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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It can be used, eg, for a “bi-directional” bus between processor and memory or between processor and devices: I mean, it gives us the temperatures, but not how the actual component works 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.

Jeff Bell 1 4.

Email Required, but never shown. It’s as if the chip were disconnected from the wire. By using our site, you acknowledge that you 74h2c44 read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Sign up using Email and Password. All I see in the inner structure is enables and input to outpuut wires.

Link to Datasneet datasheet: The enable function is common to all four drivers and offers the choice of an active-high or active-low enable G, G input. Tristate mode also saves power by not driving the line when there is nothing to send. Eminem Language barrier here, I think.

It sounds like you’re looking for a equivalent circuit. That datasheet gives everything you need to actually use a 74HC Post as a guest Name.

What you put in one end comes out the other. Home Questions Tags Users Unanswered. So, how do thy actually works?


The datasheet also states: 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.

This means that it can set the line “high”, “low”, or can effectively disconnect itself from the line. The first is to provide a power gain. Eminem – What makes you think the input is connected directly to the output? I’m not sure what you mean by “how it works”. So I’ve searched for days for information about the 74HC line driver. A line driver is simply a buffer. Post Your Answer Discard 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.

I mean, how the can increase the current with just sending the input to the output? This is used in situations where any of several components datasneet “drive” the bus though hopefully not more than one at a time.

In case it’s the apparent lack of power to the chip that’s confusing you: What do you dztasheet a buffer is?

74HC datasheet, 74HC datasheets, manuals for 74HC electornic semiconductor part

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, there is very little information about Line Drivers in general. There are two principal functions of this line driver.

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. And how the can act as a line driver? Sign up using Facebook. As always, the Datasheet provides raw and not very good information about the actual component: But how it works?


Anyways, if you look around a bit, you can find some slightly better datasheets that have more detailed internal diagrams. How does a line driver actually work? The line driver also serves to isolate the local circuits from electrostatic discharge from connections that might go off the board. 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.

How does a Line Driver actually works? Low-power Schottky circuitry reduces power consumption without sacrificing speed. It should be noted that the device identified above is a “tri-state” driver.

This chip does not perform any logical function; it is just giving the signal a strength boost. 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. You can think of it as the logic gate equivalent of an amplifier.

Or the Altera can provide a good current flow to the servo without damaging it’s abilities? The circuits that are driving the inputs may not have the power to drive the impedance of a longer wire length.

Data Sheets

Eminem 1 3 8. Sign up or log in Sign up using Google. That power is used by each buffer element to increase the load it can drive. Hot Licks 3 8.