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Microchip Technology AT45DB161E-SSHD-B
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- Part No.:
- AT45DB161E-SSHD-B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT45DB161E-SSHD-B.pdf
- Description:
- IC FLASH 16MBIT SPI 85MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,573
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Product details
Overview
AT45DB161E-SSHD-B from Microchip Technology (formerly Atmel) is a 16-Mbit serial DataFlash memory with dual 512/528-byte SRAM buffers, SPI interface compliant with modes 0 and 3, 85 MHz max clock rate, and 6 ns clock-to-output time. It enables continuous streaming read/write in voice, image, and firmware storage applications using RapidS high-speed protocol.
For engineers reviewing the AT45DB161E-SSHD-B datasheet, AT45DB161E-SSHD-B pinout, AT45DB161E-SSHD-B application, or AT45DB161E-SSHD-B equivalent, key selection criteria include page size configurability (512 vs. 528 bytes), buffer interleaving for real-time data capture, sector lockdown for secure firmware partitioning, and ultra-low 500 nA deep power-down current.
Technical Context
The AT45DB161E-SSHD-B implements a sequential-access Flash architecture with two independent SRAM buffers, enabling simultaneous reception into one buffer while reprogramming the main array from the other - critical for uninterrupted audio/video streaming. Its RapidS interface supports up to 85 MHz SCK with multiple read command variants (01h, 03h, 0Bh, 1Bh, E8h) optimized for low-power, legacy, or high-frequency operation.
Memory organization comprises 4,096 pages of 512 or 528 bytes each (17,301,504 bits total), plus 128-byte OTP security register (64-byte factory UID + 64-byte user-programmable). Erase granularity spans page (512/528 B), block (4 KB), sector (128 KB), and chip (16 Mbit), with suspend/resume capability during program/erase cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbits (2,048 KB) main memory + 512 Kbits extra space; supports firmware, audio, and image storage in space-constrained systems. |
| Page Size | Factory-configurable 512 or 528 bytes; 528-byte default enables ECC byte per page without software overhead. |
| Max Clock Frequency | 85 MHz (RapidS mode); enables >8 MB/s sustained read throughput for real-time media buffering. |
| Power-Down Current | 500 nA typical ultra-deep power-down; extends battery life in always-on sensor or IoT edge nodes. |
| Endurance & Retention | 100,000 program/erase cycles per page; 20-year data retention - suitable for field-upgradable embedded controllers. |
| Operating Voltage | 2.3 V–3.6 V or 2.5 V–3.6 V single supply; eliminates level-shifting in 2.5 V/3.3 V microcontroller interfaces. |
| Temperature Range | −40°C to +85°C industrial grade; validated for automotive infotainment head units and industrial HMIs. |
Pinout & Package
AT45DB161E-SSHD-B uses an 8-lead SOIC (0.150" wide) package with exposed pad not internally connected. All pins support standard SPI timing with CS-controlled command framing and RESET-initiated state recovery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates command sequence on high-to-low transition and terminates on low-to-high; places SO in high-Z when deasserted. |
| SCK | Serial Clock | Master-generated clock; latches SI on rising edge, clocks SO on falling edge; supports up to 85 MHz for RapidS operation. |
| SI | Serial Input | Command, address, and data input; ignored when CS is high; MSB-first protocol alignment required. |
| SO | Serial Output | Data output; tri-stated when CS is high; outputs status, memory, or buffer data depending on active command. |
| WP | Write Protect | Hardware-level sector lock; prevents program/erase when asserted low, independent of software protection registers. |
| RESET | Reset Input | Active-low asynchronous reset; terminates ongoing operations and returns internal state machine to idle; internal POR eliminates external RC network. |
| VCC | Power Supply | Single 2.3–3.6 V supply; powers all logic and Flash operations; no high-voltage programming required. |
| GND | Ground Reference | System ground return; decoupling capacitor placement near VCC/GND pins required for noise immunity at 85 MHz. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Independent SRAM Buffers | Two 512/528-byte buffers enable concurrent data ingestion and Flash programming - essential for gapless audio recording or video frame buffering. |
