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74HC574 Datasheet(PDF) 6 Page - NXP Semiconductors |
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74HC574 Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 7 page December 1990 6 Philips Semiconductors Product specification Octal D-type flip-flop; positive edge-trigger; 3-state 74HC/HCT574 DC CHARACTERISTICS FOR 74HCT For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”. Output capability: bus driver ICC category: MSI Note to HCT types The value of additional quiescent supply current ( ∆ICC) for a unit load of 1 is given in the family specifications. To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below. AC CHARACTERISTICS FOR 74HCT GND = 0 V; tr =tf = 6 ns; CL = 50 pF INPUT UNIT LOAD COEFFICIENT Dn OE CP 0.5 1.25 1.5 SYMBOL PARAMETER Tamb (°C) UNIT TEST CONDITIONS 74HCT VCC (V) WAVEFORMS +25 −40 to +85 −40 to +125 min. typ. max. min. max. min. max. tPHL/ tPLH propagation delay CP to Qn 18 33 41 50 ns 4.5 Fig.6 tPZH/ tPZL 3-state output enable time OE to Qn 19 33 41 50 ns 4.5 Fig.7 tPHZ/ tPLZ 3-state output disable time OE to Qn 16 28 35 42 ns 4.5 Fig.7 tTHL/ tTLH output transition time 5 12 15 18 ns 4.5 Fig.6 tW clock pulse width HIGH or LOW 16 7 20 24 ns 4.5 Fig.6 tsu set-up time Dn to CP 12 3 15 18 ns 4.5 Fig.8 th hold time Dn to CP 5 −1 5 5 ns 4.5 Fig.8 fmax maximum clock pulse frequency 30 69 24 20 MHz 4.5 Fig.6 |
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