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74HCT253 Datasheet(PDF) 6 Page - NXP Semiconductors |
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74HCT253 Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 7 page December 1990 6 Philips Semiconductors Product specification Dual 4-input multiplexer; 3-state 74HC/HCT253 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 ( ∆I CC) 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 1In 2In nOE S0 S1 0.40 0.40 1.10 1.10 1.10 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 1In to nY; 2In to nY 20 38 48 57 ns 4.5 Fig.6 tPHL/ tPLH propagation delay Sn to nY 22 40 50 60 ns 4.5 Fig.6 tPZH/ tPZL 3-state output enable time nOE to nY 14 30 38 45 ns 4.5 Fig.7 tPHZ/ tPLZ 3-state output disable time nOE to nY 13 30 38 45 ns 4.5 Fig.7 tTHL/ tTLH output transition time 5 12 15 18 ns 4.5 Fig.6 |
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