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SN74LS168
BCD DECADE
16 BINARY SYNCHRONOUS
BI-DIRECTIONAL
COUNTERS
The SN54 / 74LS168 is a 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
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SN74LS168 Datasheet
