Microchip Technology AT45DB161E-CCUD-T

Overview

AT45DB161E-CCUD-T from Microchip Technology (formerly Atmel) is a 16-Mbit serial DataFlash memory with dual 512/528-byte SRAM buffers, SPI interface supporting modes 0 and 3, 85 MHz max clock, and 6 ns clock-to-output time. It operates from a single 2.3V–3.6V supply and targets embedded firmware storage, voice/image buffering, and E²PROM emulation in space-constrained industrial systems.

For engineers reviewing the AT45DB161E-CCUD-T datasheet, AT45DB161E-CCUD-T pinout, AT45DB161E-CCUD-T application, or AT45DB161E-CCUD-T equivalent, key selection criteria include page size configurability (512 vs. 528 bytes), RapidS high-speed read support, buffer interleaving capability, ultra-low deep power-down current (500 nA), and hardware write protection via WP pin.

Technical Context

The AT45DB161E-CCUD-T implements a sequential-access Flash architecture with two independent SRAM buffers enabling concurrent data reception and main memory reprogramming. Its SPI interface supports legacy and RapidS protocols across four continuous read opcodes (01h, 03h, 0Bh, 1Bh) with distinct timing specs (fCAR1/fCAR2/fCAR3).

Memory organization comprises 4,096 pages of 512 or 528 bytes each, plus 512 Kbits extra capacity. Erase granularity spans page (512/528 B), block (4 KB), sector (128 KB), and chip (16 Mbits), all self-timed and suspend/resume capable. The 128-byte OTP security register includes factory-programmed unique ID and user-programmable fields.

Key Specifications

Pinout & Package

AT45DB161E-CCUD-T uses an 8-pad Ultra-thin DFN package (5 × 6 × 0.6 mm) with exposed thermal pad (NC, not internally connected). Pin functions are validated per Atmel 8782A–DFLASH–3/12 datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT45DB161E-CCUD-T, W25Q16JVSSIQ offers higher peak bandwidth via Quad SPI but lacks buffer-assisted streaming and hardware write protection; MX25L1606EM2I-12G provides basic SPI compatibility at lower cost but omits OTP security, dual-buffer concurrency, and sub-μA power states essential for secure, low-power embedded designs.

Availability

AT45DB161E-CCUD-T is available at Aetrix Electronics and suitable for firmware storage, voice/data buffering, and secure configuration storage requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AT45DB161E-CCUD-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

Microchip Technology acquired Atmel in 2016 and maintains full support for the DataFlash product line, including technical documentation, validation tools, and long-term manufacturing commitments.

The AT45DB161E-CCUD-T belongs to the DataFlash family, designed specifically for high-reliability, low-pin-count sequential storage in resource-constrained embedded systems where SPI simplicity, buffer-assisted streaming, and ultra-low power are mandatory.

FAQ

What is the exact memory organization of the AT45DB161E-CCUD-T?

The AT45DB161E-CCUD-T contains 17,301,504 bits organized as 4,096 pages of either 512 bytes (binary mode) or 528 bytes (standard mode), plus two independent 512/528-byte SRAM buffers and a 128-byte OTP security register. Page size is factory-configured and fixed per unit; the AT45DB161E-CCUD-T is specified for 528-byte pages per its DFN-8 package marking and datasheet default.

Does the AT45DB161E-CCUD-T support true random access like parallel Flash?

No, the AT45DB161E-CCUD-T uses sequential-access architecture optimized for streaming. It does not support true random access with address bus multiplexing. Instead, it relies on continuous read commands (e.g., 0Bh, 1Bh opcodes) and internal address counters to emulate fast linear access - ideal for firmware loading and audio playback but unsuitable for pointer-based data structures.

How does the dual-buffer feature of the AT45DB161E-CCUD-T improve system throughput?

The AT45DB161E-CCUD-T's two independent SRAM buffers allow one buffer to accept incoming data via SPI while the other simultaneously programs into Flash memory. This interleaving eliminates idle time between page writes, sustaining continuous data streams - critical for real-time sensor logging or voice capture where gaps would corrupt sample integrity.

What are the power-down current specifications for the AT45DB161E-CCUD-T?

The AT45DB161E-CCUD-T achieves 500 nA typical ultra-deep power-down current and 3 μA typical deep power-down current. These values are measured under specified VCC and temperature conditions per the 8782A–DFLASH–3/12 datasheet and enable multi-year battery operation in maintenance-free IoT endpoints - a key differentiator versus standard SPI NOR Flash devices.

Is the AT45DB161E-CCUD-T pin-compatible with earlier AT45DB161D variants?

Yes, the AT45DB161E-CCUD-T maintains identical pinout, package dimensions (8-pad UDFN, 5 × 6 × 0.6 mm), and electrical interface with the AT45DB161D series. Key improvements include enhanced RapidS timing, tighter tV specification (6 ns max), and updated endurance/reliability metrics - making it a drop-in replacement for existing AT45DB161D designs without layout changes.