My Inquiry
My Account
Renesas AT45DQ161-SHD2B-T
- Part No.:
- AT45DQ161-SHD2B-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45DQ161-SHD2B-T.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,607
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT45DQ161-SHD2B-T from Renesas Electronics is a 16-Mbit serial Flash memory with SPI interface, Dual-I/O and Quad-I/O support, 85 MHz max clock frequency, 512/528-byte configurable page size, and two independent 512/528-byte SRAM buffers. It enables concurrent data reception and main memory reprogramming in embedded voice, firmware storage, and image buffering applications.
For engineers reviewing the AT45DQ161-SHD2B-T datasheet, AT45DQ161-SHD2B-T pinout, AT45DQ161-SHD2B-T application, or AT45DQ161-SHD2B-T equivalent, key selection criteria include SPI mode 0/3 compatibility, RapidS™ operation, ultra-deep power-down (500 nA), sector lockdown security, and DFN-8 (5 × 6 × 0.6 mm) packaging for space-constrained designs.
Technical Context
The AT45DQ161-SHD2B-T implements a dual-buffered architecture where two independent 512/528-byte SRAM buffers operate asynchronously with the 4,096-page main Flash array. It supports legacy SPI, Dual-I/O, and Quad-I/O read/write protocols with dedicated opcodes (e.g., 0Bh/6Bh for high-speed Quad-output reads).
Its command set includes buffer-to-main-memory page program with/without built-in erase, page/block/sector/chip erase, program/erase suspend/resume, and hardware/software sector protection. The device uses JEDEC-standard Manufacturer and Device ID (9Fh command) and features a 128-byte OTP Security Register with 64-byte factory-unique ID.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 16 Mbit (17,301,504 bits), organized as 4,096 pages of 512 or 528 bytes |
| Interface speed | 85 MHz max for SPI, Dual-I/O, and Quad-I/O modes; tV ≤ 6 ns clock-to-output |
| 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 |
| Power consumption | 500 nA ultra-deep power-down (typical); 25 µA standby (typical); 11 mA active read at 20 MHz |
| Endurance & retention | 100,000 program/erase cycles per page; 20-year data retention |
| Page size | User-configurable: 512 bytes (binary-aligned) or 528 bytes (DataFlash-compatible default) |
| Security features | Individual sector protection, permanent sector lockdown, 128-byte OTP Security Register (64-byte unique ID + 64-byte user-programmable) |
Pinout & Package
AT45DQ161-SHD2B-T is packaged in an 8-pad Ultra-thin DFN (5 × 6 × 0.6 mm) per JEDEC MO-229, RoHS-compliant and halide-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command/address/data transfer; must be deasserted between commands |
| SCK | Serial Clock | Input clock synchronizing all SPI operations; supports up to 85 MHz in RapidS™ mode |
| MOSI | Master Out Slave In | Serial input for commands, addresses, and write data; supports single/Dual/Quad-input modes |
| MISO | Master In Slave Out | Serial output for read data and status; supports single/Dual/Quad-output modes |
| WP | Write Protect | Hardware-enabled sector protection control; low = protection enabled per Sector Protection Register |
| RESET | Reset Input | Active-low hardware reset; initiates internal reset sequence and clears status register |
| HOLD | Hold Input | Active-low pause signal; suspends ongoing serial communication without losing internal state |
| VSS | Ground | Reference ground for all I/O and core circuitry; requires low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| Dual- and Quad-I/O operation | Enables 2× or 4× data throughput vs. standard SPI - critical for high-bandwidth firmware/image streaming |
| RapidS™ interface | Reduces instruction overhead and timing constraints; supports continuous high-frequency reads/writes without inter-byte delays |
| Interleaved buffer programming | Allows one SRAM buffer to accept new data while the other writes to Flash - eliminates write latency gaps in real-time logging |
| Flexible erase granularity | Page (512/528 B), block (4 kB), sector (128 kB), and chip (16 Mbit) erase options - optimizes wear leveling and firmware update efficiency |
| Hardware sector lockdown | Makes any sector permanently read-only after freeze command - prevents accidental or malicious overwrite of boot code or calibration data |
| Ultra-deep power-down mode | 500 nA typical current draw - extends battery life in always-on IoT edge nodes during extended idle periods |
Applications
| Industrial Firmware Storage | Medical Imaging Buffer |
|---|---|
|
Use Scenario: Storing and updating field-upgradable firmware in programmable logic controllers (PLCs) with secure rollback capability. IC Role / Device Role / Timing Role: Non-volatile program code storage with sector lockdown for bootloader region and suspend/resume for safe over-the-air updates. Use Value: 100,000-cycle endurance and 20-year retention ensure long-term reliability; Quad-I/O enables sub-second firmware load times. |
Use Scenario: Temporary frame buffering in portable ultrasound devices before DICOM transmission. IC Role / Device Role / Timing Role: High-speed sequential write buffer using interleaved SRAM buffers to absorb bursty image sensor data. Use Value: 85 MHz Quad-output read and 6 ns tV allow rapid frame retrieval; 528-byte page alignment matches common image packet sizes. |
| Smart Meter Data Logging | Automotive ADAS Boot Memory |
|
Use Scenario: Hourly energy consumption logging with tamper-resistant audit trail in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: Secure, low-power non-volatile storage with OTP Security Register for cryptographic keys and meter ID. Use Value: 500 nA ultra-deep power-down extends 10+ year battery life; sector lockdown protects regulatory compliance data. |
