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Renesas AT45DB161E-SHF2B-T
- Part No.:
- AT45DB161E-SHF2B-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45DB161E-SHF2B-T.pdf
- Description:
- IC FLASH 16MBIT SPI 85MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,283
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Product details
Overview
AT45DB161E-SHF2B-T from Renesas Electronics is a 16-Mbit serial DataFlash memory with 512/528-byte page architecture, SPI-compatible interface (modes 0 and 3), RapidS™ high-speed operation up to 85 MHz, and dual 512/528-byte SRAM buffers enabling concurrent read-while-write. It operates from a single 2.3–3.6 V supply and targets embedded firmware storage, voice/image buffering, and E²PROM emulation in space-constrained industrial controllers.
For engineers reviewing the AT45DB161E-SHF2B-T datasheet, AT45DB161E-SHF2B-T pinout, AT45DB161E-SHF2B-T application, or AT45DB161E-SHF2B-T equivalent, key selection criteria include its 85 MHz RapidS timing, ultra-deep power-down current (400 nA), factory-configurable 512-byte page mode, sector lockdown security, and SOIC-8 (0.208" wide) packaging - all critical for low-power, secure, high-throughput serial flash integration.
Technical Context
The AT45DB161E-SHF2B-T implements a sequential-access Flash architecture with two independent SRAM buffers, enabling true interleaved write operations: while one buffer receives new data via SPI, the other transfers content to main memory without halting host communication. Its RapidS™ mode uses optimized command sequences (e.g., 0Bh/1Bh opcodes) to achieve 6 ns clock-to-output timing and sustained 85 MHz operation.
Memory organization supports flexible erase granularity - page (512/528 B), block (4 kB), sector (128 kB), and full chip (16 Mbits) - with suspend/resume capability during active program/erase cycles. Sector protection and permanent lockdown are enforced via dedicated registers and hardware WP pin control, complemented by a 128-byte OTP security register containing 64 bytes of factory-unique ID.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 16 Mbits (2,097,152 bytes) main array + 512 kbits extra space; organized as 4,096 pages × 512 or 528 bytes |
| Interface | SPI-compatible, supports modes 0 and 3; RapidS™ high-speed protocol enables 85 MHz operation |
| Timing Performance | 6 ns max clock-to-output (tV); supports continuous array read at up to 85 MHz or low-power read at ≤15 MHz |
| Power Consumption | 400 nA ultra-deep power-down (typ), 5 µA deep power-down (typ), 25 µA standby (typ), 7 mA active read @15 MHz (typ) |
| Erase/Program Endurance | 100,000 program/erase cycles per page minimum; 20-year data retention |
| Security Features | Individual sector protection & permanent lockdown; 128-byte OTP security register (64-byte factory ID + 64-byte user programmable) |
| Operating Voltage | Single 2.3 V–3.6 V or 2.5 V–3.6 V supply; no high-voltage programming required |
Pinout & Package
AT45DB161E-SHF2B-T is packaged in an 8-lead SOIC (0.208" wide, JEDEC standard), with pinout validated per Figure 1 and Table 1 of DS-AT45DB161E-8782 Rev. P.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; places device in standby (high-Z SO) when deasserted; required for all command initiation |
| SCK | Serial Clock | Input clock synchronizing all SPI transfers; supports up to 85 MHz in RapidS™ mode |
| SI | Serial Input | MOSI line for command/address/data input; sampled on SCK rising edge (mode 0) or falling edge (mode 3) |
| SO | Serial Output | MISO line for data output; driven only when CS is asserted; high-impedance when CS is deasserted |
| WP | Write Protect | Hardware sector protection enable; low = protection active; overrides software sector lock commands |
| RESET | Reset Input | Active-low hardware reset; returns device to power-on state; optional (can be tied to VCC if unused) |
| VCC | Power Supply | 2.3–3.6 V or 2.5–3.6 V single supply; powers core, I/O, and internal charge pump |
| GND | Ground | Reference for all signals and power; must be low-impedance connection for stable timing and noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers | Two independent 512/528-byte buffers enable simultaneous host data reception and main memory reprogramming - eliminating write latency bottlenecks in streaming applications |
| RapidS™ High-Speed Mode | Optimized command set (0Bh/1Bh opcodes) delivers 85 MHz operation and 6 ns tV, doubling throughput vs. legacy SPI flash in continuous read |
| Flexible Page Size Configuration | User-selectable or factory-preconfigured 512-byte pages reduce wasted space in byte-aligned firmware updates and improve density efficiency |
| Program/Erase Suspend & Resume | Allows immediate interruption of long erase/write cycles to service time-critical reads or commands - essential for real-time system responsiveness |
| Sector Lockdown Security | Hardware-enforced permanent read-only status for any sector via OTP register; prevents accidental or malicious overwrite of boot code or calibration data |
| Ultra-Low Power States | 400 nA ultra-deep power-down current enables multi-year battery life in always-on sensor nodes and portable medical devices |
Applications
| Firmware Storage in Industrial PLCs | Secure Boot Code Retention |
|---|---|
Use Scenario: Storing field-upgradable ladder logic and configuration parameters in programmable logic controllers operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Nonvolatile serial flash providing reliable, low-pin-count firmware storage with rapid page access for runtime code loading. Use Value: Dual-buffer interleaving enables background firmware download while maintaining real-time I/O scanning; sector lockdown protects bootloader integrity against corruption. |
Use Scenario: Holding immutable boot firmware and cryptographic keys in medical diagnostic equipment requiring regulatory compliance and tamper resistance. IC Role / Device Role / Timing Role: Secure, high-reliability serial flash with permanent sector lockdown and factory-programmed unique ID for device authentication. Use Value: 128-byte OTP security register stores 64-byte factory ID and 64-byte user keys; lockdown prevents unauthorized modification of boot sectors during field servicing. |
| Voice/Data Buffering in IoT Gateways | E²PROM Emulation in Smart Sensors |
