BOM-DAT/BOM-DAT.md
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- [[infrared-dat]] - [[LDO-dat]]
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+## generate footprint descriptions
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+
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+CAP 4.7UF, 0805, 10%, MLCC, 50V, X5R, ROHS
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+
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+RES 1K 5%, 0805, THICK FILM, 150V, 1/8W, ROHS
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+
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+Here's a breakdown of the structure:
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+
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+- CAP/RES: Component Type (Capacitor or Resistor)
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+- 4.7UF/1K: Value (4.7 Microfarads or 1 Kiloohm)
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+- 0805: Package Size (0805 is a standard SMD package size)
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+- 10%/5%: Tolerance (10% or 5% variation in value)
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+- MLCC/THICK FILM: Technology or Type (Multi-Layer Ceramic Capacitor or Thick Film Resistor)
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+- 50V/150V: Voltage Rating (50 Volts or 150 Volts)
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+- X5R: Dielectric (Specific to capacitors, defines temperature characteristics)
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+- 1/8W: Power Rating (1/8 Watt, specific to resistors)
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+- ROHS: RoHS Compliant (Restriction of Hazardous Substances)
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+
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+LED SMD VERMELHO, 0805, 2V, 25MA, 624NM, 60MCD, 140°, ROHS
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+
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+- "VERMELHO" is Portuguese for red.
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+- 624nm wavelength corresponds to red light on the visible spectrum.
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+- Other details like 2V, 25mA, and 60mcd just describe electrical and luminous specs.
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+
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+### Electronic Industries Alliance (EIA)
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+
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+EIA 3528-21 Meaning
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+
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+| Section | Description |
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+| ------- | --------------------------------------------------------------------------------------------------------------- |
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+| 3528 | Physical size of the component in hundredths of inches: 3.5 mm x 2.8 mm (i.e., 0.138" x 0.110") |
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+| -21 | Indicates a specific height and pad layout variation within the 3528 size range. Typically means ~2.1 mm height |
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+
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+
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+CRISTAL 12MHz, SMD, 3.2X2.5MM, 18PF, 20PPM, ROHS
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+
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+This corresponds to the standard 3225 SMD package (also known as EIA 3225 or 3.2x2.5mm SMD crystal).
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+
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+### IND FILTRO MODO COMUM,100uH,+50/-30%,0.2A,7.5k/10MHz,1812,RO
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+| Term | Meaning |
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+| ------------------------- | ------------------------------------------------------------------------------------ |
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+| **IND FILTRO MODO COMUM** | Common Mode Filter Inductor — used to suppress EMI/RFI by blocking common-mode noise |
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+| **100µH** | Inductance value: 100 microhenries (μH) |
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+| **+50/-30%** | Tolerance range: +50% to -30% |
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+| **0.2A** | Maximum rated current: 0.2 Amps (200mA) |
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+| **7.5k/10MHz** | Impedance: 7.5 kΩ at 10 MHz — blocks high-frequency noise effectively |
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+| **1812** | Package size: 1812 (0.18" x 0.12" or 4.6 mm x 3.2 mm) SMD footprint |
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+| **RO** | RoHS compliant (lead-free and environmentally safe) |
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+
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+## IND FILTRO MODO COMUM, 4A, 700Ω/100MHz, 2824, ROHS
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+
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+| Term | Meaning |
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+|---------------------------|-------------------------------------------------------------------------|
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+| **IND FILTRO MODO COMUM** | Common Mode Filter Inductor — used to suppress EMI/RFI by blocking common-mode noise |
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+| **4A** | Maximum current: 4 Amps — suitable for high-current applications |
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+| **700Ω / 100MHz** | Impedance: 700 ohms at 100 MHz — blocks high-frequency noise effectively |
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+| **2824** | Package size: 2824 (7.1 mm × 6.0 mm) — Surface Mount Device (SMD) |
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+| **ROHS** | RoHS compliant — lead-free and environmentally safe |
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+## 0.8-6P-Pitch Type C vertical WTB capping
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+| Term | Meaning |
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+|------------------|-------------------------------------------------------------------------|
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+| **0.8** | Pitch: 0.8 mm — distance between adjacent pins |
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+| **6P** | 6 Pins — total number of electrical contacts |
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+| **Pitch Type C** | Likely refers to a connector family/style (Type C) with a specific profile or housing style |
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+| **Vertical** | Vertical mount orientation on the PCB |
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+| **WTB** | Wire-to-Board — used to connect cables/wires directly to a PCB |
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+| **Capping** | May include a top-entry cap, locking feature, or closed housing design |
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+
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## ref
Chip-cn-dat/Fibocom-dat/Fibocom-dat.md
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+
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+# Fibocom-dat
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+
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+https://www.fibocom.com/index.html == 广和通
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+
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+
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+- NL668 4G
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+- L850-GL 4G
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+- FM350-GL 3G/4G/5G
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+
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+
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+- [[M2M-dat]]
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\ No newline at end of file
Tech-dat/Network-dat/M2M-dat/M2M-dat.md
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@@ -103,6 +103,9 @@ LBS = Base station location, AT+CLBS
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ASR1603
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ASR1606
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+## Module manufacturer
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+- [[fibocom-dat]] - [[simcom-dat]] - [[quectel-dat]]
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## ref
weekly-dat/week-10-11-dat/week-10-11-dat.md
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@@ -19,6 +19,7 @@ This a weekly update newsletter, to briefly tell you whats new and whats fun we
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- [[Millimeter-wave-radar-dat]] advantages compare to [[PIR-sensor-dat]]
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+- new shipping rules find out for US [[US-dat]]
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## Dissusion, Feedback, To-do
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