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Renesas AT45DB161E-MHD2B-T
- Part No.:
- AT45DB161E-MHD2B-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT45DB161E-MHD2B-T.pdf
- Description:
- IC FLASH 16MBIT SPI 85MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,727
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Product details
Overview
AT45DB161E-MHD2B-T from Renesas Electronics is a 16-Mbit serial DataFlash memory with 512/528-byte page architecture, SPI-compatible interface (modes 0 and 3), RapidS™ high-speed operation up to 85 MHz, and dual 512/528-byte SRAM buffers enabling concurrent read/write. It operates from a single 2.3–3.6 V supply and targets embedded firmware storage, voice/image buffering, and E²PROM emulation in space-constrained industrial controllers.
For engineers reviewing the AT45DB161E-MHD2B-T datasheet, AT45DB161E-MHD2B-T pinout, AT45DB161E-MHD2B-T application, or AT45DB161E-MHD2B-T equivalent, key selection criteria include its dual-buffer interleaving capability, ultra-deep power-down current (400 nA), factory-programmable 64-byte unique ID, sector lockdown security, and support for continuous array read across legacy and high-frequency opcodes (E8h, 0Bh, 1Bh).
Technical Context
The AT45DB161E-MHD2B-T implements a sequential-access Flash architecture with two independent SRAM buffers that enable true background programming: while one buffer receives incoming data via SPI, the other can simultaneously program a full page (512/528 bytes) into main memory. Its RapidS™ mode reduces clock-to-output time to 6 ns and supports up to 85 MHz operation, distinguishing it from standard SPI Flash.
It features hierarchical erase granularity-page (512/528 B), block (4 kB), sector (128 kB), and chip (16 Mbit)-with suspend/resume functionality for both program and erase operations. Sector protection is implemented via hardware WP pin control and software-configurable registers, including permanent lockdown of any sector to read-only state using the 128-byte OTP Security Register.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 16 Mbit (2,097,152 bytes) main Flash + 512 kbit extra capacity, organized as 4,096 pages of 512 or 528 bytes |
| Interface | SPI-compatible, supports modes 0 and 3; RapidS™ mode enables 85 MHz max clock and 6 ns tV |
| Supply Voltage | Single 2.3–3.6 V or 2.5–3.6 V rail; no high-voltage programming required |
| Power Consumption | 400 nA ultra-deep power-down (typical); 25 µA standby (typical); 7 mA active read @ 15 MHz (typical) |
| Data Retention & Endurance | 20 years retention; ≥100,000 program/erase cycles per page |
| Security Features | 128-byte OTP Security Register (64-byte factory UID + 64-byte user programmable); sector lockdown; individual sector protection |
| Operating Temperature | Industrial range: –40°C to +85°C |
Pinout & Package
AT45DB161E-MHD2B-T is packaged in an 8-pad Ultra-thin DFN (5 × 6 × 0.6 mm) with exposed thermal pad (non-connected or GND). Pinout conforms to standard SPI serial interface with dual-buffer control logic.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; places SO in high-impedance when deasserted; initiates command decoding on rising edge |
| SCK | Serial Clock | Input timing reference for all SPI transfers; supports up to 85 MHz in RapidS™ mode |
| SI | Serial Input | Command/address/data input path; latched on SCK rising edge in mode 0, falling edge in mode 3 |
| SO | Serial Output | Data/command response output; tri-stated when CS is high; 6 ns max tV in RapidS™ |
| WP | Write Protect | Hardware sector protection enable; low = protection active; overrides software protection commands |
| RESET | Hardware Reset | Active-low asynchronous reset; returns device to power-on state without requiring VCC cycle |
| VCC | Power Supply | 2.3–3.6 V single supply; powers core, I/O, and charge pump for erase/program |
| GND | Ground | Reference for all signals and internal circuitry; thermal pad may be connected to GND for improved thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Dual Independent SRAM Buffers | Two 512/528-byte buffers enable simultaneous data reception and main memory reprogramming - critical for real-time streaming applications |
| RapidS™ High-Speed Interface | 85 MHz max clock rate and 6 ns clock-to-output eliminates bottleneck in high-throughput firmware updates and audio playback |
| User-Configurable Page Size | Factory-set 512-byte or default 528-byte pages allow optimization between density efficiency and ECC overhead in system design |
| Program/Erase Suspend & Resume | Allows interrupting long erase (sector/chip) or program operations to service urgent reads or writes - essential for deterministic real-time systems |
| Permanent Sector Lockdown | Any memory sector can be made permanently read-only via OTP register, preventing accidental or malicious overwrite of boot code or calibration data |
| Unique Factory-Programmed ID | 64-byte immutable identifier enables secure device authentication, traceability, and anti-cloning in production and field deployment |
Applications
| Firmware Storage | Voice/Image Buffering |
|---|---|
Use Scenario: Storing boot loader, application firmware, and configuration parameters in microcontroller-based industrial PLCs with infrequent field updates. IC Role / Device Role / Timing Role: Nonvolatile firmware repository accessed via SPI during cold start and OTA update sequences; leverages page erase and buffer-to-memory programming for atomic updates. Use Value: Enables safe in-system reprogramming without external HV supply; 100K-cycle endurance ensures >10-year field life with quarterly updates. |
Use Scenario: Capturing and streaming compressed voice clips or sensor image frames in battery-powered IoT edge nodes. IC Role / Device Role / Timing Role: High-bandwidth sequential buffer supporting continuous write via RapidS™ while background programming maintains uninterrupted capture. Use Value: Dual-buffer interleaving sustains >68 Mbps effective write throughput (85 MHz × 8-bit) without data loss during flash reprogramming. |
| E²PROM Emulation | Secure Boot Code Storage |
