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W55RFS27T1B Data Sheet SUPER-REGENERATION RF TRANSMITTER
Table of Contents1. GENERAL DESCRIPTION .................................................................................................................. 2 1.1 Features ..................................................................................................................................... 2 1.2 W55RFS27T1B Pad Definition................................................................................................... 3
1.2.1 1.2.2 1.2.3 1.2.4 Pad Description...........................................................................................................................3 Clock Frequency Select (CKSEL) Setup.....................................................................................3 uC-Mode & Manual Mode (Baseband Data Rate) Setup ............................................................4 Baseband Encoder Control Function Description .......................................................................4
2. SYSTEM DESCRIPTION..................................................................................................................... 5 2.1 W55RFS27T1B System Block Diagram .................................................................................... 5 2.2 W55RFS27T1B Functional Description ..................................................................................... 6 3. ELECTRONIC CHARACTERISTICS................................................................................................... 7 3.1 W55RFS27T1B Absolute Maximum Ratings ............................................................................. 7 3.2 W55RFS27T1B DC Characteristics........................................................................................... 7 3.3 W55RFS27T1B Ordering Information........................................................................................ 8 3.4 W55RFS27T1B Package Information........................................................................................ 8
3.4.1 3.4.2 Bonding Pad List .........................................................................................................................8 Bonding Pad Diagram .................................................................................................................9
4. DESIGN INFORMATION ................................................................................................................... 10 4.1 W55RFS27T1B Reference Design .......................................................................................... 10
4.1.1 4.1.2 4.1.3 4.1.4 TXOUT waveform .....................................................................................................................10 Application Circuit for 6 Control Functions ................................................................................11 Application Circuit for 4 Control Functions ................................................................................12 Application Circuit for FCC........................................................................................................14
4.2 uC-Mode Control Signal........................................................................................................... 15 4.3 W55RFS27T Family FCC Certification .................................................................................... 16 5. REVISION HISTORY......................................................................................................................... 17
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Publication Release Date:May 24, 2005 Revision A3
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: 0C ~ 70C
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W55RFS27T1B
1.2 W55RFS27T1B Pad Definition
1.2.1 Pad Description
PAD NO.
SYMBOL
I/O
FUNCTIONAL DESCRIPTION
S3 S4 CKSEL0 TEST CKSEL1 ANT GND VDD RESET X1 X2 ID1 ID0 TXOUT S1/~TXD S2/~ENB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
I I I I I O Ground Power I I O I I O I I
Manual-mode input, internal pull-high Manual-mode input , internal pull-high Clock frequency select LSB (please see section 1.2.2 for setup) TEST=0 for 6-function mode, TEST=1 for 4-function mode Clock frequency select MSB (please see section 1.2.2 for setup) RF signal output. An external matching circuit is necessary for connecting with an antenna. Ground return path Power path RESET=0 resets whole chip, internal pull-high Input of internal crystal oscillator to connect to an external crystal Output of internal crystal oscillator to connect to an external crystal ID setting MSB (please see section 1.2.3 for setup) ID setting LSB (please see section 1.2.3 for setup) TXD Data output Manual-mode input or uC-mode: ~TXD, internal pull-high Manual-mode input or uC-mode: ~ENB, internal pull-high
1.2.2 Clock Frequency Select (CKSEL) Setup
(CKSEL1,CKSEL0) CLOCK FREQUENCY
(0,0) (0,1) (1,0) (1,1)
