Part Datasheet Review and Validation

flux

The part already has a Datasheet URL set, so I’ll use that official product page as the reference and won’t overwrite it.

flux

Review complete. The Datasheet URL was already set to the official FlyTo product page, so I did not overwrite it; I documented the full metadata/spec/pinout/footprint cross-check in MM238RW Part Review.
Open items:
  • The current symbol mostly matches the official English page pin table, but conflicts heavily with a newer/search-discovered MM238RW PDF/Chinese listing pinout.
  • Pin 7 label 6.5M, SPI pin descriptions, pin types, and the supply-pin direction need cleanup once the intended module revision is confirmed.
  • Footprint outline matches 28 × 23 mm, but a newer source lists 28.4 × 23 mm.
Suggested next steps:
  1. Confirm which MM238RW revision/source should be authoritative.
  2. Update symbol pin descriptions and pin types.
  3. If using the newer PDF pinout, remap the symbol/footprint pins before release.
Use English source
Use newer PDF
Compare revisions
Fix current issues
Run part review
GND
Pin Number
9
6.5M/Audio_AL
Pin Number
7
CH2
Pin Number
2
GND
Pin Number
10
CH3
Pin Number
3
CH1
Pin Number
1
GND
Pin Number
4
RSSI
Pin Number
6
GND
Pin Number
13
GND
Pin Number
14
ANT
Pin Number
11
+3.3~5V
Pin Number
5
GND
Pin Number
12
Video
Pin Number
8

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MM238RW Part Review
Scope
Reviewed available part information for the published Flux part MM238RW and cross-checked the schematic terminals, footprint, and part properties against available official/near-official documentation.
Existing Flux Part Metadata

Table

FieldCurrent value
Project / partMM238RW
Part UIDc5673044-0462-4b49-b4bc-ebf660cb9b0c
Part TypeModule
Manufacturer Part NumberMM238RW
Manufacturer NameFlymod Technology Co., Ltd.
Designator PrefixU
Datasheet URLhttps://www.flytofpv.com/product/MM238RW-Wireless-FPV-Video-Transmission-Open-Source-Receiver-with-SPI-High-Sensitivity-e.html
Symbol Styleparametric-v1
Published as partyes
Schematic terminals14
Footprint pads14
The Datasheet URL was already populated, so it was not changed.
Source Documents Checked
  1. Official FlyTo English product page: current Datasheet URL.
    • Product-page images list MM238R-MCU / MM238RW-MCU style data.
    • Specs shown include 3.3–5.0 V supply, 220 mA max current, 4900–5945 MHz receive range, 28 × 23 × 3.0 mm dimensions, and a 14-pin assignment.
  2. Search-discovered MM238RW PDF hosted on AliExpress media.
    • Identifies MM238RW FPV Receiver Model, 4.9G / 5.8G / 6.0G SPI Mode.
    • Lists a different MM238RW V1.0-style pinout and specs: 3.6–5.0 V, 190 mA max, 4867–6060 MHz, 28.4 × 23 × 3.3 mm.
  3. Official FlyTo Chinese product page found during web search.
    • Appears to align with the PDF/newer MM238RW V1.0-style pinout rather than the English page’s MM238RW-MCU-style table.
Key Specifications Found

Table

ParameterOfficial English pageSearch-discovered MM238RW PDF / Chinese listing
Supply voltage+3.3 to +5.0 V+3.6 to +5.0 V
Current consumption220 mA max190 mA max
Receive frequency4900–5945 MHz4867–6060 MHz
Sensitivity-90 dBm-90 dBm
DemodulationFM/PLLFM/PLL
IF480 MHz480 MHz
Antenna impedance50 Ω typ.50 Ω typ.
Video output75 Ω, 1 ± 0.2 Vp-p75 Ω, 1 ± 0.2 Vp-p
RSSI output0.7–2.2 V over -30 to -90 dBmlisted as RSSI output
Operating temperature-10 to +65 °C-10 to +65 °C
Dimensions28 × 23 × 3.0 mm28.4 × 23 × 3.3 mm
Pin count1414
Schematic Symbol Cross-Check
Current Flux terminals

