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Renesas AT45DB161E-MHD-Y
- Part No.:
- AT45DB161E-MHD-Y
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT45DB161E-MHD-Y.pdf
- Description:
- IC FLASH 16MBIT SPI 85MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,151
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Product details
Overview
AT45DB161E-MHD-Y from Renesas Electronics is a 16-Mbit serial DataFlash memory with 512-kbit extra capacity, supporting SPI modes 0 and 3 at up to 85 MHz, featuring dual 512/528-byte SRAM buffers, 100,000 program/erase cycles per page, and ultra-deep power-down current of 400 nA (typical). It serves as nonvolatile storage for firmware, voice, and image data in space-constrained embedded systems.
For engineers reviewing the AT45DB161E-MHD-Y datasheet, AT45DB161E-MHD-Y pinout, AT45DB161E-MHD-Y application, or AT45DB161E-MHD-Y equivalent, key selection criteria include SPI interface compatibility, buffer-assisted continuous write capability, sector lockdown security, low-power deep-sleep modes, and industrial temperature operation (–40°C to +85°C).
Technical Context
The AT45DB161E-MHD-Y implements a sequential-access Flash architecture with two independent SRAM buffers enabling concurrent read-into-buffer and program-from-buffer operations. Its RapidS™ mode supports high-frequency continuous array reads using opcodes 0Bh and 1Bh, achieving 6 ns clock-to-output timing.
Memory organization comprises 4,096 pages of either 512 or 528 bytes (factory-configurable), with flexible erase granularity: page (512/528 B), block (4 kB), sector (128 kB), or full chip (16 Mbits). Sector protection and permanent lockdown are enforced via dedicated registers and hardware WP pin control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory density | 16 Mbits main memory + 512 kbits extra capacity - supports firmware images and audio buffers in compact designs |
| Interface | SPI-compatible, modes 0 and 3 - interoperable with standard microcontroller SPI peripherals without protocol translation |
| Max clock frequency | 85 MHz - enables high-throughput streaming in RapidS™ mode for real-time data logging |
| Page size | Factory-configurable 512 or 528 bytes - balances alignment efficiency and overhead for E2PROM emulation |
| Endurance | 100,000 program/erase cycles per page - suitable for frequent field-updatable applications like metering or IoT edge nodes |
| Data retention | 20 years - ensures long-term reliability in unattended industrial deployments |
| Power-down current | 400 nA ultra-deep power-down (typical) - extends battery life in always-on sensor nodes |
Pinout & Package
AT45DB161E-MHD-Y is packaged in an 8-lead SOIC (0.208" wide), JEDEC-compliant with exposed pad not internally connected. Pin functions are optimized for minimal PCB routing: CS enables device selection, SI/SO handle bidirectional serial data, SCK clocks transfers, and WP provides hardware write protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; deassertion places SO in high-impedance state and enters standby mode |
| SI | Serial Input | Input for command, address, and data during write/program operations |
| SO | Serial Output | Output for status, ID, and read data; tri-stated when CS is high |
| SCK | Serial Clock | Input clock synchronizing all SPI transfers; supports up to 85 MHz in RapidS™ mode |
| WP | Write Protect | Hardware lock for sector protection register and lockdown; active-low, tied to VCC for enable |
| RESET | Reset Input | Active-low asynchronous reset; returns device to known state without power cycle |
| VCC | Power Supply | Single 2.3–3.6 V or 2.5–3.6 V supply - eliminates need for voltage translators in mixed-voltage systems |
| GND | Ground | Reference for all I/O and internal circuitry; must be low-impedance for stable SPI timing |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM buffers (512/528 B each) | Enables interleaved writes: while one buffer receives new data, the other programs into Flash - sustains continuous data streams without gaps |
| RapidS™ high-speed read mode | Supports 85 MHz continuous array reads with opcodes 0Bh/1Bh - reduces firmware load latency by >40% vs legacy E8h mode |
| User-configurable page size | Factory-set to 528 bytes (default) or 512 bytes - optimizes ECC overhead and page-level wear leveling |
| Program/erase suspend/resume | Allows interrupting background erase or program to service urgent reads - critical for real-time response in control systems |
| 128-byte OTP Security Register | Contains 64-byte factory UID + 64-byte user-programmable space - enables secure boot key storage and device identity binding |
Applications
| Industrial Data Logger | Medical Wearable Sensor Hub |
|---|---|
Use Scenario: Continuous acquisition of temperature, pressure, and vibration data at 1 kHz sampling rate over 72-hour periods. IC Role / Device Role / Timing Role: Nonvolatile buffer and archival storage; manages seamless wrap-around writes using dual SRAM buffers and auto-page rewrite. Use Value: Eliminates write stalls during Flash reprogramming - maintains uninterrupted data capture with <1 µs latency penalty per page boundary. | Use Scenario: Storing calibrated sensor coefficients, patient history, and firmware updates in a battery-powered ECG patch. IC Role / Device Role / Timing Role: Secure, low-power configuration and event log storage; leverages ultra-deep power-down (400 nA) between measurements. Use Value: Extends coin-cell battery life to >12 months while preserving tamper-resistant calibration data via sector lockdown. |
| Smart Meter Firmware Storage | Automotive Telematics Bootloader |
Use Scenario: Hosting field-upgradable metering firmware and tariff tables subject to regulatory audit requirements. IC Role / Device Role / Timing Role: Trusted code repository with hardware write protection (WP pin) and sector lockdown for immutable bootloader partition. Use Value: Prevents unauthorized modification of critical firmware sections - meets IEC 62056-6-2 security mandates for utility meters. | Use Scenario: Storing dual-application images (primary + fallback) and cryptographic keys for OTA updates in ADAS ECUs. IC Role / Device Role / Timing Role: High-reliability boot memory with rapid page read (6 ns tV) and 20-year data retention at 105°C junction temp. Use Value: Enables sub-100 ms cold-boot time and failsafe recovery - satisfies ISO 26262 ASIL-B functional safety requirements. |
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 | Quad SPI interface, no dual SRAM buffers, 1.8 V supply only, no RapidS™ mode | Lacks concurrent buffer write capability and hardware sector lockdown; requires software-managed E2PROM emulation | Select when quad I/O bandwidth is prioritized over continuous streaming and security features |
| Macronix MX25L1633F | Standard SPI only (no RapidS™), no OTP security register, 10-year data retention (vs. 20 years) | Missing factory UID and sector lockdown - insufficient for regulated medical or utility applications requiring traceability | Choose for cost-sensitive consumer electronics where extended retention and secure identity are non-critical |
Compared with W25Q16JW and MX25L1633F, the AT45DB161E-MHD-Y uniquely delivers dual-buffer streaming, 20-year retention, and hardware-enforced sector lockdown - making it the only option meeting stringent requirements for industrial logging, medical devices, and certified metering systems.