27.145 MHz 35.48 MHz 40.68 MHz 49.86 MHz
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Publication Release Date:May 24, 2005 Revision A3
W55RFS27T1B
1.2.3 uC-Mode & Manual Mode (Baseband Data Rate) Setup
(ID1,ID0) FUNCTION ENCODER TIME BASE
(0,0) (0,1) (1,0) (1,1)
Data Rate = 2.5 KBPS Data Rate = 1.25 KBPS Data Rate = 0.625 KBPS uC-Mode
T = 200 us T = 400 us T = 800 us Externally-controlled
(Note: W55RFS27R1B Data Rate = 1.25 KBPS; W55RFS27R1A Data Rate = 2.5 KBPS)
1.2.4 Baseband Encoder Control Function Description
6-FUNCTION (TEST=0) 4-FUNCTION (TEST=1)
INPUT PIN NAME
CONNECT TO
Default (pull high) S1 GND TXOUT Default (pull high) S2 GND TXOUT S3 S4
(Note: F Forward; B
F = 0, B = 0 F = 0, B = 1 F = 1, B = 0 L = 0, R = 0 L = 0, R = 1 L = 1, R = 0 F1 = 0 F1 = 1 F2 = 0 F2 = 1
F=0 F=1 B=0 B=1 L=0 L=1 R=0 R=1
Default (pull high) GND Default (pull high) GND
Backward; L Left-turn; R Right-turn; F1, F2
two user-defined functions)
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W55RFS27T1B
2. SYSTEM DESCRIPTION
2.1 W55RFS27T1B System Block Diagram
IDn
CKSEL
X1
X2
S1
/n
Oscillation (27~49 MHz)
S2 Encoder Control Circuit
$TXD $ENB
S3
S4
POR
PA
ANT
VDD
GND
TEST
RESET
TXOUT
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Publication Release Date:May 24, 2005 Revision A3
W55RFS27T1B
2.2 W55RFS27T1B Functional Description
The W55RFS27T1B provides two operating modes, Manual-mode and uC-mode, for remote-control product development. In Manual-mode, the W55RFS27T1B encodes one of up to six functions, modulates it with the on-chip RF power amplifier, and transmits it to the receiver (e.g., W55RFS27R1B). This 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. The micro-controller only uses two pins: TXD (S1), to send data; and ENB (S2), to tell the W55RFS27T1B to enter and exit power-down mode, as needed. The 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 at 15 dBm very efficiently.
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W55RFS27T1B
3. ELECTRONIC CHARACTERISTICS
3.1 W55RFS27T1B Absolute Maximum Ratings
PARAMETER RATING UNIT
Supply Voltage to Ground Potential Applied Input/Output Voltage Power Dissipation (Ta = 70C) Ambient Operating Temperature Storage Temperature
- 0.3 to 6.5 - 0.3 to 6.5 150 0 to 70 -40 to 85
V V mW C C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device.
3.2 W55RFS27T1B DC Characteristics
(VDD-VSS = 3 V, Ta = 25C; unless otherwise specified)
PARAMETER
Power Supply Operating Voltage Operating Current (uC-mode) Stand-by Current
SYM.
VDD ITX ISBY
CONDITIONS
MIN.
2.2
TYP.
-
MAX.
5.5 50 1
UNIT
V mA A
Continuous emission
0.8*VD
D
Digital Input/Output Pin (S1, S2, S3, S4, ID0, ID1, MODE,CKSEL0,CKSEL1) Input High Voltage Input Low Voltage Input Pin Pull-high Resistance TXOUT Output High Source Current TXOUT Output Low Sink Current Crystal Oscillator Operation Frequency Oscillator Turn-On Time Transmitter Section Modulation Duty Cycle Transmission Data Rate Transmission Power MDYT RDTT PANT 50% Duty-cycle, Manchester Code 30 50 1.25 15 70 10 % Kbps dBm FXTL TOSC Fundamental type Over-tone type 27 49 1.0 3.0 MHz mS mS VIH VIL RPH IOH IOL S1~S4, RESET VOH=0.7 * VDD VOL=0.3 * VDD 150K VDD 0.1*VD
D
V V Ohm mA mA
VSS 6 6
-
Notes: (1). Crystal turn-on time depends on crystal type: fundamental or overtone type crystal. (2). Transmitter settling time depends on crystal type: fundamental or overtone type crystal.
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Publication Release Date:May 24, 2005 Revision A3
W55RFS27T1B
3.3 W55RFS27T1B Ordering Information
The W55RFS27T1B is available in two forms: Dice form and wafer form.
PART NUMBER PACKAGE REMARKS
W55RFS27T1B(H) W55RFS27T1B(W)
Dice form Wafer form
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3.4 W55RFS27T1B Package Information
3.4.1 Bonding Pad List
Window : (xl = -620.000, yl = -635.000),(xh = 620.000, yh = 635.000) Windows size : Width = 1240.000, length = 1270.000 ============================================================================ PAD NO PAD NAME PIN NAME X Y ----------------------------------------------------------------------------1 S3 1 -535.000 -69.260 2 S4 2 -535.000 -360.520 3 CKSEL0 3 -535.000 -484.865 4 TEST 4 66.325 -550.000 5 CKSEL1 5 173.325 -550.000 6 ANT 6 282.725 -550.000 7 * VSS *7 535.000 -218.395 8 VDD 8 535.000 20.945 9 RESET 9 535.000 284.600 10 X1 10 245.005 550.000 11 X2 11 138.005 550.000 12 ID1 12 31.005 550.000 13 ID0 13 -75.995 550.000 14 TXOUT 14 -288.420 550.000 15 S1 15 -535.000 329.000 16 S2 16 -535.000 37.740 ============================================================================ (*: Bonding Sequence start from VSS(Pin7))
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W55RFS27T1B
3.4.2 Bonding Pad Diagram
3
2
1
1
1 1
4 5 6
W55RFS27T1
1 1
LOGO
1 9 1
*7
8
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Publication Release Date:May 24, 2005 Revision A3
W55RFS27T1B
4. DESIGN INFORMATION
4.1 W55RFS27T1B Reference Design
4.1.1 TXOUT waveform
TEST ANT 1 1 2 2 TEST=0
... ...
