MC146818A - REAL-TIME CLOCK PLUS RAM

Motorola

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Datasheet Details

Part number	MC146818A
Manufacturer	Motorola
File Size	2.15 MB
Description	REAL-TIME CLOCK PLUS RAM
Datasheet	MC146818A_Motorola.pdf

MC146818A Product details

Description

I Symbol I ltRrl Min TBD TBD TDn I Max 1Reset Pulse Width Reset Delay Time D, ,1-DA,.,-.C---!AI; A+L I tRWL tRLH I +-, .,, [ I lTBDlms] I I I I I ll~lmsl KS ps ..I I I I ps &s ‘i! I DS RESET . ITQ VDD 2k (KQ OnIV) L MM D7000 or Equivalent 130pF .All Outputs Except OSC2 (See Figure 10) .T Products Inc.. m MOTOROLA Semiconductor 6 FIGURE 7 POWER-UP VDD Pin ~~ Ov RESET Pin CKOUT Pin VDD

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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Published: Jul 28, 2005 |