Use Scenario: Replacing discrete EEPROM in medical diagnostic devices requiring byte-level parameter updates (e.g., calibration offsets, usage counters). IC Role / Device Role / Timing Role: Implements self-contained read-modify-write using SRAM buffers to emulate byte-alterable storage without external logic. Use Value: Eliminates need for external EEPROM; 20-year data retention and 100K-cycle endurance meet IEC 62304 Class C requirements. |
Use Scenario: Storing immutable bootloader and cryptographic keys in automotive telematics modules subject to UNECE R155 compliance. IC Role / Device Role / Timing Role: Sector lockdown + OTP Security Register provides hardware-enforced read-only protection for first-stage boot code. Use Value: Prevents runtime corruption or unauthorized modification; factory-programmed UID enables secure key binding and device attestation. |
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 Quad SPI (QSPI) interface; no dual SRAM buffers; no RapidS™; 133 MHz QSPI clock; no sector lockdown | Better suited for high-speed code XIP from cache; lacks background write capability and hardware sector lockdown | Select when system requires QSPI bus bandwidth >100 MB/s and does not require concurrent write/read or permanent sector protection |
| Macronix MX25L1633F | 16 Mbit standard SPI; no dual buffers; no RapidS™; 104 MHz max clock; supports Deep Power-Down but no Ultra-Deep mode (400 nA) | Lower cost alternative for basic firmware storage where concurrent streaming and ultra-low sleep current are not required | Select for cost-sensitive consumer electronics where 5 µA deep power-down suffices and background programming is unnecessary |
Compared with W25Q16JW and MX25L1633F, the AT45DB161E-MHD2B-T uniquely delivers dual-buffer interleaving for zero-latency streaming, 400 nA ultra-deep power-down for multi-year battery life, and hardware-enforced sector lockdown - making it optimal for safety-critical, low-power, and real-time embedded systems.
Availability
AT45DB161E-MHD2B-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, battery-powered voice recorder buffering, and secure bootloader storage requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT45DB161E-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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, with strong IP in Flash, MCUs, and analog mixed-signal technologies.
The AT45DB161E-MHD2B-T belongs to Renesas' DataFlash family - designed specifically for systems needing high-reliability, low-pin-count, low-voltage serial Flash with advanced buffering, security, and power management for embedded firmware and data logging.
FAQ
What is the page size configuration of AT45DB161E-MHD2B-T?
The AT45DB161E-MHD2B-T supports user-configurable page sizes of either 512 bytes or 528 bytes. The default is 528 bytes, but it can be factory pre-configured for 512-byte pages to optimize density or simplify ECC implementation. Configuration is fixed per unit and cannot be changed in-circuit.
Does AT45DB161E-MHD2B-T support true concurrent read and write operations?
Yes - the AT45DB161E-MHD2B-T uses two fully independent 512/528-byte SRAM buffers to enable true concurrency: one buffer can receive new data via SPI while the other programs a full page into main memory. This eliminates write latency bottlenecks in continuous streaming applications.
What security mechanisms does AT45DB161E-MHD2B-T provide for firmware protection?
The AT45DB161E-MHD2B-T provides hardware sector lockdown (permanently read-only), individual sector protection (software/hardware controlled), and a 128-byte OTP Security Register containing 64 bytes of factory-programmed unique ID and 64 bytes user-programmable for keys or certificates - all enforced at silicon level.
How does RapidS™ mode improve performance over standard SPI in AT45DB161E-MHD2B-T?
RapidS™ mode in the AT45DB161E-MHD2B-T enables up to 85 MHz operation and reduces clock-to-output time (tV) to 6 ns maximum - more than 2× faster than typical SPI Flash. It also supports high-frequency opcodes (0Bh, 1Bh) for continuous array read without command overhead penalties.
What is the lowest power state supported by AT45DB161E-MHD2B-T, and what is its typical current draw?
The AT45DB161E-MHD2B-T supports Ultra-Deep Power-Down mode with a typical current draw of 400 nA - ideal for battery-backed systems requiring multi-year shelf life or decades of operational standby. Entry and exit are controlled via dedicated command sequence (09h/01h).
AT45DB161E-MHD2B-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- 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
- Clock Frequency:
- 85 MHz
- Write Cycle Time - Word, Page:
- 8µs, 4ms
- 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)
AT45DB161E-MHD2B-T FAQ
1.How can I place an order for AT45DB161E-MHD2B-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB161E-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 AT45DB161E-MHD2B-T reliable?
The price and inventory of AT45DB161E-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 AT45DB161E-MHD2B-T is usually 5 days.
3.What payment methods are accepted for AT45DB161E-MHD2B-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB161E-MHD2B-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB161E-MHD2B-T?
AT45DB161E-MHD2B-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB161E-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 AT45DB161E-MHD2B-T?
For technical support, including AT45DB161E-MHD2B-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB161E-MHD2B-T requirements.
6.How does Aetrix verify that AT45DB161E-MHD2B-T is sourced from the original manufacturer or authorized distributors?
All AT45DB161E-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 AT45DB161E-MHD2B-T meets industry standards.
7.What is the process for return or replacement of AT45DB161E-MHD2B-T?
All AT45DB161E-MHD2B-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB161E-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 AT45DB161E-MHD2B-T part is unused and in its original packaging.
Return procedure for AT45DB161E-MHD2B-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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