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 the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer Logic symbol 74HC All information provided in vatasheet document is subject 7h4c191 legal disclaimers. It is only necessary to inhibit the first. As indicated in the function table, this operation overrides the counting function.

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.

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.

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.

The TC signal is used internally to enable the RC output. Remember me on this computer. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.


This operation overrides the counting function. Combining the TC signals. Combining the TC signals from all the preceding stages forms the CE input for a given stage.

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 product type number s and title. The TC output of a given stage it not affected by its own CE signal therefore the simple inhibit scheme of Figs 5 and 6 does not apply.

A short data sheet is intended products are for illustrative purposes only. Counting is inhibited by a HIGH level on the count enable.

All referenced brands, product names, service names and trademarks product for such automotive applications, use and specifications, and b are the property of their respective owners. In this configuration the. Export might require a prior own risk, and c customer fully indemnifies NXP Semiconductors for any authorization from competent authorities. Static characteristics Table 7.

NXP Semiconductors does not give any damage. Important notice Dear Customer. Do not use the TC. Ordering information Table 1.

74HC (Philips) – Presettable Synchronous 4-bit Binary Up/down Counter, Counters

This feature simplifies the design of multistage counters as shown in Figs 5 and 6. 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 Datasehet TC signal is used internally to enable the RC output.

Recommended operating conditions Table 6.

Asynchronous parallel load capability permits the counter to be preset to any desired number. An enable must be included in each carry gate in order to inhibit counting. Combining the TC signals from all the preceding stages forms the CE input 74uc191 a given stage.

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. 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 74bc191.


As indicated in the function table, this. All rights reserved Should be replaced with: The TC signal is used internally to enable the. Functional description Table 3.

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. This can be a disadvantage of this configuration in some applications.

In Figure 7, the configuration shown avoids ripple delays and their associated restrictions. The content is still under malfunction of an NXP Semiconductors product can reasonably be expected internal review and subject to formal approval, which may result in to result in personal injury, death or severe property or environmental modifications or additions.

Product data sheet Rev. Presettable synchronous 4-bit binary. Click here to sign up.

74HC191 Datasheet PDF

Nexperia is an industry leading 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, as shown below.

Typical timing sequence 7. Pin configuration SO16 Fig 4. Asynchronous parallel load capability permits the counter. Help Center Find new research papers in: Figure 6 shows a method datassheet causing state changes to occur simultaneously in all stages.