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Microchip Technology AT45DB161D-MU
- Part No.:
- AT45DB161D-MU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT45DB161D-MU.pdf
- Description:
- IC FLASH 16MBIT SPI 66MHZ 8VDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,704
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Product details
Overview
AT45DB161D-MU from Microchip Technology (formerly Atmel) is a 16-Mbit serial DataFlash memory IC with SPI-compatible RapidS interface, 512/528-byte page architecture, dual 512/528-byte SRAM buffers, and hardware/software write protection-used for code shadowing, firmware storage, and embedded data logging in industrial controllers.
For engineers reviewing the AT45DB161D-MU datasheet, AT45DB161D-MU pinout, AT45DB161D-MU application, or AT45DB161D-MU equivalent, key selection criteria include 66 MHz max clock frequency, flexible erase granularity (page/block/sector/chip), continuous array read capability, 2.5V–3.6V single-supply operation, and industrial temperature range support.
Technical Context
The AT45DB161D-MU implements a sequential-access Flash architecture using a 3-wire SPI-compatible RapidS interface (modes 0 and 3), eliminating parallel address/data buses to reduce pin count and layout complexity. It integrates two independent SRAM buffers that enable simultaneous data reception and Flash reprogramming.
Its memory organization comprises 4,096 pages of 512- or 528-byte capacity, configurable at factory or via command, with sector-level lockdown and a 128-byte security register containing 64-byte user-programmable space and unique 64-byte device ID-supporting secure firmware updates and tamper-resistant data storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2,097,152 bytes) organized as 4,096 × 512/528-byte pages |
| Interface | SPI-compatible Atmel RapidS™ with 66 MHz max SCK frequency (modes 0/3) |
| Supply Voltage | Single 2.5V–3.6V or 2.7V–3.6V supply-no high-voltage programming required |
| Power Consumption | 7 mA typical active read current; 25 µA standby; 15 µA deep power-down |
| Erase Endurance | ≥100,000 program/erase cycles per page |
| Data Retention | 20 years at 85°C |
| Operating Temp | −40°C to +85°C industrial grade |
Pinout & Package
AT45DB161D-MU is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) with exposed pad, RoHS-compliant, green packaging. Pin functions are defined per JEDEC MS-012 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enables serial communication; low-to-high transition ends self-timed operations |
| SCK | Serial Clock | Controls data timing: SI latched on rising edge; SO driven on falling edge |
| SI | Serial Input | Accepts opcodes, addresses, and data; MSB-first protocol |
| SO | Serial Output | Outputs read data and status bits; tri-stated when CS is high |
| WP | Write Protect | Hardware-level sector lockout; overrides software protection when asserted low |
| RESET | Reset Input | Aborts ongoing operation and resets internal state machine; internally pulled high |
| RDY/BUSY | Open-drain Status | Drives low during self-timed erase/program/buffer transfers; requires external pull-up |
| VCC / GND | Power Supply | Single 2.5–3.6 V supply; GND serves as reference for all I/O and internal logic |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers | Two independent 512/528-byte buffers enable concurrent data streaming and Flash reprogramming-critical for real-time firmware updates |
| Flexible Erase Granularity | Page (512 B), block (4 KB), sector (128 KB), or full chip (16 Mbit) erase options minimize wear and optimize update latency |
| Continuous Array Read | Legacy (E8H), high-speed (0BH), and low-speed (03H) modes support seamless code shadowing without address reissuing |
| Security Architecture | 128-byte security register with 64-byte user space + unique 64-byte device ID enables secure boot and anti-cloning |
| Hardware Write Protection | WP pin provides fail-safe, non-volatile sector lockdown independent of software state-essential for safety-critical systems |
Applications
| Industrial PLC Firmware Storage | Medical Device Data Logging |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers with field upgrade capability. IC Role / Device Role / Timing Role: Nonvolatile firmware repository with rapid page reprogramming and sector lockdown to prevent accidental corruption. Use Value: Enables safe in-system firmware updates without requiring external high-voltage programming circuitry or system reset. | Use Scenario: Capturing time-stamped sensor readings (ECG, SpO₂) in portable diagnostic equipment between host uploads. IC Role / Device Role / Timing Role: High-reliability, low-power data buffer with continuous read capability for background data streaming. Use Value: Dual-buffer architecture allows uninterrupted acquisition while previously captured data is read out via SPI-no data loss during transfer. |
| Automotive Infotainment Boot Code | Smart Meter Firmware & Event History |
Use Scenario: Hosting boot code and UI assets for automotive head units where fast code shadowing into RAM is required. IC Role / Device Role / Timing Role: Serial Flash memory supporting 66 MHz continuous read for zero-wait-state execution from external memory. Use Value: Eliminates need for parallel NOR Flash; reduces PCB layer count and EMI by using 3-wire SPI interface. | Use Scenario: Storing tariff tables, firmware patches, and tamper-evident event logs (power outage, meter reset) in utility smart meters. IC Role / Device Role / Timing Role: Secure, long-retention storage with sector lockdown and device-unique ID for regulatory compliance and audit traceability. Use Value: Hardware WP + security register ensures critical calibration and billing data cannot be altered without physical intervention. |
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 NOR Flash; 133 MHz max clock; no dual SRAM buffers; no continuous array read mode | Better random access speed; lacks built-in buffering for streaming; requires different driver stack | Choose for faster random reads or QSPI host compatibility; avoid if continuous read or buffer overlap is required |
| Macronix MX25L1606EM2I-12G | 16 Mbit standard SPI NOR Flash; 80 MHz max clock; no SRAM buffers; no sector lockdown or security register | Lower cost; simpler command set; no hardware write protect pin or device ID | Choose for basic firmware storage where security and streaming features are unnecessary |
Compared with W25Q16JVSSIQ and MX25L1606EM2I-12G, the AT45DB161D-MU uniquely supports concurrent buffer loading and Flash programming, continuous array read for code shadowing, and hardware-enforced sector lockdown-making it optimal for deterministic embedded data acquisition and secure firmware deployment.