Use Scenario: Storing boot firmware and configuration parameters for radar ECU with ASIL-B functional safety requirements. IC Role / Device Role / Timing Role: Fast-read, high-reliability boot memory with hardware write protection and JEDEC ID verification at power-on. Use Value: RapidS™ mode ensures <100 ms boot time; 2.3 V min supply supports wide automotive battery range (9–16 V). |
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, 1.65–3.6 V supply, QPI/DTR support, no SRAM buffers, no RapidS™, 100 µA deep power-down | Lacks dual-buffer concurrency and ultra-low-power deep sleep; better suited for cost-sensitive, non-real-time firmware storage | Select when QPI interface or lower unit cost is prioritized over concurrent I/O and 500 nA power-down. |
| Macronix MX25L1633F | 16 Mbit, 2.3–3.6 V, no Dual/Quad-I/O, no SRAM buffers, 1 µA deep power-down, no sector lockdown | No interleaved buffering or hardware sector freeze; limited security model and higher deep-sleep current | Choose for legacy SPI-only systems where buffer concurrency and ultra-low-power sleep are not required. |
Compared with W25Q16JW and MX25L1633F, the AT45DQ161-SHD2B-T uniquely delivers simultaneous buffer write + Flash program, 500 nA deep power-down, and permanent sector lockdown - making it optimal for real-time, secure, battery-constrained embedded systems.
Availability
AT45DQ161-SHD2B-T is available at Aetrix Electronics and suitable for industrial firmware storage, medical imaging buffering, and smart meter data logging requiring stable component supply and long-term lifecycle support.
Supply support for AT45DQ161-SHD2B-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-SHD2B-T belongs to Renesas' DataFlash® family, designed specifically for high-reliability, low-power, and secure serial Flash applications demanding concurrent I/O, flexible erase, and hardware-enforced data integrity.
FAQ
What is the operating voltage range for the AT45DQ161-SHD2B-T?
The AT45DQ161-SHD2B-T operates from 2.3 V to 3.6 V on a single supply rail. This wide range allows direct integration with 2.5 V and 3.3 V system logic without external level-shifting circuitry, and supports brown-out resilience in battery-powered applications where voltage may dip below 2.5 V during peak load.
Does the AT45DQ161-SHD2B-T support true Quad-I/O operation?
Yes, the AT45DQ161-SHD2B-T supports true Quad-I/O for both read (6Bh opcode) and write (38h opcode) operations, enabling 4-bit-wide data transfers on the MISO/MOSI lines. This is confirmed in the datasheet's Section 5.1 and Figure 49–50 waveforms, delivering up to 4× bandwidth versus standard SPI mode.
How does the dual-SRAM buffer architecture improve system performance in the AT45DQ161-SHD2B-T?
The AT45DQ161-SHD2B-T integrates two independent 512/528-byte SRAM buffers that operate asynchronously with the main Flash array. While one buffer writes data to Flash, the other accepts new incoming data - eliminating write latency gaps. This enables seamless continuous data streaming in applications like audio recording or sensor logging.
Can the AT45DQ161-SHD2B-T be configured for 512-byte pages instead of the default 528-byte pages?
Yes, the AT45DQ161-SHD2B-T supports user-configurable page size via the Buffer and Page Size Configuration command (Table 25). It can be factory-set or field-programmed for either 512-byte (binary-aligned) or 528-byte (legacy DataFlash-compatible) pages - enabling optimization for memory-mapped access or legacy firmware compatibility.
What security mechanisms does the AT45DQ161-SHD2B-T provide beyond standard write protection?
The AT45DQ161-SHD2B-T provides hardware sector lockdown (permanent read-only lock), individual sector protection registers, and a 128-byte OTP Security Register with 64-byte factory-unique ID and 64-byte user-programmable space. These features enable cryptographic key storage, secure boot partitioning, and tamper-proof calibration data retention - exceeding basic WP pin functionality.
AT45DQ161-SHD2B-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm 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:
- 512 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-SHD2B-T FAQ
1.How can I place an order for AT45DQ161-SHD2B-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DQ161-SHD2B-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-SHD2B-T reliable?
The price and inventory of AT45DQ161-SHD2B-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-SHD2B-T is usually 5 days.
3.What payment methods are accepted for AT45DQ161-SHD2B-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DQ161-SHD2B-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DQ161-SHD2B-T?
AT45DQ161-SHD2B-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DQ161-SHD2B-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-SHD2B-T?
For technical support, including AT45DQ161-SHD2B-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DQ161-SHD2B-T requirements.
6.How does Aetrix verify that AT45DQ161-SHD2B-T is sourced from the original manufacturer or authorized distributors?
All AT45DQ161-SHD2B-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-SHD2B-T meets industry standards.
7.What is the process for return or replacement of AT45DQ161-SHD2B-T?
All AT45DQ161-SHD2B-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DQ161-SHD2B-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-SHD2B-T part is unused and in its original packaging.
Return procedure for AT45DQ161-SHD2B-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT45DQ161-SHD2B-T Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
