ZED X20P Review
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ZED-X20P Part Review
Date: 2026-07-21 Reviewed the Flux part project for u-blox ZED-X20P against the available datasheet and updated schematic terminal metadata ...
Completed the ZED-X20P part review and updated the schematic terminal metadata in-place: orientation, section, terminal order, pin type, and pin descriptions were assigned without changing any pin numbers or remapping pads. The detailed findings and specs are in ZED-X20P Part Review.
Open items:
- EP_1–EP_48 / pins 55–102 remain flagged as “Unclear / Check datasheet” because the available datasheet only documents pins 1–54.
- Verify the official u-blox Integration Manual before treating the 48 internal pads as confirmed land-pattern/mechanical/ground pads.
Suggested next steps:
- Provide or confirm access to the u-blox Integration Manual so I can verify the 102-pad footprint.
- Update the part to a specific ordering code such as ZED-X20P-00B if that’s the intended purchasable variant.
- If the integration manual confirms the EP pads, I can update their pin type/description and grounding guidance.
Verify pads and run checks
Verify EP pads
Run ERC/DRC
Update order code
Fix EP metadata
Refine this doc
Ask about this doc
ZED-X20P Part Review
Date: 2026-07-21
Scope
Reviewed the Flux part project for u-blox ZED-X20P against the available datasheet and updated schematic terminal metadata without changing, replacing, renumbering, or remapping any pins.
Source material
- Existing part datasheet property was already populated.
- Official u-blox datasheets found on the web:
- ZED-X20P-00B Data sheet, UBXDOC-963802114-12690, revision R05, 19-Nov-2025
- ZED-X20P-01B Data sheet, UBXDOC-304424225-21281, revision R01
- The current part data was checked primarily against the available ZED-X20P-00B R05 datasheet already attached to the part.
Part metadata reviewed
Table
| Field | Current / observed value | Datasheet cross-check |
|---|---|---|
| Manufacturer Part Number | ZED-X20P | Datasheet product name is ZED-X20P; orderable code shown as ZED-X20P-00B. Consider adding the orderable code if this part is specifically the -00B variant. |
| Manufacturer Name | u-blox | Matches datasheet. Library search facet also showed Manufacturer = Other, which appears to be a search-index metadata inconsistency. |
| Package or Case Code | LGA | Broadly correct; datasheet describes a compact surface-mounted 54-LGA module, nominal 22.0 mm × 17.0 mm × 2.4 mm. |
| Datasheet URL | Present | No update was required by the original instruction because a datasheet URL was already set. Official content.u-blox.com PDF was also found. |
| Published terminal count | 102 | Does not match the datasheet pin assignment table, which lists pins 1–54 only. See mismatch section. |
Key datasheet specifications
Table
| Specification | Value |
|---|---|
| Device | ZED-X20P-00B all-band high precision GNSS module |
| GNSS support | GPS, Galileo, BeiDou, QZSS |
| Signals / frequencies | GPS L1C/A 1575.420 MHz, L2C 1227.600 MHz, L5 1176.450 MHz; Galileo E1 1575.420 MHz, E5a 1176.450 MHz, E6 1278.750 MHz; BeiDou B1I 1561.098 MHz, B1C 1575.420 MHz, B2a 1176.450 MHz, B3I 1268.520 MHz; QZSS L1/L2/L5 |
| Tracking sensitivity | -167 dBm typical |
| Reacquisition sensitivity | -160 dBm typical |
| Cold / hot start sensitivity | -148 dBm / -158 dBm typical |
| VCC operating range | 2.7 V to 3.6 V, 3.0 V typical |
| V_BCKP operating range | 1.65 V to 3.6 V |
| Absolute max VCC / V_BCKP / V_USB | -0.5 V to 3.6 V |
| VCC current | 68 mA acquisition, 64 mA tracking typical for GPS+GAL+BDS example |
| Peak current | 80 mA acquisition typical for GPS+GAL+BDS example |
| VCC_RF output | VCC - 0.1 V typical, 50 mA operating output current; 300 mA absolute maximum output current |
| RF input impedance | 50 Ω |
| RF input absolute max | 10 dBm CW, 50 Ω source |
| Interfaces | UART, USB 2.0 FS, SPI, I2C |
| UART baud | 4800 to 8,000,000 bit/s |
| USB | USB 2.0 full-speed, 12 Mbit/s |
| SPI | Peripheral mode only; max clock frequency up to 12.80 MHz at 2 pF load |
| I2C | Peripheral mode; up to 1000 kbit/s; clock stretching up to 20 ms |
| Operating temperature | -40 °C to +85 °C |
| Mechanical size | 22.0 mm × 17.0 mm × 2.4 mm nominal; 22.2 mm × 17.2 mm × 2.6 mm max |
| Weight | 1.6 g |
Pin and symbol cross-check
Datasheet Table 12 lists only pins 1–54. The documented pins in the current symbol match the datasheet names and pin numbers for the checked set, including:
- 1 GND
- 2 RF_IN
- 3 GND
- 4 ANT_DETECT
- 5 ANT_OFF
- 6 ANT_SHORT_N
- 7 VCC_RF
- 8–11 Reserved
- 12 GND
- 13 Reserved
- 14 GND
- 15–18 Reserved
- 19 GEOFENCE_STAT
- 20 RTK_STAT
- 21–25 Reserved
- 26 RXD2
- 27 TXD2
- 28–31 Reserved
- 32 GND
- 33 VCC
- 34 VCC
- 35 Reserved
- 36 V_BCKP
- 37 GND
- 38 VDD_USB
- 39 USB_DM
- 40 USB_DP
- 41 GND
- 42 TXD / SPI_SDO
- 43 RXD / SPI_SDI
- 44 SDA / SPI_CS_N
- 45 SCL / SPI_CLK
- 46 TX_READY
- 47 D_SEL
- 48 GND
- 49 RESET_N
- 50 SAFEBOOT_N
- 51 EXTINT
- 52 Reserved
- 53 TIMEPULSE
- 54 Reserved
Metadata changes applied
The schematic terminal metadata was updated in-place only. No pin numbers, pad mapping, designators, or footprint pads were changed.
