W55RFS27R1B Datasheet, PDF (2/15 Pages) Winbond – SUPER-REGENERATION RF RECEIVER

W55RFS27R1B
1. GENERAL DESCRIPTION
The Winbond W55RFS27R1B 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 W55RFS27R1B 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 that works conveniently with the W55RFS27T1B to
provide a simple remote control capability with low cost and high performance.
The W55RFS27R1B includes the Smart-Detector^WB function, which makes the W55RFS27R1B the
most suitable receiver for mass-produced applications. Smart-Detector^WB overcomes the effects of
component deviation and various kinds of environmental problems, such as temperature, moisture, or
object-caused, antenna characteristic changes, to maintain maximum sensitivity.
The Super-Regenerative RF front-end architecture operates at 27 MHz, 35 MHz, 40 MHz, or 49MHz
with a minimum number of external components. In addition, the W55RFS27R1B accommodates a
wide range of operating voltages (2.1 V to 5.5 V) and supports 2- or 3-battery R/C applications.
1.1 W55RFS27R1B Features
• Operating frequencies: 27 MHz, 35 MHz, 40 MHz, 49 MHz
• Smart-Detector^WB function overcomes component deviation and environmental problems to
maintain highest sensitivity
• Wide operating voltage: 2.1 V ~ 5.5 V
• S-R (Super-regeneration) demodulation scheme
• (uC-mode) Receiving data rates up to 1.25Kbps for 50% duty cycle signals
• (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
• Minimum current consumption
• Very low power-down current consumption (uC-mode only)
• Minimum number of external components
• Dice form available for PCB bonding
• Operating temperature: 0°C ~ 70°C
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