IC 7405 DATASHEET PDF

description/ordering information. These devices contain six independent inverters. To perform correctly, the open-collector outputs require pullup resistors. Details, datasheet, quote on part number: SN Reel (TR) 3 V ~ V; IC QUAD DIFF PECL DRVR SOIC Specifications: Number of Drivers/Receivers: . Description: The NTE contains six independent inverters in a Lead plastic DIP type package. The open col- lector outputs require pull-up resistors to .

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7405 – 7405 Hex Inverter with Open Collector Output Datasheet

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Therefore, when the input is high, the output is pulled down, but datasheft the input is low, the output is in high impedance.

To get an high level output, you should connect a pull-up resistor between the output and VCC 5V. Or, use the push-pull totem pole output version, i. You can create a “wired-nor” gate, by connecting the outputs of two datasheft more inverters of the ! Take a look at the circuit below: By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject datasyeet these policies.

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Home Questions Tags Users Unanswered. Please datsaheet a scheme of your circuit The current that R1 must provide to “what you are connecting to the output of the gate” e. If you are connecting another datasneet or an input of a digital ICthen you must check its high level voltage and its input current. The high level voltage and the input current input load depend on the particular logic family you are using.

datashwet The 74LS05 datasheet indicates that at 2. A standard TTL – i. There the maximum pull-up resistor value is half the value previously calculated!

Furthermore, the output of the 74LS05 is not ideal, therefore it has no infinite impedance, when the input is datadheet In practice, what dominates is the first constraint. The considerations above set the upper bound resistor value. The lower bound is determined by: The maximum current consumption you can accept.

The output drive capability of your logic gate i. Bonus fact You can create a “wired-nor” gate, by connecting the outputs of two or more inverters of the !

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This adds some safety margin.

It will be smaller at lower output voltages. Using this value, also adds some safety margins.

Values added, as well datashret how to calculate it, and a typical value for “relaxed” low speed, low fanout applications. Got around to testing this myself and it worked, thank you for the thorough and helpful answer! Sign up or log in Sign up using Google. Sign up using Facebook.

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