W55RFS27T3 datasheet(6/12 Pages) NUVOTON

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W55RFS27T3 DataSheet

Revision: A3.0

Publish Date: Dec. 2010

- 6 -

Revision A1

2.2 W55RFS27T3 Functional Description

W55RFS27T3 provides two operation

modes for convenient remote control product

development, named Manual-mode and uC-mode.

Manual-mode provides a powerful

baseband command encoder, which perform 6-

function binary data encode and direct output to

control the on-chip RF transmitter. The encoder

integrate Winbond patented ChannelShared

technology in it and allow at most 3 players at the

same time. The 6-function can be Forward,

Backward, Left-turn, Right-turn for general R/C-

vehicle control and 2 other user-defined functions.

Auto power down function save battery life when

all inputs are released.

It is very convenient to do remote control

if W55RFS27T3 and its associated receiver/decoder

W55RFS27R3B are adopted.

The uC-mode provides digital interface for

external micro-controller to control the transmitter

easily and efficiently. The micro-controller only

needs two pins, TXD (S1) to send data and ENB

(S2) to enter power down mode, if needed.

The transmitter provides the FCC/ETSI

regulation provisions for 27M and 49MHz S-R

(Super-regeneration) modulation. Wide range of

operation voltage from 2.2V to 5.5V is suitable for

2-battery or 3-battery R/C toy application, and

15dBm high efficient transmission output power.

W55RFS27T3 Super-regeneration RF transmitter is

compliant to 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.

Electronic Characteristics

3.1 W55RFS27T3 Absolute Maximum Ratings

Parameter

Rating

Unit

Supply Voltage to Ground Potential

- 0.3 to 6.5

Applied Input/Output Voltage

- 0.3 to 6.5

Power Dissipation (Ta = 70C)

150

Ambient Operating Temperature

0 to 70

C

Storage Temperature

-40 to 85

C

Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device.

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