Renesas AT25DN512C-XMHFGP-T

Overview

AT25DN512C-XMHFGP-T from Adesto Technologies is a 512-Kbit serial Flash memory IC with SPI interface, dual-output read support, 104MHz max clock frequency, 6ns clock-to-output delay, and flexible erase architecture (256-byte page / 4-Kbyte / 32-Kbyte / full chip). It serves as nonvolatile code and data storage in microcontroller-based embedded systems requiring low-power operation and hardware write protection.

For engineers reviewing the AT25DN512C-XMHFGP-T datasheet, AT25DN512C-XMHFGP-T pinout, AT25DN512C-XMHFGP-T application, or AT25DN512C-XMHFGP-T equivalent, key selection considerations include SPI Mode 0/3 compatibility, 2.3V–3.6V supply range, OTP security register usability, ultra-deep power-down current (350nA), and SOIC-8 (150-mil) package fit for space-constrained industrial PCBs.

Technical Context

The AT25DN512C-XMHFGP-T implements a dedicated SPI master-slave interface with four signal lines (CS, SCK, SI/I/O0, SO/I/O1), supporting standard and dual-output read modes. Its internal address counter enables continuous sequential reads, and intelligent programming/erase algorithms report failures via the EPE bit in the Status Register.

Hardware-controlled sector locking uses the WP pin (active-low), while HOLD enables communication pause without deselection. The device integrates a 128-byte OTP security register-64 bytes factory-programmed with a unique identifier and 64 bytes user-programmable-for serialization and secure key storage.

Key Specifications

Pinout & Package

AT25DN512C-XMHFGP-T is packaged in an industry-standard 8-lead SOIC (150-mil) body with 1.27 mm pitch, RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q40EWUXIE and MX25L4006EM2I-12G, the AT25DN512C-XMHFGP-T delivers optimal balance of low-power operation (350nA), dual-output throughput, and integrated security (OTP register), making it uniquely suited for compact, battery-sensitive, and firmware-secure embedded applications where 512 Kbit capacity suffices.

Availability

AT25DN512C-XMHFGP-T is available at Aetrix Electronics and suitable for wireless sensor nodes, industrial PLCs, medical wearables, smart meters, and automotive body control modules requiring stable component supply and long-term manufacturability.

Supply support for AT25DN512C-XMHFGP-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

Adesto Technologies (now part of Dialog Semiconductor, part of Renesas Electronics) specialized in low-power, nonvolatile memory and IoT connectivity solutions for resource-constrained embedded systems.

The AT25DN512C product line was designed for cost-sensitive, power-aware applications requiring reliable code and data storage - especially in battery-operated sensors, wearables, and industrial edge devices where dual-output read and OTP security add tangible system-level value.

FAQ

What is the maximum SPI clock frequency supported by the AT25DN512C-XMHFGP-T?

The AT25DN512C-XMHFGP-T supports up to 104 MHz for standard Read Array (0Bh) and program/erase operations. Dual-Output Read (3Bh) operates up to 50 MHz. These frequencies are validated across the full industrial temperature range (−40°C to +85°C) and 2.3V–3.6V supply, ensuring deterministic timing in real-time embedded systems. The AT25DN512C-XMHFGP-T datasheet specifies tV = 6 ns, confirming sub-10 ns read latency at rated speed.

Does the AT25DN512C-XMHFGP-T support SPI Mode 1 or Mode 2?

No, the AT25DN512C-XMHFGP-T explicitly supports only SPI Modes 0 and 3, as confirmed in the official datasheet (DS-25DN512C–037H–02/2022, Section 5). Mode 0 uses CPOL = 0 and CPHA = 0; Mode 3 uses CPOL = 1 and CPHA = 0. Data is always latched on the rising edge of SCK and output on the falling edge. Attempting Mode 1 or Mode 2 will result in incorrect data sampling and communication failure. The AT25DN512C-XMHFGP-T does not interpret or adapt to unsupported modes.

How is the 128-byte OTP security register structured in the AT25DN512C-XMHFGP-T?

The AT25DN512C-XMHFGP-T OTP security register is split into two 64-byte segments: the first 64 bytes are factory-programmed with a unique device identifier (e.g., serial number or ESN), and the second 64 bytes are user-programmable via the 9Bh Program OTP Security Register command. Both segments are one-time programmable - once written, bits can only be changed from '1' to '0', and no erasure is possible. This structure enables secure device binding and firmware signing key storage. The AT25DN512C-XMHFGP-T OTP is independent of main memory and retains data for 20 years.

What package type is used for the AT25DN512C-XMHFGP-T?

The AT25DN512C-XMHFGP-T uses an 8-lead SOIC (Small Outline Integrated Circuit) package with 150-mil body width and 1.27 mm lead pitch. This is confirmed by the "XMHFGP-T" suffix per Adesto's naming convention and the mechanical drawings in Figures 2-1 and 2-2 of DS-25DN512C–037H–02/2022. It is RoHS-compliant, halogen-free, and compatible with standard reflow soldering profiles. The AT25DN512C-XMHFGP-T is not offered in DFN or TSSOP variants under this specific part number.

Can the AT25DN512C-XMHFGP-T be used in place of a standard SPI NOR Flash without firmware changes?

Yes - the AT25DN512C-XMHFGP-T is fully SPI-compatible with JEDEC-standard opcodes (e.g., 03h Read, 02h Page Program, 20h Block Erase, 05h Read Status) and supports common SPI Modes 0/3. Its command set, timing, and pinout match industry-standard serial NOR Flash devices. However, to leverage Dual-Output Read (3Bh) or OTP programming (9Bh), firmware modifications are required. For basic read/write/erase functionality, no changes are needed. The AT25DN512C-XMHFGP-T maintains backward compatibility while adding optional enhancements.