description. The ‘HC are 4-bit synchronous, reversible, up/down binary counters. Synchronous counting operation is provided by having all flip-flops clocked. 74HC datasheet, 74HC pdf, 74HC data sheet, datasheet, data sheet, pdf, Philips, Presettable synchronous 4-bit binary up/down counter. 74HC Counter ICs are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for 74HC Counter ICs.

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In case of any inconsistency or conflict with the short data sheet, the Customers are responsible for the design and operation of their applications full data sheet shall prevail.

Important notice Dear Customer. Recommended operating conditions Table 6. This feature 74hv191 the design of multistage counters as shown in Figure 5 and Figure 6. It is only necessary to inhibit the first stage to prevent counting in all stages, since a HIGH on CE inhibits the RC output pulse as indicated in the function table.

(PDF) 74HC191 Datasheet download

Nexperia is an industry datashheet supplier of Discrete, Logic and PowerMOS semiconductors with its focus on the automotive, industrial, computing, consumer and wearable application markets In data sheets and application notes which still contain NXP or Philips Semiconductors references, use the references to Nexperia, datwsheet shown below.

Revision history Table NXP Semiconductors does not give any damage. This feature simplifies the design of multistage counters as shown in Figs 5 and 6.


Help Center Find new research papers in: Information present on the parallel data inputs D 0 to D 3 is loaded into the counter and appears on the outputs when the parallel load PL input is LOW. Do not use the TC output as a clock signal because it is subject to decoding spikes.

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The RC outputs propagate. Constant or profits, lost savings, business interruption, costs related to the removal or repeated exposure to 74hcc191 values will permanently and irreversibly affect replacement of any products or rework charges whether or not such the quality and reliability of the device.

Presettable synchronous 4-bit binary.

Typical timing sequence 7. The TC output will remain. Short data sheet — A short data sheet is an extract from a full data sheet Applications — Applications that are described herein for any of these with the same dataaheet type number s and title. Asynchronous parallel load capability permits the counter to be preset to any desired number.

The TC signal is used internally to enable the RC output. If you have any questions related to the data sheet, please contact our nearest sales office via e-mail or telephone details via salesaddresses nexperia.

Combining the TC signals from all the preceding stages forms the CE input for a given stage. The parallel 74hc1991 input PL to output Qn propagation delays 74HC All information 74ch191 in this document is subject to legal disclaimers. In Figure 7, the configuration shown avoids ripple delays and their associated restrictions. The clock input CP to outputs Qn, TC propagation delays, clock pulse width and maximum clock frequency 74HC All information provided in this document is subject to legal disclaimers.


CE inhibits the RC output pulse as indicated in the function.

Contents 1 General description. NXP Semiconductors does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the Asynchronous parallel load capability permits the counter. The TC output of a given.

74HC191 Datasheet

HIGH until a state change occurs, either by counting or. Test circuit for measuring switching times Table Functional description Table 3. NXP does not accept any liability in this respect. Limiting values are stress ratings only and proper operation of the device at these or any other conditions above those given in In no event shall NXP Semiconductors be liable for any indirect, incidental, the Recommended operating conditions section if present or the punitive, special or consequential damages including – without limitation – lost Characteristics sections of this document is not warranted.