Availability
AT45DB161D-MU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device data logging, and automotive infotainment boot code applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT45DB161D-MU 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 the DataFlash product line, delivering high-reliability serial Flash solutions for industrial, automotive, and medical markets.
The AT45DB161D-MU belongs to the Atmel DataFlash family-designed specifically for sequential-access, low-pin-count, low-power embedded storage where continuous read, dual-buffer streaming, and hardware security are essential.
FAQ
What is the maximum clock frequency supported by the AT45DB161D-MU for continuous array read operations?
The AT45DB161D-MU supports up to 66 MHz for continuous array read in both Legacy (E8H) and High-Frequency (0BH) modes, as specified by the fCAR1 parameter. This enables zero-wait-state code shadowing into processor RAM. The Low-Frequency mode (03H) operates up to 33 MHz without dummy bytes. All modes maintain seamless page-boundary crossing and array wraparound behavior-ensuring uninterrupted data flow during AT45DB161D-MU read operations.
Does the AT45DB161D-MU require high-voltage programming or external charge pumps?
No, the AT45DB161D-MU operates entirely from a single 2.5V–3.6V supply for all read, program, and erase functions-no high-voltage programming pins or external charge pumps are needed. All internal programming and erase cycles are self-timed and voltage-regulated. This simplifies power design and eliminates risk of overvoltage damage during AT45DB161D-MU field updates, making it ideal for battery-powered and space-constrained applications.
How does the dual-buffer architecture of the AT45DB161D-MU improve system throughput?
The AT45DB161D-MU's two independent 512/528-byte SRAM buffers allow simultaneous data reception on one buffer while the other buffer's contents are being programmed into Flash memory. This pipelining eliminates idle time between data acquisition and storage, enabling sustained streaming-critical for AT45DB161D-MU use in real-time data loggers, audio recorders, and firmware update agents where latency must be minimized.
Can the AT45DB161D-MU be used as a direct replacement for standard SPI NOR Flash devices?
The AT45DB161D-MU is not a pin- or command-compatible drop-in replacement for standard SPI NOR Flash due to its sequential-access architecture, dual-buffer commands, and RapidS-specific opcodes (e.g., E8H, 0BH). While electrically compatible on SPI lines, host firmware must implement DataFlash-specific protocols-including page-aligned addressing and buffer management-to correctly utilize AT45DB161D-MU functionality.
What security mechanisms does the AT45DB161D-MU provide for protecting stored firmware or configuration data?
The AT45DB161D-MU provides three layered security features: (1) hardware WP pin for physical sector lockout, (2) software-configurable Sector Protection Register, and (3) a 128-byte Security Register containing 64-byte user-programmable space and a unique 64-byte device identifier. These features collectively prevent unauthorized modification or cloning of firmware and calibration data-making AT45DB161D-MU suitable for certified medical and industrial control applications.
AT45DB161D-MU 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:
- 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:
- 8-VDFN (6x5)
AT45DB161D-MU FAQ
1.How can I place an order for AT45DB161D-MU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB161D-MU 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 reliable?
The price and inventory of AT45DB161D-MU 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 is usually 5 days.
3.What payment methods are accepted for AT45DB161D-MU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB161D-MU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB161D-MU?
AT45DB161D-MU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB161D-MU 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?
For technical support, including AT45DB161D-MU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB161D-MU requirements.
6.How does Aetrix verify that AT45DB161D-MU is sourced from the original manufacturer or authorized distributors?
All AT45DB161D-MU 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 meets industry standards.
7.What is the process for return or replacement of AT45DB161D-MU?
All AT45DB161D-MU units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB161D-MU, 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 part is unused and in its original packaging.
Return procedure for AT45DB161D-MU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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