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Page 3 of 19

Issue A

LANSDALE Semiconductor, Inc.

ML3371, ML3372

Characteristic

Pin

Symbol

Min

Typ

Max

Unit

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

4

lcc1

lcc2

dlcc1

–

–

–

3.2

3.6

1.0

4.2

4.8

2.0

mA

Detector Output (No Input Signal)

DC Voltage, V8 = VCC

9

V9

0.9

1.6

2.3

Vdc

Filter Output (No Input Signal)

DC Voltage

Voltage Change, VCC = 2.0 to 9.0 V

11

V11

dV11

1.5

2.0

2.5

5.0

3.5

8.0

Vdc

Trigger Hysteresis

–

Hys

34

57

80

mV

Quad Coil TOKO

2A6597 HK (10 mm)

or

7MC–8128Z (7 mm)

15

22

0.33

0.001

57.6575

MHz

Oscillator

0.1

0.1

20 k

0.1

muRata

CFU455D2

or

equivalent

14

C1

0.01

51

51 k

RF Input

VCC = 4.0 Vdc

13

24

38

–

56

7

1

15

+

16

Mute

0.1

12

11

10

9

FilterOut

1.0

µF

Demodulator

AF

Amp

RSSI Output

510 k

SqIn

FilterIn

470

8.2 k

0.01

AF Out

to Audio

Power Amp

53 k

10

Limiter

Amp

Filter

Amp

Mixer

Squelch Trigger

with Hysteresis

Figure 1. ML3371 Functional Block Diagram and Test Fixture Schematic

1.8 k

51 k

1.0

µF