MRF372R3 MRF372R5

5

RF Device Data

Freescale Semiconductor

R4B

PCB Substrate (30 mil thick)

Motorola Vertical 860 MHz Balun

Rogers RO3010 (50 mil thick)

55 mil slot cut

out to accept Balun

Input

(50 ohm microstrip)

Output 2

(12.5 ohm microstrip)

Ground

Vertical Balun Mounting Detail

Note:

Trim Balun PCB so that a 35 mil "tab"

fits into the main PCB slot" resulting

in Balun solder pads being level with

the PCB substrate solder pads when

fully inserted.

Output 1

(12.5 ohm microstrip)

MRF372

Rev 1a

C9

R1A

C3A

R2A

C3B

L1B

R2B

R1B

C10B

C10A

C1

C2

C4A

C4B

R3A

C6

C11

C13

L4B

L4A

C8A

C14A

C15

R3B

C14B

C8B

L2B

L2A

L1A

C5A

L3B

C5B

C7A

C7B

C12A

R5A

R4A

C12B

R5B

Figure 3. 860 MHz Narrowband Component Layout

L3A

Freescale has begun the transition of marking Printed Circuit Boards (PCBs) with the Freescale

Semiconductor signature/logo. PCBs may have either Motorola or Freescale markings during the

transition period. These changes will have no impact on form, fit or function of the current product.