74F14 ,Hex Inverter Schmitt TriggerGeneral Descriptionback to effectively speed-up slow input transition, and pro-The 74F14 contains s ..
74F148 ,8-Line to 3-Line Priority Encoder74F1488-Lineto3-LinePriorityEncoderAugust199574F1488-Lineto3-LinePriorityEncoderGeneralDescription
74F148PC ,8-Line to 3-Line Priority EncoderFeaturesThe F148 provides three bits of binary coded output repre-
74F14
Hex Inverter Schmitt Trigger
74F14 Hex Inverter Schmitt Trigger March 1988 Revised September 2000 74F14 Hex Inverter Schmitt Trigger totem-pole output. The Schmitt trigger uses positive feed General Description back to effectively speed-up slow input transition, and pro- The 74F14 contains six logic inverters which accept stan- vide different input threshold voltages for positive and neg- dard TTL input signals and provide standard TTL output ative-going transitions. This hysteresis between the levels. They are capable of transforming slowly changing positive-going and negative-going input thresholds (typi- input signals into sharply defined, jitter-free output signals. cally 800 mV) is determined internally by resistor ratios and In addition, they have a greater noise margin than conven- is essentially insensitive to temperature and supply voltage tional inverters. variations. Each circuit contains a Schmitt trigger followed by a Dar- lington level shifter and a phase splitter driving a TTL Ordering Code: Order Number Package Number Package Description 74F14SC M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow 74F14SJ M14D 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74F14PC N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbol Connection Diagram IEEE/IEC Unit Loading/Fan Out Function Table Input I /I Input Output U.L. IH IL Pin Names Description Output I /I HIGH/LOW AO OH OL I Input 1.0/1.0 20 μA/−0.6 mA LH n HL O Output 50/33.3 −1 mA/20 mA n H = HIGH Voltage Level L = LOW Voltage Level © 2000 DS009461
