W55RFS27T1B

Publication Release Date:May 24, 2005

- 11 -

Revision A3

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.

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W55RFS27T3B Application Circuit (49MHz)

A

11

Tuesday, July 06, 2004

Title

Size

Document Number

Rev

Date:

Sheet

of

VDD

VSPLY

VDD

VDD

VDD

VDD

VDD

Dependent on Antenna

LED control circuit

Overtone Crystal

Input Protection

For 49MHZ

* 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)

ID0

ID1

1N4148

D2

L2

1uH

JP7

ID1

1

2

3

300

R5

JP6

ID0

1

2

3

ANTENNA

R1

20K

C7

240p

SW1

Forward

1N4148

D1

C19

47n

SW2

Backward

L7

1uH

R4

1K

LED

LED1

+

C18

10u

C13 47n

100u

C0

SW3

Left turn

SW5

F1

L1

39nH

R3

1K

49.86MHz

C8 7p

C9

7p

C33

47n

SW6

F2

SW4

Right turn

U1

W55RFS27T3B

TXOUT

14

X2

11

CKSEL0

3

VDD

8

VSS

7

ANT

6

CKSEL1

5

RESET

9

S4

2

S3

1

S2

16

S1

15

ID1

12

ID0

13

TEST

4

X1

10

JP3

Power In

1

2

BT1

BAT

S1

S1

CKSEL0

TXOUT

ID1

S2

S2

ID0

TXOUT

TXOUT

CKSEL1

CKSEL0

CKSEL1

S2

S1