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Microchip Technology AT45DB161D-MU-2.5
- Part No.:
- AT45DB161D-MU-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT45DB161D-MU-2.5.pdf
- Description:
- IC FLASH 16MBIT SPI 50MHZ 8VDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,202
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Product details
Overview
AT45DB161D-MU-2.5 from Microchip Technology (formerly Atmel) is a 16-Mbit serial DataFlash memory IC with SPI-compatible RapidS interface, organized as 4,096 pages of 512- or 528-byte capacity, dual 512-/528-byte SRAM buffers, and hardware/software write protection - used for code shadowing, firmware storage, and embedded data logging in industrial controllers and medical devices.
For engineers reviewing the AT45DB161D-MU-2.5 datasheet, AT45DB161D-MU-2.5 pinout, AT45DB161D-MU-2.5 application, or AT45DB161D-MU-2.5 equivalent, key selection criteria include 66 MHz max clock frequency, flexible page/sector/block erase granularity, continuous array read capability, and 2.5V–3.6V single-supply operation with deep power-down current under 15 µA.
Technical Context
The AT45DB161D-MU-2.5 implements a sequential-access Flash architecture using Atmel RapidS™ serial interface - SPI Mode 0/3 compatible - eliminating parallel address/data buses and reducing pin count to 8 active signals. Its dual SRAM buffers enable simultaneous data reception and Flash reprogramming, supporting real-time streaming applications.
Memory is partitioned into 16 sectors (including two sub-sectors in Sector 0), with programmable page size (512 or 528 bytes), and supports four erase granularities: page (512 B), block (4 KB), sector (128 KB), and chip (16 Mbit). All program/erase operations are internally self-timed and require no external high-voltage supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 16 Mbit (2,097,152 bytes), organized as 4,096 × 512- or 528-byte pages |
| Interface Speed | Up to 66 MHz SCK for Continuous Array Read (0BH/E8H), enabling >8 MB/s sustained throughput |
| Supply Voltage | 2.5V–3.6V single supply - eliminates need for voltage translators in 2.5V/3.3V systems |
| Active Read Current | 7 mA typical - enables low-power boot loading and firmware updates in battery-backed systems |
| Deep Power-Down Current | 15 µA typical - supports ultra-low standby power in always-on edge nodes |
| Endurance & Retention | 100,000 program/erase cycles per page; 20-year data retention at industrial temperature range (−40°C to +85°C) |
| Security Features | 128-byte security register (64-byte user-programmable + 64-byte unique device ID); sector lockdown and hardware WP pin |
Pinout & Package
AT45DB161D-MU-2.5 is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) with standard 150-mil body width and gull-wing leads. The package is RoHS-compliant, halide-free, and Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; falling edge initiates command sequence, rising edge terminates operation and triggers self-timed execution |
| SCK | Serial Clock | Input clock controlling data transfer timing; commands and addresses latched on rising edge, SO data output on falling edge |
| SI | Serial Input | Command, address, and data input line; MSB-first protocol supports opcode + address + payload in single CS assertion |
| SO | Serial Output | Open-drain-capable output for read data; tri-stated when CS is high; supports shared bus topology |
| WP | Write Protect | Hardware-level sector protection override; low state blocks all program/erase commands to protected sectors regardless of software settings |
| RESET | Reset | Active-low asynchronous reset; terminates ongoing operation and returns state machine to idle without requiring power cycle |
| RDY/BUSY | Ready/Busy Indicator | Open-drain output pulled high externally; driven low during self-timed operations (program/erase/buffer transfers) to signal non-interruptible latency |
| VCC / GND | Power Supply | Single 2.5V–3.6V supply with dedicated ground; internal power-on reset eliminates need for external POR circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers | Two independent 512-/528-byte buffers enable concurrent data streaming into one buffer while programming the other to Flash - critical for real-time firmware updates |
| Continuous Array Read | Supports seamless wrap-around reads across page and array boundaries (E8H/0BH/03H opcodes) - eliminates address management overhead in boot code and audio playback |
| Flexible Erase Granularity | Four-tier erase hierarchy (page/block/sector/chip) allows precise wear leveling and partial firmware patching without full chip erase delays |
| Hardware + Software Protection | Combines physical WP pin (hardware lock) with sector protection register and lockdown capability - meets IEC 62443-3-3 requirements for secure firmware storage |
| JEDEC ID & Device Identity | Standard manufacturer/device ID read plus unique 64-byte device identifier - enables secure device authentication and anti-cloning in production provisioning |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Shadowing |
|---|---|
Use Scenario: Storing and executing boot firmware for programmable logic controllers operating in harsh environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast continuous read and deterministic page-program timing - serves as primary boot memory mapped via microcontroller SPI interface. Use Value: 66 MHz RapidS interface enables sub-100 ms firmware load time; 20-year retention and 100K-cycle endurance ensure field reliability over 15+ year product lifecycle. |
Use Scenario: Hosting verified bootloader and diagnostic firmware in portable ultrasound and infusion pump systems requiring secure, tamper-resistant storage. IC Role / Device Role / Timing Role: Secure code repository with sector lockdown and unique device ID - prevents unauthorized firmware modification and supports regulatory traceability. Use Value: Hardware WP pin + 128-byte security register meet FDA cybersecurity guidance for Class II medical devices; deep power-down mode extends battery life during standby. |
| Smart Meter Data Logging | Automotive Infotainment Asset Storage |
