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Renesas AT45DB161D-SU-2.5
- Part No.:
- AT45DB161D-SU-2.5
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45DB161D-SU-2.5.pdf
- Description:
- IC FLASH 16MBIT SPI 50MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,971
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Product details
Overview
AT45DB161D-SU-2.5 from Adesto Technologies is a 16-Mbit serial DataFlash memory IC with RapidS™ SPI-compatible interface, 512/528-byte page architecture, dual 512-/528-byte SRAM buffers, and single 2.5V–3.6V supply operation. It delivers up to 66MHz read speed, supports continuous array read for code shadowing, and enables simultaneous buffer write/main memory reprogram for streaming data logging in embedded systems.
For engineers reviewing the AT45DB161D-SU-2.5 datasheet, AT45DB161D-SU-2.5 pinout, AT45DB161D-SU-2.5 application, or AT45DB161D-SU-2.5 equivalent, key selection criteria include its 2.5V operation margin, sector-level hardware/software write protection, 100,000 program/erase cycles per page, 20-year data retention, and industrial temperature range (–40°C to +85°C).
Technical Context
The AT45DB161D-SU-2.5 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 at up to 66MHz, using MSB-first 8-bit opcodes followed by 21- or 22-bit address sequences depending on configured page size (512 vs. 528 bytes).
Memory organization comprises 4,096 pages of 512 or 528 bytes each, grouped into 16 sectors with hierarchical erase granularity: page (512B), block (4KB), sector (128KB), and chip (16Mbit). Erase and program operations are fully self-timed, with RDY/BUSY pin signaling active cycles and hardware WP pin providing independent sector-level lockout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2,097,152 bytes) organized as 4,096 × 512- or 528-byte pages |
| Supply Voltage | 2.5V–3.6V (guaranteed operation down to 2.5V; not 2.7V-only) |
| Max Clock Frequency | 66 MHz for Continuous Array Read (0BH/E8H), enabling real-time firmware streaming |
| Page Program Cycles | ≥100,000 cycles per page - supports long-life data logging in field-deployed devices |
| Data Retention | 20 years at 85°C - validated for industrial control and automotive infotainment storage |
| Power Consumption | 7 mA typical active read current; 25 µA standby; 15 µA deep power-down - ideal for battery-backed systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
AT45DB161D-SU-2.5 is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) with standard pinout and 1.27 mm pitch. The package is RoHS-compliant, halide-free, and Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; high-to-low transition initiates command sequence; low-to-high terminates operation and places SO in high-Z |
| SCK | Serial Clock | Input clock controlling data transfer timing; SI latched on rising edge, SO driven on falling edge |
| SI | Serial Input | Command, address, and data input line; MSB-first protocol; requires stable setup/hold relative to SCK |
| SO | Serial Output | Open-drain output for read data; requires external pull-up; tri-stated when CS is high |
| WP | Write Protect | Hardware sector lockout; low-active; overrides software protection; internally pulled high |
| RESET | Reset | Active-low hard reset; terminates ongoing operation and returns state machine to idle; recommended externally tied high if unused |
| RDY/BUSY | Ready/Busy Indicator | Open-drain status output; driven low during self-timed program/erase/page-to-buffer transfers; requires external pull-up |
| VCC / GND | Power Supply / Ground | Single 2.5V–3.6V supply; decoupling capacitor required near VCC pin for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers | Two independent 512-/528-byte buffers allow overlap of incoming data capture and Flash reprogramming - eliminates write latency in streaming applications |
| Flexible Page Size | User-configurable 512- or 528-byte pages; factory pre-configurable for 512-byte mode - simplifies EEPROM emulation and alignment-sensitive firmware updates |
| Multi-Level Erase | Page (512B), block (4KB), sector (128KB), and chip (16Mbit) erase options - enables granular wear leveling and fast partial firmware recovery |
| Hardware + Software Protection | Independent sector lockdown via WP pin plus programmable Sector Protection Register - prevents accidental overwrite of boot code or calibration data |
| Security Register | 128-byte dedicated register with 64-byte user-programmable space and unique 64-byte device ID - supports secure firmware binding and anti-cloning |
Applications
| Firmware Storage | Data Logging |
|---|---|
|
Use Scenario: Storing boot code, application firmware, and configuration tables in microcontroller-based edge nodes. IC Role / Device Role / Timing Role: Non-volatile code storage with rapid sequential read capability for XIP (execute-in-place) or shadow-load execution. Use Value: Continuous Array Read at 66MHz enables zero-wait-state code execution from Flash, reducing MCU RAM footprint and BOM cost. |
Use Scenario: Capturing sensor readings, event timestamps, and diagnostic logs in industrial PLCs or environmental monitors. IC Role / Device Role / Timing Role: High-endurance sequential data sink supporting concurrent buffer fill and background Flash programming. Use Value: Dual buffers permit uninterrupted data acquisition at up to 66MHz SPI rate while Flash pages are erased and rewritten - no dropped samples. |
| Secure Boot Configuration | Audio/voice Buffering |
|
Use Scenario: Storing cryptographic keys, signed bootloader images, and immutable device identity in medical or payment terminals. IC Role / Device Role / Timing Role: Tamper-resistant storage with hardware WP lock and sector lockdown for critical security assets. Use Value: 128-byte Security Register with unique 64-byte device ID enables hardware-rooted authentication and firmware attestation. |
Use Scenario: Buffering voice prompts, audio clips, or synthesized speech in VoIP phones, smart speakers, and IVR systems. IC Role / Device Role / Timing Role: Low-latency, continuous-read Flash memory delivering uncompressed PCM or ADPCM streams to DACs. Use Value: No-gap page boundary crossing during Continuous Array Read ensures glitch-free audio playback without inter-page delays. |
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-SU | Direct successor; identical pinout, voltage, and timing; adds enhanced ECC and improved endurance spec | Same use cases but preferred for new designs due to extended lifecycle support and updated qualification | Select AT45DB161E-SU for new projects; AT45DB161D-SU-2.5 remains viable for legacy repair or cost-sensitive volume production |
| W25Q16JVSSIQ | 16Mb Quad SPI NOR Flash; 3.3V only; no SRAM buffers; no built-in continuous read wrap-around | Requires host-side buffering and address management; better suited for random-access code storage than streaming | Choose W25Q16JVSSIQ only if Quad SPI bandwidth >66MHz is needed and dual-buffer streaming is unnecessary |
Compared with AT45DB161E-SU, the AT45DB161D-SU-2.5 lacks enhanced ECC and has slightly lower endurance rating, but retains full functional compatibility and identical 2.5V operation. Versus W25Q16JVSSIQ, it offers superior streaming efficiency and hardware-assisted EEPROM emulation but trades off random-access flexibility and higher-speed Quad SPI interface.
