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CD74HC4520 - Dual Synchronous Counters

Download the CD74HC4520 datasheet PDF. This datasheet also covers the CD74HC4518 variant, as both devices belong to the same dual synchronous counters family and are provided as variant models within a single manufacturer datasheet.

General Description

The CD74HC4518 is a dual BCD up-counter.

The ’HC4520 and CD74HCT4520 are dual binary up-counters.

Each device consists of two independent internally synchronous 4-stage counters.

Key Features

  • Positive or Negative Edge Triggering.
  • Synchronous Internal Carry Propagation.
  • Fanout (Over Temperature Range) - Standard Outputs.
  • 10 LSTTL Loads - Bus Driver Outputs.
  • . . . 15 LSTTL Loads.
  • Wide Operating Temperature Range . . . -55oC to 125oC.
  • Balanced Propagation Delay and Transition Times.
  • Significant Power Reduction Compared to LSTTL Logic ICs.
  • HC Types - 2V to 6V Operation - High Noise I.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (CD74HC4518-etcTI.pdf) that lists specifications for multiple related part numbers.

Other Datasheets by Texas Instruments

Part Number Description
CD74HC4520E Dual Synchronous Counters
CD74HC4520M Dual Synchronous Counters
CD74HC4510 High-Speed CMOS Logic
CD74HC4511 BCD-TO-7 SEGMENT LATCH/DECODER/DRIVERS
CD74HC4514 4-TO-16 LINE DECODER/DEMULTIPLEXER
CD74HC4514E 4-TO-16 LINE DECODER/DEMULTIPLEXER
CD74HC4514M 4-TO-16 LINE DECODER/DEMULTIPLEXER
CD74HC4515 4-TO-16 LINE DECODER/DEMULTIPLEXER
CD74HC4515E 4-TO-16 LINE DECODER/DEMULTIPLEXER
CD74HC4515M 4-TO-16 LINE DECODER/DEMULTIPLEXER

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.

View original datasheet text
Data sheet acquired from Harris Semiconductor SCHS216D November 1997 - Revised October 2003 CD74HC4518, CD54HC4520, CD74HC4520, CD74HCT4520 High-Speed CMOS Logic Dual Synchronous Counters [ /Title (CD74 HC451 8, CD74 HC452 0, CD74 HCT45 20) /Subject Features • Positive or Negative Edge Triggering • Synchronous Internal Carry Propagation • Fanout (Over Temperature Range) - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads • Wide Operating Temperature Range . . . -55oC to 125oC • Balanced Propagation Delay and Transition Times • Significant Power Reduction Compared to LSTTL Logic ICs • HC Types - 2V to 6V Operation - High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V • HCT Types - 4.5V to 5.