Use Scenario: Capturing time-stamped energy consumption logs in AMI smart meters with intermittent power and long deployment intervals. IC Role / Device Role / Timing Role: High-endurance data buffer supporting frequent small writes - leverages page erase + buffer-to-page program for efficient wear leveling. Use Value: 100,000 program/erase cycles per page and 2.5V operation allow reliable logging even during brownout conditions; sector protection isolates calibration data from user logs. |
Use Scenario: Storing UI assets, voice prompts, and map tiles in automotive head units where space-constrained PCB layout and thermal performance are critical. IC Role / Device Role / Timing Role: Compact serial Flash replacing parallel NOR - reduces board area by >60% and lowers EMI vs. 16-bit bus interfaces. Use Value: 8-pin SOIC footprint and 7 mA active current minimize thermal load; continuous read mode enables smooth GUI rendering without CPU polling overhead. |
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 W25Q16JVSSIQ | 16 Mbit Quad SPI (QSPI) interface; 133 MHz max clock; no dual buffers; no built-in continuous read wraparound | Better raw bandwidth but requires host-side buffering and address management for streaming use cases | Preferred for high-throughput code XIP where QSPI controller is available; not drop-in for RapidS-specific command sets |
| Macronix MX25L1606EM2I-12G | 16 Mbit standard SPI; 80 MHz max clock; single buffer; no sector lockdown or unique device ID | Lacks hardware security features and dual-buffer streaming capability - suitable only for basic firmware storage | Lower-cost option for cost-sensitive consumer applications without security or real-time streaming requirements |
Compared with W25Q16JVSSIQ and MX25L1606EM2I-12G, the AT45DB161D-MU-2.5 uniquely delivers simultaneous buffer streaming, continuous wraparound reads, and integrated security - making it optimal for safety-critical or real-time embedded systems where deterministic latency and data integrity are mandatory.
Availability
AT45DB161D-MU-2.5 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code shadowing, and smart meter data logging requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT45DB161D-MU-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
Microchip Technology acquired Atmel in 2016 and maintains full support for the legacy DataFlash product family, including technical documentation, validation tools, and long-term manufacturing commitments.
The AT45DB161D-MU-2.5 belongs to the DataFlash® series - designed specifically for embedded systems needing high-density serial Flash with streaming capability, low pin count, and integrated security - targeting industrial, medical, and automotive applications.
FAQ
What is the maximum clock frequency supported by AT45DB161D-MU-2.5 for continuous array read operations?
The AT45DB161D-MU-2.5 supports up to 66 MHz for Continuous Array Read using opcodes 0BH (High Frequency Mode) and E8H (Legacy Mode), as specified by the fCAR1 parameter. This enables sustained data throughput exceeding 8 MB/s, ideal for boot code loading and audio streaming applications where latency must be minimized.
Does AT45DB161D-MU-2.5 support both 512-byte and 528-byte page sizes, and how is this configured?
Yes, AT45DB161D-MU-2.5 supports both 512-byte and 528-byte page sizes. The configuration is factory-preprogrammed at wafer level and cannot be changed in-system. The selected page size determines address bit allocation (e.g., PA11–PA0 + BA9–BA0 for 528-byte mode; A20–A0 for 512-byte mode) and affects all read/write/erase command sequences.
How does the RDY/BUSY pin function during self-timed operations in AT45DB161D-MU-2.5?
The RDY/BUSY pin on AT45DB161D-MU-2.5 is an open-drain output pulled high externally. It is driven low during any internally self-timed operation - including page program, block erase, sector erase, chip erase, and buffer-to-Flash transfers - signaling that the device is busy and cannot accept new commands until the operation completes and the pin returns high.
Can AT45DB161D-MU-2.5 be used for EEPROM emulation, and what is required to implement it?
Yes, AT45DB161D-MU-2.5 supports EEPROM emulation via a three-step read-modify-write process managed by host firmware. This requires using the dual SRAM buffers to stage modifications, then writing updated data to a newly erased page. No hardware EEPROM interface is present - emulation relies entirely on software-managed wear leveling and page management.
What security mechanisms does AT45DB161D-MU-2.5 provide to protect stored firmware or configuration data?
AT45DB161D-MU-2.5 provides layered security: (1) hardware Write Protect (WP) pin for physical sector lockout, (2) software-configurable Sector Protection Register, (3) irreversible Sector Lockdown command, and (4) 128-byte Security Register containing 64-byte user space and 64-byte unique device ID - collectively enabling secure provisioning and anti-tampering in regulated environments.
AT45DB161D-MU-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- 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:
- 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-VDFN (6x5)
AT45DB161D-MU-2.5 FAQ
1.How can I place an order for AT45DB161D-MU-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB161D-MU-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-MU-2.5 reliable?
The price and inventory of AT45DB161D-MU-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-MU-2.5 is usually 5 days.
3.What payment methods are accepted for AT45DB161D-MU-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB161D-MU-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB161D-MU-2.5?
AT45DB161D-MU-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB161D-MU-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-MU-2.5?
For technical support, including AT45DB161D-MU-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB161D-MU-2.5 requirements.
6.How does Aetrix verify that AT45DB161D-MU-2.5 is sourced from the original manufacturer or authorized distributors?
All AT45DB161D-MU-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-MU-2.5 meets industry standards.
7.What is the process for return or replacement of AT45DB161D-MU-2.5?
All AT45DB161D-MU-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB161D-MU-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-MU-2.5 part is unused and in its original packaging.
Return procedure for AT45DB161D-MU-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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