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page_id: wsd-io-pads-versions-2f331de5
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title: "Thread: io pads versions"
slug: wsd-io-pads-versions-2f331de5
route: /evidence/i-information/questions/threads/io-pads-versions
section: reference
access: public
summary: 2 Discord messages from ℹ️ - Information/⁉️-questions/threads/io-pads-versions.md.
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tags: [discord, wafer-space, archive]
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---

# Thread: io pads versions

Category: **ℹ️ - Information**
Parent channel: **#⁉️-questions**
Thread ID: `1445297697773977671`

Messages: **2**

## message-1445297697773977671

**2025-12-02T06:17:03.482+00:00 — Evansika (@xintingjiang_36756)**

- Message ID: `1445297697773977671`
- Author ID: `1413605821430104114`
- Nickname: Evansika
- User name: xintingjiang_36756
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1445297697773977671/1445297697773977671
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/%E2%81%89%EF%B8%8F-questions/io-pads-versions/2025-12/2025-12.json
- Archive source: https://discord.wafer.space/wafer-space/Information/questions/io-pads-versions/2025-12/2025-12.json

**Content**

```text
Hi all,
I noticed that there are 3 types of gds for the pad standard cells but only one type has .cdl file. Was curious which version should we use?
```

**Attachments**

- Resolved media URL: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/%E2%81%89%EF%B8%8F-questions/io-pads-versions/2025-12/2025-12_media/image-1A508.png
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---

## message-1445315404120457349

**2025-12-02T07:27:25.004+00:00 — Leo Moser (mole99) (@mole99)**

- Message ID: `1445315404120457349`
- Author ID: `323371864074485771`
- Nickname: Leo Moser (mole99)
- User name: mole99
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1445297697773977671/1445315404120457349
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/%E2%81%89%EF%B8%8F-questions/io-pads-versions/2025-12/2025-12.json
- Archive source: https://discord.wafer.space/wafer-space/Information/questions/io-pads-versions/2025-12/2025-12.json

**Content**

```text
`fd` are the foundry provided cells. `ef` is from Efabless and modifies the digital I/O cell to add an analog pin. `ws` stands for wafer.space and modifies the power/ground pads to add another pin access layer, since that is necessary for OpenROAD to connect to the core ring.
```

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