Suggestions how to generate a 4 terminal MLCC
Printed From: PCB Libraries Forum
Category: PCB Footprint Expert
Forum Name: Questions & Answers
Forum Description: issues and technical support
URL: https://www.PCBLibraries.com/forum/forum_posts.asp?TID=3342
Printed Date: 06 Oct 2024 at 10:24am
Topic: Suggestions how to generate a 4 terminal MLCC
Posted By: Iain-Trakka
Subject: Suggestions how to generate a 4 terminal MLCC
Date Posted: 18 Dec 2023 at 5:01am
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Hello, I'm curious to understand how one would generate a 4 terminal MLCC? Reference Part: EMCT101W103M1GV001E I do not see any 'good' starting component types... Any insight would be greatly appreciated, Thank you in advance, Iain
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Replies:
Posted By: Tom H
Date Posted: 18 Dec 2023 at 9:46am
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You need to use the mfr. recommended pattern and create the Footprint in FP Designer. There is no information on solder joint goals for this non-standard Chip package with 3 pins. The mfr. needs to provide the pad stack information. ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: Iain-Trakka
Date Posted: 06 Jan 2024 at 1:39pm
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Tom, Thank you for your response and suggestion - I've reached out to the mfg. for their input... I'll post results here, if possible. Regards, Iain
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Posted By: Iain-Trakka
Date Posted: 12 Jan 2024 at 5:59pm
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Tom, The mfg. came back with land pattern recommendations for the copper layer only, solder/paste mask were not provided. is this something that I could request your assistance with via POD request? (or request the part entirely...) Look forward to your comments, Iain
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Posted By: Tom H
Date Posted: 12 Jan 2024 at 6:08pm
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Paste Mask is normally 1:1 scale of the pad size. A PCB Library can have Solder Mask 2 ways:
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Posted By: Iain-Trakka
Date Posted: 13 Jan 2024 at 4:12am
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Tom, Thank you for responding - I believe I missed sharing some context on what was puzzling me... The part has 4-leads, yet the provided land pattern is three terminals (See Figure 3. Page 10, link below): Reference: https://productfinder.pulseelectronics.com/api/open/part-attachments/datasheet/CX0805MRX7R9BB153" rel="nofollow - https://productfinder.pulseelectronics.com/api/open/part-attachments/datasheet/CX0805MRX7R9BB153 (Note, yes this is a different part that I originally stated, yet FP is comparable and it is published data) Knowing that we'd end up connecting copper between the center two pins (as shown above), would we also extend the mask/paste completely across this center pin? Does it make sense to have exposed copper/paste directly under the center of the ceramic body? Other land patterns that I've seen, all had 4 distinct solder/paste areas (regardless of the copper shapes below)... Look forward to your comments. Regards, Iain
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Posted By: Tom H
Date Posted: 13 Jan 2024 at 10:05am
You have Pin 1 (left), Pin 2 (right) and Pin 3 (Center). ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: Iain-Trakka
Date Posted: 13 Jan 2024 at 11:31am
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Tom, Looking at figure 2, there are 4 distinct pins:  |
Posted By: Tom H
Date Posted: 13 Jan 2024 at 11:38am
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Makes no difference. Use the mfr. recommended pattern. ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: Iain-Trakka
Date Posted: 13 Jan 2024 at 12:11pm
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Okay Tom, Thank you for the insight. Regards, Iain
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