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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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All rights reserved Should be replaced with: Counting is inhibited by 774hc191 HIGH level on the count enable. The TC signal is used internally to enable the.

fatasheet 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. Pin configuration SO16 Fig 4.

The parallel load input PL to clock CP recovery times, parallel load pulse width and output Qn transition times 74HC All information provided in this document is subject to legal disclaimers. HIGH until a state change occurs, either by counting or.

An enable must be included in each carry. In Figure 7, the configuration shown avoids ripple delays and their associated restrictions.

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Contents 1 General description. Asynchronous parallel load capability permits the counter. As indicated in the function table, this operation overrides the counting function.


The latest product status information is available on the Internet at URL http: Functional description Table 3. Logic diagram 74HC All information provided in this document is subject to legal disclaimers. Contact information For more information, please visit: Functional diagram Fig 2.

Export might require a prior own risk, and c customer fully indemnifies NXP Semiconductors for any authorization from competent authorities. This can be a disadvantage of this configuration datashfet some applications.

NXP Semiconductors does not give any damage. 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 datxsheet or rework charges whether or not such the quality and reliability of the device.

Measurement points are given in Table 9. The RC outputs propagate. Test circuit for measuring switching times Table Do not use the TC. Combining the TC signals. Figure 6 shows a method of causing state changes to occur simultaneously in all stages. 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.

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. Asynchronous parallel load capability permits the counter to be preset to any desired number.


74HC Datasheet PDF – Hitachi -> Renesas Electronics

For detailed and full information see the relevant full data specified use without further testing or modification. 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.

Combining the TC signals from all the preceding stages forms the CE input for a given stage. 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 dataheet.

74HC191 Datasheet

Limiting values Table 5. 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.

Presettable synchronous 4-bit binary.