Renesas AT45DB161E-SSHFHA-T

Overview

AT45DB161E-SSHFHA-T 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/write operations. It operates from a single 2.3–3.6 V supply and supports industrial temperature range (−40°C to +85°C), targeting embedded firmware storage and real-time data logging in space-constrained systems.

For engineers reviewing the AT45DB161E-SSHFHA-T datasheet, AT45DB161E-SSHFHA-T pinout, AT45DB161E-SSHFHA-T application, or AT45DB161E-SSHFHA-T equivalent, key selection criteria include its 85 MHz RapidS™ read speed, ultra-low 400 nA deep power-down current, user-configurable page size (512 vs. 528 bytes), hardware/software sector protection, and 128-byte OTP security register for secure boot and device identity.

Technical Context

The AT45DB161E-SSHFHA-T implements a sequential-access Flash architecture with two independent SRAM buffers, enabling true interleaved programming: one buffer receives new data while the other transfers content to main memory. Its RapidS™ mode uses optimized command sequences and timing to achieve 85 MHz clock rates without requiring external timing components.

It supports multiple erase granularities-page (512/528 B), block (4 kB), sector (128 kB), and chip-wide-with suspend/resume capability during active program/erase cycles. Sector lockdown and 128-byte OTP Security Register provide hardware-enforced write protection and unique device identification.

Key Specifications

Pinout & Package

AT45DB161E-SSHFHA-T is packaged in an 8-pad Ultra-thin DFN (5 mm × 6 mm × 0.6 mm) with exposed thermal pad (non-connected or GND-tied). Pin count and layout match JEDEC-standard SOIC-8 footprint for board-level compatibility across variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q16JVSNIQ and SST26VF016B-104V/SN, the AT45DB161E-SSHFHA-T uniquely delivers concurrent buffer streaming, hardware-enforced sector lockdown, and 400 nA deep power-down-making it optimal for secure, battery-powered, real-time embedded systems requiring both high write throughput and long-term reliability.

Availability

AT45DB161E-SSHFHA-T is available at Aetrix Electronics and suitable for firmware storage, real-time data logging, secure boot authentication, and embedded E2PROM emulation requiring stable component supply across industrial, medical, and IoT production programs.

Supply support for AT45DB161E-SSHFHA-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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, with strong IP in Flash memory, MCUs, and analog mixed-signal products.

The AT45DB161E-SSHFHA-T belongs to Renesas' DataFlash family-designed specifically for systems needing high-reliability, low-pin-count, low-voltage serial Flash with integrated SRAM buffers and advanced security features for secure firmware and data handling.

FAQ

What is the maximum operating frequency of the AT45DB161E-SSHFHA-T in RapidS™ mode?

The AT45DB161E-SSHFHA-T supports up to 85 MHz in RapidS™ mode, enabling high-speed continuous read operations with minimal latency. This frequency is validated under 2.3–3.6 V supply and industrial temperature conditions. The device also offers lower-power read modes (e.g., 15 MHz) with reduced current consumption, making the AT45DB161E-SSHFHA-T adaptable to both performance-critical and energy-sensitive designs.

Does the AT45DB161E-SSHFHA-T support true concurrent read and write operations?

Yes-the AT45DB161E-SSHFHA-T implements two fully independent 512/528-byte SRAM buffers that allow simultaneous data reception into one buffer while programming the main Flash array from the other. This interleaving capability enables uninterrupted data streaming, which is essential for real-time logging and firmware update scenarios where the AT45DB161E-SSHFHA-T serves as both buffer and persistent storage.

How does the AT45DB161E-SSHFHA-T handle power-down states, and what is its lowest quiescent current?

The AT45DB161E-SSHFHA-T offers two ultra-low-power states: Deep Power-Down (5 µA typical) and Ultra-Deep Power-Down (400 nA typical). Entry is controlled via dedicated commands, and resume requires only CS assertion and clock pulses-no full reset. This makes the AT45DB161E-SSHFHA-T ideal for battery-powered edge sensors and wearables where multi-year operation is required between charges.

Can the AT45DB161E-SSHFHA-T emulate byte-alterable E2PROM, and how is it implemented?

Yes-the AT45DB161E-SSHFHA-T supports E2PROM emulation via a self-contained three-step read-modify-write operation using its SRAM buffers. A page is first loaded into a buffer, modified at byte level, then written back to Flash. No external controller logic is needed, and the AT45DB161E-SSHFHA-T guarantees atomicity and integrity throughout the sequence, making it suitable for parameter storage in programmable logic controllers and smart meters.

What security features does the AT45DB161E-SSHFHA-T provide beyond standard write protection?

Beyond software/hardware sector protection, the AT45DB161E-SSHFHA-T includes a 128-byte One-Time Programmable (OTP) Security Register-64 bytes factory-programmed with a unique identifier and 64 bytes user-programmable-and hardware sector lockdown that permanently disables writes to selected sectors. These features enable secure boot validation, device authentication, and tamper-resistant firmware signing, distinguishing the AT45DB161E-SSHFHA-T from generic SPI Flash devices.