SX1242, Rev 1, November 2010

©2010 Semtech Corp.

SX1242

www.semtech.com

Page 10

Integrated Transmitter IC

ADVANCED COMMUNICATIONS & SENSING

DATASHEET

4.3. Reference Design PCB Layout

The SX1242 reference design PCB layout is illustrated below:

Figure 6. Reference Design PCB Layout

4.4. Reference Design BOM

The following table summarizes the reference design BOM:

Table 7

Reference Design BOM

RefDes

MPN

Package

Value

Qty Description

U1

SX1242ISETRT

SO8

SX1242

1 RF transmitter IC

Q1

-

HC49

26 MHz

1 Crystal 26 MHz CL=15 pF

C3

-

0402

100pF

1 Capacitor NPO (+/-5%)

C4

-

0402

12pF

1 Capacitor NPO (+/-5%)

C5

-

0402

100nF

1 Capacitor X7R (+/-5%)

C6

-

0402

100pF

1 Capacitor NPO (+/-5%)

C7

-

0402

4.7pF

1 Capacitor NPO (+/-0.25pF)

C8

-

0402

12pF

1 Capacitor NPO (+/-5%)

C9

-

0402

2.2pF

1 Capacitor NPO (+/-0.25pF)

C10

-

0402

100nF

1 Capacitor X7R (+/-5%)

C11

-

0402

1uF

1 Capacitor X5R (+/-5%)

C12

-

0402

Zero ohm

1 Resistor Zero Ohm

L1

LQG15- or equivalent

0402

120nH

1 Multilayer chip inductor (+/-5%)

L2

LQG15- or equivalent

0402

39nH

1 Multilayer chip inductor (+/-5%)

L3

LQG15- or equivalent

0402

22n

1 Multilayer chip inductor (+/-5%)