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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


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

Technical Documents

Type Description Language
Datasheet Document version 1-08 English
Application Note RSSI to voltage English
Application Note WAKE timing English
Application Note Design guide English
Application Note Demodulator / Data slicer English
Application Note Frequency detection range English
Application Note Non-univocal pattern detection (v1-04) English
Other Product Document LF wakeup Rx English

Environmental Documents

Type Description Language
RoHS Certificate RoHS Certificate AS3933 English

Other Information

Type Description Language
Block Diagram AS3933 Block Diagram English
Other Product Document AS3933DemoKit Image English

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