Renesas AT45DQ161-SHF-T

Overview

AT45DQ161-SHF-T 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 storage for firmware, voice, image, and configuration data in resource-constrained embedded systems.

For engineers reviewing the AT45DQ161-SHF-T datasheet, AT45DQ161-SHF-T pinout, AT45DQ161-SHF-T application, or AT45DQ161-SHF-T equivalent, key selection criteria include SPI mode 0/3 compatibility, buffer-to-memory program suspend/resume capability, sector lockdown security, OTP security register, and industrial-temperature-rated 8-pad DFN (5 × 6 × 0.6 mm) packaging.

Technical Context

The AT45DQ161-SHF-T implements a dual-buffered architecture with two independent 512/528-byte SRAM buffers enabling concurrent read/write operations-data can be loaded into one buffer while the other transfers to main memory. Its RapidS™ mode supports high-speed bit-level access with 6 ns clock-to-output timing.

It supports four erase granularities (page/4 kB block/128 kB sector/chip), programmable sector protection, hardware/software reset, and JEDEC-standard manufacturer/device ID read. The device uses standard SPI opcodes extended for Dual/Quad I/O and includes dedicated commands for buffer management, auto page rewrite, and security register access.

Key Specifications

Pinout & Package

AT45DQ161-SHF-T is supplied in an 8-pad Ultra-thin DFN package (5 mm × 6 mm × 0.6 mm), RoHS-compliant and halide-free. This compact, thermally enhanced surface-mount package supports automated assembly and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial flash memory applications.

Compared with W25Q16JW and MX25L1633F, the AT45DQ161-SHF-T uniquely combines dual-SRAM buffering, RapidS timing, OTP security, and sector lockdown - making it the only choice for systems requiring simultaneous streaming, deterministic latency, and hardware-rooted trust.

Availability

AT45DQ161-SHF-T is available at Aetrix Electronics and suitable for firmware storage, voice/data logging, and industrial HMI configuration requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AT45DQ161-SHF-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-SHF-T belongs to Renesas' DataFlash family, engineered specifically for high-reliability, low-power, and feature-rich serial flash applications where concurrent operation, security, and industrial temperature resilience are mandatory.

FAQ

What is the default page size configuration for AT45DQ161-SHF-T?

The AT45DQ161-SHF-T ships with a default page size of 528 bytes, aligned to the legacy DataFlash format. However, it can be factory pre-configured to 512 bytes (binary-aligned) upon order - confirmed in Table 37 of DS-AT45DQ161-8790 Rev. H. Both configurations are fully supported in-system via the Buffer and Page Size Configuration command set.

Does AT45DQ161-SHF-T support true Quad SPI (QSPI) protocol compliance?

AT45DQ161-SHF-T supports Quad-output and Quad-input operations using standard SPI opcodes extended for multi-line mode (e.g., 0x6B for Quad Read), but it does not implement the JEDEC JESD216 QSPI x4 command set or octal DTR modes. Its Quad-I/O is proprietary to the DataFlash architecture and requires Renesas-specific driver support - not drop-in compatible with generic QSPI controllers.

How is the 128-byte Security Register structured in AT45DQ161-SHF-T?

The AT45DQ161-SHF-T Security Register is 128 bytes total: bytes 0–63 are factory-programmed with a unique 64-byte identifier (e.g., serial number or wafer lot trace), and bytes 64–127 are user-programmable. Access requires the 0x77 opcode and proper status register readiness; write protection is enforced by the sector lockdown mechanism once frozen.

Can AT45DQ161-SHF-T perform page erases while a buffer read is active?

No - AT45DQ161-SHF-T does not permit overlapping erase and buffer read operations. Per Table 5 ("Operations Allowed and Not Allowed During Suspend"), only program and erase operations may be suspended; buffer reads are blocked during active erase. Concurrent operations are limited to buffer write + main memory program (via suspend/resume), not erase + read.

What package variant does the "-SHF-T" suffix indicate for AT45DQ161-SHF-T?

The "-SHF-T" suffix denotes the 8-pad Ultra-thin DFN package (5 mm × 6 mm × 0.6 mm), green/RoHS-compliant, tape-and-reel packaging. This is distinct from "-SU" (150-mil SOIC) and "-SW" (208-mil SOIC) variants. Pinout and thermal characteristics are documented in Section 29.3 of DS-AT45DQ161-8790 Rev. H.