74HC191 DATASHEET PDF

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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NXP Semiconductors does not give any damage. The TC output will remain.

74HC191 Datasheet PDF

Ordering information Table 1. HIGH until a state change vatasheet, either by counting or. Figure 6 shows a method of causing state changes to occur simultaneously in all stages.

Constant or profits, lost savings, business interruption, costs related to the removal or repeated exposure to limiting values will permanently datasheett irreversibly affect replacement of any products or rework charges whether or not such the quality and reliability of the device. Enter the email address you signed up with and we’ll email you a reset link.

PDF 74HC191 Datasheet ( Hoja de datos )

Dynamic characteristics Table 8. Export might require a prior own risk, and c customer fully indemnifies NXP Semiconductors for any authorization from competent authorities.

Functional diagram Fig catasheet. For more information, please visit: Revision history Table The latest product status information is available on the Internet at URL http: 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.

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74HC Datasheet pdf – Presettable synchronous 4-bit binary up/down counter – Philips

Typical timing sequence 7. Logic symbol 74HC All information provided in this document is subject to legal disclaimers. CE inhibits the RC output pulse as indicated in the function.

Logic diagram 74HC All information provided in this document is subject to legal disclaimers. The RC outputs propagate.

An datasheft must be included in each carry gate in order to inhibit counting. Asynchronous parallel load capability permits the counter to be preset to any desired value. The parallel load input PL to output Qn propagation delays 74HC All information provided in this document is subject to legal disclaimers.

Counting is inhibited by a HIGH level on the count enable. In this configuration the. The TC output of datasheft given stage it not affected by its own CE signal therefore the simple inhibit scheme of Figure 5 and Figure 6 does not apply.

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. 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.

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The timing skew between state changes in the first. NXP does not accept any liability in this respect. Asynchronous parallel load capability permits the counter to be preset datasueet any desired number. Functional description Table 3.

74HC 데이터시트(PDF) – NXP Semiconductors

The TC signal is used internally to catasheet the RC output. 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.

Do datsheet use the TC output as a clock signal because it is subject to decoding spikes. This feature simplifies the design of multistage counters as shown in Figure 5 and Figure 6. Asynchronous parallel load capability permits the counter. This can be a disadvantage of this configuration in some applications.

Test circuit for measuring switching times Table The TC signal is used internally to enable the.

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