Part Review Audit

flux

I’ll inspect the part metadata and geometry, find the official datasheet if needed, update the Datasheet property, then compare symbol/footprint/pin details against the source.

flux

The official Amphenol datasheet URL is already present, so I’m not changing that property. I found likely review issues around missing pin metadata and footprint scale, and I’m writing the detailed findings to a project file now.
Created a project doc

Part Review - MDT420E01411

View Document
Date: 2026-07-15 Reviewed available part information for the Flux part project silicon-yard/mdt420e01411: MPN, manufacturer, package/style, ...

flux

Review complete. The Datasheet URL was already set to the official Amphenol drawing, so I left it unchanged and created the detailed report here: Part Review - MDT420E01411.
Key flags: the terminal count/numbering matches the M.2 Key E pattern, but all pin descriptions/types are missing, and the footprint readback appears 1000× too small versus the datasheet dimensions. I also filed an internal part-quality report for the footprint scale issue.
Fix metadata and footprint
Correct footprint scale
Add pin metadata
Mark high-speed pairs
Verify after fixes
16
Pin Number
16
50
Pin Number
50
20
Pin Number
20
36
Pin Number
36
51
Pin Number
51
32
Pin Number
32
55
Pin Number
55
39
Pin Number
39
44
Pin Number
44
21
Pin Number
21
19
Pin Number
19
42
Pin Number
42
56
Pin Number
56
75
Pin Number
75
70
Pin Number
70
2
Pin Number
2
62
Pin Number
62
46
Pin Number
46
10
Pin Number
10
9
Pin Number
9
23
Pin Number
23
14
Pin Number
14
69
Pin Number
69
43
Pin Number
43
5
Pin Number
5
67
Pin Number
67
18
Pin Number
18
73
Pin Number
73
63
Pin Number
63
13
Pin Number
13
66
Pin Number
66
59
Pin Number
59
60
Pin Number
60
6
Pin Number
6
64
Pin Number
64
7
Pin Number
7
MP2
Pin Number
77
47
Pin Number
47
15
Pin Number
15
68
Pin Number
68
74
Pin Number
74
57
Pin Number
57
MP1
Pin Number
76
4
Pin Number
4
12
Pin Number
12
71
Pin Number
71
48
Pin Number
48
53
Pin Number
53
8
Pin Number
8
54
Pin Number
54
33
Pin Number
33
41
Pin Number
41
11
Pin Number
11
40
Pin Number
40
61
Pin Number
61
49
Pin Number
49
37
Pin Number
37
38
Pin Number
38
22
Pin Number
22
72
Pin Number
72
17
Pin Number
17
35
Pin Number
35
1
Pin Number
1
34
Pin Number
34
58
Pin Number
58
45
Pin Number
45
52
Pin Number
52
65
Pin Number
65
3
Pin Number
3

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Part Review - MDT420E01411
Date: 2026-07-15
Scope
Reviewed available part information for the Flux part project silicon-yard/mdt420e01411: MPN, manufacturer, package/style, pin count, description, project properties, schematic terminals, and PCB footprint geometry. Cross-check source is the official Amphenol Communications Solutions product drawing currently stored in the part's Datasheet URL property:
  • https://cdn.amphenol-cs.com/media/wysiwyg/files/drawing/cmdt420x0x411.pdf
The Amphenol product page and official datasheet family documentation also identify the device as MDT420E01411, PCIe Gen4 M.2 1A, Key E, 0.50 mm pitch, 4.2 mm height, 30 µin Au.
Current Part Metadata Found

Table

FieldCurrent value / observed state
Manufacturer NameAmphenol Communications Solutions
Manufacturer Part NumberMDT420E01411
Part TypeConnectors
Designator PrefixJ
DescriptionPCIe Gen4 M.2 1A Connectors, Storage and Server Connector, Pitch 0.5mm, Height 4.2mm, Key E, 30uin Gold Plating
Datasheet URLPresent: official Amphenol drawing cmdt420x0x411.pdf
Published as partYes
Part UID59d41a35-7485-460b-8433-b9664cd026da
Schematic components/terminals69 terminal symbols: pins 1-23, 32-75, plus MP1/MP2
PCB layout nodes inspected67 numbered contact pads, 2 hold-down pads MP1/MP2, plus 2 circular mechanical holes/pads 78/79
Footprint assetMDT420E01411.kicad_mod
Datasheet Key Specs

