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MM74C925 - 4-Digit Counters with Multiplexed

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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📁 Similar Datasheet

Part Number Description Manufacturer
MM74C925 4-Digit Counters National
MM74C922 16 / 20-Key Encoder National
MM74C923 16 / 20-Key Encoder National
MM74C926 4-Digit Counters with Multiplexed 7-Segment Output Drivers National
MM74C927 4-Digit Counters with Multiplexed 7-Segment Output Drivers National

Other Datasheets by Fairchild (onsemi)

Part Number Description
MM74C922 16-Key Encoder
MM74C923 20-Key Encoder
MM74C926 4-Digit Counters
MM74C90 4-Bit Decade Counter 4-Bit Binary Counter
MM74C901 Hex Inverting TTL Buffer

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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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