16 16
TXOUT
Power down Any key pressed Key STOP
TEST ANT 1 2
TEST=1
...
16
TXOUT
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W55RFS27T1B
4.1.2 Application Circuit for 6 Control Functions
Set TEST = 0. 1. Use this circuit when F1 and F2 are required (i.e., when more than 4 functions are required). 2. When a 9-V battery is used, an external power switch is required to save power. 3. LEDs require extra components.
VSPLY
SW1 TXOUT Forward SW3 TXOUT Left turn
S1
R3
1K
SW2 Backward
300 R5
LED LED1
S2
R4
1K
SW4 Right turn
100u C0 S1
1N4148 D1
1N4148 D2
Input Protection
S2
LED control circuit
SW5 SW6 F1 F2 CKSEL0 U1 1 2 3 4 CKSEL1 5 6 7 VDD C18 10u L1 39nH ANTENNA L2 1uH Dependent on Antenna C13 47n C7 240p JP3 1 2 Power In BT1 BAT ID0 VDD + 8 S3 S4 CKSEL0 TEST CKSEL1 ANT VSS VDD S2 S1 TXOUT ID0 ID1 X2 X1 RESET W55RFS27T3B 16 15 14 13 12 11 10 9 R1 20K 49.86MHz Overtone Crystal S2 S1 TXOUT ID0 ID1 C8 7p
C19 47n
VDD JP6 1 2 3
VDD ID0
JP7 1 2 3 ID1
VDD ID1
L7 1uH
C9 7p
C33 47n
* 27MHz,(L1,C7)= (56nH, 470pF), (L7,C33)=none * 35MHz,(L1,C7)= (47nH, 360pF), (L7,C33)=(3.3uH,47n) * 40MHz,(L1,C7)= (47nH, 300pF), (L7,C33)=(2.2uH,47n) * 49MHz,(L1,C7)= (39nH, 240pF), (L7,C33)=(1uH,47n)
CKSEL1 CKSEL0
VDD
Title Size A Date:
W55RFS27T3B Application Circuit (49MHz) Document Number {Doc} Tuesday, July 06, 2004 Sheet 1 of 1 Rev {RevCode}
For 49MHZ
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Publication Release Date:May 24, 2005 Revision A3
W55RFS27T1B
W55RFS27T1B Application Schematic BOM(6-function):
Item Qty Reference Part ________________________________________________________________________________ 1 1 C7 240p 2 2 C8,C9 7p 3 3 C13,C19,C33 47n 4 1 C18 10u 5 1 L1 39nH 6 2 L2,L7 1uH 7 1 R1 20K 8 1 U1 W55RFS27T1B 9 1 Y1 49.86MHz 10 1 LED1 LED (Optional) 11 1 C0 100u (Optional) 12 2 D2,D1 1N4148 (Optional) 13 1 R5 300 (Optional) 14 2 R4,R3 1K (Optional)
4.1.3 Application Circuit for 4 Control Functions
Set TEST = 1. 1. Only 4 functions are provided. 2. The external power switch is not required when using a 9-V battery. 3. LEDs can be directly driven by TXOUT.
