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Renesas AT45DQ161-SSHD-T
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- Part No.:
- AT45DQ161-SSHD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT45DQ161-SSHD-T.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,947
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Product details
Overview
AT45DQ161-SSHD-T from Renesas Electronics is a 16-Mbit serial DataFlash memory IC with SPI interface, supporting Dual-I/O and Quad-I/O modes up to 85 MHz, 512/528-byte configurable page size, two independent 512/528-byte SRAM buffers, and ultra-low 500 nA deep power-down current. It enables high-throughput firmware storage and real-time data logging in space-constrained embedded systems.
For engineers reviewing the AT45DQ161-SSHD-T datasheet, AT45DQ161-SSHD-T pinout, AT45DQ161-SSHD-T application, or AT45DQ161-SSHD-T equivalent, key selection criteria include SPI mode 0/3 compatibility, RapidS™ timing support, buffer-to-memory program suspend/resume capability, sector lockdown security, and 8-pin SOIC (150-mil) package fit for industrial control and portable medical devices.
Technical Context
The AT45DQ161-SSHD-T implements a dual-buffered architecture where two independent SRAM buffers (each sized to match the selected page size-512 or 528 bytes) operate concurrently with main memory programming. This enables true background write: one buffer accepts incoming SPI data while the other transfers content to flash, eliminating write latency stalls.
Its command set supports multiple I/O configurations-including legacy single-bit SPI, Dual-I/O (2-bit data bus), and Quad-I/O (4-bit data bus)-with dedicated opcodes for continuous array read (0Bh/03h), dual-output read (3Bh), quad-output read (6Bh), buffer write (84h), and buffer-to-main-memory page program (83h). Clock-to-output time is specified at ≤6 ns, enabling tight timing margins in high-speed microcontroller interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 16 Mbit (2,097,152 bytes), organized as 4,096 pages × 512 or 528 bytes |
| Supply voltage | 2.3 V to 3.6 V - compatible with 2.5 V and 3.3 V logic domains without level shifting |
| Max clock frequency | 85 MHz for SPI, Dual-I/O, and Quad-I/O - enables >34 MB/s effective throughput in Quad-I/O mode |
| Page size | User-configurable: 512 bytes (binary-aligned) or 528 bytes (DataFlash standard); factory pre-set per order |
| Power-down current | 500 nA typical in Ultra-Deep Power-Down - extends battery life in always-on sensor nodes |
| Endurance & retention | 100,000 program/erase cycles per page; 20-year data retention at industrial temperature range |
| Security features | 128-byte OTP Security Register (64-byte factory UID + 64-byte user-programmable); sector lockdown for permanent read-only protection |
Pinout & Package
AT45DQ161-SSHD-T is packaged in an 8-lead 150-mil narrow SOIC (SOIC-8, JEDEC MS-012AA), with lead finish Pb/Halide-free and RoHS compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command decoding; must be asserted before SCK edge to initiate valid transaction |
| SCK | Serial Clock | Input clock synchronized to SPI master; supports modes 0 and 3 (CPOL=0/1, CPHA=0/1) |
| MOSI | Master Out, Slave In | Serial data input for commands, addresses, and write data; supports single/Dual/Quad-input modes |
| MISO | Master In, Slave Out | Serial data output for read operations; supports single/Dual/Quad-output modes with configurable drive strength |
| WP | Write Protect | Hardware-enabled sector protection override; low = enables write/erase lock on protected sectors |
| RESET | Hardware Reset | Active-low asynchronous reset; forces device into known state and clears status register flags |
| VCC | Power Supply | 2.3–3.6 V supply; decoupling capacitor required within 10 mm of pin for stable high-frequency operation |
| GND | Ground | Reference return path for all digital and analog circuitry; separate ground plane recommended for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| RapidS™ high-speed interface | Reduces clock-to-output delay to ≤6 ns, enabling deterministic timing for real-time firmware fetch in MCU boot loaders |
| Dual/Quad-I/O support | Doubles or quadruples effective data rate over standard SPI - e.g., 85 MHz × 4 bits = 340 Mbps theoretical bandwidth |
| Two independent SRAM buffers | Enables pipelined writes: one buffer receives new data while the other programs flash, eliminating write blocking in streaming applications |
| Program/Erase Suspend & Resume | Allows interrupting long erase (e.g., sector/sector) or program operations to service higher-priority reads or commands |
| Configurable page size (512/528 B) | Supports both binary-aligned addressing (512 B) and legacy DataFlash compatibility (528 B), simplifying migration from older AT45DB parts |
| 128-byte OTP Security Register | Provides tamper-resistant storage for cryptographic keys or device identity; factory-programmed 64-byte UID ensures unique traceability |
Applications
| Firmware Storage | Data Logging |
|---|---|
|
Use Scenario: Storing boot code and application firmware for ARM Cortex-M microcontrollers in industrial gateways. IC Role / Device Role / Timing Role: Non-volatile serial Flash memory providing XIP-capable or copy-to-RAM boot image storage with rapid sequential read access. Use Value: 85 MHz Quad-I/O read speed reduces boot time by >40% vs. standard SPI Flash; 528-byte page aligns with legacy bootloader expectations. |
Use Scenario: Continuous timestamped sensor data capture in battery-powered environmental monitors. IC Role / Device Role / Timing Role: High-endurance sequential write buffer with background reprogramming to sustain 100 kB/s sustained logging. Use Value: Dual-buffer interleaving allows uninterrupted data ingestion during flash page programming; 500 nA ultra-deep power-down extends 10-year battery life. |
| Secure Configuration Storage | Medical Device Parameter Retention |
|
Use Scenario: Storing calibrated sensor coefficients and encrypted calibration keys in diagnostic imaging equipment. IC Role / Device Role / Timing Role: Secure non-volatile storage with hardware write protection and permanent sector lockdown for regulatory compliance. Use Value: Sector lockdown prevents field modification of critical calibration data; 128-byte OTP register stores asymmetric key material resistant to physical extraction. |
Use Scenario: Retaining patient-specific therapy parameters and usage history across power cycles in portable infusion pumps. IC Role / Device Role / Timing Role: Reliable, low-power, high-retention memory for FDA-critical configuration and audit log storage. Use Value: 20-year data retention and 100,000-cycle endurance meet IEC 62304 Class C requirements; industrial temp rating supports sterilization cycles. |
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 NOR Flash; no SRAM buffers; lacks RapidS™ timing; 1.65–3.6 V supply | Lower-cost firmware storage where concurrent buffer operation is unnecessary; no E2PROM emulation support | Select when system uses standard QSPI controller without custom buffer management firmware |
| Microchip SST26VF016B | 16-Mbit Quad SPI Flash with 128-byte security register but no dual-SRAM buffers; supports 100 MHz clock | Higher-speed boot loading where background write is not required; no page-size configurability | Prefer for automotive infotainment boot ROM where AEC-Q100 qualification is mandatory |
Compared with W25Q16JW and SST26VF016B, AT45DQ161-SSHD-T uniquely delivers dual-SRAM buffering for zero-latency streaming writes, RapidS™ sub-6 ns timing for deterministic boot, and factory-configurable 512/528-byte pages-making it optimal for real-time data acquisition and secure firmware update architectures.
