Renesas AT25XV041B-SSHV-T

Overview

AT25XV041B-SSHV-T from Renesas Electronics is a 4-Mbit serial SPI Flash memory IC designed for code shadowing, OTA firmware updates, and local data logging in battery-powered embedded systems. It operates across 1.65 V–4.4 V, supports Dual-I/O read at up to 85 MHz, delivers 7.5 ns clock-to-output timing, and features uniform 4-kByte/32-kByte/64-kByte block erase plus 256-byte page erase.

For engineers reviewing the AT25XV041B-SSHV-T datasheet, AT25XV041B-SSHV-T pinout, AT25XV041B-SSHV-T application, or AT25XV041B-SSHV-T equivalent, key selection criteria include ultra-low 200 nA deep power-down current, hardware write protection via WP pin, OTP security register with factory-programmed unique ID, and JEDEC-standard device identification.

Technical Context

The AT25XV041B-SSHV-T implements a SPI-compatible interface supporting Modes 0 and 3, with Dual-I/O capability enabling two-bit-per-clock read throughput. Its memory architecture includes hierarchical erase granularity-256-byte pages, 4-kByte blocks (64 blocks), 32-kByte blocks (16 blocks), and 64-kByte blocks (8 blocks)-optimized for mixed code/data storage.

It integrates dedicated control logic for hardware sector locking via the WP pin, active status interrupt signaling, and dual-stage low-power modes: Deep Power-Down (5 µA typical) and Ultra-Deep Power-Down (200 nA typical). The 128-byte OTP register contains 64 bytes of factory-unique ID and 64 bytes user-programmable for secure serialization.

Key Specifications

Pinout & Package

AT25XV041B-SSHV-T is packaged in an 8-lead SOIC (150-mil) with standard JEDEC footprint. Pin functions are fully SPI-compliant with hardware write protection and hold functionality.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q40EW and MX25L4033F, the AT25XV041B-SSHV-T uniquely combines 1.65–4.4 V operation, 85 MHz Dual-I/O, and 200 nA Ultra-Deep Power-Down - making it optimal for universal-voltage, battery-critical embedded designs where pin count and power budget are constrained.

Availability

AT25XV041B-SSHV-T is available at Aetrix Electronics and suitable for wireless sensor node firmware storage, medical wearable code shadowing, and industrial PLC configuration backup requiring stable component supply across automotive-grade temperature ranges and long-lifecycle programs.

Supply support for AT25XV041B-SSHV-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, infrastructure, and IoT applications.

The AT25XV041B-SSHV-T belongs to Renesas' low-voltage serial Flash memory product line, engineered specifically for energy-constrained, always-on connected devices requiring secure, reliable, and ultra-low-power non-volatile storage.

FAQ

What voltage range does the AT25XV041B-SSHV-T support, and why is this important for battery-powered designs?

The AT25XV041B-SSHV-T supports a wide 1.65 V to 4.4 V supply range. This allows direct interfacing with aging lithium coin cells (down to ~1.7 V), single Li-ion/polymer batteries (3.0–4.2 V), and regulated 3.3 V or 1.8 V rails - eliminating level shifters and simplifying power architecture in portable and IoT devices. Its operation across this full range ensures consistent performance from fresh to end-of-life battery voltage.

Does the AT25XV041B-SSHV-T support hardware write protection, and how is it implemented?

Yes, the AT25XV041B-SSHV-T implements hardware write protection via the dedicated WP (Write Protect) pin. When pulled low, the WP pin enables hardware locking of protected sectors independently of software commands - providing tamper-resistant protection against accidental or malicious firmware corruption. The pin is internally pulled high, allowing it to be left floating if unused, though external connection to VCC is recommended for noise immunity.

What is the purpose and structure of the OTP security register in the AT25XV041B-SSHV-T?

The AT25XV041B-SSHV-T includes a 128-byte One-Time Programmable (OTP) security register. Of these, 64 bytes are factory-programmed with a unique device identifier (UID), and the remaining 64 bytes are user-programmable once. This register supports secure device serialization, ESN storage, and locked key binding - enabling cryptographic authentication and anti-cloning measures in certified medical or industrial systems.

How does the AT25XV041B-SSHV-T achieve ultra-low power consumption in standby modes?

The AT25XV041B-SSHV-T offers two ultra-low power states: Deep Power-Down (5 µA typical) and Ultra-Deep Power-Down (200 nA typical). Entry is controlled via SPI command, and both modes retain full memory content while disabling internal clocks and I/O buffers. The 200 nA specification enables multi-year operation on small batteries - critical for maintenance-free sensor nodes and disposable consumables.

What erase block sizes does the AT25XV041B-SSHV-T support, and how do they benefit firmware update strategies?

The AT25XV041B-SSHV-T supports four erase granularities: 256-byte pages, 4-kByte blocks (64 total), 32-kByte blocks (16 total), and 64-kByte blocks (8 total). This hierarchy enables precise OTA updates - small patches use page erase, modular firmware components use 4-kB blocks, and full application reloads use larger blocks - minimizing wear and maximizing endurance across the 100,000-cycle lifetime of the AT25XV041B-SSHV-T.