Availability
AT45DB161E-MHD-Y is available at Aetrix Electronics and suitable for industrial data loggers, medical wearables, smart meters, automotive telematics, and secure firmware storage requiring stable component supply across multi-year production cycles.
Supply support for AT45DB161E-MHD-Y 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 AT45DB161E-MHD-Y belongs to Renesas' DataFlash® family, engineered specifically for high-reliability, low-power, sequential-access storage in resource-constrained embedded systems requiring robust security and long-term data integrity.
FAQ
What is the maximum SPI clock frequency supported by the AT45DB161E-MHD-Y?
The AT45DB161E-MHD-Y supports up to 85 MHz in RapidS™ mode (opcodes 0Bh and 1Bh), with a guaranteed clock-to-output time (tV) of ≤6 ns. In standard SPI mode, the maximum frequency is 66 MHz. These speeds are validated across the full industrial temperature range (–40°C to +85°C) and require proper PCB layout with controlled impedance and minimized trace length to maintain signal integrity.
Does the AT45DB161E-MHD-Y support true byte-level programming like EEPROM?
No, the AT45DB161E-MHD-Y does not support direct byte-level programming. However, it enables E2PROM emulation through its built-in three-step read-modify-write operation, which uses the dual SRAM buffers to load a page, modify specific bytes, and rewrite the entire page - preserving data integrity without external logic. This method achieves effective byte-alterability while maintaining Flash endurance specifications.
How is sector protection implemented on the AT45DB161E-MHD-Y?
Sector protection on the AT45DB161E-MHD-Y is implemented via a dedicated Sector Protection Register (SPR) and hardware WP pin. Protection can be enabled/disabled via SPI commands (36h/39h), and individual sectors can be permanently locked down using the Sector Lockdown Register (SLR) and freeze command (3Ch). Once frozen, lockdown status cannot be reversed - providing irreversible read-only enforcement for bootloader or calibration data.
What package type does the AT45DB161E-MHD-Y use, and is thermal pad connection required?
The AT45DB161E-MHD-Y uses an 8-lead SOIC package (0.208" wide, JEDEC MS-012AC), designated "MHD" in the part number. The exposed metal pad on the bottom is not internally connected and may be left floating or tied to GND for mechanical stability and improved heat dissipation - no electrical connection is required for functional operation.
Can the AT45DB161E-MHD-Y operate from a 1.8 V supply?
No, the AT45DB161E-MHD-Y requires a minimum supply voltage of 2.3 V (or 2.5 V depending on grade) and operates within 2.3–3.6 V or 2.5–3.6 V ranges. It is not compatible with 1.8 V systems. Attempting operation below 2.3 V may result in undefined behavior, failed programming, or corrupted data retention - design must ensure VCC remains within specified limits during all operational modes including power-up and deep power-down resume.
AT45DB161E-MHD-Y Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- 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:
- 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-MHD-Y FAQ
1.How can I place an order for AT45DB161E-MHD-Y through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB161E-MHD-Y 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-MHD-Y reliable?
The price and inventory of AT45DB161E-MHD-Y are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB161E-MHD-Y is usually 5 days.
3.What payment methods are accepted for AT45DB161E-MHD-Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB161E-MHD-Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB161E-MHD-Y?
AT45DB161E-MHD-Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB161E-MHD-Y 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-MHD-Y?
For technical support, including AT45DB161E-MHD-Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB161E-MHD-Y requirements.
6.How does Aetrix verify that AT45DB161E-MHD-Y is sourced from the original manufacturer or authorized distributors?
All AT45DB161E-MHD-Y 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-MHD-Y meets industry standards.
7.What is the process for return or replacement of AT45DB161E-MHD-Y?
All AT45DB161E-MHD-Y units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB161E-MHD-Y, 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-MHD-Y part is unused and in its original packaging.
Return procedure for AT45DB161E-MHD-Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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