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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
Use Table 8-12 to find the fan-out for interfacing the first logic family to drive the second.
TABLE 8-12 Input/output currents for standard devices with a supply voltage of 5 V.
CMOSTTLParameter4000B74HC/HCT74AC/ACT74AHC/AHCT7474LS74AS74ALS74FIIH(max)1 Am1 Am1 Am1 Am40 A20 Am20 Am20 Am20 AmIIL(max)1 Am1 Am1 Am1 Am1.6 mA0.4 mA0.5 mA100 Am0.6 mAIOH(max)0.4 mA4 mA24 mA8 mA0.4 mA0.4 mA2 mA400 mA1.0 mAIOL(max)0.4 mA4 mA24 mA8 mA16 mA8 mA20 mA8 mA20 mA
(a)*74AS to 74AS
(b)*74F to 74F
(c) 74AHC to 74AS
(d) 74HC to 74ALS
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