text.skipToContent text.skipToNavigation

Manufacturer Part #


MICRF221 Series 10 kbps 9 ma Surface Mount QwikRadio® Receiver - QSOP-16

Mfr. Name: Microchip
Standard Pkg:
Product Variant Information section
Date Code: 1615
Product Specification Section
Technical Attributes
Attributes Table
Frequency Range: 850MHz to 950MHz
Data Rate: 10kbps
Supply Current: 9mA
Supply Voltage: 3V to 3.6V
Sensitivity: -109dBm
Operating Temp Range: -40°C to +105°C
Storage Temperature Range: -65°C to +150°C
No of Terminals: 16
Dimension: 4.9 x 3.91 x 1.47 mm
Package Style:  QSOP-16
Mounting Method: Surface Mount
Features & Applications

The MICRF221AYQS is a 3.3 V QwikRadio Receiver available in 16-Pin QSOP package and its a part of MICRF221 series . It works at a Operating frequency ranging between 850 MHz to 950 MHz.

The MICRF221 is a third generation QwikRadio ® receiver, offering all the benefits of Micrel's earlier QwikRadio products with significant improvements, including: enhanced sensitivity, automatic duty-cycle feature and RSSI output.

The MICRF221 is a super-heterodyne receiver, designed for OOK and ASK modulation. The down-conversion mixer also provides image rejection. This receiver provides a SLEEP Mode for duty-cycle operation and an enhanced, customer programmable "WAKE" function. These features are further combined into a wholly integrated "self-polling" scheme that is ideal for low and ultra-low power applications, such as RKE and RFID .


  • Complete Receiver on a Chip
  • -109dBm sensitivity, 1 kbps and BER 10E-02
  • Image Rejection Mixer
  • 850 MHz to 950 MHz frequency range
  • Low Power, 9 mA @ 868 MHz, continuous on
  • Data Rates to 10kbps ( Manchester Encoded)
  • Auto polling (sleep mode, current < 0.1 mA)
  • Analog RSSI Output
  • Programmable “Low Sensitivity” mode
  • No IF filter required
  • Excellent selectivity and noise rejection
  • Low external part count
  • Additional Functions Programmed through serial interface
Pricing Section
Minimum Order:
Multiple Of:
On Order:
Factory Stock:Factory Stock:
Factory Lead Time:
10 Weeks
Web Price
Product Variant Information section