Renesas AT25DN011-XMHF-B

Overview

AT25DN011-XMHF-B from Renesas Electronics is a 1-Mbit SPI serial flash memory IC designed for code shadowing and embedded data storage in resource-constrained systems. It operates from 2.3 V to 3.6 V, supports SPI Modes 0/3 and Dual-Output Read, delivers 104 MHz max clock frequency, and achieves 6 ns clock-to-output timing - enabling fast boot and firmware update in industrial controllers and IoT edge nodes.

For engineers reviewing the AT25DN011-XMHF-B datasheet, AT25DN011-XMHF-B pinout, AT25DN011-XMHF-B application, or AT25DN011-XMHF-B equivalent, key selection criteria include dual-output read throughput, ultra-deep power-down current (350 nA), flexible erase granularity (256-byte page / 4-kB & 32-kB blocks), OTP security register, and industrial temperature support (–40°C to +85°C).

Technical Context

The AT25DN011-XMHF-B implements a dedicated SPI interface with hardware-controlled write protection via the WP pin and suspend/resume capability via HOLD. Its command set includes standardized opcodes (e.g., 03h, 0Bh, 3Bh, 20h, 52h) for read, dual-output read, page/sector/chip erase, and OTP programming - all compliant with JEDEC ID read methodology.

Internally, it features a segmented memory architecture with uniform 4-kB and 32-kB erase blocks plus 256-byte programmable pages, enabling efficient co-location of code modules and runtime data without cross-erase interference. The status register (Byte 1 and Byte 2) provides real-time visibility into write-in-progress, write-protection, and deep power-down states.

Key Specifications

Pinout & Package

AT25DN011-XMHF-B is packaged in an 8-lead SOIC (150-mil) with standard JEDEC footprint. Pin functions are fully SPI-compatible and support hardware write protection and communication hold.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q10EW and MX25U1035F, the AT25DN011-XMHF-B uniquely combines Dual-Output Read, 350 nA ultra-deep power-down, and 128-byte OTP in a standard 8-pin SOIC - delivering balanced performance, security, and energy efficiency without interface or layout overhead.

Availability

AT25DN011-XMHF-B is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and battery-powered IoT edge devices requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for AT25DN011-XMHF-B 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 specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT markets.

The AT25DN011-XMHF-B belongs to Renesas' AT25DN family of SPI flash memories engineered for low-voltage, low-power, and secure embedded code and data storage - targeting applications where reliability, security, and energy efficiency are design-critical.

FAQ

What is the maximum operating frequency and corresponding read command for highest throughput on the AT25DN011-XMHF-B?

The AT25DN011-XMHF-B supports up to 104 MHz clock frequency. For highest throughput, use the Dual-Output Read command (opcode 3Bh), which clocks out two bits per SCK falling edge - achieving up to 208 Mbps effective data rate. This is significantly faster than standard Read Array (03h/0Bh), which is limited to 33 MHz or 104 MHz depending on opcode and dummy byte usage. The AT25DN011-XMHF-B's 6 ns clock-to-output timing ensures minimal latency at full speed.

Does the AT25DN011-XMHF-B support hardware write protection, and how is it implemented?

Yes, the AT25DN011-XMHF-B supports hardware write protection via the active-low WP pin. When WP is driven low, it locks protected memory sectors regardless of software commands - providing fail-safe protection against accidental or malicious writes. The WP pin is internally pulled high, so it can be left floating if unused, though Renesas recommends connecting it to VCC externally. Protection granularity is configurable via status register bits and aligns with the device's 4-kB and 32-kB erase blocks. This feature is fully documented in Section 9 of the AT25DN011-XMHF-B datasheet.

What erase options does the AT25DN011-XMHF-B provide, and why is page-level erase important?

The AT25DN011-XMHF-B supports four erase modes: 256-byte page erase (81h), 4-kB block erase (20h), 32-kB block erase (52h), and full chip erase (60h/C7h). Page-level erase is critical because it enables precise, low-overhead updates of small data segments - such as configuration flags or sensor logs - without erasing adjacent code or calibration data stored in neighboring pages. This avoids the wasted space and longer erase times inherent in large-block-only flash devices, improving both memory utilization and field-upgrade reliability. The AT25DN011-XMHF-B's architecture makes it ideal for mixed code-and-data applications.

How does the OTP security register in the AT25DN011-XMHF-B enhance system security?

The AT25DN011-XMHF-B includes a 128-byte One-Time Programmable (OTP) security register accessible via opcodes 9Bh (program) and 77h (read). Once written, OTP contents cannot be altered - making it suitable for storing immutable values like electronic serial numbers (ESN), device-specific cryptographic keys, or factory calibration constants. This prevents cloning or unauthorized reprogramming of critical identifiers. Unlike standard flash memory, the OTP register is physically isolated and programmed using dedicated command sequences, ensuring robustness against software faults or malicious overwrite attempts. The AT25DN011-XMHF-B's OTP is a hardware-enforced security primitive, not emulated in firmware.

What power-saving modes does the AT25DN011-XMHF-B offer, and what are their typical current draws?

The AT25DN011-XMHF-B offers three low-power states: Standby (25 µA typical), Deep Power-Down (7.5 µA typical), and Ultra-Deep Power-Down (350 nA typical). Ultra-Deep Power-Down is entered via opcode 79h and exited via 79h toggle or chip-select pulse - ideal for multi-year battery operation in intermittently active sensors. All modes retain memory contents without external backup. These values are measured at VCC = 3.0 V and TA = 25°C per the AT25DN011-XMHF-B datasheet (Rev. K, Table 13.3). No external components or voltage scaling are required to achieve these currents.