54AC169DMQB. National Semiconductor, 54AC169DMQB. Datasheet - Page 3

• Manufacturer Part Number: 54AC169DMQB.
• Manufacturer: National Semiconductor

Specifications of 54AC169DMQB.

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Functional Description
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 = Q
3. Down: TC = Q
Mode Select Table
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
PE
H
H
H
H
L
CEP
H
X
L
L
X
0
CET
• Q
X
X
H
L
L
0
1
• Q
• Q
1
2
U/D
• Q
Q
X
H
X
X
L
3
2
• (Up) • CET
• Q
3
Load (P
Count Up (Increment)
Count Down (Decrement)
No Change (Hold)
No Change (Hold)
• (Down) • CET
Action on Rising
Clock Edge
n
(Continued)
to Q
n
)
3
State Diagrams
DS100276-6
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