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Renesas AT45DQ161-SSHF-B
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- Part No.:
- AT45DQ161-SSHF-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT45DQ161-SSHF-B.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,376
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Product details
Overview
AT45DQ161-SSHF-B from Renesas Electronics is a 16-Mbit serial DataFlash memory IC with SPI interface, Dual-I/O and Quad-I/O support, 512/528-byte configurable page size, 85 MHz max clock frequency, and ultra-low 500 nA deep power-down current. It serves as nonvolatile program/data storage in embedded controllers requiring high-speed sequential access and concurrent buffer operation.
For engineers reviewing the AT45DQ161-SSHF-B datasheet, AT45DQ161-SSHF-B pinout, AT45DQ161-SSHF-B application, or AT45DQ161-SSHF-B equivalent, key selection criteria include SPI mode 0/3 compatibility, dual/quad I/O read/write throughput, page-size configuration flexibility, sector-level hardware/software protection, and industrial-temperature-grade SOIC-8 packaging.
Technical Context
The AT45DQ161-SSHF-B implements a two-buffer architecture with independent 512/528-byte SRAM buffers enabling simultaneous data reception and main memory reprogramming. Its RapidS™ mode supports accelerated command execution and reduced latency for high-frequency SPI operations up to 85 MHz.
It supports four distinct erase granularities-page (512/528 B), block (4 kB), sector (128 kB), and chip (16 Mbit)-with suspend/resume capability during active program/erase cycles. Sector lockdown and OTP security register provide tamper-resistant firmware and identity management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 16 Mbit (2,097,152 bytes) organized as 4,096 pages of 512 or 528 bytes |
| Supply voltage | 2.3 V to 3.6 V single supply - enables direct interfacing with 2.5 V/3.3 V logic without level shifters |
| Max SPI clock frequency | 85 MHz - supports high-throughput firmware updates and streaming data logging |
| Page size option | User-configurable at order time: 512 bytes (binary-aligned) or 528 bytes (DataFlash-compatible) |
| Power-down current | 500 nA typical ultra-deep power-down - extends battery life in always-on sensor nodes |
| Data retention | 20 years at +85°C - ensures long-term reliability in industrial control firmware storage |
| Endurance | 100,000 program/erase cycles per page - supports frequent field-upgradeable applications |
Pinout & Package
AT45DQ161-SSHF-B uses an 8-lead 150-mil narrow SOIC package (JEDEC MS-012AA), RoHS-compliant, with 1.27 mm pitch and 5.3 mm × 4.4 mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command decoding; must be asserted before SCK edge to initiate transaction |
| SCK | Serial Clock | Input clock synchronized to SPI master; supports modes 0 and 3 with up to 85 MHz frequency |
| MOSI | Master Out Slave In | Serial input for commands, addresses, and write data; supports single/dual/quad-input buffer writes |
| MISO | Master In Slave Out | Serial output for read data and status; supports single/dual/quad-output reads with 6 ns tV |
| WP | Write Protect | Hardware-enabled sector protection override; low = enables write/erase lock on protected sectors |
| RESET | Hardware Reset | Active-low asynchronous reset; returns device to known state and exits deep power-down mode |
| VCC | Power Supply | 2.3–3.6 V supply; decoupling capacitor required within 10 mm of pin for stable high-speed operation |
| GND | Ground | Reference return path for all digital and analog functions; must be connected to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Dual/Quad-I/O Read & Write | Enables 2× or 4× bandwidth over standard SPI - reduces firmware update time by up to 75% vs. legacy SPI |
| Two independent SRAM buffers | Allows pipelined operation: receive new data into one buffer while programming previous buffer to flash array |
| Configurable page size | Factory-set 512-byte (binary-aligned) or 528-byte (legacy DataFlash) page - eliminates software translation layer |
| Individual sector lockdown | Makes any 128 kB sector permanently read-only after freeze command - prevents accidental or malicious overwrite |
| 128-byte OTP Security Register | Contains 64-byte factory-unique ID + 64-byte user-programmable space - enables secure boot key binding and device authentication |
Applications
| Firmware Storage in Microcontroller Systems | Industrial Data Logging |
|---|---|
Use Scenario: Storing bootloader, application firmware, and configuration tables for ARM Cortex-M microcontrollers in PLCs and motor drives. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast Quad-I/O read access and page-erase granularity for partial updates. Use Value: Enables field firmware upgrades without full chip erase; 85 MHz read speed reduces boot time by >40% vs. standard SPI Flash. |
Use Scenario: Continuous timestamped sensor data capture in environmental monitoring gateways operating on battery or energy harvesting. IC Role / Device Role / Timing Role: High-endurance sequential write buffer with ultra-low 500 nA deep power-down current. Use Value: Supports >100,000 write cycles per page and 20-year data retention at +85°C - critical for unattended remote deployments. |
| Secure Boot Key Storage | Medical Device Configuration Memory |
Use Scenario: Storing cryptographic keys and signed firmware hashes in Class II medical imaging equipment requiring FDA traceability. IC Role / Device Role / Timing Role: Tamper-resistant OTP security register with factory-programmed unique ID and user-lockable sector lockdown. Use Value: Prevents unauthorized firmware modification via permanent sector lockdown - satisfies IEC 62304 security requirements. |
Use Scenario: Retaining calibration coefficients, patient history, and regulatory compliance settings across power cycles in portable ultrasound units. IC Role / Device Role / Timing Role: Reliable, radiation-tolerant nonvolatile memory with individual sector protection for safety-critical parameters. Use Value: Sector-level hardware/software write protection ensures calibration data integrity - avoids recalibration downtime in clinical use. |
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 SPI NOR Flash; no SRAM buffers; supports octal DTR mode but lacks Dual/Quad-I/O interleaving | Lacks concurrent buffer operation and RapidS™ acceleration - unsuitable for real-time streaming write workloads | Choose for cost-sensitive designs where firmware read speed dominates over write concurrency |
| Macronix MX25L1633F | 16 Mbit SPI NOR Flash; 3.3 V only; no OTP register or sector lockdown; 100 µA standby current vs. 25 µA | No hardware-based sector lockdown or factory-unique ID - insufficient for secure boot or device identity requirements | Choose when industrial temperature range and ultra-low power are not required, and security features are handled externally |
Compared with Winbond W25Q16JW and Macronix MX25L1633F, AT45DQ161-SSHF-B uniquely delivers concurrent buffer write capability, factory-programmed UID, and permanent sector lockdown - making it the only option among the three qualified for secure, streaming-capable embedded firmware storage.
