W55RFS27T1B Datasheet, PDF (2/17 Pages) Winbond – SUPER-REGENERATION RF TRANSMITTER

W55RFS27T1B
1. GENERAL DESCRIPTION
The Winbond W55RFS27T1B is a fully integrated, S-R (Super-regeneration) RF transmitter with
full-function baseband command encoder for R/C vehicles, toys, or wireless data communication
applications.
The W55RFS27T1B provides two input modes: uC-mode, for general-purpose, micro-controller
interfaces to the RF transmitter; and manual-mode, for a 6-function, baseband command encoder and
RF transmitter that works conveniently with the W55RFS27R1B to provide a simple remote control
capability with low cost and high performance.
The S-R RF transmitter meets FCC/ETSI regulations for 27 MHz, 35 MHz, 40 MHz, and 49 MHz S-R
(Super-regeneration) modulation, and it is compliant with FCC part 15 class B and 15.227 / ETSI 300
220-1, making it easier for wireless end products to get FCC and ETSI compliance approval.
In addition, the W55RFS27T1B accommodates a wide range of operating voltages (2.2 V to 5.5 V),
supports 2-battery or 3-battery R/C applications, and transmits very efficiently.
1.1 Features
• Operating frequency: 27 MHz ~ 49 MHz
• Wide operating voltage: 2.2 V ~ 5.5 V
• Two input modes—uC-mode and manual-mode—for more flexibility
• (uC-mode) Transmission data rate up to 10 Kbps for 30%-70% duty-cycle signals
• (manual-mode) R/C-toy baseband control command encoder, supporting 4 or 6 functions; Forward,
Backward, Left-turn, Right-turn, and 2 user-defined functions F1 and F2 (user-defined functions not
available in 4-function mode)
• Highly-efficient transmissions with minimum current consumption
• Power-down current consumption less than 1uA
• Fewer external components required
• Compliant with FCC part 15 class B and 15.227 / ETSI 300 220-1 low-power and short-range device
requirements
• Dice form available for PCB bonding
• Operating temperature: 0°C ~ 70°C
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