Availability
AT45DB161D-SU-2.5 is available at Aetrix Electronics and suitable for firmware storage, data logging, secure boot configuration, and audio buffering requiring stable component supply across industrial, medical, and connected-device programs.
Supply support for AT45DB161D-SU-2.5 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 (now part of Dialog Semiconductor, acquired by Renesas) specialized in low-power, high-reliability serial Flash and non-volatile memory solutions for resource-constrained embedded systems.
The AT45DB161D belongs to the DataFlash® family, designed specifically for sequential-access applications demanding low pin count, low voltage, and concurrent buffer/Flash operation - targeting code shadowing, streaming data capture, and secure configuration storage.
FAQ
What is the operating voltage range for the AT45DB161D-SU-2.5?
The AT45DB161D-SU-2.5 operates over a single supply range of 2.5V to 3.6V, with guaranteed functionality down to 2.5V. It does not require separate 2.7V minimum operation - the "2.5V–3.6V or 2.7V–3.6V" specification reflects dual-voltage binning options; the -SU-2.5 suffix confirms 2.5V minimum compliance. This allows direct integration with 2.5V logic families and battery-powered systems.
Does the AT45DB161D-SU-2.5 support true EEPROM emulation?
Yes, the AT45DB161D-SU-2.5 supports robust EEPROM emulation through its three-step read-modify-write operation, enabled by dual SRAM buffers and flexible page erase. Unlike standard NOR Flash, it allows byte- or bit-level updates without full-sector erasure - critical for storing frequently changing parameters like calibration data or counters in the AT45DB161D-SU-2.5.
How does the RDY/BUSY pin behave during internal operations?
The RDY/BUSY pin on the AT45DB161D-SU-2.5 is an open-drain output pulled low during all self-timed operations: page programming, any erase type (page/block/sector/chip), compare operations, and page-to-buffer transfers. It remains low until completion, allowing host polling or interrupt-driven synchronization. During busy states, main memory and one buffer are inaccessible, but the other buffer remains available for read/write.
Can the AT45DB161D-SU-2.5 be used in place of the AT45DB161E-SU?
The AT45DB161D-SU-2.5 is functionally compatible with the AT45DB161E-SU in pinout, command set, voltage, and timing, making it usable in existing AT45DB161E-SU designs. However, the AT45DB161E-SU adds enhanced ECC and improved endurance - so while AT45DB161D-SU-2.5 works as a drop-in replacement for legacy systems, new designs should specify AT45DB161E-SU per manufacturer guidance.
What is the purpose of the two SRAM buffers in the AT45DB161D-SU-2.5?
The AT45DB161D-SU-2.5 integrates two independent 512-/528-byte SRAM buffers to enable concurrent operations: one buffer can receive new data via SPI while the other is being written to Flash memory. This eliminates dead time between data capture and storage - essential for real-time applications like sensor logging or audio buffering where uninterrupted throughput is required in the AT45DB161D-SU-2.5.
AT45DB161D-SU-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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:
- 50 MHz
- Write Cycle Time - Word, Page:
- 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
AT45DB161D-SU-2.5 FAQ
1.How can I place an order for AT45DB161D-SU-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB161D-SU-2.5 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-SU-2.5 reliable?
The price and inventory of AT45DB161D-SU-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB161D-SU-2.5 is usually 5 days.
3.What payment methods are accepted for AT45DB161D-SU-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB161D-SU-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB161D-SU-2.5?
AT45DB161D-SU-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB161D-SU-2.5 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-SU-2.5?
For technical support, including AT45DB161D-SU-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB161D-SU-2.5 requirements.
6.How does Aetrix verify that AT45DB161D-SU-2.5 is sourced from the original manufacturer or authorized distributors?
All AT45DB161D-SU-2.5 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-SU-2.5 meets industry standards.
7.What is the process for return or replacement of AT45DB161D-SU-2.5?
All AT45DB161D-SU-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB161D-SU-2.5, 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-SU-2.5 part is unused and in its original packaging.
Return procedure for AT45DB161D-SU-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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