Contents

1.

General Description ................................................................................................................ 1

2.

Features.................................................................................................................................... 1

3.

Applications ............................................................................................................................. 1

4.

Typical Application ................................................................................................................. 2

5.

Ordering Information............................................................................................................. 2

6.

Pin Configuration.................................................................................................................... 3

7.

8-Pin Options ........................................................................................................................... 3

8.

Pin Description ........................................................................................................................ 4

9.

Absolute Maximum Ratings (Note 1) ....................................................................................5

10. Operating Ratings (Note 2) ....................................................................................................5

11. Electrical Characteristics ....................................................................................................... 5

12. Functional Diagram ................................................................................................................ 7

13. Applications Information and Functional Description ........................................................8

13.1.

Design Steps.............................................................................................................. 8

13.1.1.

Step 1: Selecting the Operating Mode............................................................... 8

13.1.2.

Step 2: Selecting the Reference Oscillator ........................................................ 9

13.1.3.

13.1.4.

13.1.5.

Step 5: Selecting the Demod Filter Bandwidth ............................................... 12

14. Additional Applications Information ..................................................................................13

14.1.

Antenna Impedance Matching ................................................................................ 13

14.2.

Shutdown Function ................................................................................................. 15

14.3.

Power Supply Bypass Capacitors............................................................................ 16

14.4.

Increasing Selectivity with an Optional BandPass Filter ........................................ 16

14.5.

Data Squelching ...................................................................................................... 16

14.6.

Wake-Up Function .................................................................................................. 16

15. Applications Example ........................................................................................................... 18

15.1.

315MHz Receiver/Decoder Application ................................................................. 18

16. Package Information............................................................................................................. 19