BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS
BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS
The SN54 / 74LS168 and SN54 / 74LS169 are fully synchron...
Description
BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS
The SN54 / 74LS168 and SN54 / 74LS169 are fully synchronous 4-stage up/down counters 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, while the SN54 / 74LS169 operates in a Modulo 16 binary 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
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC 16
TC 15
Q0 14
Q1 13
Q2 12
Q3 11
CET 10
PE 9
NOTE: The Flatpak version has the same pinouts (Connection Diagram)...
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