Section and ordering policy applied:
Table
| Section | Terminal orders | Split |
|---|---|---|
| Power | 1–5 | 3 left / 2 right |
| Analog / RF antenna | 6–9 | 2 left / 2 right |
| Control / reset / clock | 10–17 | 4 left / 4 right |
| Communication | 18–25 | 4 left / 4 right |
| Reserved documented pins | 26–46 | 10 left / 11 right |
| Unclear / extra EP pads | 47–94 | 24 left / 24 right |
| Ground | 95–102 | 4 left / 4 right |
Pin Type and Pin Description were also populated from the datasheet where clear. SAFEBOOT_N was annotated as “Safeboot, leave open” per the datasheet.
Footprint cross-check
Observed footprint data from the KiCad asset embedded in the part:
- 54 edge LGA pads, numbered 1–54
- 48 internal square pads, numbered 55–102 and represented in the symbol as EP_1 through EP_48
- Edge pads: 0.800 mm × 1.500 mm
- Internal pads: 1.100 mm × 1.100 mm
- Edge pad pitch appears 1.10 mm
- Internal pad grid pitch appears 2.10 mm
- Fab outline spans approximately 22.6 mm × 17.0 mm based on the imported footprint lines
- Courtyard spans approximately 24.6 mm × 19.0 mm
The datasheet mechanical table includes dimensions that appear consistent with some pad/spacing values, including 0.80 mm, 1.10 mm, 1.50 mm, and 2.10 mm nominal values. However, the datasheet text available in this project does not include a complete recommended PCB land pattern or confirm pins/pads 55–102.
Mismatches and flags
High priority: terminal count / extra EP pads
The current symbol and footprint expose 102 terminals/pads. The datasheet pin assignment defines a 54-LGA module and lists pins 1–54 only. The additional EP_1–EP_48 pads, mapped as pin numbers 55–102, are not confirmed in the datasheet text.
Treat EP_1–EP_48 as unverified footprint-only/mechanical/thermal/ground candidate pads until checked against the official u-blox Integration Manual referenced by the datasheet. They were therefore tagged with Pin Description = “Unclear / Check datasheet” and left as Pin Type = Unspecified.
High priority: land pattern not fully verified
The datasheet references an Integration Manual for soldering and implementation details. The current PDF did not expose a recommended land pattern, paste mask, solder mask, or explicit internal EP pad connection guidance in searchable text. Verify against the official integration manual before publishing this part as release-ready.
Medium priority: footprint body outline interpretation
The footprint fab outline appears to span about 22.6 mm in X, while the datasheet maximum body length is 22.2 mm. If that line is intended as the body outline, it may be oversized. If it represents a clearance, tab, or keepout feature, it may be acceptable. This should be checked against the mechanical drawing / integration manual.
Medium priority: MPN specificity
The current MPN property uses the product name ZED-X20P. The datasheet’s applicable ordering code is ZED-X20P-00B, with type number ZED-X20P-00B-00. If the project represents a purchasable -00B part, add or update an orderable-code property accordingly.
Low priority: library manufacturer facet
The part property says Manufacturer Name = u-blox, which matches the datasheet. Library search returned Manufacturer = Other in one facet result, suggesting a search-index metadata inconsistency rather than a schematic mismatch.
Conclusion
The documented pins 1–54 are consistent with the ZED-X20P-00B datasheet pin table and have now been categorized for a compact, balanced schematic symbol. The main unresolved issue is the 48 additional EP pads/pins 55–102: they may be valid land-pattern-only pads, but the available datasheet does not confirm them. Verify the official integration manual before treating those pads as confirmed electrical or mechanical requirements.
Scope
Source material
Part metadata reviewed
Key datasheet specifications
Pin and symbol cross-check
Metadata changes applied
Footprint cross-check
Mismatches and flags
High priority: terminal count / extra EP pads
High priority: land pattern not fully verified
Medium priority: footprint body outline interpretation
Medium priority: MPN specificity
Low priority: library manufacturer facet
Conclusion
