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SX1240

Low Cost Integrated Transmitter IC 434 MHz and 868 MHz Band RF Transmitter

Semtech Corporation 

ADVANCED COMMUNICATIONS & SENSING

SX1240

Integrated Transmitter IC

DATASHEET

5.4. Reference Design BOM

The following tables summarize the module BoM for 434 MHz and 868 MHz band operation.

Table 10 434 MHz Single Layer Reference Design BoM

Designator

U1

Q1

C1

C2

C3

C4

C5

C6

C7

C8

L1

L2

L3

Q2

C11

LM

R1

R2

R3

R4

R VBAT

R6

Part

Number

Package

Value Qty

Description

SX1240ISRT

SO8

-

HC49

-

0402

-

0402

-

0402

-

0402

-

0402

-

0402

-

0402

-

0402

LQG15

0402

LQG15

0402

LQG15

0402

-

2.5 x 3.2 mm

-

0402

-

0402

-

0402

-

0402

-

0402

-

0402

-

0402

-

0402

SX1240

26 MHz

NC

3.3 pF

S/C

8.2 pF

100 pF

100 nF

1 pF

8.2 pF

120 nH

22 nH

15 nH

26 MHz

TBC

TBC

0R0

0R0

0R0

0R0

0R0

0R0

1 RF Transmitter IC

1 Crystal 26 MHz CL = 15 pF

0 Capacitor NPO (+/-5%)

1 Capacitor NPO (+/-0.25 pF)

0

-

1 Capacitor NPO (+/-5%)

1 Capacitor NPO (+/-5%)

1 Capacitor X7R (+/-10%)

1 Capacitor NPO (+/-0.25 pF)

1 Capacitor NPO (+/-5%)

1 Multilayer chip inductor

1 Multilayer chip inductor

1 Multilayer chip inductor

- Optional replacement of Q1

- Antenna Matching Component

- Antenna Matching Component

- Optional PA Supply Isolation

- Optional CTRL ‘hi’ Connection

- Optional CTRL ‘lo’ Connection

- Optional CTRL Isolation

- Optional Supply Isolation

- Optional Data Connection to header

Manufacturer

Semtech

-

-

-

-

-

-

-

-

-

Murata or equivalent

Murata or equivalent

Murata or equivalent

-

-

-

-

-

-

-

-

-

Table 11 868 MHz Reference Design BoM

To be Confirmed

SX1240, Rev 1, Oct 2010

©2010 Semtech Corp.

Page 16

www.semtech.com

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