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W55RFS27T1B
SW3 SW4
Left-turn Right-Turn
D4 1N4148
D3 1N4148 1 2
U1 S3 S4 CKSEL0 TEST CKSEL1 ANT VSS VDD S2 S1 TXOUT ID0 ID1 X2 X1 RESET W55RFS27T1B 16 15 14 13 12 11 10 9
D2 1N4148
D1 1N4148
SW2 SW1
Backward Forward
TXOUT 300 R5 LED LED1
CKSEL0
3 4
TXOUT ID0 ID1 C8 7p
CKSEL1
5 6 7 VDD
VDD
8
R1 20K
49.86MHz Overtone Crystal
L1 39nH ANTENNA L2 1uH Dependent on Antenna C13 47n
C7 240p JP6 1 2 3 ID0 ID0 ID1 VDD JP7 1 2 3 ID1 VDD
L7 1uH
C9 7p
C33 47n
R5 120 VDD BT1 9V D3 4.3V C18 470u + C19 47n
* 27MHz,(L1,C7)= (56nH, 470pF), (L7,C33)=none * 35MHz,(L1,C7)= (47nH, 360pF), (L7,C33)=(3.3uH,47n) * 40MHz,(L1,C7)= (47nH, 300pF), (L7,C33)=(2.2uH,47n) * 49MHz,(L1,C7)= (39nH, 240pF), (L7,C33)=(1uH,47n)
CKSEL1 CKSEL0
VDD
Title Size A Date:
W55RFS27T1B Application Circuit (49MHz) Document Number {Doc} Tuesday, May 04, 2004 Sheet 1 of 1 Rev {RevCode}
For 49MHZ
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Publication Release Date:May 24, 2005 Revision A3
W55RFS27T1B
4.1.4 Application Circuit for FCC
SW3 SW4
Left-turn Right-Turn
U1 1 2 3 4 5 6 VDD VDD 7 8 S3 S4 CKSEL0 TEST CKSEL1 ANT VSS VDD S2 S1 TXOUT ID0 ID1 X2 X1 RESET W55RFS27T1B 16 15 14 13 12 11 10 9 TXOUT
SW2 SW1
Backward Forward
TXOUT 300 R5 LED LED1
27.145MHz Fundamental Crystal
ANTENNA
L1 270nH
C8 100p
L2 5.6uH Dependent on Antenna L3 2.2uH C6 15p C7
C13 100p
BT1 2.2~5.5V
C18 100u
+
C19 47n
L4 2.2uH
100p
Title W55RFS27T1B Application Circuit For FCC(27MHz) Size A Date: Document Number {Doc} Wednesday, July 14, 2004 Sheet 1 of 1 Rev {RevCode}
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W55RFS27T1B
4.2 uC-Mode Control Signal
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Publication Release Date:May 24, 2005 Revision A3
W55RFS27T1B
4.3 W55RFS27T Family FCC Certification
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W55RFS27T1B
5. REVISION HISTORY
VERSION DATE PAGE DESCRIPTION
A1 A2 A3
2004/5/27 2004/715 2005/5/10
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Preliminary version Released version A2 Revised by Brand AND ADD IMPORTANT INTOCE
Important Notice
Winbond products are not designed, intended, authorized or warranted for use as components in systems or equipment intended for surgical implantation, atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, or for other applications intended to support or sustain life. Further more, Winbond products are not intended for applications wherein failure of Winbond products could result or lead to a situation wherein personal injury, death or severe property or environmental damage could occur. Winbond customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Winbond for any damages resulting from such improper use or sales.
Headquarters
No. 4, Creation Rd. III, Science-Based Industrial Park, Hsinchu, Taiwan TEL: 886-3-5770066 FAX: 886-3-5665577 http://www.winbond.com.tw/
Winbond Electronics Corporation America
2727 North First Street, San Jose, CA 95134, U.S.A. TEL: 1-408-9436666 FAX: 1-408-5441798
Winbond Electronics (Shanghai) Ltd.
27F, 2299 Yan An W. Rd. Shanghai, 200336 China TEL: 86-21-62365999 FAX: 86-21-62365998
Taipei Office
9F, No.480, Rueiguang Rd., Neihu Chiu, Taipei, 114, Taiwan, R.O.C. TEL: 886-2-8177-7168 FAX: 886-2-8751-3579
Winbond Electronics Corporation Japan
7F Daini-ueno BLDG, 3-7-18 Shinyokohama Kohoku-ku, Yokohama, 222-0033 TEL: 81-45-4781881 FAX: 81-45-4781800
Winbond Electronics (H.K.) Ltd.
Unit 9-15, 22F, Millennium City, No. 378 Kwun Tong Rd., Kowloon, Hong Kong TEL: 852-27513100 FAX: 852-27552064
Please note that all data and specifications are subject to change without notice. All the trade marks of products and companies mentioned in this data sheet belong to their respective owners.
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Publication Release Date:May 24, 2005 Revision A3

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