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CD54HC190 - Synchronous Up/Down Counters

General Description

The CD54/74HC190 are asynchronously presettable BCD decade counters, whereas the CD54/74HC191 and CD54/74HCT191 are asynchronously presettable binary counters.

D) is accomplished by a low asynchronous parallel

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CD54HC191 Synchronous Up/Down Counters
CD54HC192 Presettable Synchronous 4-Bit Up/Down Counters
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CD54HC194 4-Bit Bidirectional Universal Shift Register
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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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CD54HC190, CD74HC190 CD54HC191, CD74HC191, CD54HCT191, CD74HCT191 SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL SCHS275E − MARCH 2002 − REVISED OCTOBER 2003 D 2-V to 6-V VCC Operation (’HC190, 191) D 4.5-V to 5.5-V VCC Operation (’HCT191) D Wide Operating Temperature Range of −55°C to 125°C D Synchronous Counting and Asynchronous Loading D Two Outputs for n-Bit Cascading D Look-Ahead Carry for High-Speed Counting D Balanced Propagation Delays and Transition Times D Standard Outputs Drive Up To 15 LS-TTL Loads D Significant Power Reduction Compared to LS-TTL Logic ICs CD54HC190, 191; CD54HCT191 . . . F PACKAGE CD74HC190 . . . E, NS, OR PW PACKAGE CD74HC191, CD74HCT191 . . .