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AS3933 LF Receiver IC

Programmable 3D LF wake-up receiver


  • Reliable wake-up pattern
  • 80µV wake-up sensivity
  • Low power listening mode (2.3µA)
  • One-, two- or three-channel operation


  • Eliminates false wake-up
  • Provides long range wake-up
  • Enables long battery life
  • Works with 3D antenna

Product parameters

Channels [#] 3
Wake-Up Sensitivity [µVpp] 225
LF Carrier Freq. Range [kHz] 15 - 150
Data Rate (Manch.) [kbit/s] 0.5 - 4
Dynamic Range [dB] 64
RSSI Step [dB] 2
Package TSSOP16 \ QFN-16 (4x4)
Features 32bit programmable wake-up pattern
Supply [V] 2.4-3.6V
Current Consumption [(PD/Listening/Active) µA] -/2.3/8.3
Interface Serial Peripheral Interface
Temperature Range [°C] -40 to +85

General Description

The AS3933 is a 3-channel ASK receiver that generates a wake-up signal upon detection of a data signal with a carrier frequency in the range of 15-150 kHz. It can be used to wake-up active tags in RTLS, PKE and other similar tracking and access control systems.

This product suits for the following applications:

  • Active RFID tags
  • Real-time location systems (RTLS)
  • Operator identification
  • Passive keyless entry (PKE)
  • Wireless sensors


Title Category Headline Buy
AS3933DemoKit Application Board Demo Kit for AS3933


Name Type Description Language Software Eval SW 3.0.2 English Software Eval SW 3-0-2-0 English

Technical Documents

Name Type Description Version Language
AS3933_AN000256_2-00.pdf Application Note RSSI to voltage 2-00 English
AS3933_AN000191_1-00.pdf Application Note WAKE timing 1-00 English
AS3933_AN000164_1-00.pdf Application Note Design guide 1-00 English
AS3933_AN000106_1-00.pdf Application Note Demodulator / Data slicer 1-00 English
AS3933_AN000297_1-00.xlsx Application Note Frequency detection range 1-00 English
AS3930_32_33_AN000255_2-00.pdf Application Note Non-univocal pattern detection (v1-04) 2-00 English
AS3933_BD000317_1-00.png Block Diagram AS3933 Block Diagram 1-00 English
AS3933_DS000353_1-00.pdf Datasheet Document version 1-08 1-00 English
AS3933_PD000119_1-00.pptx Other Product Document LF wakeup Rx 1-00 English
AS3933_PD000319_1-00.png Other Product Document AS3933DemoKit Image 1-00 English
AS3933_UG000278_1-00.pdf User Guide Standard board DK - Dev System 1-00 English

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