W55RFS27T3B Datasheet, PDF (6/16 Pages) Winbond – SUPER-REGENERATION RF RECEIVER

W55RFS27T3B
2.2 W55RFS27T3B Functional Description
The W55RFS27T3B provides two operating modes, Manual-mode and uC-mode, for remote control
product development.
In Manual-mode, the W55RFS27T3B encodes one of up to six functions for one of up to three players,
modulates it with the on-chip RF power amplifier, and transmits it to the receiver(s) (e.g.,
W55RFS27R3C). This transmission occurs in the same frequency band for all players, as this
frequency band is divided using a Winbond-patented, channel-sharing algorithm. Manual-mode
supports up to six functions: Forward, Backward, Left-turn, Right-turn (for general R/C-vehicle control)
and two user-defined functions F1 and F2.
uC-mode provides a digital interface for any external micro-controller to control the S-R RF transmitter
easily and efficiently. This interface uses two W55RFS27T3B pins: TXD (S1), to send data; and ENB
(S2), to tell the W55RFS27T3B to enter and exit power-down mode, as needed.
The transmitter meets FCC/ETSI regulations for 27 MHz, 40 MHz and 49 MHz S-R (Super-
regeneration) modulation, and it is compliant with FCC part 15 Subpart C 15.227(15.235) and ETSI
300 220-1, making it easier for wireless end products to get FCC and ETSI compliance approval..
In addition, the W55RFS27T3B accommodates a wide range of operating voltages (2.2 V to 5.5 V),
supports 2- or 3-battery R/C toy applications, and transmits at 15 dBm very efficiently.
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