MC74F269 Overview
MC74F269 8-BIT BIDIRECTIONAL BINARY COUNTER The MC74F269 is a fully synchronous 8-stage up/down counter featuring a preset capability for programmable operation, carry look-ahead for easy cascading and a U/D input to control the direction of counting. All state changes, whether in counting or parallel loading, are initiated by the rising edge of the clock. MC74F269 FUNCTION TABLE Inputs Operating Mode Parallel Load...
MC74F269 Key Features
- X X CEP X X
- l h X CET X X
- l X h PE
- l h h h h Pn
- h X X X X Outputs Qn L H Count Up Count Down qn qn TC (a) (a) (a) (a) (a) H H = HIGH voltage level steady sta
- = LOW voltage level one set-up time prior to the LOW-to-HIGH clock transition X = Don’t care q = Lower case le