Renesas AT45DB161E-SSHFHC-T

Overview

AT45DB161E-SSHFHC-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 targets embedded firmware storage, voice/image buffering, and E²PROM emulation in space-constrained industrial controllers.

For engineers reviewing the AT45DB161E-SSHFHC-T datasheet, AT45DB161E-SSHFHC-T pinout, AT45DB161E-SSHFHC-T application, or AT45DB161E-SSHFHC-T equivalent, key selection criteria include SPI timing compliance (tV ≤ 6 ns), ultra-low deep power-down current (400 nA typ), sector lockdown security, and buffer-to-main-memory program flexibility for real-time data logging systems.

Technical Context

The AT45DB161E-SSHFHC-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 supports high-frequency continuous array reads using opcodes 0Bh and 1Bh, achieving up to 85 MHz clock rates with sub-6 ns clock-to-output timing.

It supports four 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 protection is implemented via hardware WP pin control and software-configurable registers, including permanent lockdown of individual sectors using a dedicated command set.

Key Specifications

Pinout & Package

AT45DB161E-SSHFHC-T uses an 8-lead SOIC package (0.208" wide, JEDEC MS-012AC), with lead finish Pb/Halide-free and RoHS-compliant construction. Pin 1 is marked with a dot or bevel; the package is moisture-sensitive level 3 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q16JVSNIQ and MX25L1606EM2I-12G, the AT45DB161E-SSHFHC-T uniquely delivers dual-buffer concurrency, RapidS™ acceleration, and hardware-enforced sector lockdown - making it optimal for real-time embedded systems demanding both performance and tamper resistance.

Availability

AT45DB161E-SSHFHC-T is available at Aetrix Electronics and suitable for industrial control firmware storage, battery-powered data loggers, voice-enabled medical devices, and automotive calibration storage requiring stable component supply and long-term lifecycle support.

Supply support for AT45DB161E-SSHFHC-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 markets.

The AT45DB161E-SSHFHC-T belongs to Renesas' DataFlash family, designed specifically for systems needing high-speed sequential access, low-voltage operation, and integrated SRAM buffers to replace parallel Flash or discrete EEPROM+RAM combinations.

FAQ

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

The AT45DB161E-SSHFHC-T supports up to 85 MHz in RapidS™ high-frequency continuous read mode (opcodes 0Bh and 1Bh). This exceeds standard SPI timing limits and enables sustained read throughput above 10 MB/s. The device also supports lower-speed modes (e.g., 15 MHz low-power read) and maintains full compatibility with SPI modes 0 and 3 across all frequencies. AT45DB161E-SSHFHC-T's tV ≤ 6 ns clock-to-output ensures timing margin compliance even at maximum speed.

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

Yes, the AT45DB161E-SSHFHC-T supports true concurrency via its two independent 512/528-byte SRAM buffers. While one buffer accepts incoming data via SPI, the other can simultaneously transfer its contents to main memory - eliminating write stalls during continuous data streams. This interleaving is fundamental to AT45DB161E-SSHFHC-T's design for real-time logging and voice buffering. No external arbitration or timing management is required.

How does sector lockdown work on the AT45DB161E-SSHFHC-T, and is it reversible?

Sector lockdown on the AT45DB161E-SSHFHC-T is a one-time programmable (OTP) security feature that permanently disables write/erase access to selected sectors. Once activated via the Sector Lockdown command (opcode 3AH), the protection cannot be cleared or reversed. The AT45DB161E-SSHFHC-T includes dedicated registers to track locked sectors, and the lockdown status persists through power cycles and resets. This ensures boot code or calibration data remains immutable - a key requirement for AT45DB161E-SSHFHC-T in safety-critical applications.

What page size options does the AT45DB161E-SSHFHC-T support, and how are they configured?

The AT45DB161E-SSHFHC-T supports two page sizes: 512 bytes (binary-aligned) and 528 bytes (standard DataFlash format), with 528 bytes as the factory default. Configuration is performed via the Buffer and Page Size Configuration command (opcode 3Dh) and takes effect after power-on reset. The choice impacts address mapping and compatibility with legacy firmware tools - 512-byte pages simplify integration with systems expecting power-of-two boundaries, while 528-byte pages retain backward compatibility with earlier DataFlash devices. Both configurations are fully supported by AT45DB161E-SSHFHC-T's command set.

What is the purpose of the 128-byte Security Register in the AT45DB161E-SSHFHC-T?

The 128-byte Security Register in the AT45DB161E-SSHFHC-T comprises 64 bytes of factory-programmed unique identifier (for device authentication and traceability) and 64 bytes of user-programmable space (for keys, certificates, or custom security metadata). It is accessed via dedicated opcodes (77h read, 78h program) and protected against accidental overwrite. This register enables secure boot verification, anti-cloning measures, and cryptographic binding - capabilities intrinsic to AT45DB161E-SSHFHC-T's role in trusted embedded systems.