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 (L.
y 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. The counter is decremented or incremented synchronously with the low-to-high transition of the clock. ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING CD74HC190E CD74HC190E PDIP − E Tube of 25 CD74HC191E CD74HCT191E CD74HC191E CD74HCT191E Tube of 40 CD74HC191M SOIC − M R.
Distributor | Stock | Price | Buy |
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No. | Part # | Manufacture | Description | Datasheet |
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1 | CD54HCT193 |
Texas Instruments |
Presettable Synchronous 4-Bit Up/Down Counters | |
2 | CD54HCT10 |
Texas Instruments |
Triple 3-Input NAND Gates | |
3 | CD54HCT109 |
Texas Instruments |
Dual J-K Flip-Flop | |
4 | CD54HCT10F |
Texas Instruments |
Triple 3-Input NAND Gates | |
5 | CD54HCT11 |
Texas Instruments |
High-Speed CMOS Logic Triple 3-Input AND Gate | |
6 | CD54HCT112 |
Texas Instruments |
Dual J-K Flip-Flop | |
7 | CD54HCT123 |
Texas Instruments |
High-Speed CMOS Logic Dual Retriggerable Monostable Multivibrators | |
8 | CD54HCT125 |
Texas Instruments |
High-Speed CMOS Logic Quad Buffer | |
9 | CD54HCT126 |
Texas Instruments |
High-Speed CMOS Logic | |
10 | CD54HCT132 |
Texas Instruments |
Quadruple 2-Input NAND Gates | |
11 | CD54HCT132J |
Texas Instruments |
Quadruple 2-Input NAND Gates | |
12 | CD54HCT138 |
Texas Instruments |
High-Speed CMOS Logic 3 to 8-Line Decoder/Demultiplexer Inverting/Noninverting | |
13 | CD54HCT138F |
Texas Instruments |
High-Speed CMOS Logic 3 to 8-Line Decoder/Demultiplexer Inverting/Noninverting | |
14 | CD54HCT139 |
Texas Instruments |
Dual 2- to 4-Line Decoder/Demultiplexer | |
15 | CD54HCT14 |
Texas Instruments |
Hex Inverting Schmitt Trigger |