Datasheet Review

Worked for 2 mins 33 sec

Independent check result: mostly consistent, but there are two assumptions worth flagging/confirming: footprint pad orientation/rotation, and whether the footprint coordinate system matches the datasheet “top view” numbering.

What matches the datasheet 1. Metadata

Given metadata appears consistent with the datasheet:

MPN: NX2016SA-52MHZ-EXS00A-CS06016
Manufacturer: NDK
Description: CRYSTAL 52MHZ 8PF SMD
Package/body: 2.0 × 1.6 × 0.45 mm
4-terminal SMD crystal

No obvious metadata mismatch.

2. Electrical terminal assignment

Datasheet says:

#1, #3: X’tal terminals
#2, #4: connected to metal cover, should connect to GND

Flux symbol:

Table

Flux terminal	Pin number	Function
`CRYSTAL_1`	1	X’tal
`GND_1`	2	Cover / GND
`CRYSTAL_2`	3	X’tal
`GND_2`	4	Cover / GND

This matches the datasheet electrically.

3. Pad center spacing

Footprint pads:

Table

Pad	Position
1	−0.675, +0.525
2	+0.675, +0.525
3	+0.675, −0.525
4	−0.675, −0.525

This gives center spacing:

X direction: 0.675 - (-0.675) = 1.35 mm
Y direction: 0.525 - (-0.525) = 1.05 mm

That matches the extracted datasheet land pattern center spacing: 1.35 mm × 1.05 mm.

So the pad placement pitch is likely correct.

Things to flag / challenge 1. Pad size and rotation may be ambiguous

You stated KiCad pads are:

size 0.750 × 0.850 rot90

This needs careful interpretation.

If the intended land size from the datasheet is 0.75 mm × 0.85 mm, then the footprint is correct only if the effective copper pad after rotation still matches the intended orientation.

In KiCad, a rectangular pad with size 0.750 x 0.850 and rotation 90° will usually render as an effective pad of approximately:

0.850 mm in X
0.750 mm in Y

rather than:

0.750 mm in X
0.850 mm in Y

Depending on how Flux imported or represents the rotation, this could mean the pad dimensions are swapped relative to the datasheet’s intended land pattern.

This is the main thing I would flag.

Recommended verification:

Confirm from the original NDK land pattern drawing which dimension corresponds to horizontal pad width and which corresponds to vertical pad height.
For a 2.0 × 1.6 mm package with center spacing 1.35 × 1.05 mm, a likely interpretation is:
- pad width in X: 0.75 mm
- pad height in Y: 0.85 mm

If so, then a KiCad pad declared 0.750 x 0.850 rot90 may be wrong unless the rotation is intentionally compensating for a local pad axis convention.

2. Pin/pad orientation depends on coordinate-system interpretation

The datasheet terminal land connections are given in top view. You listed symbol positions as:

#1 top-left
#2 top-right
#3 bottom-right
#4 bottom-left

The footprint positions are:

#1: −X, +Y
#2: +X, +Y
#3: +X, −Y
#4: −X, −Y

This matches the datasheet if +Y corresponds to “top” in the footprint view.

However, coordinate systems differ:

In many PCB/CAD contexts, visual “up” may correspond to positive Y.
In KiCad footprint files, coordinates are commonly interpreted in a screen-like or board coordinate context where Y direction can appear inverted depending on viewer/importer.
Flux’s rendered SVG uses a scale(1,-1) transform, which can make raw coordinate sign vs visual top/bottom easy to misread.

So I would not blindly conclude the orientation is correct just from the coordinate signs. I would visually confirm the pad numbering marker relative to pad #1 and compare against the datasheet top-view drawing.

That said, if the Flux/footprint display shows pad #1 at the physical top-left, pad #2 top-right, pad #3 bottom-right, and pad #4 bottom-left, then orientation is correct.

3. GND pins are correctly named, but users should understand they are not oscillator electrodes

The GND_1 and GND_2 terminal names are acceptable and useful, but these are not crystal electrodes. They are metal cover/shield connections.

This is not a mismatch, but I would perhaps document it as:

Pin 2: cover/shield, connect to GND
Pin 4: cover/shield, connect to GND

This avoids someone later thinking the device has two functional ground pins internally connected to the resonator circuit.

Verdict No clear datasheet mismatch found for:

MPN
manufacturer
body size
4-pad package
electrical pin assignment
pin numbering sequence, assuming the footprint top view is correct
pad center spacing

Flag for manual confirmation:

Pad size orientation: 0.750 × 0.850 rot90 may swap the intended land dimensions. Confirm whether final copper is 0.75 × 0.85 in the same orientation as the NDK land pattern.
Top-view orientation: confirm that pad #1 is truly top-left in the rendered footprint relative to the pin-1 marker and datasheet top view.
Shield pins: #2 and #4 should be marked as cover/shield GND, not crystal electrodes. Current naming is probably fine.

If the rendered footprint shows pad #1 top-left and the effective pad copper dimensions match the NDK land pattern, then I would consider the part project correct.

Thought for 20 sec

Created a project doc

Part Datasheet Review

View Document

Part: NX2016SA-52MHZ-EXS00A-CS06016 Manufacturer: NDK / Nihon Dempa Kogyo

flux

I created the detailed review report in Part Datasheet Review. I’m doing one final verification pass now.

Thought for 1 min 35 sec

flux

Reviewed the part metadata, existing Datasheet URL, symbol terminals, and footprint against the datasheet; no Datasheet URL update was needed because one was already set. Full details are in Part Datasheet Review.

