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MM74C927 - 4-Digit Counters with Multiplexed 7-Segment Output Drivers

Datasheet Summary

Description

These 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

Features

  • Y Y Y Y Wide supply voltage range Guaranteed noise margin High noise immunity High segment sourcing current Internal multiplexing circuitry 3V to 6V 1V 0 45 VCC (typ ) 40 mA VCC b 1 6V VCC e 5V Y 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 segment resistors t.

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Datasheet Details

Part number MM74C927
Manufacturer National
File Size 204.58 KB
Description 4-Digit Counters with Multiplexed 7-Segment Output Drivers
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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 March 1988 MM74C925 MM74C926 MM74C927 MM74C928 4-Digit Counters with Multiplexed 7-Segment Output Drivers General Description These 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 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 wi
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