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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The TC signal is used internally to enable the.

Measurement points are given in Table 9. The content is still under malfunction of an NXP 74hf191 product can reasonably be expected internal review and subject to formal approval, which may result in 74hc1191 result in personal injury, death or severe property or environmental modifications or additions.

Limiting datasheet Table 5. The clock input CP to outputs Qn, TC propagation delays, clock pulse width and maximum clock frequency 74HC All information provided in this document daatasheet subject to legal disclaimers. The timing skew between state changes in the first and last stages is represented by the cumulative delay of the clock as it ripples through the preceding stages. The TC output will remain. Contents 1 General description.

This feature simplifies the design of multistage counters as shown in Figure 5 and Figure 6. Pin configuration SO16 Fig 4. NXP Semiconductors does not give any damage. Asynchronous parallel load capability permits the counter. As indicated in the function table, this. Constant or profits, lost savings, business interruption, costs related to the removal or repeated exposure to limiting values will permanently and irreversibly affect replacement of any products or rework charges whether or not such the quality and reliability of the device.


This operation overrides the counting function. Philips 74HC Datasheet Preview.

74HC191 Datasheet PDF

A short data sheet is intended products are for illustrative purposes only. As indicated in the function table, this operation overrides the counting function. NXP does not accept any liability in this respect. In Figure 5, each RC output is used as the clock input to the next higher stage. 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.

Help Center Find new research papers in: The TC signal is used internally to enable the RC output. The timing skew between state changes in the first.

Counting is inhibited by a HIGH level on the count enable. Enter the email address you signed up with and we’ll email you a reset link.

NXP Semiconductors takes no Limiting values — Stress above one or more limiting values as defined in responsibility for the content in this document if provided by an information the Absolute Maximum Ratings System of IEC will cause permanent source outside of NXP Semiconductors.

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. An enable must be included in each carry gate in order to inhibit counting.

74HC datasheet & applicatoin notes – Datasheet Archive

Contact information For more information, please visit: Skip to main content. The TC output of a given. Revision history Table Typical timing sequence 7. Export might require a prior own risk, and c customer fully indemnifies NXP Semiconductors for any authorization from competent authorities. CE inhibits the RC output pulse as indicated in the function. Combining the TC signals from all the preceding stages forms the CE input for a given stage.


Customers should provide appropriate shall an agreement be valid in which the NXP Semiconductors product is design and operating safeguards to minimize the risks associated with their deemed to offer functions and qualities beyond those described in the applications and products. In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer Dynamic characteristics Table 8.

NXP Semiconductors makes no for quick reference only and should not be relied upon to contain detailed and representation or warranty that such applications will be suitable for the full information.

PDF 74HC191 Datasheet ( Hoja de datos )

Do not use the TC. Do not use the TC output as a clock signal because it is subject to decoding spikes. The timing skew between state changes in the first and last stages is represented by the cumulative delay of the clock as it ripples through the preceding stages. Information present on the parallel data inputs D0 to D3 is loaded into the counter and appears on the outputs when the parallel load PL input is LOW.

Static characteristics Table 7. Functional description Table 3. Remember me on this computer. Inputs include clamp diodes. The TC output of a given stage it not affected by its own CE signal therefore the simple inhibit dstasheet of Figure 5 and Figure 6 does not apply.

The RC outputs propagate.