54f191 National Semiconductor Corporation, 54f191 Datasheet
54f191
Available stocks
Related parts for 54f191
54f191 Summary of contents
Page 1
... Military 74F191PC 54F191DM (Note 2) 74F191SC (Note 1) 74F191SJ (Note 1) 54F191FM (Note 2) 54F191LM (Note 2) Note 1 Devices also available in 13 reel Use suffix Note 2 Military grade device with environmental and burn-in processing Use suffix Logic Symbols TL F 9495–1 IEEE IEC TL F 9495–4 ...
Page 2
Unit Loading Fan Out Pin Names Description CE Count Enable Input (Active LOW) CP Clock Pulse Input (Active Rising Edge) P –P Parallel Data Inputs Asynchronous Parallel Load Input (Active LOW Down Count Control ...
Page 3
Logic Diagram Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays FIGURE 1 n-Stage Counter Using Ripple Clock FIGURE 2 Synchronous n-Stage Counter Using Ripple Carry ...
Page 4
Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Storage Temperature b Ambient Temperature under Bias b Junction Temperature under Bias b Plastic b V Pin Potential ...
Page 5
AC Electrical Characteristics Symbol Parameter f Maximum Count Frequency max t Propagation Delay PLH PHL n t Propagation Delay PLH PHL t Propagation Delay PLH PHL t Propagation ...
Page 6
AC Operating Requirements Symbol Parameter t (H) Setup Time HIGH or LOW (H) Hold Time HIGH or LOW (L) Setup Time LOW ...
Page 7
Physical Dimensions inches (millimeters) 20-Lead Ceramic Leadless Chip Carrier (L) 16-Lead Ceramic Dual-In-Line Package (D) NS Package Number E20A NS Package Number J16A 7 ...
Page 8
Physical Dimensions inches (millimeters) (Continued) 16-Lead (0 150 Wide) Molded Small Outline Package JEDEC (S) 16-Lead (0 300 Wide) Molded Small Outline Package EIAJ (SJ) NS Package Number M16A NS Package Number M16D 8 ...
Page 9
Physical Dimensions inches (millimeters) (Continued) 16-Lead (0 300 Wide) Molded Dual-In-Line Package (P) NS Package Number N16E 9 ...
Page 10
Physical Dimensions inches (millimeters) (Continued) LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 ...