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Microchip Technology AT45DB161E-SHD-T
- Part No.:
- AT45DB161E-SHD-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45DB161E-SHD-T.pdf
- Description:
- IC FLASH 16MBIT SPI 85MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,543
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Product details
Overview
AT45DB161E-SHD-T from Microchip Technology (formerly Atmel) is a 16-Mbit serial DataFlash memory with two 512/528-byte SRAM buffers, SPI interface supporting modes 0 and 3, 85 MHz max clock, and 6 ns clock-to-output time. It enables continuous streaming read/write in voice, image, and firmware storage applications.
For engineers reviewing the AT45DB161E-SHD-T datasheet, AT45DB161E-SHD-T pinout, AT45DB161E-SHD-T application, or AT45DB161E-SHD-T equivalent, key selection criteria include page size configurability (512 vs. 528 bytes), RapidS high-speed read support, dual-buffer interleaving capability, ultra-low power-down current (500 nA), and hardware write protection via WP pin.
Technical Context
The AT45DB161E-SHD-T uses a sequential-access Flash architecture with no parallel address bus - data is accessed via SPI commands only. Its memory is organized as 4,096 pages of 512 or 528 bytes, plus two independent SRAM buffers enabling simultaneous receive-and-program operation.
It supports five distinct Continuous Array Read opcodes (01h, 03h, 0Bh, 1Bh, E8h) for low-power, legacy, and high-frequency modes, each with defined dummy byte counts and SCK frequency limits (fCAR1/fCAR2/fCAR3). All program and erase operations are self-timed and include built-in error detection via Status Register EPE bit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 16 Mbits (2,097,152 bytes) main array + 512 Kbits extra space |
| Page size | Factory-configurable: 512 bytes (power-of-2) or 528 bytes (default) |
| Max clock frequency | 85 MHz for RapidS high-speed reads; 10 MHz for low-power read mode |
| Access time | 6 ns clock-to-output (tV) - enables tight timing margins in high-speed systems |
| Power consumption | 500 nA ultra-deep power-down (typical); 11 mA active read current (typical) |
| Endurance & retention | 100,000 program/erase cycles per page; 20-year data retention |
| Operating voltage | 2.3 V–3.6 V or 2.5 V–3.6 V single supply - supports wide-voltage battery and low-power designs |
Pinout & Package
AT45DB161E-SHD-T is packaged in an 8-lead SOIC (0.150" wide) with standard SPI-compatible pinout and hardware write protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates command sequence on high-to-low transition; holds device in standby when deasserted |
| SCK | Serial Clock | Controls data flow; SI latched on rising edge, SO output on falling edge |
| SI | Serial Input | Accepts opcodes, addresses, and input data; ignored when CS is high |
| SO | Serial Output | Outputs read data; tri-stated when CS is high |
| WP | Write Protect | Hardware lock: low state blocks program/erase on protected sectors regardless of software settings |
| RESET | Reset | Active-low; terminates ongoing operation and resets internal state machine |
| VCC | Power Supply | 2.3–3.6 V or 2.5–3.6 V single supply; powers all logic and memory functions |
| GND | Ground | Reference return path for VCC and signal lines |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM buffers | Two independent 512/528-byte buffers enable true concurrent read-while-write - critical for real-time streaming |
| RapidS interface | Supports up to 85 MHz SCK for high-throughput sequential reads without address overhead |
| Flexible erase granularity | Page (512/528 B), block (4 KB), sector (128 KB), or chip-level erase - optimizes wear leveling and update efficiency |
| OTP Security Register | 128-byte one-time programmable area: 64 bytes factory-unique ID + 64 bytes user-programmable for secure boot or binding |
| Program/Erase suspend | Allows pausing long operations (e.g., sector erase) to service urgent host requests - improves system responsiveness |
Applications
| Voice Recording System | Firmware Storage in Industrial PLC |
|---|---|
Use Scenario: Continuous audio capture at 16-bit/44.1 kHz with minimal latency and no buffer underrun. IC Role / Device Role / Timing Role: Primary nonvolatile streaming buffer using Continuous Array Read (01h opcode) and dual-buffer interleaved writes. Use Value: 6 ns tV and 10 MHz low-power read mode reduce CPU wait states and extend battery life in portable recorders. | Use Scenario: Storing and updating field-upgradable firmware images in a temperature-stable industrial controller. IC Role / Device Role / Timing Role: Firmware code storage with sector lockdown and hardware WP pin preventing accidental overwrite during brown-out events. Use Value: 100,000-cycle endurance and 20-year retention ensure reliable operation over 15+ year product lifecycles. |
| Digital Camera Image Buffer | Medical Sensor Data Logger |
Use Scenario: Burst-mode image capture where raw sensor frames must be written faster than flash page-program time allows. IC Role / Device Role / Timing Role: High-speed buffering via RapidS (1Bh opcode) reads and buffer-to-main-memory page programming with built-in erase. Use Value: Dual-buffer interleaving hides 20 ms typical page-program time (tEP), enabling sustained >5 MB/s write throughput. | Use Scenario: Long-term patient vitals logging with tamper-resistant audit trail and power-fail safe writes. IC Role / Device Role / Timing Role: Secure, low-power data sink using Deep Power-Down (3 µA) between samples and OTP register for device identity binding. Use Value: 500 nA ultra-deep power-down extends coin-cell battery life to >5 years in intermittent-sampling configurations. |
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; no SRAM buffers; 133 MHz QSPI clock; no RapidS or continuous-read optimization | Lacks dual-buffer streaming; requires external RAM for read-while-write; better for XIP code execution | Select if system needs execute-in-place (XIP) or quad I/O bandwidth; avoid if continuous streaming or low-latency buffer switching is required. |
| Macronix MX25L1606EM2I-12G | 16 Mbit standard SPI NOR Flash; no SRAM buffers; 80 MHz max clock; no OTP security register or sector lockdown | No hardware write protection granularity; no dedicated security register; simpler command set | Select for cost-sensitive, non-security-critical firmware storage where buffer interleaving is unnecessary. |
Compared with W25Q16JVSSIQ and MX25L1606EM2I-12G, the AT45DB161E-SHD-T uniquely delivers integrated SRAM buffers for true concurrent access, RapidS-optimized continuous reads, and hardware-enforced sector lockdown - making it irreplaceable in streaming, secure, or real-time deterministic applications.