Use Scenario: Capturing and buffering audio streams or telemetry bursts from multiple wireless sensor nodes before aggregation and transmission. IC Role / Device Role / Timing Role: High-speed sequential-access memory supporting continuous array read at 85 MHz and low-power read at ≤15 MHz for adaptive power management. Use Value: RapidS™ mode sustains >8 MB/s effective throughput; ultra-deep power-down (400 nA) extends battery life between voice capture events. |
Use Scenario: Replacing discrete EEPROM in temperature/humidity sensors requiring frequent small-data writes (e.g., calibration offsets, event logs). IC Role / Device Role / Timing Role: Serial flash implementing self-contained read-modify-write cycles to emulate byte-alterable nonvolatile storage. Use Value: On-chip buffers and page-level erase allow efficient bit/byte updates without full-page erasure overhead; 100,000-cycle endurance exceeds typical sensor lifetime 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 | 16 Mbit Quad SPI (QSPI) interface; no dual SRAM buffers; 133 MHz max clock; no RapidS™ or sector lockdown | Lacks concurrent read-while-write and hardware-enforced sector immutability; requires external logic for E²PROM emulation | Choose for QSPI host compatibility and higher raw bandwidth; avoid where buffer interleaving or permanent sector protection is required. |
| Macronix MX25L1633F | 16 Mbit standard SPI; 104 MHz max; no SRAM buffers; supports DTR mode; no OTP security register or sector lockdown | No built-in mechanism for secure boot partitioning or low-overhead byte-alterable storage; relies on software-only protection | Select for cost-sensitive designs needing basic SPI flash with fast read; not suitable for safety-critical boot storage or streaming write workloads. |
Compared with Winbond W25Q16JW and Macronix MX25L1633F, the AT45DB161E-SHF2B-T uniquely delivers dual-buffer concurrency, hardware sector lockdown, and RapidS™ timing - making it optimal for systems demanding secure, low-latency, streaming-capable serial flash without QSPI hardware dependency.
Availability
AT45DB161E-SHF2B-T is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and IoT edge gateway designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for AT45DB161E-SHF2B-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
Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and enterprise applications.
The AT45DB161E belongs to Renesas' DataFlash family, designed specifically for high-reliability, low-pin-count serial flash applications requiring concurrent operation, advanced security, and ultra-low power states in harsh environments.
FAQ
What voltage range does the AT45DB161E-SHF2B-T support?
The AT45DB161E-SHF2B-T operates from a single 2.3 V to 3.6 V supply or a 2.5 V to 3.6 V supply - no high-voltage programming is needed. This dual-voltage flexibility allows direct integration with 2.5 V or 3.3 V system rails without level-shifting, simplifying power design in mixed-voltage embedded systems.
Does the AT45DB161E-SHF2B-T support true read-while-write functionality?
Yes, the AT45DB161E-SHF2B-T implements true concurrent operation using two independent 512/528-byte SRAM buffers. While one buffer accepts incoming data via SPI, the other can simultaneously transfer content to main memory - enabling uninterrupted streaming write performance without host CPU intervention.
How does RapidS™ mode improve performance over standard SPI in the AT45DB161E-SHF2B-T?
RapidS™ mode in the AT45DB161E-SHF2B-T uses optimized command opcodes (0Bh/1Bh) and timing to achieve 85 MHz operation and 6 ns clock-to-output delay - more than double the throughput of legacy SPI flash at equivalent frequencies. It eliminates setup/hold overhead, enabling sustained high-speed continuous array reads.
What security mechanisms does the AT45DB161E-SHF2B-T provide for boot code protection?
The AT45DB161E-SHF2B-T provides hardware-enforced sector lockdown via a dedicated OTP register, making selected sectors permanently read-only. Combined with the WP pin and software-controlled sector protection, this ensures boot code cannot be altered - even under fault conditions or malicious firmware attacks.
Is the AT45DB161E-SHF2B-T pin-compatible with earlier AT45DB161D variants?
Yes, the AT45DB161E-SHF2B-T maintains identical pinout, package dimensions (8-lead SOIC, 0.208" wide), and electrical interface compatibility with AT45DB161D. Key enhancements - including RapidS™ timing, improved power-down current, and updated security features - are implemented without requiring PCB layout changes.
AT45DB161E-SHF2B-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 16Mbit
- Memory Organization:
- 512 Bytes x 4096 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 85 MHz
- Write Cycle Time - Word, Page:
- 8µs, 4ms
- Access Time:
- -
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT45DB161E-SHF2B-T FAQ
1.How can I place an order for AT45DB161E-SHF2B-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB161E-SHF2B-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-SHF2B-T reliable?
The price and inventory of AT45DB161E-SHF2B-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-SHF2B-T is usually 5 days.
3.What payment methods are accepted for AT45DB161E-SHF2B-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB161E-SHF2B-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB161E-SHF2B-T?
AT45DB161E-SHF2B-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB161E-SHF2B-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-SHF2B-T?
For technical support, including AT45DB161E-SHF2B-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB161E-SHF2B-T requirements.
6.How does Aetrix verify that AT45DB161E-SHF2B-T is sourced from the original manufacturer or authorized distributors?
All AT45DB161E-SHF2B-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-SHF2B-T meets industry standards.
7.What is the process for return or replacement of AT45DB161E-SHF2B-T?
All AT45DB161E-SHF2B-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB161E-SHF2B-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-SHF2B-T part is unused and in its original packaging.
Return procedure for AT45DB161E-SHF2B-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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