MC100H640 Overview
Description
The MC10H/100H640 generates the necessary clocks for the 68030, 68040 and similar microprocessors. It is guaranteed to meet the clock specifications required by the 68030 and 68040 in terms of part-to-part skew, within-part skew and also duty cycle skew.
Key Features
- Power-Up: The device is designed to have the POS edges of the ÷ 2 and ÷ 4 outputs synchronized at power up
- Select (SEL): LOW selects the ECL input source (DE/DE)
- HIGH selects the TTL input source (DT)
- The H640 also contains circuitry to force a stable state of the ECL input differential pair, should both sides be left open
- In this case, the DE side of the input is pulled LOW, and DE goes HIGH
- xxx A WL YY WW G = 10 or 100 = Assembly Location = Wafer Lot = Year = Work Week = Pb-Fre
