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74HCT640PW Datasheet(PDF) 5 Page - NXP Semiconductors |
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74HCT640PW Datasheet(HTML) 5 Page - NXP Semiconductors |
5 / 6 page March 1988 5 Philips Semiconductors Product specification Octal bus transceiver; 3-state; inverting 74HC/HCT640 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 An Bn OE DIR 1.50 1.50 1.50 0.90 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 An to Bn; Bn to An 11 22 28 33 ns 4.5 Fig.5 tPZH/ tPZL 3-state output enable time OE, DIR to An; OE, DIR to Bn 18 30 38 45 ns 4.5 Fig.6 tPHZ/ tPLZ 3-state output disable time OE, DIR to An; OE, DIR to Bn 19 30 38 45 ns 4.5 Fig.6 tTHL/ tTLH output transition time 5 12 15 18 ns 4.5 Fig.5 |
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