Functional Diagram and/or Package:
Pin Names
Vdd - Positive Supply Voltage [3V to 15V]
Vss - Ground
CLK - Clock
Q1, Q2, G3, Q4 - Outputs
J1, .J2, J3, J4 - JAM Inputs
PE - Preset Enable
Cl - Gerry ln
CO - Carry Dut
UP/DOWN - Up-Down Selection
D/B - Decede/ Binary Selection
Operation Mode:
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LD and EN are grounded.
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With D/B With a “0” logic level, the circuit counts by tens. If in the “'1” logic level the circuit counts by sixteens.
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If UP/DOWN is held at the “1” logic level, the circuit operates as an up counter and With the pin at the “0” logic level the circuit operates as a down counter.
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The changes in the count occur With the positive transition of the clock.
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CD is “0” for count 9 [bcd] and 15 [binary].
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Em ground stops the count.
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Electrical Characteristics:
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- Applications:
- Programmable Binary/De-cade Counting
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A/D and D/A Conversion
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Up/Down Binary/Decade Counting
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Magnitude end Sign Generators
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Difference Counting
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Observations:
- The up-down control can be changed only When the clock is at the “'1” logic level.
- Cascading: Connecting the DUT pin of the first decade to EN of the second decade, it is possible to drive the circuit from a common clock for fully synchronous operation.
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