MC3361W.pdf

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MC3361BP
LINEAR INTEGRATED CIRCUIT
LOW VOLTAGE/POWER NARROW
BAND FM IF
DESCRIPTION
The UTC MC3361BP is designed for use in FM dual
conversion communication. It contains a complete narrow
band FM demodulation system operable to less than 2.5V
supply voltage. This low-power narrow-band FM IF system
provides the second converter, second IF, demodulator. Filter
Amp and squelch circuitry for communications and scanning
receivers.
SOP-16
FEATURES
*Low power consumption (4.0mA typ. at Vcc=4.0V)
*Excellent input sensitivity
(-3dB limiting, 2.0µVrms typ.)
*Minimum number of external components required.
*Operating Voltage:2.5~7.0V
DIP-16
APPLICATIONS
*Cordless phone (for home use)
*FM dual conversion communications equipment
PIN CONFIGURATION
OSC
OSC
MIXER
OUTPUT
Vcc
LIMITER
INPUT
DECOUPLING
DECOUPLING
QUADRATURE
INPUT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
RF
INPUT
GND
MUTE
SCAN
CONTROL
SQUELCH
INPUT
FILTER
OUTPUT
FILTER
INPUT
AUDIO
OUTPUT
SUM
1
QW-R108-010,A
MC3361BP
PARAMETER
LINEAR INTEGRATED CIRCUIT
SYMBOL
VALUE
UNIT
ABSOLUTE MAXIMUM RATINGS
(TA=25°C)
Max. Supply Voltage
Vcc(max)
10
V
Supply Voltage Range
Vcc
2.5 to 7.0
V
Detector Input voltage
V
I(DET)
1.0
Vp-p
RF Input Voltage (Vcc>=4.0V)
V
I(RF)
1.0
Vrms
Mute Function
V
MUTE
-0.5 ~ + 5.0
Vpeak
Operating Temperature
T
OPR
-20 to +70
°C
Storage Temperature
T
STG
-65 to +150
°C
Note: Absolute maximum ratings are those values beyond which permanent damage to the device may occur. These
are stress ratings only and functional operation of the device at or beyond them is not implied. Long exposure to these
conditions may affect device reliability.
ELECTRICAL CHARACTERISTICS
(Vcc=4.0V, fo=10.7MHz,∆f=+-3KHz,Ta=25
°C,
unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
Operating Current
Input Limiting voltage
Detector Output voltage
Detector Output Impedance
Audio Output Voltage
Filter Gain
Filter Output DC Voltage
Trigger Hysteresis of filter
Mute Switch-on Resistance
Mute Switch-off Resistance
Scan Control “Low” Output
Scan Control “High” Output
Mixer Conversion Gain
Icc
V
I(LIM)
V
O(DET)
Z
O(DET)
V
O
G
V
V
O(DC)
V
TH
R
ON(MUTE)
R
OFF(MUTE)
V
L(SCAN)
V
H(SCAN)
G
V(MIXER)
R
I(MIXER)
C
I(MIXER)
Squelch off (V12=2V)
Squelch on (V12=GND)
-3.0dB limiting
MIN
TYP
4.0
6.0
2.0
2.0
400
160
48
1.5
50
10
10
MAX
UNIT
mA
µV
Vdc
Ω
mVrms
dB
Vdc
mV
Ω
MΩ
Vdc
Vdc
dB
KΩ
pF
Vin=10mV
f=10KHz,Vin=5mV
100
40
Mute “ Low”
Mute “ High”
Mute off (V12=2V)
Mute on (V12=GND)
0.5
3.0
24
3.3
2.2
Mixer Input Resistance
Mixer Input Capacitance
SUM
QW-R108-010,A
2
MC3361BP
APPLICATION CIRCUIT
Vcc
10.245MHz
1
220p
68p
2
3
4
LINEAR INTEGRATED CIRCUIT
0.01µ
16
51K
15
14
13
SCAN
CONTROL
120K
51K
50K
12
11
10
0.1µF
8
9
8.2K 0.01µF
0.01µF
10K
102
470K
510Ω
0.1µF
6
68K
3.3µF
AUDIO
VOLUME
AUDIO
0.01µF OUT
SQUELCH
SENSITIVITY
Vcc
RF INPUT
MURATA
CFU 455D
455KHz
FILTER
MC3361BP
5
0.1µ
0.1µ
7
20K
750
1N4148
0.1µ
QUAD COIL
TOKO TYPE
RMC-2A6597HM
In the above typical application, the audio signal is recovered using a conventional quadrature FM detector. The
absence of an input signal is indicated by the presence of noise above the desired audio frequencies. This “noise
band: is monitored by an active filter and a detector. A squelch trigger circuit indicates the presence of noise (or a
tone) by an output which can be used to control scanning. At the same time, an internal switch is operated which can
be used to mute the audio.
SUM
3
QW-R108-010,A

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