Availability
AT45DQ161-SSHD-T is available at Aetrix Electronics and suitable for industrial control, portable medical devices, and IoT edge node designs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT45DQ161-SSHD-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 IoT applications.
The AT45DQ161 belongs to Renesas' DataFlash family, engineered specifically for high-reliability, low-power, sequential-access storage in resource-constrained embedded systems requiring fast program/erase and robust security.
FAQ
What is the default page size configured for AT45DQ161-SSHD-T?
The AT45DQ161-SSHD-T is factory pre-configured to use the 528-byte page size by default, matching the legacy DataFlash standard. However, it supports field reconfiguration to 512-byte pages via the Buffer and Page Size Configuration command (0x3D), and the device can be ordered with either option at manufacturing. The selected size affects address mapping and buffer alignment in AT45DQ161-SSHD-T firmware drivers.
Does AT45DQ161-SSHD-T support true Quad-I/O for both read and write operations?
Yes, AT45DQ161-SSHD-T supports Quad-I/O for read operations (using opcode 0x6B) and Dual-I/O for write operations (using opcode 0xA4). It does not support Quad-I/O writes. The device uses separate opcodes and timing sequences for each I/O mode, and Quad Enable must be set via the Configuration Register (0x35) before issuing Quad-I/O commands. This distinction is explicitly defined in the AT45DQ161-SSHD-T datasheet Section 5.1 and Table 30.
How does the Program/Erase Suspend feature work in AT45DQ161-SSHD-T?
AT45DQ161-SSHD-T allows suspending active page program or sector/sector erase operations using the Program/Erase Suspend command (0x75). Once suspended, the device responds to status register reads and short-duration commands (e.g., buffer reads), enabling time-critical foreground tasks. Resumption uses the Program/Erase Resume command (0x7A). This capability is confirmed in AT45DQ161-SSHD-T datasheet Sections 7.12–7.13 and Table 5, which lists allowed operations during suspend.
Can AT45DQ161-SSHD-T be used as EEPROM emulation memory?
Yes, AT45DQ161-SSHD-T supports EEPROM emulation through its flexible byte/page programming and dual-buffer architecture. By managing wear leveling and atomic updates in firmware-leveraging buffer-to-memory transfers and suspend/resume-the device emulates byte-alterable storage. The AT45DQ161-SSHD-T datasheet explicitly references E2PROM emulation in the Product Overview (page 7) and Section 24, confirming this use case is architecturally supported.
What is the purpose of the 128-byte Security Register in AT45DQ161-SSHD-T?
The 128-byte Security Register in AT45DQ161-SSHD-T comprises two 64-byte sections: the first is factory-programmed with a unique 64-byte identifier for device traceability, and the second is user-programmable for keys, certificates, or secure configuration. It is one-time programmable (OTP) and protected against overwrite after programming. This register is accessed via dedicated opcodes (0x77 for read, 0x9B for program) and is detailed in AT45DQ161-SSHD-T datasheet Section 9.2 and Table 19.
AT45DQ161-SSHD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 2.5V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT45DQ161-SSHD-T FAQ
1.How can I place an order for AT45DQ161-SSHD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DQ161-SSHD-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 AT45DQ161-SSHD-T reliable?
The price and inventory of AT45DQ161-SSHD-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DQ161-SSHD-T is usually 5 days.
3.What payment methods are accepted for AT45DQ161-SSHD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DQ161-SSHD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DQ161-SSHD-T?
AT45DQ161-SSHD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DQ161-SSHD-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 AT45DQ161-SSHD-T?
For technical support, including AT45DQ161-SSHD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DQ161-SSHD-T requirements.
6.How does Aetrix verify that AT45DQ161-SSHD-T is sourced from the original manufacturer or authorized distributors?
All AT45DQ161-SSHD-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 AT45DQ161-SSHD-T meets industry standards.
7.What is the process for return or replacement of AT45DQ161-SSHD-T?
All AT45DQ161-SSHD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DQ161-SSHD-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 AT45DQ161-SSHD-T part is unused and in its original packaging.
Return procedure for AT45DQ161-SSHD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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