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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PDF 74HC191 Datasheet ( Hoja de datos )
Typical timing sequence 7. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification.
Functional description Table 3. Combining the TC signals from all the preceding stages forms the CE input for a given stage. Inputs include clamp diodes. Recommended operating conditions Table 6. The 74h191 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.
Functional diagram Fig 2. In Figure 5, each RC output is used as the clock input to the next higher stage. NXP does not accept any liability in this respect.
74HC 데이터시트(PDF) – NXP Semiconductors
This feature simplifies the design of multistage counters as shown in Figs 5 and 6. Contents 1 General description. This can be a disadvantage of this configuration in some applications. Combining the TC signals from all the preceding stages forms the CE input for a given stage. This document supersedes and replaces all information supplied prior No offer to sell or license — Nothing in this document may be interpreted or to the publication datasheeh.
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Information present on the parallel datasheeh inputs D0 to D3 is loaded into the counter and appears on the outputs when the parallel load PL input is LOW. For detailed and full information see the relevant full data specified use without further testing or modification.
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Do not use the TC output as a clock signal because it is subject to decoding spikes. Limiting values Table 5. NXP Semiconductors does not give any damage. Counting is inhibited by a HIGH level on the count enable. Combining the TC signals. 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. Product [short] data sheet Production This document contains the product specification.
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. In Figure 7, the configuration shown avoids ripple delays and their associated restrictions.
Do not use the TC output as a clock signal because it is subject to decoding spikes.
This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC. As indicated in the function table, this. Log In Sign Up. 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.
The TC output of a given. 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. It is only necessary to inhibit the first. This operation overrides the counting function. Do not use the TC.
Logic diagram 74HC All information provided in this document is subject to legal disclaimers. In this configuration the.
The TC signal is used internally to enable the RC output.