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Sony Semiconductor Electronic Components Datasheet

CXA3179N Datasheet

IF Amplifier for M-ary FSK Pagers (AFC Supported)

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CXA3179N pdf
CXA3179N
IF Amplifier for M-ary FSK Pagers (AFC Supported)
Description
The CXA3179N is a low current consumption FM
IF amplifier which employs the newest bipolar
process. It is suitable for M-ary FSK pagers using
AFC.
24 pin SSOP (Plastic)
Features
Low current consumption : 1.1 mA
(typ. at VCC=1.4 V)
Low voltage operation : VCC=1.1 to 4.0 V
Small package 24-pin SSOP
Second mixer and oscillator
Needless of IF decoupling capacitor
Reference power supply for operational amplifier
and comparator
Bit rate filter with variable cut-off
AFC current output circuit
RSSI function
IF input, VCC standard
Maximum input frequency : 30 MHz
Absolute Maximum Ratings
Supply voltage
VCC
Operating temperature Topr
Storage temperature Tstg
Allowable power dissipation
PD
7.0
–20 to +75
–65 to +150
V
°C
°C
417 mW
Operating Condition
Supply voltage
VCC 1.1 to 4.0
V
Applications
M-ary FSK pagers
Double conversion pagers
Structure
Bipolar silicon monolithic IC
Block Diagram and Pin Configuration
24 23 22 21 20 19 18 17 16 15 14 13
GND
MIX
OSC
REG
LVA
AFC
IF_LIM
LEVEL
COMP
QUAD_DET
FILTER
RSSI
1 2 3 4 5 6 7 8 9 10 11 12
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—
E96Y06A8Z


Sony Semiconductor Electronic Components Datasheet

CXA3179N Datasheet

IF Amplifier for M-ary FSK Pagers (AFC Supported)

No Preview Available !

CXA3179N pdf
CXA3179N
Pin Description
Pin
Symbol
No.
Pin
voltage
1 OSC IN
1.4 V
2 OSC OUT 0.7 V
3 MIX OUT 1.3 V
4 VCC
5 IF IN
1.4 V
Equivalent circuit
VCC
15k 300
1
72 15k
2
1.5k
3
GND
VCC
GND
1.5k 20k 20k
VCC
1.5k
5
Description
Connects the external parts of crystal
oscillator circuit.
A capacitor and crystal oscillator are
connected to these pins and VCC.
Mixer output.
Connect a 455 kHz ceramic filter
between this pin and IF IN.
Power supply.
IF limiter amplifier input.
6 TH CONT
7 AFC
6
25k
72
7
GND
VCC Determines the level comparator
threshold value.
Threshold value can be adjusted by
inserting the resistor between Pin 6 and
VCC.
Normally, short to VCC.
GND
VCC
AFC current output.
8 QUAD
1.4 V
8
20p
GND
VCC
20k 22k
Connects the phase shifter of FM
detector circuit.
GND
—2—


Part Number CXA3179N
Description IF Amplifier for M-ary FSK Pagers (AFC Supported)
Maker Sony Corporation
Total Page 27 Pages
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