| RapidS High-Speed Interface | Supports 85 MHz SCK with 0Bh/1Bh opcodes; delivers 8.5 MB/s peak read bandwidth, outperforming standard SPI Flash in throughput-critical applications. |
| User-Configurable Page Size | Factory-set 512-byte "power-of-two" mode simplifies memory management in RTOS environments; 528-byte default accommodates ECC metadata transparently. |
| Program/Erase Suspend & Resume | Allows interruption of long erase cycles (e.g., sector erase) to service urgent reads or writes - improves system responsiveness in multitasked embedded firmware. |
| 128-Byte OTP Security Register | 64-byte factory UID enables device authentication; 64-byte user area stores cryptographic keys or calibration data with permanent write-lock capability. |
Applications
| Voice Recording System | Firmware Storage for MCU |
|---|---|
Use Scenario: Continuous analog-to-digital audio stream captured at 16-bit/44.1 kHz into embedded recorder with no gaps or dropouts. IC Role / Device Role / Timing Role: AT45DB161E-SSHD-B acts as streaming buffer and persistent storage, using dual-SRAM interleaving to accept new samples while writing prior buffer to Flash. Use Value: Eliminates need for external DRAM; 500 nA deep power-down extends battery life to >6 months in portable voice loggers. | Use Scenario: Field-upgradable bootloader and application firmware stored on a Cortex-M4-based motor controller operating in harsh industrial environments. IC Role / Device Role / Timing Role: AT45DB161E-SSHD-B serves as secure, wear-leveled code storage with sector lockdown protecting bootloader partition from accidental overwrite. Use Value: 100,000-cycle endurance ensures >10 years of daily firmware updates; industrial temperature rating guarantees reliability at 85°C ambient. |
| Digital Camera Image Buffer | Medical Sensor Data Logger |
Use Scenario: Burst-mode JPEG capture at 10 fps with immediate offload to nonvolatile storage while sensor continues exposure sequencing. IC Role / Device Role / Timing Role: AT45DB161E-SSHD-B functions as high-speed intermediate buffer and archive, leveraging RapidS 85 MHz reads to sustain 10+ MB/s write pipelines. Use Value: Continuous Array Read (0Bh opcode) enables zero-latency page boundary crossing - critical for maintaining frame rate during multi-page image writes. | Use Scenario: Long-term acquisition of ECG waveforms sampled at 1 kS/s for 72-hour clinical monitoring with local storage before wireless upload. IC Role / Device Role / Timing Role: AT45DB161E-SSHD-B provides deterministic, low-power data staging with programmable sector protection to preserve diagnostic integrity. Use Value: 20-year data retention meets IEC 62304 requirements; 2.3 V minimum VCC allows operation directly from aging lithium coin cells. |
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), no SRAM buffers, 133 MHz max clock, no RapidS or continuous-read wraparound. | Lacks dual-buffer streaming; requires software-managed wear leveling; better suited for code XIP than real-time streaming. | Select if QSPI interface and higher clock speed outweigh need for seamless buffer-to-Flash transfer. |
| Macronix MX25L1606EM2I-12G | 16 Mbit standard SPI, no SRAM buffers, 80 MHz max clock, no page-size configuration or OTP register. | No hardware-accelerated streaming; relies on external controller for ECC and buffer management; lower security feature set. | Choose for cost-sensitive designs where buffer interleaving and UID-based authentication are unnecessary. |
Compared with W25Q16JVSSIQ and MX25L1606EM2I-12G, the AT45DB161E-SSHD-B uniquely integrates dual SRAM buffers and RapidS for deterministic streaming, offers factory-programmed UID for traceability, and supports configurable page sizes - making it optimal for audio, imaging, and secure firmware logging where latency and data integrity are critical.
Availability
AT45DB161E-SSHD-B is available at Aetrix Electronics and suitable for voice recording systems, firmware storage for MCUs, digital camera image buffering, and medical sensor data logging requiring stable component supply and long-term lifecycle support.
Supply support for AT45DB161E-SSHD-B 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 DataFlash product family, emphasizing robustness, security, and low-power operation for embedded systems.
