74LS245N DATASHEET EPUB DOWNLOAD

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You can connect the databus directly 74ls245n datasheet some memory, but once you start adding a lot of circuitry, it would load down fatasheet CPU’s data bus too 74ls245n datasheet the CPU datalines couldn’t 74ls245n datasheet enough current.

This is data in with a chip enable. Simply connecting the two busses may be too heavy a load for the bus drivers. Imagine latches with information ready. So call the data bus bus D. Enable bus A to transmit to bus D, and bus B to receive from bus D. For what I can extract from the datasheet, it’s a device that interconnects two buses and, depending on the DIR-pin, either transmits data from bus A to B or B to A.

WIthout the bus transceiver, they would fight over the bus. I got stuck on 74LS, an octal bus 74ls245n datasheet. Create free account Forgot password? Jasen Reply Start a New Thread. Chronological Newest First So, I’m sitting and reading the 74LS-databook just 74ls245n datasheet the sake of getting a wider view of what’s available out there, which in turn daatsheet learns me more about electronics.

On May 8, 3: Reverse the direction when bus A has data to place on bus D. Enable the to permit bus A 74ls245n datasheet receive data from bus D, while disabling the transceivers on the other busses.

| Question about 74LS bus transceiver

When there exist busses Datasheft, D and so forth. In the third, high-impedance state, the driver is effectively disconnected, allowing other drivers to use the bus. On Tue, 08 May Shut off bus B and turn on bus C to receive and 74ls245n datasheet a similar note, I have used the 74ls245n datasheet, which is similar.

I use the to connect 5. And given that many of the answers here have addressed 74ls245n datasheet tri-state nature of the device, you can also turn off the transceiver, so the CPU databus is isolated 74ls245j the rest of the circuitry.

Posted by Stephen J. Another example would be data routing. Likewise for B, C etc.

74ls245 Datasheet

Byte and Swith Jason Sachs. Forgive my ignorance, but 74ls245n datasheet question is; when do you need a device like this?

74ls245n datasheet I got it perfectly. Circa Tue, 08 May Not so useful in datazheet, but if you had two CPUs using the same rest of the circuitry, disabling the databus transceiver connected to one as well as the buffers on the other CPU’s lines would allow the other CPU to take over. Bus A needs to read data from bus D. You could use two sets of one-way buffers, to buffer signals out of the CPU and to buffer signals going into the CPU, but that would be bulky.

This is data out used with a chip enable. There is enough use for this that it was worth creating 74ls245n datasheet single device for it. 74ls245n datasheet

If you just connected the busses, you could have only one data source. Why not simply connect bus A to B? Reply Start a New Thread. Data now 74ls245n datasheet connected to pass from A to B.

It’s a transceiver because the databus is going both ways. Sign in Sign in Remember me Forgot username or password? Michael Reply Start a New Thread. So you add a buffer so there won’t 74ls245n datasheet much load on the 74ls245n datasheet, but there will be enough signal on the databus for all the peripheral circuitry. 74ls245n datasheet decoder chips that drive 7 segment displays. The is a bi directional, octal bus transceiver, like the datasheey, but it allows for different voltage potentials on the A and B side.

Say you have a CPU.