Table

Flux pinFlux terminal nameNotes
1CH1Left side, Terminal Order 1
2CH2Left side, Terminal Order 2
3CH3Left side, Terminal Order 3
4GNDGround terminal
5+3.3~5VSupply terminal
6RSSIRSSI terminal
76.5MAudio/subcarrier output naming
8VideoVideo terminal
9GNDGround terminal
10GNDGround terminal
11ANTAntenna terminal
12GNDGround terminal
13GNDGround terminal
14GNDGround terminal
Match against official English product page pin table

Table

PinEnglish-page functionFlux symbolStatus
1CH1: DATACH1Partial: lacks DATA description
2CH2: LECH2Partial: lacks LE description
3CH3: CLKCH3Partial: lacks CLK description
4GNDGNDMatch
5+3.3~+5V Out / supply rail in circuit context+3.3~5VPartial: direction ambiguous
6RSSI: RF signal-strength indicationRSSIMatch, but description missing
7Audio AL Out6.5MMismatch/ambiguous: Flux label is carrier-like, not explicit audio output
8Video OutVideoMatch, but description missing
9GNDGNDMatch
10GNDGNDMatch
11ANT INANTMatch, but description missing
12GNDGNDMatch
13GNDGNDMatch
14GNDGNDMatch
Match against search-discovered MM238RW PDF / likely newer pinout

Table

PinPDF/newer MM238RW functionFlux symbolStatus
1GNDCH1Mismatch
2Video OutputCH2Mismatch
3NCCH3Mismatch
4RSSIGNDMismatch
5+3.3V to +5V Input+3.3~5VMatch
6GNDRSSIMismatch
7CH3 / SPI CLK6.5MMismatch
8CH2 / SPI LEVideoMismatch
9CH1 / SPI DATAGNDMismatch
10GNDGNDMatch
11GNDANTMismatch
12GNDGNDMatch
13ANT Signal InputGNDMismatch
14GNDGNDMatch
Footprint Cross-Check
Current Flux footprint
  • 14 rectangular SMD pads.
  • Pad size rule: 2.2 mm × 1.8 mm.
  • Module outline rectangle: 28 mm × 23 mm.
  • Pad arrangement:
    • Left column at x = -14 mm: pins 1–9 side positions in 2.54 mm pitch-like spacing, with populated pads for pins 1 through 9.
    • Right column at x = +14 mm: pins 10–14 side positions, including ANT and ground pads.
  • No explicit package property was found beyond the footprint geometry.
Mechanical comparison
  • The 28 mm × 23 mm outline matches the official English product page dimensions.
  • The PDF/newer listing gives 28.4 mm × 23 mm × 3.3 mm, so the current outline may be 0.4 mm short in length if that newer document is the intended source.
  • The 14-pad count matches all found sources.
  • Pad sizes and exact pad coordinates could not be fully verified from text alone; they appear plausible for castellated/edge module pads but should be confirmed visually against the mechanical drawing image/PDF before fabrication.
Mismatches / Risks Flagged
  1. Major source conflict: pinout depends on which MM238RW documentation is authoritative.
    • Current Flux symbol matches the official English product page / MM238RW-MCU-style pin table reasonably well.
    • It does not match the search-discovered MM238RW PDF or FlyTo Chinese V1.0-style pinout.
  2. Pin 7 naming is ambiguous.
    • Current symbol uses 6.5M.
    • English table calls this Audio AL Out; audio carrier spec mentions 6.5 MHz / AL.
    • Recommended label: Audio_AL or 6.5M/Audio_AL with pin description noting audio output.
  3. SPI pin descriptions are missing.
    • If using the English page table, pins should describe CH1 = DATA, CH2 = LE, CH3 = CLK.
  4. Pin 5 direction/description is ambiguous.
    • English table says +3.3~+5V Out, but circuit context and PDF indicate module supply input.
    • Current label +3.3~5V is acceptable as a rail label, but the pin description should explicitly state whether it is supply input for the selected module revision.
  5. Pin Type properties are all Unspecified.
    • Recommend assigning Electrical/Passive/Power/Input/Output-style pin types where supported: GND = Power/Ground, supply = Power, ANT = RF input, Video/Audio/RSSI = outputs, CH1/CH2/CH3 = digital inputs.
  6. Terminal Order duplicates exist across sides.
    • Several terminals share Terminal Order values, especially right-side pins. This may be cosmetic, but should be cleaned if ordering consistency matters.
  7. Footprint dimensions may be revision-specific.
    • Current outline matches 28 × 23 mm; newer source says 28.4 × 23 mm. Confirm the actual module revision before manufacturing.
Recommendation
Before changing the symbol, decide which physical module revision this Flux part should represent:
  • If the part is intended to follow the current official English Datasheet URL, keep the current pin numbering but improve pin descriptions and rename pin 7 to clarify audio output.
  • If the part is intended to represent the newer MM238RW V1.0 / PDF pinout, the symbol and footprint pad-to-pin mapping need a substantial correction, especially pins 1–9 and 11–13.
Because the current Datasheet URL points to the English official page, I did not automatically rewrite the pinout.

