Silicon Labs

TABLE OF CONTENTS

1

Design Check List..........................................................................................................................................5

2

BLE121LR Product numbering......................................................................................................................6

3

Pinout and Terminal Description ...................................................................................................................7

3.1

I/O Ports .............................................................................................................................................. 10

3.1.1

I/O Configurations ........................................................................................................................ 10

3.1.2

Reserved I/O’s ............................................................................................................................. 10

3.2

UART................................................................................................................................................... 10

4

Electrical Characteristics ............................................................................................................................ 11

4.1

Absolute Maximum Ratings ................................................................................................................ 11

4.2

Recommended Operating Conditions ................................................................................................. 11

4.3

DC Characteristics .............................................................................................................................. 11

4.4

Current Consumption .......................................................................................................................... 12

4.4.1

Current Consumption When Using TPS62730 DCDC Converter................................................ 13

4.5

RF Characteristics............................................................................................................................... 13

4.6

Range of BLE121LR ........................................................................................................................... 17

5

Physical Dimensions .................................................................................................................................. 19

6

Power-On Reset and Brownout Detector ................................................................................................... 21

7

Design Guidelines ...................................................................................................................................... 22

7.1

General Design Guidelines ................................................................................................................. 22

7.2

Layout Guide Lines ............................................................................................................................. 22

7.3

BLE121LR-A Layout Guide ................................................................................................................. 23

8

Soldering Recommendations ..................................................................................................................... 25

9

Block diagram............................................................................................................................................. 26

10

Package .................................................................................................................................................. 29

11

Certifications ........................................................................................................................................... 30

11.1

Bluetooth ...................................................................................................................................... 30

11.2

FCC and IC .................................................................................................................................. 30

11.2.1

FCC et IC ..................................................................................................................................... 31

11.3

CE ................................................................................................................................................ 32

11.4

MIC Japan.................................................................................................................................... 33

11.5

Anatel (Brazil)............................................................................................................................... 33

11.6

KCC (Korea)................................................................................................................................. 33

12

Tape and reel information ....................................................................................................................... 33

13

Reel appearance and dimensions .......................................................................................................... 34