Datasheet4U Logo Datasheet4U.com

HD74HC669 - Synchronous Up/Down 4-bit binary Counter

Download the HD74HC669 datasheet PDF. This datasheet also covers the HD74HC668 variant, as both devices belong to the same synchronous up/down 4-bit binary counter family and are provided as variant models within a single manufacturer datasheet.

General Description

This synchronous presettable decade counter

Key Features

  • an internal carry look-ahead for cascading in high-speed counting.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (HD74HC668-Renesas.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number HD74HC669
Manufacturer Renesas
File Size 216.77 KB
Description Synchronous Up/Down 4-bit binary Counter
Datasheet download datasheet HD74HC669 Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
HD74HC669 Synchronous UP/Down Decade/4-bit binary Counter Hitachi Semiconductor
HD74HC668 Synchronous UP/Down Decade/4-bit binary Counter Hitachi Semiconductor
HD74HC620 Octal Bus Transceivers Hitachi Semiconductor
HD74HC623 Octal Bus Transceivers Hitachi Semiconductor
HD74HC640 Octal Bus Transceivers Hitachi Semiconductor

Other Datasheets by Renesas

Part Number Description
HD74HC668 Synchronous UP/Down Decade Counter
HD74HC620 Octal Bus Transceivers
HD74HC623 Octal Bus Transceivers
HD74HC640 Octal Bus Transceivers
HD74HC643 Octal Bus Transceivers

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
HD74HC668, HD74HC669 Synchronous UP/Down Decade Counter Synchronous Up/Down 4-bit binary Counter REJ03D0638-0200 (Previous ADE-205-520) Rev.2.00 Mar 30, 2006 Description This synchronous presettable decade counter features an internal carry look-ahead for cascading in high-speed counting applications. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the count-enable inputs and internal gating. This mode of operation helps eliminate the output counting spikes that are normally associated with asynchronous (ripple-clock) counters. A buffered clock input triggers the four master-slave flip-flops on the rising (positive going) edge of the clock waveform.