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What is FN561?

This electronic component, produced by the manufacturer "Intersil", performs the same function as "OBSOLETE PRODUCT NO RECOMMENDED REPLACEMENT".


FN561 Datasheet PDF - Intersil

Part Number FN561
Description OBSOLETE PRODUCT NO RECOMMENDED REPLACEMENT
Manufacturers Intersil 
Logo Intersil Logo 


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® DNatOa RSEhCeOeOBtMSOMLEENTDEEPDRROEDPULCATCEMENOTctober 2002
CA3089
FN0561.4
FM IF System
Description
Intersil CA3089 is a monolithic integrated circuit that pro-
vides all the functions of a comprehensive FM-IF system.
The block diagram shows the CA3089 features, which
include a three-stage FM-IF amplifier/limiter configuration
with level detectors for each stage, a doubly-balanced
quadrature FM detector and an audio amplifier that features
the optional use of a muting (squelch) circuit.
The advanced circuit design of the IF system includes desir-
able deluxe features such as delayed AGC for the RF tuner,
and AFC drive circuit, and an output signal to drive a tuning
meter and/or provide stereo switching logic. In addition, inter-
nal power supply regulators maintain a nearly constant cur-
rent drain over the voltage supply range of +8.5V to +16V.
The CA3089 is ideal for high-fidelity operation. Distortion in a
CA3089 FM-IF System is primarily a function of the phase
linearity characteristic of the outboard detector coil.
Part Number Information
PART
NUMBER
CA3089E
CA3089M1
(3089M)
TEMP. RANGE
(oC)
PACKAGE
-40 to 85 16 Ld PDIP
-40 to 85 20 Ld SOIC
PKG. NO.
E16.3
M20.3
Pinouts
CA3089
(PDIP)
TOP VIEW
IF IN 1
INPUT BYPASS 2
DC FB BYPASS 3
FRAME GND 4
MUTE CONTROL 5
AUDIO OUT 6
AFC OUT 7
IF OUT 8
16 NC
15 DELAYED AGC
14 SUBSTRATE (GND)
13 TUNING METER OUT
12 MUTE LOGIC
11 V+
10 REF BIAS
9 QUADRATURE INPUT
Features
. For FM IF Amplifier Applications in High-Fidelity,
Automotive, and Communications Receivers
• Includes: IF Amplifier, Quadrature Detector, AF
Preamplifier, and Specific Circuits for AGC, AFC, Muting
(Squelch), and Tuning Meter
• Exceptional Limiting Sensitivity
at -3dB Point. . . . . . . . . . . . . . . . . . . . . . . . . . . 12µV (Typ)
• Low Distortion:
(with Double-Tuned Coil) . . . . . . . . . . . . . . . . . 0.1% (Typ)
• Single-Coil Tuning Capability
• High Recovered Audio . . . . . . . . . . . . . . . . . . 400mV (Typ)
• Provides Specific Signal for Control of Interchannel Muting
(Squelch)
• Provides Specific Signal for Direct Drive of a Tuning Meter
• Provides Delayed AGC Voltage for RF Amplifier
• Provides a Specific Circuit for Flexible AFC
• Internal Supply-Voltage Regulators
CA3089
(SOIC)
TOP VIEW
GND 1
IF IN 2
INPUT BYPASS 3
DC FB BYPASS 4
FRAME GND 5
MUTE CONTROL 6
AUDIO OUT 7
AFC OUT 8
IF OUT 9
GND 10
20 GND
19 DELAYED AGC
18 GND
17 SUBSTRATE (GND)
16 TUNING METER OUT
15 MUTE LOGIC
14 V+
13 REF BIAS
12 QUADRATURE INPUT
11 NC
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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FN561 equivalent
Schematic Diagram
CA3089
IF AMPLIFIER
A
Q9
R6 R7
2K 2K
R10
2K
C11 C12 C13
1 11
B
R11
2K
C14
1
C
Q15
R18 R19
2K 2K
Q21
R23
Q22 R27
750
2K
R24
480
R25
1.5K
Q3 Q4 C1
1
IF
INPUT
1
2
INPUT
BYPASSING
C2
1
Q1 Q2
Q8 Q7
Q8A
Q7A
R13A
2K
Q10Q11
R12A
2K
Q12
Q6
R2
R13 R14
2.7K 360
R12
2.7K
30K
R3
360
C4
0.2
V+ V+
Q14 Q13
R16A
2K
Q14A
Q13A
Q16Q17
R15A
2K
Q18
C3 R16
0.2 2.7K
R17
360
R15
2.7K
V+
Q19
Q20
R20
2K
R28
750
R21
480
R22
1.5K
SEE
NEXT
PAGE
3
R1
30K
V+
R50
500
Q58
R51
5K
C5
2
C6
3
Q61
Q60
Q59
C7
3
Q64
Q63
Q62
Q74
C8
3
Q68
Q69
Q70
V+
R59 R60
150 300
Q75 Q77
Q84
Q76
R52 R53 R56
400 600 600
R61
4K
15
AGC FOR
RF AMPL.
NOTE: Pin numbers refer to 16 lead PDIP.
LEVEL DETECTOR AND METER CIRCUIT
13
TUNING
METER
5


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Part Details

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Featured Datasheets

Part NumberDescriptionMFRS
FN561The function is OBSOLETE PRODUCT NO RECOMMENDED REPLACEMENT. IntersilIntersil

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