W55RFS27R3C Datasheet, PDF (3/13 Pages) Winbond – Super-Regeneration RF Receiver

W55RFS27R3C
1. GENERAL DESCRIPTION
The Winbond W55RFS27R3C is a fully integrated, S-R (Super-regeneration) RF receiver with full-
function baseband command decoder for R/C vehicles, toys, or wireless data communication
applications.
The W55RFS27R3C provides two input modes: uC-mode, for general-purpose, micro-controller
interfaces to the RF transmitter (the decoder is disabled); and manual-mode, for a 6-function,
baseband command decoder and RF receiver. Manual-mode is also designed with the Winbond-
patented ChannelShared^WB protocol for multi-player applications, and up to three players are allowed
simultaneously in the same frequency band. As a result, the W55RFS27T3B / W55RFS27R3C provide
a simple remote control capability for multiple players with low cost and high performance.
In addition, the W55RFS27R3C accommodates a wide range of operating voltages (2.2 ~ 5.5 V) and
supports 2- or 3-battery applications.
The associated transmitter W55RFS27T3B meets FCC/ETSI regulations for 27 MHz, 40 MHz, and 49
MHz S-R (Super-regeneration) demodulation.
1.1 W55RFS27R3C Features
y Winbond patented ChannelShared^WB protocol enables a maximum of three players
simultaneously in one frequency band.
y On-chip LNA provides better isolation so that receivers can work together without interference.
y Enhanced receiver circuit provides higher sensitivity than traditional super-regenerative circuits.
y Operating frequencies: 27 MHz to 49 MHz (depending on the oscillator frequency)
y Operating voltages: 2.2 V ~ 5.5 V
y (uC-mode) Receiving data rates up to 2.5 Kbps for 50% duty cycle signals
y (manual-mode) R/C-toy baseband control command decoder, supporting 6 functions; Forward,
Backward, Left-turn, Right-turn, and 2 user-defined functions F1 and F2
y (manual-mode) Frequency hopping increases receiver sensitivity
y Power-down current consumption less than 1 µA
y Associated transmitter W55RFS27T3B is compliant with FCC part 15 Subpart C 15.227 / ETSI 300
220-1 low-power and short-range device requirements
y Operating temperature: 0°C ~ 70°C
Publication Release Date: May 31, 2005
-3-
Revision A1