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Renesas AT45DB161E-SHF-B
- Part No.:
- AT45DB161E-SHF-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45DB161E-SHF-B.pdf
- Description:
- IC FLASH 16MBIT SPI 85MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:64,237
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Product details
Overview
AT45DB161E-SHF-B 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-SHF-B datasheet, AT45DB161E-SHF-B pinout, AT45DB161E-SHF-B application, or AT45DB161E-SHF-B equivalent, key selection criteria include its 85 MHz RapidS™ read speed, ultra-low 400 nA deep power-down current, factory-configurable 512-byte page mode, hardware/software sector protection, and dual-buffer interleaved programming capability.
Technical Context
The AT45DB161E-SHF-B implements a serial sequential-access Flash architecture with two independent SRAM buffers, enabling true background reprogramming: data can be loaded into one buffer while the other writes to main memory. Its RapidS™ mode uses optimized command sequences and reduced setup/hold timing to achieve 85 MHz clock rates without requiring external voltage boosting.
Memory organization supports flexible erase granularity-page (512/528 B), block (4 kB), sector (128 kB), or full chip (16 Mbit)-and includes suspend/resume for program/erase operations. Sector lockdown, OTP security register (128 B), and JEDEC-standard ID read provide robust data integrity and device authentication in field-deployed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 16 Mbit (2,097,152 bytes) main array + 512 kbit extra space; organized as 4,096 pages of 512 or 528 bytes |
| Interface & speed | SPI-compatible (modes 0 and 3); RapidS™ operation up to 85 MHz; legacy read at 15 MHz low-power mode |
| Supply voltage | Single 2.3 V–3.6 V or 2.5 V–3.6 V rail; no high-voltage programming required |
| Power consumption | 400 nA ultra-deep power-down (typical); 25 µA standby; 7 mA active read @15 MHz |
| Endurance & retention | 100,000 program/erase cycles per page minimum; 20-year data retention |
| Protection features | Individual sector protection + permanent lockdown; 128-byte OTP security register (64 B factory UID + 64 B user) |
Pinout & Package
AT45DB161E-SHF-B is packaged in an 8-lead SOIC (0.208" wide), with pin 1 marked by a notch or dot. All pins are CMOS-compatible and support standard SPI signaling.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; places SO in high-impedance when deasserted; initiates command decoding on falling edge |
| SCK | Serial Clock | Input; controls timing of SI/SO data transfer; supports up to 85 MHz in RapidS™ mode |
| SI | Serial Input | Input; receives commands, addresses, and data; latched on SCK rising edge (mode 0) or falling edge (mode 3) |
| SO | Serial Output | Output; returns status, IDs, and memory/buffer data; tri-stated when CS is high |
| WP | Write Protect | Active-low hardware lock; disables sector protection changes and write/erase commands when asserted |
| RESET | Hardware Reset | Active-low asynchronous reset; forces device into known state and clears internal status flags |
| VCC | Power Supply | 2.3–3.6 V main supply; powers core, I/O, and charge pump for erase/program |
| GND | Ground | Reference return path for VCC and all I/O signals; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM buffers (512/528 B each) | Enables continuous data streaming: one buffer accepts new data while the other programs main memory, eliminating write latency gaps |
| RapidS™ high-speed interface | Delivers 85 MHz read throughput via optimized command protocol-no external clock multiplier or voltage booster needed |
| User-configurable page size | Factory-set to 528-byte default or 512-byte binary mode; simplifies alignment for legacy systems or byte-addressable E²PROM emulation |
| Program/erase suspend/resume | Allows interrupting long erase/write operations to service time-critical reads or commands, then resuming from exact point |
| 128-byte OTP security register | Provides tamper-resistant storage: 64-byte factory-assigned unique ID + 64-byte user-programmable keys or calibration data |
Applications
| Firmware Storage in Industrial PLCs | Audio Buffering in VoIP Gateways |
|---|---|
Use Scenario: Storing and updating programmable logic controller firmware in harsh environments with limited board space and strict power budgets. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; handles boot image loading and field firmware upgrades over SPI. Use Value: Dual-buffer operation enables zero-downtime firmware patching; 400 nA deep power-down extends battery life during standby. |
Use Scenario: Capturing and buffering real-time voice packets in SIP-based VoIP gateways before compression or transmission. IC Role / Device Role / Timing Role: High-throughput sequential data buffer with deterministic latency; interfaces directly to DSP or audio codec via SPI. Use Value: RapidS™ 85 MHz read speed supports uninterrupted 16-bit stereo audio streaming; 512-byte page alignment matches common packet sizes. |
| E²PROM Emulation in Medical Sensors | Configuration Storage in Network Routers |
Use Scenario: Replacing discrete EEPROM in portable medical sensors requiring frequent parameter updates (e.g., calibration offsets, usage logs). IC Role / Device Role / Timing Role: Byte-alterable nonvolatile storage using built-in read-modify-write; retains data across power cycles without external HV circuitry. Use Value: Eliminates need for separate EEPROM; 100,000-cycle endurance meets clinical device lifetime requirements; sector lockdown prevents accidental overwrite of critical calibration data. |
