component
PE4251MLI-Z
Public Unreviewedby Ray
pSemi RF Switches, MSOP-8-EP. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownPE4251MLI-Z
pSemi · RF Switches · MSOP-8-EP
PE4251MLI-Z from pSemi, in a MSOP-8-EP. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | V2 | input | Dual-function pin. In single-pin control mode, this pin receives a nominal 3.3 V or 5.0 V supply (VDD). In complementary-pin control mode, this pin is driven by a CMOS logic signal complementary to V1 to steer the RF path. Logic thresholds: VIH >= 0.8 x VDD, VIL <= 0.2 x VDD. |
| 2 | V1 | input | Switch control input, CMOS logic level (3.3 V or 5.0 V compatible). Selects which RF port (RF1 or RF2) is connected to RFC per the truth tables. VIH >= 0.8 x VDD, VIL <= 0.2 x VDD. |
| 3 | RFC | passive | RF common port of the SPDT switch, 50 ohm nominal impedance, 10-4000 MHz. Must be DC-blocked with an external series capacitor or held at 0 VDC. |
| 4 | N/C or GND | passive | May be left as a no-connect or tied to ground. Grounding is typical for best RF performance and layout continuity. |
| 5 | RF1 | passive | RF1 throw port, 50 ohm nominal impedance, 10-4000 MHz. Connected to RFC when selected by the control logic. Must be DC-blocked with an external series capacitor or held at 0 VDC. |
| 6 | GND | power_in | Ground connection. Traces should be physically short and connected to the ground plane for best RF performance. |
| 7 | GND | power_in | Ground connection. Traces should be physically short and connected to the ground plane for best RF performance. |
| 8 | RF2 | passive | RF2 throw port, 50 ohm nominal impedance, 10-4000 MHz. Connected to RFC when selected by the control logic. Must be DC-blocked with an external series capacitor or held at 0 VDC. |
| 9 | GND (Paddle) | power_in | Exposed ground paddle on package underside. Must be soldered to the PCB ground plane for proper device operation, thermal dissipation, and RF grounding. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | pSemi |
| Package | MSOP-8-EP |
| Category | RF And Wireless |
| Pins | 9 |
Ordering variants
Same part, different packaging or reel option.
PE4251MLI-Z
CAD (KiCad official)
- Symbol:
PE4251MLI-Z - Footprint:
Package_SO:MSOP-8-1EP_3x3mm_P0.65mm_EP1.5x1.8mm - 3D model: MSOP-8-EP (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: pSemi datasheet (10 pp, sha256
5f41f8e638c00503, retrieved 2026-08-17, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).