Table

SpecDatasheet / drawing value
ManufacturerAmphenol Communications Solutions / Amphenol CS
MPNMDT420E01411
Family / drawingMDT420X0X411, drawing C MDT420X0X411 Rev. A
Connector typePCIe Gen4 M.2 1A card-edge connector, storage/server connector
Orientation / terminationRight-angle, surface-mount
KeyE
Pitch0.50 mm
Height4.2 mm
Numbered electrical contacts67 contacts
Present pin numbers1-23 and 32-75
Absent pin numbers24-31, Key E notch
Current rating1 A per power pin
Data rate16 Gb/s
PCB thickness reference0.80 mm
Operating temperature-40°C to +85°C
Contact plating for option 10.76 µm / 30 µin gold
Contact pad size0.30 ±0.03 mm x 1.55 ±0.03 mm
Contact pad rows34 pads on odd row, 33 pads on even row
Row center spacing3.00 mm
Hold-down pads2 pads, 1.20 ±0.03 mm x 2.75 ±0.03 mm
Mechanical locating holes/featuresØ1.10 ±0.05 mm and Ø1.60 ±0.05 mm, 18.00 mm center-to-center
Total copper lands69 = 67 contact lands + 2 hold-down lands
Pin / Terminal Cross-Check
Pin count and numbering
The schematic terminal set matches the M.2 Key E contact population pattern:
  • Present numbered contacts: 1-23 and 32-75.
  • Absent/not populated numbers: 24-31 for the Key E mechanical notch.
  • Additional mechanical/hold-down terminals: MP1 and MP2, mapped to internal pin numbers 76 and 77.
This is consistent with the datasheet count of 67 electrical contacts plus two hold-down lands.
Pin descriptions and pin types
Mismatch: all schematic terminal components currently have Pin Type: Unspecified, and no terminal-level functional Pin Description values were found. The datasheet/application pinout expects descriptive signal names, power/ground classification, and high-speed signal identification. Examples:

Table

PinExpected description
1GND
23.3V
3USB_D+
43.3V
5USB_D-
6LED_1# / open-drain input
7GND
8PCM_CLK / I2S_SCK
9SDIO_CLK / SYSCLK
10PCM_SYNC / I2S_WS
11SDIO_CMD
12PCM_IN / I2S_SD_IN
13SDIO_DATA0
14PCM_OUT / I2S_SD_OUT
15SDIO_DATA1
16LED_2# / open-drain input
17SDIO_DATA2
18GND
19SDIO_DATA3
20UART_WAKE#
21SDIO_WAKE#
22UART_RXD
23SDIO_RESET# / TX_BLANKING
32UART_TXD
33GND
34UART_CTS
35PETp0
36UART_RTS
37PETn0
38Vendor defined
39GND
40Vendor defined
41PERp0
42Vendor defined
43PERn0
44COEX3
45GND
46COEX_RXD
47REFCLKp0
48COEX_TXD
49REFCLKn0
50SUSCLK 32 kHz
51GND
52PERST0#
53CLKREQ0#
54W_DISABLE2#
55PEWAKE0#
56W_DISABLE1#
57GND
58I2C_DATA
59RESERVED / PETp1
60I2C_CLK
61RESERVED / PETn1
62ALERT#
63GND
64RESERVED
65RESERVED / PERp1
66UIM_SWP / PERST1#
67RESERVED / PERn1
68UIM_POWER_SNK / CLKREQ1#
69GND
70UIM_POWER_SRC / GPIO_1 / PEWAKE1#
71RESERVED / REFCLKp1
723.3V
73RESERVED / REFCLKn1
743.3V
75GND
Recommendation: add Pin Description, Pin Type, and functional grouping metadata for all terminals. High-speed differential terminals should be explicitly identifiable: USB_D+/USB_D-, PETp0/PETn0, PERp0/PERn0, REFCLKp0/REFCLKn0, and optional lane/reserved pairs where applicable.
Footprint Cross-Check
Geometry count and numbering
The footprint contains the expected functional groups:
  • 67 rectangular contact pads for pins 1-23 and 32-75.
  • 2 rectangular hold-down pads: MP1 and MP2.
  • 2 circular mechanical/locating hole features: designators 78 and 79.
Pad numbering pattern appears consistent with the drawing:
  • Odd row: pin 1 at the left through pin 75 at the right.
  • Even row: pin 2 at the left through pin 74 at the right.
  • Pins 24-31 absent for Key E.
Footprint scale mismatch
Major mismatch: the layout readback reports dimensions that are 1000x smaller than the datasheet values while claiming unit: mm.

