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w2hx
3 Posts |
 Posted - 04/26/2020 : 10:34:37
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Hello there. I am trying to understand the device location picture. Below is what I get for a dallas one wire chip. What I can't figure out is:
1. what is the meaning of the red #18 pin? Is that supposed to be pin 1 of the chip?
2. There appears to be a gray dot on pin 20. Is this intended to mean pin 1 of the chip?
This chip, DS28EC20, comes in both a TO-92 form factor (like a transistor, and TSOC form factor. I am assuming this depiction on the device location image is attempting to show the TO-92? To the right, there appears to be something attempting to show the flat side and the convex side of the TO-92, but I can't figure out what it is trying to show.
Any help appreciated. thanks
W2HX
Image Insert:
23884 bytes |
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| Reply #1
anniel
2572 Posts |
Posted - 04/26/2020 : 10:50:06
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quote:
Originally posted by w2hx
Hello there. I am trying to understand the device location picture. Below is what I get for a dallas one wire chip. What I can't figure out is:
1. what is the meaning of the red #18 pin? Is that supposed to be pin 1 of the chip?
2. There appears to be a gray dot on pin 20. Is this intended to mean pin 1 of the chip?
This chip, DS28EC20, comes in both a TO-92 form factor (like a transistor, and TSOC form factor. I am assuming this depiction on the device location image is attempting to show the TO-92? To the right, there appears to be something attempting to show the flat side and the convex side of the TO-92, but I can't figure out what it is trying to show.
Any help appreciated. thanks
W2HX
Image Insert:
23884 bytes
That looks like a TO-92 and pin 1 is 20 on the ZIF. |
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| Reply #2
w2hx
3 Posts |
Posted - 04/26/2020 : 11:01:09
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Thank you, anniel. Can you tell me what the red 18 signifies? I see this for other chips as well? Thanks again
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| Reply #3
anniel
2572 Posts |
Posted - 04/26/2020 : 11:50:31
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quote:
Originally posted by w2hx
Thank you, anniel. Can you tell me what the red 18 signifies? I see this for other chips as well? Thanks again
It indicates where the device starts on the ZIF as it is rarely at pin 1. |
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| Reply #4
w2hx
3 Posts |
Posted - 04/26/2020 : 12:19:16
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| aaah. ok thank you! |
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| Reply #5
anniel
2572 Posts |
Posted - 04/26/2020 : 13:35:46
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quote:
Originally posted by w2hx
aaah. ok thank you!
You're welcome. |
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Understanding Device Location
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