EM78447S is an 8-bit microprocessor with low-power and high-speed CMOS technology.
This document describes the ELAN EM78447S 8‑bit microcontroller with integrated watchdog timer, RAM, ROM, real‑time clock, and tri‑state I/O. It lists the device features, operating voltage and temperature ranges, and package options.
Detailed sections cover pin assignments for various package types, functional block diagrams, register descriptions, and AC electrical characteristics such as timing parameters and power consumption. An appendix summarizes the available package types and dimensions.
| Operating voltage range | 2.3 V ~ 5.5 V |
|---|---|
| Operating temperature range | 0 °C ~ 70 °C |
| On‑chip ROM size | 4 K × 13 bits |
| On‑chip SRAM size | 148 × 8 bits |
| Typical power consumption at 5 V/4 MHz | < 2.2 mA |
| Crystal mode maximum frequency | 20 MHz at 5 V |
| Package type (DIP) | 28‑pin DIP 600 mil |
The device operates from 2.3 V to 5.5 V.
It provides three bi‑directional I/O ports.
Typical consumption is about 1 µA during sleep mode.
Available packages include 28‑pin DIP 600 mil, 28‑pin SOP 300 mil, 28‑pin SSOP 209 mil, 32‑pin DIP 600 mil, and 32‑pin SOP 450 mil.