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74HC374D 데이터시트(PDF) 6 Page - NXP Semiconductors |
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74HC374D 데이터시트(HTML) 6 Page - NXP Semiconductors |
6 / 8 page December 1990 6 Philips Semiconductors Product specification Octal D-type flip-flop; positive edge-trigger; 3-state 74HC/HCT374 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 =50pF INPUT UNIT LOAD COEFFICIENT OE CP Dn 1.25 0.90 0.35 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 16 32 40 48 ns 4.5 Fig.6 tPZH/ tPZL 3-state output enable time OE to Qn 16 30 38 45 ns 4.5 Fig.7 tPHZ/ tPLZ 3-state output disable time OE to Qn 18 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 19 11 24 29 ns 4.5 Fig.6 tsu set-up time Dn to CP 12 7 15 18 ns 4.5 Fig.8 th hold time Dn to CP 5 −3 5 5 ns 4.5 Fig.8 fmax maximum clock pulse frequency 26 44 21 17 MHz 4.5 Fig.6 |
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