  • Scope

  • Existing Flux Part Metadata

  • Source Documents Checked

  • Key Specifications Found

  • Schematic Symbol Cross-Check

  • Current Flux terminals

  • Match against official English product page pin table

  • Match against search-discovered MM238RW PDF / likely newer pinout

  • Footprint Cross-Check

  • Current Flux footprint

  • Mechanical comparison

  • Mismatches / Risks Flagged

  • Recommendation

Documents

  • MM238RW Part Review

Assets

MM238RW-thumb.png

MM238RW-thumb.png

MM238RW-thumbThumbnail

MM238RW

MM238RW thumbnail
FLYTO MM238RW 5.8G 4.9G 6.0G Wireless FPV Video Transmission Open-Source Receiver with SPI High Sensitivity
The MM238RW is a high-sensitivity analog FPV (First-Person View) video receiver module designed for wireless image transmission systems operating in the 4.9 GHz, 5.8 GHz, and 6.0 GHz bands. It supports SPI control for frequency configuration and integration into custom embedded systems, FPV goggles, ground stations, and video receivers. The module provides low-latency CVBS video output, strong anti-interference performance, and wide compatibility with analog FPV video transmitters.
Key Features Wide receiving frequency range: 4900 MHz to 5945 MHz SPI interface for channel and frequency control High receiver sensitivity of up to −90 dBm Low-latency analog CVBS video output FM/PLL demodulation architecture Excellent anti-interference performance 50 Ω RF input impedance Supply voltage: 3.3 V to 5.0 V Typical current consumption: 220 mA Compact module suitable for FPV goggles, monitors, and ground stations Supports custom firmware and open-source development platforms Applications FPV racing drones UAV and aerial photography systems Ground station receivers FPV goggles Wireless analog video monitoring Custom RF video receiver designs
Hashtags: #MM238RW #FPV #VideoReceiver #5_8GHz #SPIInterface #DroneElectronics #WirelessVideo #CVBS #RFModule #UAV #FPVGoggles #EmbeddedSystems #AerialPhotography #LowLatency #OpenSourceFPV

Properties

MM238RW

Flymod Technology Co., Ltd.

Module

flytofpv.com/product/MM238RW-Wireless-FPV-Video-Transmission-Open-Source-Receiver-with-SPI-High-Sensitivity-e.html

U

parametric-v1

creativecommons.org/licenses/by/4.0/

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