MSM6242B - OKI electronic componets

MSM6242B DIRECT BUS CONNECTED CMOS REAL TIME CLOCK/CALENDAR

The MSM6242B is a silicon gate CMOS Real Time Clock/Calendar for use in direct busconnection Microprocessor/Microcomputer applications. An on-chip 32.768 KHz crystal oscillator time base is divided to provide addressable 4-bit I/O data for SECONDS, MINUTES, HOURS, DAY OF WEEK, DATE, MONTH and YEAR. Data access is controlled by 4-bit address, chip selects (CS.

Features

DIRECT MICROPROCESSOR/MICROCONTROLLER BUS CONNECTION TIME 23:59:59 MONTH 12 DATE 31 YEAR 80
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• DAY OF WEEK 7
• 4-bit data bus
• 4-bit address bus
• READ, WRITE, ALE and CHIP SELECT INPUTS
• Status registers
  – IRQ and BUSY
• Selectable interrupt outputs
  – 1/64 second, 1 second, 1 minute, 1 hour
• Interrupt masking
• 32.768 KHz crystal controlled operation 12/24 hour format Auto leap year ± 30 second error correction Single 5V supply Battery backup down to VDD = 2.0V Low power dissipation: 20µW max at VDD = 2V 150µW max at VDD = 5V
• 18 pin Plastic DIP (DIP18-P-300)
• 24 Pin-V Plastic.