Description
fully synchronous 4-stage up/down
counter featuring a preset capability for programmable operation,
carry lookahead for easy cascading and a U/ D input to control the
direction of counting. The SN54/ 74LS168 counts in a BCD decade (8,
4, 2, 1) sequence. All state changes, whether in counting or parallel
loading, are initiated by the LOW-to-HIGH transition of the clock
.
• Low Power Dissipation 100 mW Typical
• High-Speed Count Frequency 30 MHz Typical
• Fully Synchronous Operation
• Full Carry Lookahead for Easy Cascading
• Single Up/ Down Control Input
• Positive Edge-Trigger Operation
• Input Clamp Diodes Limit High-Speed Termination Effects