Use Scenario: Storing router boot images, configuration files, and MAC address tables in carrier-grade edge routers with hot-swap capability. IC Role / Device Role / Timing Role: High-reliability system memory for fast boot and secure configuration backup; supports hardware write protection via WP pin. Use Value: Sector protection isolates boot code from user config partitions; JEDEC ID read enables automated BOM verification during manufacturing test. |
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 W25Q16JVS | 16 Mbit Quad SPI (QSPI) interface; no dual SRAM buffers; no RapidS™; max 133 MHz QSPI clock (vs. 85 MHz SPI) | Lacks concurrent read-while-write; requires QSPI controller; better suited for high-bandwidth code XIP than streaming data buffering | Choose W25Q16JVS only if system already uses QSPI and does not require background programming or low-power streaming |
| Microchip SST26VF016B | 16 Mbit octal DTR SPI; no SRAM buffers; supports 104 MHz DDR; includes hardware reset and enhanced security registers | No buffer-assisted streaming; higher pin count (8-pin SOIC vs. 8-pin SOIC but different pinout); deeper security model | Select SST26VF016B when advanced security (secure boot, encrypted writes) outweighs need for dual-buffer concurrency |
Compared with W25Q16JVS and SST26VF016B, the AT45DB161E-SHF-B uniquely delivers true read-while-write via dual SRAM buffers and RapidS™-optimized 85 MHz SPI-making it superior for continuous data logging, voice buffering, and E²PROM emulation where latency hiding and ultra-low standby current are critical.
Availability
AT45DB161E-SHF-B is available at Aetrix Electronics and suitable for industrial control firmware storage, medical sensor calibration logging, and VoIP audio buffering requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT45DB161E-SHF-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
Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT applications.
The AT45DB161E belongs to Renesas' DataFlash family-designed specifically for systems needing high-density serial Flash with integrated SRAM buffers to eliminate write bottlenecks in real-time data capture and firmware update scenarios.
FAQ
What is the default page size configuration for the AT45DB161E-SHF-B?
The AT45DB161E-SHF-B is factory configured for 528-byte pages-the standard DataFlash page size-which includes 512 bytes of user data plus 16 bytes of overhead. This setting supports legacy DataFlash compatibility and simplifies integration with existing drivers. The device also supports 512-byte binary mode via configuration command, but that requires explicit initialization after power-up.
Does the AT45DB161E-SHF-B support true concurrent read-while-write?
Yes-the AT45DB161E-SHF-B implements true concurrent operation using two independent 512/528-byte SRAM buffers. While one buffer is being written to main memory (page program), the other can simultaneously accept new data via SPI. This eliminates write latency in continuous streaming applications such as audio capture or sensor logging.
What is the purpose of the RapidS™ mode in the AT45DB161E-SHF-B?
RapidS™ is a proprietary high-speed SPI protocol extension in the AT45DB161E-SHF-B that reduces command overhead and tightens timing margins, enabling reliable 85 MHz read operation without external voltage boosters or special controllers. It uses opcodes 0Bh and 1Bh for high-frequency continuous reads and delivers ~2× throughput versus standard SPI mode at the same clock rate.
How does sector lockdown differ from standard sector protection in the AT45DB161E-SHF-B?
Sector lockdown in the AT45DB161E-SHF-B is a one-time irreversible operation that permanently disables all write/erase access to a selected sector-even if software protection bits are cleared or the WP pin is deasserted. Standard sector protection is software/hardware-toggled and reversible. Lockdown is used for immutable boot code or factory calibration data.
Can the AT45DB161E-SHF-B be used as a direct replacement for standard SPI NOR Flash devices?
No-the AT45DB161E-SHF-B is not a drop-in replacement for standard SPI NOR Flash due to its sequential-access architecture, page-based addressing, and dual-buffer command set. It requires driver-level changes to support DataFlash-specific opcodes (e.g., D2h for page read, D4h for buffer read) and lacks random-address read capability. Integration demands firmware adaptation, not just pin mapping.
AT45DB161E-SHF-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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, 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-SHF-B FAQ
1.How can I place an order for AT45DB161E-SHF-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB161E-SHF-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-SHF-B reliable?
The price and inventory of AT45DB161E-SHF-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-SHF-B is usually 5 days.
3.What payment methods are accepted for AT45DB161E-SHF-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB161E-SHF-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB161E-SHF-B?
AT45DB161E-SHF-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB161E-SHF-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-SHF-B?
For technical support, including AT45DB161E-SHF-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB161E-SHF-B requirements.
6.How does Aetrix verify that AT45DB161E-SHF-B is sourced from the original manufacturer or authorized distributors?
All AT45DB161E-SHF-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-SHF-B meets industry standards.
7.What is the process for return or replacement of AT45DB161E-SHF-B?
All AT45DB161E-SHF-B units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB161E-SHF-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-SHF-B part is unused and in its original packaging.
Return procedure for AT45DB161E-SHF-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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