The 74ahcahct74 are highspeed sigate cmos devices and are pin compatible with low power schottky ttl lsttl. The parametric values defined in the electricalcharacteristics tables are not guaranteed at the absolute maximum ratings. They offer active LOW, high sink current outputs for driving indicators directly. Fas series hybrid storage systems datasheet netapp. We would like to show you a description here but the site wont allow us. Lib this library contains general schematic symbols such as resistors, capacitors, diodes and transistors.

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It only takes a minute to sign up. Hello I have to pilot a CMOS input 5V chip device with a flip flop with the lowest possible delay to minimize clock jitter.

Signal is about I would use 74AS74 because this should have one third of propagation delay vs 74HC74 hence one third of clock jitter probability, I suppose , but I would need a pull-up resistor to reach CMOS input voltage levels. Websites recommends from 10K to 2. I would use 1Kohm. Is it ohm still safe and better? But which is the maximum speed or propagation delay of a 74AS74 with a pull-up resistor? Does the pull-up resistor jeopardise the 74AS speed advantages vs 74HC? PS: don't want to use 74AC or other logic families.

Question is only about 74AS vs 74HC. Check the datasheet of the device, there is a maximum output current for ViL when the device is high ViH will pull little addtional current through the pull up. Does the pull-up resistor jeopardize the 74AS speed advantages vs 74HC? A pull up resistor can also introduce more noise if you have a noisy Vcc, to accurately determine the phase noise a simulation would be best. There is no specification for jitter in the datasheets of these devices, so it will need to be measured.

You can however understand the sources of jitter and work to eliminate them:. Shot noise: electron and hole noise in semiconductors in which the magnitude is governed by bias current and measurement bandwidth. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 1 year, 6 months ago. Active 2 months ago. Viewed times. Gianluca G Gianluca G 1 1 silver badge 10 10 bronze badges. Do you mean "inputting"?

Adding a resistor doesn't usually affect prop delays. Active Oldest Votes. To address 2 , you need to bring up the external node voltages quickly. I'd operate the 74S on 5. That speeds up the output. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast JavaScript is ready to get its own place. Featured on Meta. What posts should be escalated to staff using [status-review], and how do I….

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74AS74 Texas Instruments Authorized Resource & Competitive Price

Change Language English. Product Catalog. We are offering 74AS74 for competitive price in the global market, please send us a quota request for pricing. Thank you! The 74AS74 Texas Instruments of Worldway Electronics are carefully chosen, undergo stringent quality control and are successfully meet at all required standards. The 74AS74 is from factory excess stock inventory or franchised distributors.


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