MC100H644 Datasheet (ON Semiconductor) - 68030/040 PECL-TTL CLOCK DRIVER

MC100H644, 68030/040 PECL-TTL CLOCK DRIVER

PIN GT VT VE GE DE, DE VBB DT Qn, Qn SEL R FUNCTION TTL Ground (0 V) TTL VCC (+5.0 V) ECL VCC (+5.0 V) ECL Ground (0 V) ECL Signal Input (positive ECL) VBB Reference Output TTL Signal Input Signal Outputs (TTL) Input Select (TTL) Reset (TTL) *Skews are specified for Identical Edges Figure 1.

www.DataSheet4U.com MC10H644, MC100H644 68030/040 PECL to TTL Clock Driver The MC10H/100H644 generates the necessary clocks for the 68030, 68040 and similar microprocessors.

The device is functionally equivalent to the H640, but with fewer outputs in a smaller outline 20 lead PLCC package.

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.

The user has a choic

MC100H644 Features

* MOLD FLASH. ALLOWABLE MOLD FLASH IS 0.010 (0.250) PER SIDE. 4. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 5. CONTROLLING DIMENSION: INCH. 6. THE PACKAGE TOP MAY BE SMALLER THAN THE PACKAGE BOTTOM BY UP TO 0.012 (0.300). DIMENSIONS R AND U ARE DETERMINED AT THE OUTERMOST EXTREMES OF THE PLA