Table

FeatureDatasheet expectedLayout readback
Contact pad width0.30 mm0.0003 mm
Contact pad length1.55 mm0.00155 mm
MP hold-down pad1.20 mm x 2.75 mm0.0012 mm x 0.00275 mm
Ø1.10 locating hole1.10 mm0.0011 mm
Ø1.60 locating hole1.60 mm0.0016 mm
Pin 1 x-position magnitudeabout 9.25 mm0.00925 mm
Row y-position magnitudeabout 3.775 mm in centered coordinates0.003775 mm
This strongly indicates an import/unit scaling issue in the PCB footprint. If the readback is authoritative, the footprint is not manufacturable as-is: contact pads and holes would be microscopic.
Mechanical pad notes
The circular locating features 78 and 79 are represented as pads in the readback. The datasheet describes these as non-signal mechanical holes/features, not electrical connector terminals. They should be modeled with appropriate drill/hole semantics if the platform supports it, or at minimum clearly marked as mechanical/non-BOM/non-electrical features.
Review Result Summary
Matches
  • Manufacturer, MPN, description, pitch, height, key, plating, and part family match the Amphenol source.
  • Datasheet URL is already populated with the official Amphenol drawing URL.
  • Schematic pin population matches M.2 Key E: 67 contacts, pins 24-31 absent.
  • Footprint pad count and numbering pattern appear logically consistent with the drawing.
  • Hold-down pads MP1/MP2 exist and match the expected 2 additional copper lands by naming/intent.
Mismatches / Risks
  1. Major footprint scale mismatch: pad and hole dimensions read back 1000x smaller than datasheet values.
  2. Missing terminal descriptions: schematic terminals do not carry datasheet signal names/functions.
  3. Pin types are unspecified: power, ground, high-speed differential, I/O, input/output, reserved, and mechanical pins are not classified.
  4. Mechanical holes represented as pads: locating holes 78/79 appear as circular pads; verify that these are modeled as mechanical holes/drills, not electrical lands.
  5. No schematic nets: the part project has no nets, which is normal for a raw connector part but means signal roles must come from terminal metadata.
  1. Correct the footprint unit scale so all coordinates and sizes are in true millimeters: contact pads 0.30 mm x 1.55 mm, MP pads 1.20 mm x 2.75 mm, locating features Ø1.10 mm and Ø1.60 mm.
  2. Add terminal Pin Description values for all contacts from the M.2 Socket 1 Key E pinout.
  3. Assign terminal Pin Type values: power for 3.3V, ground for GND, bidirectional/input/output where specified, passive/mechanical for MP pads and locating features.
  4. Add functional groups: Power, Ground, USB 2.0, PCIe TX/RX, REFCLK, SDIO, UART, I2S/PCM, I2C/alert, control/coexistence, reserved/vendor-defined, mechanical.
  5. Mark high-speed differential pairs and controlled-impedance roles on USB, PCIe, and REFCLK terminals if this part will be used for routing-aware designs.
  6. Verify the footprint visually and by readback after rescaling; the current scale issue should be treated as a blocking manufacturability issue until resolved.

  • Scope

  • Current Part Metadata Found

  • Datasheet Key Specs

  • Pin / Terminal Cross-Check

  • Pin count and numbering

  • Pin descriptions and pin types

  • Footprint Cross-Check

  • Geometry count and numbering

  • Footprint scale mismatch

  • Mechanical pad notes

  • Review Result Summary

  • Matches

  • Mismatches / Risks

  • Recommended Fixes

Documents

Assets

MDT420E01411-thumb.png

MDT420E01411-thumb.png

MDT420E01411-thumbThumbnail

MDT420E01411

MDT420E01411 Symbol.svgDefault
MDT420E01411

MDT420E01411

MDT420E01411.stp3D Model

MDT420E01411

MDT420E01411.kicad_modFootprint

MDT420E01411

MDT420E01411 thumbnail
M.2 PCIe Gen4 Edge Card Connector – 67-position M.2 Key E edge card connector for PCI Express® Gen4 module interconnection. Features a 0.50 mm pitch, right-angle surface-mount solder termination, 67 contacts, 16 Gb/s data rate, and 1 A current rating. Supports 0.80 mm PCB/module thickness and includes board guides, 30 µin (0.76 µm) gold-plated copper alloy contacts, and a liquid crystal polymer (LCP) housing. Specified for an operating temperature range of −40°C to +85°C.
#Amphenol #AmphenolICC #MDT420E01411 #M2Connector #PCIeGen4 #KeyE #EdgeCardConnector #67Position #0_5mmPitch #SurfaceMount #HighSpeedConnector #EmbeddedSystems

Properties

MDT420E01411

Amphenol Communications Solutions

Connectors

cdn.amphenol-cs.com/media/wysiwyg/files/drawing/cmdt420x0x411.pdf

J

parametric-v1

Pricing & Availability

DPN

Stock

Qty 1

3

0–730

$1.912–$3.5335

1

2.5K

$3.54

1

730

$1.912

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