component

VI521R

Public Unreviewed

by Ray

VIBRATION RFID ICs, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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PCB Footprint

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Datasheet

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Contents

README

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VI521R

VIBRATION · RFID ICs · SOP-8

VI521R from VIBRATION, in a SOP-8. 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 GND power_in Ground reference (0 V) for the receiver.
2 ANT input RF signal input pin; connects to the external LC matching network and antenna. Operates over 300-490 MHz with saturation input level -20 dBm.
3 VDD power_in Positive supply input, 2.2-5.0 V typical (absolute max 5.5 V). Typical operating current 5.0 mA @ 315 MHz, 5.2 mA @ 433.92 MHz.
4 CTH passive Received-data filter node; requires an external filter capacitor to ground (typically 1-4.7 uF X7R).
5 DOUT output Demodulated digital data output from the OOK/ASK slicer/comparator.
6 ST input Shutdown control input. High level shuts the chip down (shutdown current ~0.3 uA); low level enables the receiver. Startup time from ST falling edge to valid data is 3.6 ms.
7 NC unconnected No connect; leave floating.
8 XI passive Crystal oscillator input pin; connects to an external crystal (single-ended oscillator, load capacitors integrated on-die). Recommended crystal: ±20 ppm, ESR <60 Ω, CL=15 pF; e.g. 13.51783-13.52127 MHz for 433.92 MHz operation, 9.8131-9.81563 MHz for 315 MHz operation.

Key specifications

Parameter Value
Manufacturer VIBRATION
Package SOP-8
Category RF And Wireless
Pins 8

CAD (KiCad official)

  • Symbol: VI521R
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: VIBRATION datasheet (8 pp, sha256 0e9262c94906c97e, retrieved 2026-08-17, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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).

Datasheet PDF