability in mission-critical systems | Select AT45DB161E-TU for all new designs - AT45DB161D-TU is Not Recommended for New Designs per datasheet |
| W25Q16JVSSIQ | 16-Mbit Quad SPI Flash; supports QPI/DTR modes, 133 MHz max clock, but lacks dual buffers and continuous array read optimization | Better suited for high-throughput data logging; less optimal for code shadowing due to lack of seamless page-wrap read | Choose W25Q16JVSSIQ only if quad I/O bandwidth or DTR timing is required; verify bufferless read behavior in target firmware |
Compared with AT45DB161D-TU, the AT45DB161E-TU offers enhanced reliability and active design support, while W25Q16JVSSIQ trades sequential-read optimization for higher raw throughput - selection depends on whether deterministic low-latency code execution or peak data rate is prioritized.
Availability
AT45DB161D-TU is available at Aetrix Electronics and suitable for industrial HMI firmware storage, medical device configuration data, IoT edge node boot code, and automotive infotainment asset caching requiring stable component supply and long-term sourcing continuity.
Supply support for AT45DB161D-TU 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
Adesto Technologies, acquired by Dialog Semiconductor in 2020, specialized in low-power, high-reliability nonvolatile memory and analog ICs for industrial and IoT applications.
The AT45DB161D-TU belongs to the DataFlash® family, designed specifically for embedded systems needing SPI-based Flash with integrated SRAM buffers, continuous read, and robust data integrity features - targeting code shadowing and secure configuration storage.
FAQ
What is the maximum SPI clock frequency supported by the AT45DB161D-TU?
The AT45DB161D-TU supports up to 66 MHz for Continuous Array Read (0BH and E8H commands) and Main Memory Page Read (D2H), per the fCAR1 specification. For lower-frequency operation, the 03H command supports up to 33 MHz without dummy bytes. All timing values are specified in the official datasheet revision 3500O–DFLASH–11/2012, and actual achievable speed depends on PCB layout, drive strength, and VCC stability.
Does the AT45DB161D-TU require a high-voltage programming supply?
No, the AT45DB161D-TU operates entirely from a single 2.5–3.6 V supply for both read and program/erase operations. It uses internal charge pumps to generate necessary high voltages, eliminating external VPP pins or voltage translators. This simplifies power design and improves system reliability - a core advantage of the DataFlash architecture over conventional parallel or high-voltage serial Flash devices.
How does the dual-buffer architecture of the AT45DB161D-TU improve system performance?
The AT45DB161D-TU's two independent 512-/528-byte SRAM buffers allow simultaneous data reception via SI while reprogramming Flash pages - enabling uninterrupted data streaming during firmware updates or logging. This eliminates CPU polling delays and permits background Flash writes without stalling host operations, directly improving real-time responsiveness in microcontroller-based systems using the AT45DB161D-TU.
Can the AT45DB161D-TU emulate EEPROM functionality?
Yes, the AT45DB161D-TU supports EEPROM emulation through its built-in three-step read-modify-write operation, allowing byte- or bit-level alterations without external logic. The device handles address translation and wear leveling internally, making it suitable for replacing traditional EEPROM in applications like parameter storage, event logging, and configuration backup - all while leveraging the higher density and lower cost of Flash technology.
Is the AT45DB161D-TU still recommended for new designs?
No - the official datasheet (3500O–DFLASH–11/2012) explicitly states "Not Recommended for New Designs" and directs users to the AT45DB161E-TU as the functional and pin-compatible successor. While AT45DB161D-TU remains available for legacy support, new designs should adopt AT45DB161E-TU for guaranteed long-term supply, improved endurance, and updated qualification standards.
AT45DB161D-TU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- 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
- Clock Frequency:
- 66 MHz
- Write Cycle Time - Word, Page:
- 6ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP
AT45DB161D-TU FAQ
1.How can I place an order for AT45DB161D-TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB161D-TU 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 AT45DB161D-TU reliable?
The price and inventory of AT45DB161D-TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB161D-TU is usually 5 days.
3.What payment methods are accepted for AT45DB161D-TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB161D-TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB161D-TU?
AT45DB161D-TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB161D-TU 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 AT45DB161D-TU?
For technical support, including AT45DB161D-TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB161D-TU requirements.
6.How does Aetrix verify that AT45DB161D-TU is sourced from the original manufacturer or authorized distributors?
All AT45DB161D-TU 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 AT45DB161D-TU meets industry standards.
7.What is the process for return or replacement of AT45DB161D-TU?
All AT45DB161D-TU units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB161D-TU, 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 AT45DB161D-TU part is unused and in its original packaging.
Return procedure for AT45DB161D-TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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