The AT45DB161E belongs to the DataFlash® series designed specifically for sequential-access, high-reliability storage in resource-constrained applications - prioritizing streaming efficiency, data integrity, and industrial-grade longevity over random-access speed.
FAQ
What is the primary function of the AT45DB161E-SSHD-B in an embedded system?
The AT45DB161E-SSHD-B serves as a high-reliability, low-pin-count serial Flash memory with integrated dual SRAM buffers. Its primary function is to enable continuous streaming of audio, image, or sensor data while simultaneously writing to nonvolatile storage - eliminating gaps caused by Flash program latency. The AT45DB161E-SSHD-B achieves this via buffer interleaving, RapidS high-speed interface, and seamless page-boundary crossing during continuous reads.
Does the AT45DB161E-SSHD-B support both 512-byte and 528-byte page configurations?
Yes, the AT45DB161E-SSHD-B supports both page sizes: 528 bytes is the default configuration, while 512 bytes can be factory pre-configured. This flexibility allows system designers to choose between ECC-ready layout (528-byte) or power-of-two alignment (512-byte) for simplified memory management in RTOS or bare-metal firmware. The AT45DB161E-SSHD-B maintains full command compatibility across both modes, with address bit mapping adjusted accordingly.
How does the AT45DB161E-SSHD-B handle power loss during a program or erase operation?
Every program and erase cycle in the AT45DB161E-SSHD-B is self-timed and atomic: once initiated, it completes independently of host control or power state. If power is lost mid-operation, the AT45DB161E-SSHD-B enters an undefined state and requires a hardware RESET or power cycle to recover. The device does not implement internal power-loss protection circuitry; designers must ensure stable VCC during active operations or use the WP pin to prevent unintended writes during brown-out conditions.
Can the AT45DB161E-SSHD-B be used as a direct replacement for standard SPI NOR Flash devices?
No, the AT45DB161E-SSHD-B is not a drop-in replacement for conventional SPI NOR Flash due to its sequential-access architecture, dual-buffer command set, and lack of random-address read capability. While it shares the same 8-pin SOIC footprint and basic SPI signals (CS/SCK/SI/SO), the AT45DB161E-SSHD-B requires distinct firmware drivers for buffer management, page-aligned programming, and RapidS timing - making it incompatible with generic SPI Flash HAL libraries without modification.
What security features does the AT45DB161E-SSHD-B provide for firmware protection?
The AT45DB161E-SSHD-B provides three layers of firmware protection: (1) hardware Write Protect (WP) pin that globally disables program/erase regardless of software state; (2) individual sector protection and permanent lockdown via Sector Protection Register; and (3) 128-byte OTP Security Register containing 64-byte factory UID and 64-byte user-programmable space for keys or hashes. These features allow secure bootloader partitioning and tamper-resistant firmware updates - all enforced within the AT45DB161E-SSHD-B silicon, without external components.
AT45DB161E-SSHD-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 85 MHz
- Write Cycle Time - Word, Page:
- 8µs, 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
AT45DB161E-SSHD-B FAQ
1.How can I place an order for AT45DB161E-SSHD-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB161E-SSHD-B 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-SSHD-B reliable?
The price and inventory of AT45DB161E-SSHD-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB161E-SSHD-B is usually 5 days.
3.What payment methods are accepted for AT45DB161E-SSHD-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB161E-SSHD-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB161E-SSHD-B?
AT45DB161E-SSHD-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB161E-SSHD-B 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-SSHD-B?
For technical support, including AT45DB161E-SSHD-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB161E-SSHD-B requirements.
6.How does Aetrix verify that AT45DB161E-SSHD-B is sourced from the original manufacturer or authorized distributors?
All AT45DB161E-SSHD-B 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-SSHD-B meets industry standards.
7.What is the process for return or replacement of AT45DB161E-SSHD-B?
All AT45DB161E-SSHD-B units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB161E-SSHD-B, 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-SSHD-B part is unused and in its original packaging.
Return procedure for AT45DB161E-SSHD-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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