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CD54HC191 Datasheet Synchronous Up/Down Counters

Manufacturer: Texas Instruments

Download the CD54HC191 datasheet PDF. This datasheet also includes the CD54HC190 variant, as both parts are published together in a single manufacturer document.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (CD54HC190-etcTI.pdf) that lists specifications for multiple related part numbers.

General Description

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

Presetting the counter to the number on preset data inputs (A−D) is accomplished by a low asynchronous parallel load (LOAD) input.

Counting occurs when LOAD is high, count enable (CTEN) is low, and the down/up (D/U) input is either high for down counting or low for up counting.

Overview

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 .

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More Datasheets from Texas Instruments

Part Number Description
CD54HC190 Synchronous Up/Down Counters
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CD54HC195 4-Bit Parallel Access Register
CD54HC10 Triple 3-Input NAND Gates
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CD54HC109 Dual J-K Flip-Flop
CD54HC10F Triple 3-Input NAND Gates
CD54HC11 Triple 3-Input AND Gate