ML3371, ML3372
LANSDALE Semiconductor, Inc.
DC ELECTRICAL CHARACTERISTICS
(VCC = 4.0 Vdc, TA = 25°C, unless otherwise noted)
Characteristic
Drain Current (No Input Signal)
Squelch Off, Vsq = 2.0 Vdc
Squelch On, Vsq = 0 Vdc
Squelch Off, VCC = 2.0 to 9.0 V
Detector Output (No Input Signal)
DC Voltage, V8 = VCC
Filter Output (No Input Signal)
DC Voltage
Voltage Change, VCC = 2.0 to 9.0 V
Trigger Hysteresis
Pin
4
lcc1
lcc2
dlcc1
9
11
V11
dV11
–
Hys
1.5
2.0
34
2.5
5.0
57
3.5
8.0
80
mV
V9
0.9
1.6
2.3
Vdc
–
–
–
3.2
3.6
1.0
4.2
4.8
2.0
Vdc
Symbol
Min
Typ
Max
Unit
mA
Figure 1. ML3371 Functional Block Diagram and Test Fixture Schematic
RF Input
RSSI Output
VCC = 4.0 Vdc
51 k
C1
0.01
51
1.0
µF
Mute
510 k
0.1
SqIn
FilterOut
FilterIn
1.0
µF
470
0.01
8.2 k
10
9
AF
Amp
AF Out
to Audio
Power Amp
16
15
14
13
12
11
Filter –
Amp
+
Squelch Trigger
with Hysteresis
Demodulator
Mixer
10
Limiter
Amp
51 k
Oscillator
1
15
Quad Coil TOKO
2A6597 HK (10 mm)
or
7MC–8128Z (7 mm)
2
3
4
5
1.8 k
6
7
8
53 k
57.6575
MHz
22
0.1
0.33
0.001
muRata
CFU455D2
or
equivalent
0.1
20 k
0.1
Page 3 of 19
www.lansdale.com
Issue A
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