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MC14516B Arkusz danych(PDF) 6 Page - ON Semiconductor |
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MC14516B Arkusz danych(HTML) 6 Page - ON Semiconductor |
6 / 11 page MC14516B http://onsemi.com 6 TOGGLE FLIP−FLOP PE C T Q Q P PARALLEL IN FLIP−FLOP FUNCTIONAL TRUTH TABLE Preset Enable Clock T Qn+1 1 X X Parallel In 0 0 Qn 0 1 Qn 0 X Qn X = Don’t Care Figure 2. Switching Time Waveforms VDD VSS VDD VSS VDD VSS VDD VSS VOL VOH RESET PRESET ENABLE CARRY IN OR UP/DOWN CLOCK Q0 OR CARRY OUT trem tsu trem th tTLH tPLH tPHL tPLH tTHL 50% 50% 90% 10% 50% 90% 10% CARRY OUT ONLY tw(H) tw(H) tw 1 fcl PIN DESCRIPTIONS INPUTS P0, P1, P2, P3, Preset Inputs (Pins 4, 12, 13, 3) — Data on these inputs is loaded into the counter when PE is taken high. Carry In, (Pin 5) — This active−low input is used when Cascading stages. Carry In is usually connected to Carry Out of the previous stage. While high, Clock is inhibited. Clock, (Pin 15) — Binary data is incremented or decremented, depending on the direction of count, on the positive transition of this input. OUTPUTS Q0, Q1, Q2, Q3, Binary outputs (Pins 6, 11, 14, 2) — Binary data is present on these outputs with Q0 corresponding to the least significant bit. Carry Out, (Pin 7) — Used when cascading stages, Carry Out is usually connected to Carry In of the next stage. This synchronous output is active low and may also be used to indicate terminal count. CONTROLS PE, Preset Enable, (Pin 1) — Asynchronously loads data on the Preset Inputs. This pin is active high and inhibits the clock when high. R, Reset, (Pin 9) — Asynchronously resets the Q out− puts to a low state. This pin is active high and inhibits the clock when high. Up/Down, (Pin 10) — Controls the direction of count, high for up count, low for down count. SUPPLY PINS VSS, Negative Supply Voltage, (Pin 8) — This pin is usually connected to ground. VDD, Positive Supply Voltage, (Pin 16) — This pin is connected to a positive supply voltage ranging from 3.0 V to 18 V. |
Podobny numer części - MC14516B |
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Podobny opis - MC14516B |
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