The MX35LF1GE4AB from Macronix International - low-power NOR flash for always-on IoT

Reviewed: ad hoc news New Release & Launch desk. Edited and checked on 2026-06-30, 02:41. Details in the imprint.

The MX35LF1GE4AB from Macronix International sits on a tiny PCB, its package barely larger than a fingernail, yet it quietly stores 1 Gbit of code and data for an always-on sensor hub. Engineers feel the difference in the lab when boards finally boot reliably at cold and warm.

What this NOR flash offers

The MX35LF1GE4AB is a 1 Gbit serial NOR flash designed for 3.0 V systems, giving embedded designers non-volatile storage for code, parameters and logs without moving parts or wear-leveling headaches. It belongs to Macronix's MX35 series of Quad I/O NOR devices.

The chip supports standard SPI as well as dual and quad read modes, which lets firmware load faster than on simple single-bit serial flashes while keeping the pin-count modest. That balance matters in IoT modules where every pin and every milliwatt is negotiated.

How it behaves in real hardware

On a development board, the MX35LF1GE4AB responds with snappy read performance when the microcontroller cranks up quad-output mode, so a bootloader can pull firmware images without the sluggish feeling developers know from older serial parts. Write and erase cycles are rated into the hundred-thousand range, which is enough for typical configuration updates.

Jay Wu, a firmware engineer at an industrial gateway maker, describes the experience as "finally having a quiet, dependable storage block instead of a tiny drama queen" when his team switched to Macronix NOR for their safety-critical logger. That human relief is part of the product story.

Power, endurance and footprint

The MX35LF1GE4AB aims at low-power use cases, with standby currents down in the microamp range and active read currents tailored for battery-driven devices. In practice, that means a sensor node can keep its configuration and logs in place without hammering a coin cell.

Because NOR flash reads memory cell contents directly, code can execute-in-place from this device in some architectures, saving RAM and simplifying boot flows. Designers of small edge controllers use this to keep their bill of materials tidy while still offering over-the-air updates.

Where it fits in the portfolio

The MX35LF1GE4AB sits between smaller MX35 parts around 256 Mbit and larger 2 Gbit devices, so it typically lands in gateways, automotive modules and smart home bridges that need a full operating system plus logs. It is not overkill and not cramped.

Compared with big NAND devices, this NOR flash trades capacity for random-read simplicity and robustness, which is why it often wins in safety-critical designs and boot-storage roles. That positioning has made Macronix a familiar name on many automotive and industrial schematics.

Context and the share reference

Macronix International, headquartered in Hsinchu, Taiwan, builds a broad portfolio of non-volatile memory chips for consumer, industrial and automotive customers, with NOR flash, NAND and ROM lines filling different roles. The MX35LF1GE4AB is one of the quiet workhorses that underpins those revenue streams.

Macronix International shares (ISIN TW0002337003) trade primarily on the Taiwan Stock Exchange in New Taiwan dollars, and the MX35 series contributes to the company’s positioning as a supplier for embedded and IoT storage.

This article was AI-assisted and editorially reviewed. Product information without guarantee; prices and availability may change at short notice. No investment advice, no buy or sell recommendation. Stock-market transactions involve risks up to total loss.

en | TW0002337003 | MACRONIX | boerse | 69656270 | bgmi