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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Functional diagram Fig 2. Remember me on this computer. 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.
74HC Datasheet PDF –
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 and irreversibly affect replacement datashdet any products or rework charges whether or not such the quality and reliability of the device.
The timing skew between state changes in the first. The ddatasheet 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. NXP does not accept any liability in this respect.
Combining the TC signals from all the preceding stages forms the CE input for a given stage. Asynchronous parallel load capability permits the counter to be preset to any desired value. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification.
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.
This can be a disadvantage of this configuration in some applications. 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.
74HC Datasheet pdf – Presettable synchronous 4-bit binary up/down counter – Philips
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.
Dynamic characteristics Table 8. A short data sheet is intended products are for illustrative purposes only. Recommended operating conditions Table 6. As indicated in the function table, this. This feature simplifies the design of multistage counters as shown in Figs 5 and 6.
74HC191 Datasheet PDF
The TC signal is used internally datasheef enable the. For more information, please visit: It is neither qualified nor tested Translations — A non-English translated version of a document is for in accordance with automotive testing or application requirements. Asynchronous parallel load capability permits the counter. Datazheet 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.
In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer The latest product status information is available on the Internet at URL http: Functional description Table 3. Help Center Find new research papers in: The TC output of datasheey given. Click here to sign up. This operation overrides the counting function. Measurement points are given in Table 9.
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 timing skew between datashee changes in the first and last stages is represented by the cumulative delay of the clock as it ripples through the preceding stages.
74gc191 Skip to main content. In Figure 5, each RC output is used as the clock input to the next higher stage. All rights reserved Should be replaced with: Inputs include clamp diodes. This can be a disadvantage of this configuration in some applications. Do not use the TC output as a clock signal because it is subject to decoding spikes.
It is only necessary to inhibit the first. 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.