Availability
AT45DQ161-SSHF-B is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, and battery-powered IoT edge devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT45DQ161-SSHF-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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, with strong IP in microcontrollers, analog, and memory technologies.
AT45DQ161-SSHF-B belongs to Renesas' DataFlash family, designed specifically for high-reliability, high-speed sequential-access storage in resource-constrained embedded systems requiring concurrent read/write and robust data protection.
FAQ
What is the default page size configuration for AT45DQ161-SSHF-B?
The AT45DQ161-SSHF-B is ordered pre-configured with either 512-byte or 528-byte page size; the -SSHF-B suffix indicates the 150-mil SOIC package but does not encode page size. Per datasheet DS-AT45DQ161-8790 Rev. H, page size is set at manufacturing and cannot be changed in-system. Confirm page size via ordering code or configuration register read (0x35h).
Does AT45DQ161-SSHF-B support true Quad-SPI (QSPI) protocol with 4-line address/command phase?
No. AT45DQ161-SSHF-B supports Quad-output and Quad-input data transfers only - not full QSPI with quad-addressing. Commands and addresses remain single-bit; only data I/O occurs on four lines during Quad-I/O read/write operations, as defined in Section 5.1 and Table 30 of the datasheet.
Can AT45DQ161-SSHF-B replace legacy AT45DB161D in existing designs?
Yes, with minor firmware adaptation. AT45DQ161-SSHF-B maintains pin-to-pin compatibility and identical SOIC-8 footprint with AT45DB161D, and supports all legacy DataFlash commands. However, RapidS™ mode and Quad-enable sequence require updated driver initialization - refer to Sections 22 and 17.1 of DS-AT45DQ161-8790.
How is the 128-byte Security Register accessed on AT45DQ161-SSHF-B?
The 128-byte Security Register in AT45DQ161-SSHF-B is accessed using opcode 0x77 (Read Security Register) and 0x9B (Program Security Register). The first 64 bytes are factory-programmed with a unique identifier and locked against overwrite; the remaining 64 bytes are user-programmable and protected by WP pin state and sector protection bits.
What is the maximum operating temperature rating for AT45DQ161-SSHF-B?
AT45DQ161-SSHF-B is rated for the full industrial temperature range of –40°C to +85°C, as confirmed in Section 19.2 (DC and AC Operating Range) of DS-AT45DQ161-8790 Rev. H. An extended temperature option (–40°C to +105°C) is available under different part numbering - not applicable to the -SSHF-B variant.
AT45DQ161-SSHF-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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 - Quad I/O
- Clock Frequency:
- 85 MHz
- Write Cycle Time - Word, Page:
- 8µs, 6ms
- 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
AT45DQ161-SSHF-B FAQ
1.How can I place an order for AT45DQ161-SSHF-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DQ161-SSHF-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 AT45DQ161-SSHF-B reliable?
The price and inventory of AT45DQ161-SSHF-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DQ161-SSHF-B is usually 5 days.
3.What payment methods are accepted for AT45DQ161-SSHF-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DQ161-SSHF-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DQ161-SSHF-B?
AT45DQ161-SSHF-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DQ161-SSHF-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 AT45DQ161-SSHF-B?
For technical support, including AT45DQ161-SSHF-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DQ161-SSHF-B requirements.
6.How does Aetrix verify that AT45DQ161-SSHF-B is sourced from the original manufacturer or authorized distributors?
All AT45DQ161-SSHF-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 AT45DQ161-SSHF-B meets industry standards.
7.What is the process for return or replacement of AT45DQ161-SSHF-B?
All AT45DQ161-SSHF-B units undergo pre-shipment inspection (PSI). If there is an issue with AT45DQ161-SSHF-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 AT45DQ161-SSHF-B part is unused and in its original packaging.
Return procedure for AT45DQ161-SSHF-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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