PT4455

V1.1

2

January 2013

APPLICATION CIRCUIT

XOUT

1

VSS

2

PAOUT

3

DIN

4

VDD

5

XIN

6

PT4455

X1

R2

R1

DIN

VDD

C5

C4

L2

L1

C3

C6

C1

C2

R3

R4

C7

R5

BILL OF MATERIALS

Part

Value

Unit

315MHz

433.92MHz

X1

9.844M

13.56M

Hz

R1

10K

10K

Ω

R2

100K

100K

Ω

R3

0

0

Ω

R4

0

0

Ω

R5

560K

560K

Ω

C1

22p

18p

F

C2

22p

18p

F

C3

1μ

1μ

F

C4

220p

220p

F

C5

8.2p

4.7p

F

C6

18p

10p

F

C7

2.2μ

2.2μ

F

L1

180n

180n

H

L2

33n

27n

H

Notes:

1. C1/C2 can be used to trim the transmitted signal frequency for matching the specified value.

2. L2/C5/C6 value will depend on PCB layout.

3. The recommend maximum ESR value of X1 is 40

Ω.

4. To populate the R5 over XIN will help to maintain good oscillation in high X1 ESR.