Renesas AT25DL161-MHN-Y

Overview

AT25DL161-MHN-Y from Renesas Electronics is a 16-Mbit serial Flash memory IC with SPI and Dual-I/O interface, operating from 1.65 V to 1.95 V. It delivers 100 MHz RapidS™ read performance, 5 ns clock-to-output time, and supports uniform 4-kB/32-kB/64-kB block erase - enabling efficient code shadowing and secure data logging in resource-constrained embedded systems.

For engineers reviewing the AT25DL161-MHN-Y datasheet, AT25DL161-MHN-Y pinout, AT25DL161-MHN-Y application, or AT25DL161-MHN-Y equivalent, key selection criteria include its 1.65–1.95 V single-supply operation, hardware write-protect (WP) and hold (HOLD) pins, OTP security register, sector lockdown capability, and industrial temperature range (–40 °C to +85 °C).

Technical Context

The AT25DL161-MHN-Y implements a flexible erase architecture with 32 × 64-kB sectors, supporting byte/page program (1–256 bytes), dual-input programming, and dual-output reads. Its control logic integrates status register byte 1 and byte 2 for protection state management, suspend/resume during program/erase, and deep power-down mode with 8 µA typical current.

It uses standard SPI Modes 0 and 3, with SCK rising-edge sampling on SI/SIO and falling-edge output on SO/SOI. The device features hardware-controlled locking via WP pin, global protect/unprotect command, and permanent sector lockdown with freeze option - all managed through dedicated security and protection commands per JEDEC ID methodology.

Key Specifications

Pinout & Package

AT25DL161-MHN-Y is packaged in an 8-lead SOIC (150-mil wide), RoHS-compliant, green package. Pin functions are electrically validated per Renesas DS-AT25DL161-8795 Rev.L.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q16JW and MX25L1633F, AT25DL161-MHN-Y uniquely combines 1.8 V operation, Dual-I/O support, sector lockdown freeze, and 128-byte OTP in a single SOIC package - delivering integrated security and power efficiency without external components or voltage conversion.

Availability

AT25DL161-MHN-Y is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and secure IoT edge nodes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for AT25DL161-MHN-Y 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 applications.

The AT25DL161-MHN-Y belongs to Renesas' serial Flash memory product line, engineered specifically for secure, low-voltage embedded systems requiring robust code storage, field-upgradable data logging, and hardware-enforced protection against firmware corruption.

FAQ

What is the operating voltage range of the AT25DL161-MHN-Y?

The AT25DL161-MHN-Y operates from 1.65 V to 1.95 V - designed explicitly for 1.8 V systems without requiring external voltage regulation or level shifters. This single-supply operation simplifies power design and reduces bill-of-materials cost. All read, program, and erase functions are fully specified across this range, including at temperature extremes (–40 °C to +85 °C). The AT25DL161-MHN-Y does not support 3.3 V operation.

Does the AT25DL161-MHN-Y support Quad SPI mode?

No, the AT25DL161-MHN-Y does not support Quad SPI. It supports standard SPI Modes 0 and 3, plus Dual-I/O operation (Dual-Output Read and Dual-Input Program) using SI/SIO and SO/SOI pins. This provides 2× throughput over standard single-I/O SPI but differs fundamentally from Quad SPI's four-line data bus. The AT25DL161-MHN-Y pinout and command set are incompatible with Quad SPI protocols.

How many sectors does the AT25DL161-MHN-Y have, and what are their sizes?

The AT25DL161-MHN-Y contains 32 uniform sectors, each 64 kB in size, totaling 2 MB (16 Mbit). It supports erasure at four granularities: 4-kB blocks (sub-sector), 32-kB blocks, 64-kB sectors, and full-chip erase. This hierarchical erase architecture allows optimized wear leveling and independent update of code modules or data segments without affecting unrelated regions - a key advantage over fixed-block Flash devices. The AT25DL161-MHN-Y does not implement smaller than 4-kB erase units.

Can the AT25DL161-MHN-Y's OTP security register be reprogrammed?

No, the 128-byte OTP (One-Time Programmable) security register in the AT25DL161-MHN-Y is permanently programmable - once written, bits cannot be altered or erased. The first 64 bytes are factory-programmed (e.g., manufacturer ID), and the remaining 64 bytes are user-programmable during production or field provisioning. This immutability ensures cryptographic keys, device serial numbers, or secure boot hashes remain tamper-proof. The AT25DL161-MHN-Y provides no command or mechanism to reset or rewrite the OTP register after initial programming.

What is the purpose of the HOLD pin on the AT25DL161-MHN-Y?

The HOLD pin on the AT25DL161-MHN-Y temporarily suspends ongoing SPI communication without deselecting the device or resetting internal state - allowing the host controller to service interrupts or perform urgent tasks while preserving the current command context. When asserted (low), it places SO in high-impedance and ignores SCK and SI transitions. The AT25DL161-MHN-Y resumes exactly where it left off upon deassertion, making it ideal for deterministic real-time systems. HOLD does not affect active program or erase cycles.