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the wireless IC company

RX3930 Low Power ISM-band FM/FSK Receiver IC

Advance Information

HiMARK Technology, Inc. reserves the right to change the product described in this datasheet. All information con-

tained in this datasheet is subject to change without prior notice. HiMARK Technology, Inc. assumes no responsibility

for the use of any circuits shown in this datasheet.

Description

The RX3930 is a low power 433/868/915 MHz FM/FSK receiver IC which is suitable for

use in the North American 915 MHz and the European 433 and 868 MHz ISM bands.

Features

!

Integrated VCO with fixed 梅 64 prescaler, phase/frequency detector, and reference

oscillator forming complete phase-locked loop

!

User selectable FM or FSK output

!

RSSI output with 70 dB dynamic range

!

Receiver enable pin for power saving

!

TQFP-32 package (5mm x 5mm)

Applications

!

Wireless mouse

!

Wireless amplifier/ speaker/ earphone/ microphone

!

Wireless car alarm system

Block Diagram

OSC

RXEN IN

OSC

OUT

DO

VSS4 VCC2 RES

RES

32

VCC1

1

RXIN

2

31

OSC

30

29

28

27

26

25

24

QUAD

23

IF2

VCO

PFD

梅 64

OUT

OUT

VSS1

3

LNA

OUT

4

VSS2

5

LNA

BIAS

COMPARATOR/

AUDIO AMP

22

FM

21

RSSI

20

MUTE

MIXER

MIX

6

IN

VSS3

7

MIX

8

OUT

IFAMP

RSSI

DEMOD

LIMITER

19

VCC3

18

IF2

DEC

17

IF2

DEC

9

IFIN

10

IFIN

11

IF1

DEC

12

IF1

DEC

13

14

15

16

IF1

VREF VSS5 IF2

OUT IF

IN

Page 1

May 2001

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