Availability
AT45DB161E-SHD-T is available at Aetrix Electronics and suitable for voice recording systems, industrial firmware storage, digital camera buffers, and medical data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT45DB161E-SHD-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
Microchip Technology acquired Atmel in 2016 and maintains full support for the legacy DataFlash product family, including documentation, validation, and long-term supply assurance.
The AT45DB161E-SHD-T belongs to the DataFlash® series - designed specifically for high-reliability, low-pin-count sequential data storage in resource-constrained embedded systems where parallel Flash or EEPROM interfaces are impractical.
FAQ
What is the default page size configuration for the AT45DB161E-SHD-T?
The AT45DB161E-SHD-T ships with 528-byte pages as the default configuration. This "extra" 16 bytes per page (beyond standard 512-byte power-of-2 alignment) accommodates metadata, ECC, or file-system headers. Factory pre-configuration for 512-byte pages is available but not standard for the -SHD-T variant. The page size is fixed at manufacture and cannot be changed in-circuit.
Does the AT45DB161E-SHD-T support Quad SPI or only standard SPI?
The AT45DB161E-SHD-T supports only standard 3-wire SPI (SI, SO, SCK) in modes 0 and 3 - it does not implement Quad SPI, Dual SPI, or QPI interfaces. Its RapidS protocol enhances speed within standard SPI timing by optimizing continuous-read command sequences and reducing dummy byte overhead, but retains pin compatibility with legacy SPI controllers.
How does the WP pin function on the AT45DB161E-SHD-T, and can it be left unconnected?
The WP (Write Protect) pin on the AT45DB161E-SHD-T is active-low and internally pulled high. When held low, it hardware-locks all sectors marked in the Sector Protection Register - overriding software protection commands. It may be left floating if unused, but Microchip recommends connecting it to VCC for noise immunity. Leaving it unconnected risks unintended protection activation due to noise coupling.
What is the purpose of the two SRAM buffers in the AT45DB161E-SHD-T, and how are they accessed?
The AT45DB161E-SHD-T integrates two independent 512/528-byte SRAM buffers (Buffer 1 and Buffer 2) accessible via dedicated SPI opcodes (e.g., 84h/87h for write, D4h/D6h for read). They enable true concurrent operation: while one buffer streams data to/from the host, the other can be programmed into main memory - eliminating write stalls in continuous-data applications like audio or sensor logging.
Is the AT45DB161E-SHD-T RoHS compliant and qualified for industrial temperature range?
Yes, the AT45DB161E-SHD-T is RoHS compliant (Pb/Halide-free) and fully qualified for the industrial temperature range of –40°C to +85°C. Its green packaging meets JEDEC standards, and all electrical specifications - including 500 nA ultra-deep power-down current and 100,000-cycle endurance - are guaranteed across this full range.
AT45DB161E-SHD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- 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-SHD-T FAQ
1.How can I place an order for AT45DB161E-SHD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB161E-SHD-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-SHD-T reliable?
The price and inventory of AT45DB161E-SHD-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-SHD-T is usually 5 days.
3.What payment methods are accepted for AT45DB161E-SHD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB161E-SHD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB161E-SHD-T?
AT45DB161E-SHD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB161E-SHD-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-SHD-T?
For technical support, including AT45DB161E-SHD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB161E-SHD-T requirements.
6.How does Aetrix verify that AT45DB161E-SHD-T is sourced from the original manufacturer or authorized distributors?
All AT45DB161E-SHD-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-SHD-T meets industry standards.
7.What is the process for return or replacement of AT45DB161E-SHD-T?
All AT45DB161E-SHD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB161E-SHD-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-SHD-T part is unused and in its original packaging.
Return procedure for AT45DB161E-SHD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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