Renesas AT45DB161E-MHD-T

Overview

AT45DB161E-MHD-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-while-write. 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-MHD-T datasheet, AT45DB161E-MHD-T pinout, AT45DB161E-MHD-T application, or AT45DB161E-MHD-T equivalent, key selection criteria include page size configurability (512 vs. 528 bytes), ultra-low deep power-down current (400 nA typical), hardware/software sector protection, 128-byte OTP security register, and support for suspend/resume during program/erase operations.

Technical Context

The AT45DB161E-MHD-T implements a sequential-access Flash architecture with two independent SRAM buffers, enabling true interleaved write operations: while one buffer receives incoming data via SPI, the other transfers content to main memory-eliminating write latency bottlenecks in continuous streaming applications. Its RapidS™ mode delivers 85 MHz clock rates with 6 ns clock-to-output timing, significantly exceeding standard SPI Flash performance.

Memory organization supports flexible erase granularity: page (512/528 B), block (4 kB), sector (128 kB), and full chip (16 Mbits), all with built-in self-timed execution. Sector lockdown and individual sector protection are enforced via dedicated registers and hardware WP pin control, meeting industrial data integrity requirements across −40°C to +85°C.

Key Specifications

Pinout & Package

AT45DB161E-MHD-T uses an 8-lead SOIC package (0.208" wide, JEDEC MS-012AC), with pins arranged in standard dual-inline configuration. All signals comply with SPI protocol timing and voltage levels for direct microcontroller interfacing without level-shifting.

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-MHD-T uniquely delivers dual-SRAM-buffered read-while-write, hardware-enforced sector lockdown, and RapidS™-accelerated throughput - making it the only option among the three that natively supports deterministic real-time streaming and secure boot partitioning without external logic.

Availability

AT45DB161E-MHD-T is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, VoIP infrastructure, and network equipment requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for AT45DB161E-MHD-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 microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT applications.

The AT45DB161E belongs to Renesas' DataFlash family, designed specifically for high-reliability, low-pin-count serial memory applications demanding concurrent access, robust data protection, and seamless integration into resource-constrained embedded systems.

FAQ

What is the default page size configuration for the AT45DB161E-MHD-T?

The AT45DB161E-MHD-T ships with a default page size of 528 bytes, but it can be factory pre-configured for 512-byte pages. The selected page size determines addressing format and command sequences - users must configure system software accordingly. Both sizes are fully supported in all operational modes including RapidS™ and low-power read.

Does the AT45DB161E-MHD-T support true read-while-write functionality?

Yes, the AT45DB161E-MHD-T supports true concurrent operation via its two independent SRAM buffers. While one buffer accepts incoming data over SPI, the other can simultaneously transfer content to main memory - enabling uninterrupted data ingestion during background programming. This eliminates write latency in continuous streaming applications such as audio buffering or sensor logging.

How does hardware sector lockdown work on the AT45DB161E-MHD-T?

Hardware sector lockdown on the AT45DB161E-MHD-T is implemented via a dedicated register that, once programmed, permanently disables write/erase access to a selected sector. The lockdown state is irreversible and survives power cycles. It is enforced independently of software protection and cannot be overridden by WP pin state or command sequences - ensuring immutable protection for boot code or calibration data.

What power-saving modes does the AT45DB161E-MHD-T offer, and how do they differ?

The AT45DB161E-MHD-T provides three low-power states: standby (25 µA typical), deep power-down (5 µA typical), and ultra-deep power-down (400 nA typical). Ultra-deep mode disables all internal circuitry except the wake-up detection logic, requiring a CS pulse to resume. Deep power-down retains register contents; ultra-deep does not - both reduce energy consumption by >99% versus active operation.

Is the AT45DB161E-MHD-T compatible with standard SPI controllers?

Yes, the AT45DB161E-MHD-T is fully compatible with standard SPI controllers supporting modes 0 and 3. It uses standard SI/SO/SCK/CS signaling and requires no special drivers. However, to leverage RapidS™ mode (85 MHz), the host controller must support faster clock rates and tighter timing margins than typical SPI peripherals - verification against AC characteristics in DS-AT45DB161E-8782 is recommended.