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MM74C925 - 4-Digit Counters with Multiplexed

Datasheet Summary

Description

The MM74C925, MM74C926, MM74C927 and MM74C928 CMOS counters consist of a 4-digit counter, an internal output latch, NPN output sourcing drivers for a 7-segment display, and an internal multiplexing circuitry with four multiplexing outputs.

Features

  • s Wide supply voltage range: s Guaranteed noise margin: s High noise immunity: 3V to 6V 1V 0.45 VCC (typ. ) s High segment sourcing current: 40 mA @ VCC.
  • 1.6V, VCC = 5V s Internal multiplexing circuitry Design Considerations Segment resistors are desirable to minimize power dissipation and chip heating. The DS75492 serves as a good digit driver when it is desired to drive bright displays. When using this driver with a 5V supply at room temperature, the display can be driven without seg.

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Datasheet preview – MM74C925

Datasheet Details

Part number MM74C925
Manufacturer Fairchild
File Size 97.94 KB
Description 4-Digit Counters with Multiplexed
Datasheet download datasheet MM74C925 Datasheet
Additional preview pages of the MM74C925 datasheet.

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Full PDF Text Transcription

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MM74C925 • MM74C926 • MM74C927 • MM74C928 4-Digit Counters with Multiplexed 7-Segment Output Drivers October 1987 Revised January 1999 MM74C925 • MM74C926 • MM74C927 • MM74C928 4-Digit Counters with Multiplexed 7-Segment Output Drivers General Description The MM74C925, MM74C926, MM74C927 and MM74C928 CMOS counters consist of a 4-digit counter, an internal output latch, NPN output sourcing drivers for a 7-segment display, 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 signal on the Reset input will reset the counter to zero, and reset the carry-out LOW.
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