Datasheet Details
| Part number | CD54HCT191 |
|---|---|
| Manufacturer | Texas Instruments |
| File Size | 1.29 MB |
| Description | Synchronous Up/Down Counters |
| Download | CD54HCT191 Download (PDF) |
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Download the CD54HCT191 datasheet PDF. This datasheet also includes the CD54HC190 variant, as both parts are published together in a single manufacturer document.
| Part number | CD54HCT191 |
|---|---|
| Manufacturer | Texas Instruments |
| File Size | 1.29 MB |
| Description | Synchronous Up/Down Counters |
| Download | CD54HCT191 Download (PDF) |
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/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.
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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| Part Number | Description |
|---|---|
| CD54HCT193 | Presettable Synchronous 4-Bit Up/Down Counters |
| CD54HCT10 | Triple 3-Input NAND Gates |
| CD54HCT109 | Dual J-K Flip-Flop |
| CD54HCT10F | Triple 3-Input NAND Gates |
| CD54HCT11 | High-Speed CMOS Logic Triple 3-Input AND Gate |
| CD54HCT112 | Dual J-K Flip-Flop |
| CD54HCT123 | High-Speed CMOS Logic Dual Retriggerable Monostable Multivibrators |
| CD54HCT125 | High-Speed CMOS Logic Quad Buffer |
| CD54HCT126 | High-Speed CMOS Logic |
| CD54HCT132 | Quadruple 2-Input NAND Gates |