STMicroelectronics M74HC592
The M54/74HC592 is a high speed CMOS 8 BIT REGISTER COUNTER fabricated in silicon gate C2MOS technology. It has the same high speed performance of LSTTL combined with true CMOS low power consumption.DESCRIPTION
The M54/74HC592 is a parallel input, 8 bit storage register feeding an 8 bit binary counter. Both the register and the counter have individual positive edge triggered clock. In addition, the counter has direct load and clear functions. Expansion is easily accomplished by connecting RCO af the first stage to the count enable of the second stage. All inputs are equipped with protection circuits against static discharge and transient excess voltage. INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN CONNECTIONS (top view) NC = No Internal Connection October 1993 1/13 M54/M74HC592 TRUTH TABLE INPUTS RCK X X CLOAD L H H H H H H CCLR H L H H H H H CCKEN X X X X L L H X CCK X X X X FUNCTION REGISTER DATA IS LOADED INTO COUNTER COUNTER CLEAR THE DATA OF A THRU H INPUTS IS STORED INTO REGISTER REGISTER STATE IS NOT CHANGED COUNTER ADVANCES THE COUNT NO COUNT NO COUNT X X X X: Don’t Care RCO = QA’● QB’
● QC’
● QD’
● QE’
● QF’
● QG’
● QH’ (QA’ to QH’: Internal outputs of the counter) TIMING CHA...