MC146818A - REAL-TIME CLOCK PLUS RAM

Motorola Semiconductor (now NXP Semiconductors)

Datasheet Details

Part number	MC146818A
Manufacturer	Motorola Semiconductor (now NXP Semiconductors)
File Size	2.15 MB
Description	REAL-TIME CLOCK PLUS RAM
Datasheet	MC146818A Datasheet

Overview

MC146818A I I Advance Information I CMOS REAL-TIME CLOCK PLUS RAM (RTC) The MC146818A Real-Time Clock plus RAM is a peripheral device which includes the unique MOTEL concept for use with various microprocessors, microcomputers, and larger computers.

Key Features

a complete time-of-day clock with alarm and one hundred year calendar, a programmable periodic interrupt and square-wave generator, and 50 bytes of low-power static RAM. The MC146818A uses high-speed CMOS technology to interface with 1 MHz processor buses, while consuming very little power. The Real-Time Clock plus RAM has two distinct uses. First, it is designed as a battery powered CMOS part (in an otherwise NMOS/TTL system) including all the common battery backed-up functions such as RAM, ti.

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