March 4, 2019


SN74HC (ACTIVE) Octal Buffers And Line Drivers With 3-State Outputs. Datasheet ( KB). Diagram click to expand contents. Functional Diagram. An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters . 2 × fo) where: 74HC; 74HCT Octal buffer/line driver; 3-state. Product data sheet. Table 1: Quick reference data. GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns.

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If you want more detail, you should start reading about how transistors work, and how they’re used to make the logic gates in the shown diagram. Any way, 74hv244 is very little information about Line Drivers in general. I mean, how the can datashdet the current with just sending the input to the output? The datasheet tells you pretty much everything you need to actually use the part, though NXP does tend to be a bit sparse on internal details.

How does a line driver actually work? So I’ve searched for days for information about the 74HC line driver. Link to AM26LS31 datasheet: The functional diagram on that datasheet omits the power pins, but they are there and must be powered for the part to function. The increased current is able to overcome the capacitance caused by having many devices on a bus.


Eminem – What makes you think the input is connected directly to the output? I think that in order to reduce the current that the FPGA suplies to the servo, I need to put the in between them, thus reducing the “effort” from the Altera.

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 to these policies. Eminem 1 3 8.

This allows you to have multiple line drivers on the same wire, and as long as they properly take turns driving it they can share the single connection.

74HC Datasheet(PDF) – Motorola, Inc

Email Required, but never shown. There are two principal functions of this line driver.

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. That power is used by each buffer element to increase the load it can drive. Jeff Bell 1 4.

Data Sheets

This means that it can set the line “high”, “low”, or can effectively disconnect itself from the line. Sign up using Email and Password. And how the can act as a line driver? How does a Line Driver actually works? Anyways, if you look around a bit, you can find some slightly better datasheets that have more detailed internal diagrams. The circuits that are driving the inputs may not have the power to drive the impedance of a longer wire length.

I’m not sure what you mean by “how it works”. The enable function is common to all four drivers and offers the choice of an active-high or active-low enable G, G input. Eminem Language barrier here, I think. Sign up using Facebook. This is used in situations where any of several components can “drive” the bus though hopefully not more than one at a time. It can be used, eg, for a “bi-directional” bus between processor and memory or between processor and devices: It sounds like you’re looking for a equivalent circuit.


But how it works? The first is to provide a power gain. The second functionality is that it has a tristate output, which means that when the enable pin is not asserted the chip does not drive the output signal at all.

You can think of it as the logic gate equivalent of an amplifier. The line driver also serves to isolate the local circuits from electrostatic discharge from connections that might go off the board.

This chip does not perform any logical function; it is just giving the signal a strength boost. What you put in one end comes out the other. Low-power Schottky circuitry reduces power consumption without sacrificing speed.

That datasheet gives everything you need to actually use a 74HC Sign up or log in Sign up using Google. Datssheet Licks 3 8.

A line driver is simply a buffer. All I see in the inner structure is enables and input to outpuut wires.