This document is a data sheet for the GMS90 series 8-bit single-chip microcontrollers, providing information about the features and characteristics of the products.
The GMS90 series from LG Semicon are 8‑bit single‑chip microcontrollers compatible with the standard MCS‑51 architecture. They offer a range of ROM sizes, operating voltages, and package options, and support frequencies up to 40 MHz.
The document provides a selection guide, detailed pin configurations for PLCC, DIP and MQFP packages, and a mask order & verification sheet for customers. It also lists electrical characteristics, memory capacities, and peripheral features such as timers, USART, and interrupt sources.
| Operating Voltage (C) | 4.25~5.5 V |
|---|---|
| Maximum Frequency | 40 MHz |
| Package Types | 40‑PDIP, 44‑PLCC, 44‑MQFP |
| RAM Size | 128 bytes (8‑bit) |
The C version operates from 4.25 V to 5.5 V, while the low‑voltage L version operates from 2.7 V to 3.6 V.
They can run at frequencies up to 40 MHz.
GMS90 devices are offered in 40‑pin DIP, 44‑pin PLCC, and 44‑pin MQFP packages.