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Sony Semiconductor Electronic Components Datasheet

CXA1991N Datasheet

FM Pager/FM Multiplex Tuner

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CXA1991N pdf
CXA1991N
FM Pager/FM Multiplex Tuner
For the availability of this product, please contact the sales office.
Description
The CXA1991N is a tuner IC designed for use in
20 pin SSOP (Plastic)
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
(ID = 1.2 mA for FM; ID = 0.8 mA for AM; VCC = 3 V)
LED drive circuit for tuning
Battery save function
Few external parts
Applications
Tuners for FM multiplex broadcasting
FM pagers
Absolute Maximum Ratings (Ta=25 °C)
Supply voltage
VCC 14
V
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –65 to +150 °C
Allowable power dissipation
PD 400 mW
Operating Conditions
Supply voltage
VCC
1.8 to 4.5
V
Block Diagram
20 19 18 17 16 15 14 13 12 11
FM FRONT END
REG
METER
AM FRONT END
AGC BUFF
AM IF, IF DET
AGC
FM IF DET
BATTERY
SAVE CONT
1 2 3 4 5 6 7 8 9 10
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
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.
—1—
E95925B8Y


Sony Semiconductor Electronic Components Datasheet

CXA1991N Datasheet

FM Pager/FM Multiplex Tuner

No Preview Available !

CXA1991N pdf
Pin Description
Pin
Symbol
No.
Pin voltage (V)
FM AM
Equivalent circuit
CXA1991N
(VCC=3 V, Ta=25 °C)
Description
1 AM IF IN 1.1 1.1
1
220k
AM IF input pin.
2 AGC
0.3 0.4
2
130 100k
130 Connected to a capacitor.
9
9 DET OUT 0.9 0.7
Detection output pin.
3 FM IF IN 1.1 0
4 BAND
1.1 0
5 GND2
00
6 DISCRI
2.0 2.4
VCC
330
3
VCC
4
VCC
6
2k
1.1k
FM IF input pin.
AM/FM band switching pin.
AM when grounded, FM when
open.
IF system ground.
Connected to phase shift circuit
and ceramic discriminator.
7 VCC
3.0 3.0
—2—


Part Number CXA1991N
Description FM Pager/FM Multiplex Tuner
Maker Sony Corporation
Total Page 12 Pages
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CXA1991N pdf
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