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E95925B8Y

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any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the

operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.

Absolute Maximum Ratings (Ta=25 °C)

• Supply voltage

14

V

• Operating temperature

Topr

–20 to +75

°C

• Storage temperature

Tstg

–65 to +150

°C

• Allowable power dissipation

400

mW

Operating Conditions

Supply voltage

1.8 to 4.5

V

Description

The CXA1991N is a tuner IC designed for use in

FM pagers and FM multiplex broadcasting. A

receiver system can be configured by using the

digital data output, in combination with a decoder. It

has a battery save function and ultra-low power

consumption.

Features

• Ultra-low power consumption

• LED drive circuit for tuning

• Battery save function

• Few external parts

Applications

• Tuners for FM multiplex broadcasting

• FM pagers

FM Pager/FM Multiplex Tuner

20 pin SSOP (Plastic)

Block Diagram

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

12

11

AM FRONT END

FM FRONT END

13

REG

METER

BATTERY

SAVE CONT

FM IF DET

AM IF, IF DET

AGC

AGC BUFF

CXA1991N

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