4-Digit Counters With Multiplexed

The MM74C925 MM74C926 MM74C927 and MM74C928 CMOS Counters consist of a 4-digit Counter an internal out- put latch, NPN output sourcing drivers for a 7-segment dis- play, and an internal multiplexing circuitry with four multiplexing outputs. The multiplexing circuit has its own free-running Oscillator and requires no external Clock The Counters advance on negative edge of Clock A HIGH sig- nal on the Reset input will reset the Counter to zero, and reset the carry-out LOW. A LOW signal on the Latch Enable input will latch the number in the Counters into the internal output Latches A HIGH signal on Display Select input will select the number in the Counter to be displayed; a LOW level signal on the Display Select will select the number in the output latch to be displayed. The MM74C925 is a 4-decade Counter and has Latch Enable, Clock and Reset inputs. The MM74C926 is like the MM74C925 except that it has a Display select and a carry-out used for cascading Counters The carry-out signal goes HIGH at 6000, goes back LOW at 0000. The MM74C927 is like the MM74C926 except the second most significant digit divides by 6 rather than 10. Thus, if the Clock input frequency is 10 Hz, the Display would read tenths of seconds and minutes (i.e., 9:59.9). The MM74C928 is like the MM74C926 except the most sig- nificant digit divides by 2 rather than 10 and the carry-out is an overflow indicator which is HIGH at 2000, and it goes back LOW only when the Counter is reset. Thus, this is a 3-digit Counter By Fairchild Semiconductor
Part Manufacturer Description Datasheet Samples
MM74C925N Rochester Electronics LLC Display Driver Counter,
MM74C925 's PackagesMM74C925 's pdf datasheet
MM74C927 PDIP
MM74C928 PDIP
MM74C925N PDIP
MM74C927N PDIP
MM74C928N PDIP




MM74C925 Pinout, Pinouts
MM74C925 pinout,Pin out
This is one package pinout of MM74C925,If you need more pinouts please download MM74C925's pdf datasheet.

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