Latitude-5491-SSD-Expander
About the Latitude-5491-SSD-Expander PCB
Latitude-5491-SSD-Expander is an open source PCB design by a-little-wifi, published on GitHub. It is a 4-layer board measuring 60 × 116 mm, with 22 components from 10 distinct parts.
Other key parts include the clockbuffer_RENESAS_9DBL411BGLFT. By type, the board carries 7 capacitors, 6 connectors, 6 resistors, 2 diodes and 1 IC.
From the project
PCIe bifurcating dual SSD adapter for the Dell Latitude 5491
This is also an experiment to figure out PCIe bifurcation in general. In this case I'm using a Renesas 9ZXL0651AKLF clock buffer with 6 outputs, but I'm only using the first 2 for this board.
Should in theory also work on the H-class CPU version of the Latitude 5480, but not the U-class 5480 and 5490, those only have 2 PCIe lanes for the SSD slot in the first place.
Main components on the Latitude-5491-SSD-Expander
Latitude-5491-SSD-Expander bill of materials (BOM)
22 components, 10 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | clockbuffer_RENESAS_9DBL411BGLFT | clockbuffer_RENESAS 9DBL411BGLFT | U2 |
| 1 | Bus_M.2_Socket_M | NGFF_M | J1 |
| 2 | M-key-full | m-key | J2, J3 |
| 1 | qwiic | JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J4 |
| 2 | refqwock | JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J5, J6 |
| 2 | LED | D_0603_1608Metric | D1, D2 |
| 5 | 100nF | C_0603_1608Metric | C1, C2, C3, C10, C12 |
| 2 | 10uF | C_0603_1608Metric | C11, C13 |
| 4 | 10kΩ | R_0603_1608Metric | R1, R2, R3, R4 |
| 2 | 5K1 | R_0603_1608Metric | R5, R6 |
Latitude-5491-SSD-Expander design files
The KiCad project lives in the a-little-wifi/Latitude-5491-SSD-Expander repository on GitHub; these links point at the commit this page was built from.
Latitude-5491-SSD-Expander: common questions
How big is the Latitude-5491-SSD-Expander PCB?
The Latitude-5491-SSD-Expander measures 60 × 116 mm, has 4 copper layers and is 0.8 mm thick.
How many components are on the Latitude-5491-SSD-Expander?
22 components, from 10 distinct parts. The full bill of materials is listed on this page.
Where can I download the Latitude-5491-SSD-Expander design files?
From the a-little-wifi/Latitude-5491-SSD-Expander repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Latitude-5491-SSD-Expander design in my own project?
The repository has no license, so all rights stay with a-little-wifi. Use it as a reference, and ask the author before reusing the design.