QwikRadio

tm

13

July 1999

MICRF002

MICRF002

Micrel

MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA

TEL

This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights

of third parties resulting from its use.

No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.

This is preliminary

information and a final specification has not been completed. Before making any final design determination, consult with Micrel for final specifications.

©1998 Micrel Incorporated

Typical Application

Figure 7 below illustrates a typical application for the MICRF002 UHF Receiver IC. Operation in this example is at 385.5MHz,

and may be customized by selection of the appropriate reference frequency (CR1), and adjustment of the antenna length.

The value of C4 would also change, if the optional input filter is used. Changes from the 1kbps data rate may require a

change in the value of R1. The Bill of Materials is shown in the accompanying chart.

Bill of Materials

Item

Part Number

Manufacturer

Description

U1

MICRF002

Micrel

UHF Receiver

U2

HT-12D

Holtek

Logic decoder

CR1

CSA6.00MG

Murata

6.00MHz Cer. Res.

D1

SSF-LX100LID

Lumex

Red LED

R1

Bourns

68k, 1/4W ,5%

R2

Bourns

1k,1/4W, 5%

C1

Panasonic

4.7µF, Dip Tant. Cap

C3

Panasonic

0.47µF, Dip Tant. Cap

C2

Panasonic

2.2µF, Dip Tant. Cap

C4

Panasonic

8.2pF, COG Cer. Cap

Vendor

Telephone

Fax

Bourns

(909) 781-5500

(909) 781-5273

Holtek

(408) 894-9046

(408) 894-0838

Lumex

(800) 278-5666

(847) 359-8904

Murata

(800) 241-6574

(770) 436-3030

Panasonic

(201) 348-7000

(201) 348-8164

Figure 7

385.5MHz, 1kbps OOK Receiver/Decoder

SWP Mode, Continuous Operation

6-Bit Address Decode/2 OP Codes