Open items:

No blocking mismatch found.
Pin descriptions / pin types are currently missing or unspecified metadata.
Pad size values match numerically, but the 90° pad rotation should be visually confirmed before release.

Suggested next steps:

Update terminal pin descriptions for pins 1–4.
Confirm rendered copper pad orientation against the NDK land-pattern drawing.
Optionally verify the suffix-specific 8 pF order-code value from the official order-code table.

Fix metadata and verify

Update pin descriptions

Verify pad orientation

Check order code

Run final review

Files

Pins

Symbol

Layout

3D View

Part Datasheet Review

Part: NX2016SA-52MHZ-EXS00A-CS06016
Manufacturer: NDK / Nihon Dempa Kogyo
Review date: 2026-07-23
Datasheet source in project: c646a4210e81a086ecda8e8abca7138429229b300e6d5e051a9581dde39f4510.pdf

Current Flux part information reviewed

Table

Field	Current project value	Datasheet cross-check
Manufacturer Part Number	NX2016SA-52MHZ-EXS00A-CS06016	Matches datasheet extraction.
Manufacturer Name	NDK	Matches NDK / Nihon Dempa Kogyo.
Description	CRYSTAL 52MHZ 8PF SMD	Consistent with 52 MHz SMD crystal and 8 pF standard load capacitance noted by datasheet extraction.
Part Type	Crystals and Oscillators	Consistent.
Mount	Surface Mount	Consistent.
Package or Case Code	CRYSTAL-SMD	Generic package label; mechanically consistent with a 2.0 mm x 1.6 mm 4-terminal SMD crystal package.
Designator Prefix	Y	Appropriate for a crystal/resonator.
Pin / pad count	4	Matches datasheet terminal layout.
Datasheet URL	Already set	No update was required under the user instruction.

Key datasheet specifications extracted

Table

Spec	Datasheet value / note
Frequency	52 MHz
Nominal load capacitance	Datasheet standard value: 8 pF; optional range: 6 pF to 18 pF. Extraction did not explicitly decode the `CS06016` suffix beyond the part description/project value.
Frequency tolerance	±10 ppm at 25 ±3 °C
Operating temperature	Standard −40 °C to +85 °C; optional ranges shown include −10 °C to +75 °C and −40 °C to +85 °C variants.
ESR	For 40 MHz ≤ F ≤ 80 MHz: 50 Ω max; applies to 52 MHz.
Drive level	10 µW typ/recommended; 100 µW max.
Aging	±3 ppm/year max at +25 °C.
Body size	2.0 ±0.1 mm x 1.6 ±0.1 mm x 0.45 ±0.05 mm.
Terminal function	#1 and #3 are crystal terminals; #2 and #4 are connected to cover and should be connected to GND.

Symbol and pin check

Table

Datasheet pin	Datasheet function	Flux symbol terminal	Result
1	X'tal terminal	CRYSTAL_1, Pin Number 1	Matches.
2	Cover/shield, connect to GND	GND_1, Pin Number 2	Matches functionally.
3	X'tal terminal	CRYSTAL_2, Pin Number 3	Matches.
4	Cover/shield, connect to GND	GND_2, Pin Number 4	Matches functionally.

Symbol note: The terminals are electrically assigned correctly. The terminal components currently have Pin Type: Unspecified and no explicit Pin Description property populated. That is not a pinout mismatch, but it is metadata that could be improved by setting #1/#3 to crystal terminals and #2/#4 to cover/shield GND descriptions.

Footprint check

Table

Datasheet item	Flux footprint / KiCad asset	Result
Pad count	4 SMD pads	Matches.
Pin numbering top view	#1 top-left, #2 top-right, #3 bottom-right, #4 bottom-left in the footprint asset	Matches the extracted top-view terminal arrangement, assuming the rendered footprint orientation follows the KiCad top-layer view.
Pad center spacing	Datasheet land pattern includes 1.35 mm and 1.05 mm center spacing	Footprint pads at ±0.675 mm and ±0.525 mm give 1.35 mm x 1.05 mm spacing; matches.
Pad size	Datasheet land pattern includes 0.75 mm and 0.85 mm pad dimensions	Footprint uses rectangular pads declared 0.750 mm x 0.850 mm with 90° pad rotation. The numeric values match; the effective X/Y orientation should be visually confirmed because pad rotation can swap width/height depending on CAD interpretation.
Body/fab outline	Fab outline ±1.0 mm x ±0.8 mm	Matches 2.0 mm x 1.6 mm body.
Pin-1 marker	Silk marker near the #1 corner	Consistent with pin-1 identification.

Mismatches / flags

No blocking mismatch found for MPN, manufacturer, part type, pin count, symbol terminal assignment, or nominal footprint center spacing.
Pin descriptions are missing/unspecified in the terminal metadata. Suggested descriptions:
- Pin 1: Crystal terminal
- Pin 2: Cover/shield, connect to GND
- Pin 3: Crystal terminal
- Pin 4: Cover/shield, connect to GND
Pad dimension orientation should be visually confirmed if manufacturing-critical: the footprint declares 0.750 mm x 0.850 mm pads with 90° rotation. The datasheet numeric pad dimensions match, but the final rendered copper orientation should be checked against the NDK land-pattern drawing.
Load capacitance value: project description says 8 pF and datasheet extraction reports 8 pF as a standard value; the suffix-specific value was not independently decoded from the order-code table by OCR. Treat the description as consistent but verify against the official order-code table if this will be used for purchasing controls.

Current Flux part information reviewed
Key datasheet specifications extracted
Symbol and pin check
Footprint check
Mismatches / flags