Texas Instruments 74LS05 Buffers & Line Drivers are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Texas Instruments . As you pointed out, the 74LS05 has “open-collector” outputs and the 74LS04 does not. There are two general types of outputs in digital. SN54/74LS HEX INVERTER. LOW POWER SCHOTTKY. J SUFFIX. CERAMIC . CASE N SUFFIX. PLASTIC. CASE 1. 1. ORDERING.
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Sign up using Email and Password. As you pointed out, the 74LS05 has “open-collector” outputs and the 74LS04 does not.
They drive the output to ground to reflect a logic 0 this is called “sinking”. Post as a guest Name.
The line into the microcontroller going to a logic 0 will be 74ld05 as an interrupt — since this is caused by the line going from high to low, this is called an “active low” signal. One example is several devices with interrupt outputs feeding into a single interrupt pin on a microcontroller.
Excellent explanation for how OC works. Sign up using Facebook. Since the pull-up resistor is a fairly high value, this will not 74os05 very much current, about 1 mA for a 4. Sign up or log in Sign up using Google. But 74sl05 way you don’t need to actually include the physical gate. You can use them to turn a 12V light on and off by connecting the light between 12V and the output. It looks like the 74LS05 has “open collector outputs” not sure what that is and the 04 does not.
74LS05 – Hex Inverter Open Coll
Plus, it appears the 74sl05 is more expensive?
KevinKeane Good point – I’ll add that to my answer. The 74LS05 is probably more expensive because there is much less demand for the chip. Regular push-pull outputs are used when only one output is driving one or more inputs, which is the case most of the time. How, if no output is driving it high? Well it allows the output of several chips to be tied together, and they won’t be interfering with each other all trying to drive the line high.
74LS05 Hex Inverter (Open Collector)
Somewhere there will be a “pull-up resistor” common values are 4. One other way to look at it: Push-pull outputs, which are in the 74LS04 drive the output high to the level of the power input of the chip, typically 5v or 3.
Then when an interrupt occurs, the chip causing the interrupt will pull the line to ground.
What good is that?