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54ACT169F View Datasheet(PDF) - National ->Texas Instruments

Part NameDescriptionManufacturer
54ACT169F 4-Stage Synchronous Bidirectional Counter National-Semiconductor
National ->Texas Instruments National-Semiconductor
54ACT169F Datasheet PDF : 10 Pages
1 2 3 4 5 6 7 8 9 10
Functional Description (Continued)
the TC signal is derived by decoding the flip-flop states,
there exists the possibility of decoding spikes on TC. For this
reason the use of TC as a clock signal is not recommended
(see logic equations below).
1. Count Enable = CEP CET PE
2. Up: TC = Q0Q1Q 2Q3(Up)CET
3. Down: TC = Q0Q1Q2Q3 (Down)CET
Mode Select Table
PE CEP CET U/D
Action on Rising
Clock Edge
L
X
X
X Load (Pn to Qn)
H
L
L
H Count Up (Increment)
H
L
L
L Count Down (Decrement)
H
H
X
X No Change (Hold)
H
X
H
X No Change (Hold)
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
State Diagrams
DS100276-6
3
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