ML3371
ML3372
Low Power
Narrowband FM IF
Legacy Device: Motorola MC3371, MC3372
The ML3371 and ML3372 perform single conversion FM
reception and consist of an oscillator, mixer, limiting IF amplifi-
er, quadrature discriminator, active filter, squelch switch, and
meter drive circuitry. These devices are designed for use in FM
dual conversion communication equipment. The ML3371/ML3372
16
are similar to the Motorola MC3361/MC3357 FM IFs, except 1
that a signal strength indicator replaces the scan function control-
P DIP 16 = EP
ling driver which is in the MC3361/MC3357. The ML3371 is
PLASTIC PACKAGE
CASE 648
designed for the use of parallel LC components, while the
ML3372 is designed for use with either a 455 kHz ceramic dis-
criminator, or parallel LC components.
These devices also require fewer external parts than earlier
16
1
products. The ML3371 and ML3372 are available in dualinline
and surface mount packaging.
SO 16 = -5P
Wide Operating Supply Voltage Range: V = 2.0 to 9.0 V PLASTIC PACKAGE
CC
CASE 751B
Input Limiting Voltage Sensitivity of 3.0 dB
(SO16)
Low Drain Current: I = 3.2 mA, @ V = 4.0 V,
CC CC
CROSS REFERENCE/ORDERING INFORMATION
Squelch Off
PACKAGE MOTOROLA LANSDALE
Minimal Drain Current Increase When Squelched
P DIP 16 MC3371P ML3371EP
Signal Strength Indicator: 60 dB Dynamic Range
SO 16 MC3371D ML3371-5P
Mixer Operating Frequency Up to 100 MHz
P DIP 16 MC3372P ML3372EP
Fewer External Parts Required than Earlier Devices SO 16 MC3372D ML3372-5P
Operating Temperature Range T = 30 to +70C
A
Note: Lansdale lead free (Pb) product, as it
becomes available, will be identified by a part
MAXIMUM RATINGS
number prefix change from ML to MLE.
Rating Pin Symbol Value Unit
Power Supply Voltage 4 V (max) 10 Vdc
CC
RF Input Voltage (V 4.0 Vdc) 16 V16 1.0 Vrms
CC
Detector Input Voltage 8 V8 1.0 Vpp
Squelch Input Voltage 12 V12 6.0 Vdc
(V 4.0 Vdc)
CC
Mute Function 14 V 0.7 to 10 V
14 pk
Mute Sink Current 14 l14 50 mA
Junction Temperature T 150 C
J
Storage Temperature Range T 65 to +150 C
stg
NOTES: 1. Devices should not be operated at these values. The Recommended Operating
Conditions table provides conditions for actual device operation.
PIN CONNECTIONS
1 16 Mixer Input 1 16 Mixer Input
Crystal Osc
Crystal Osc
Gnd
2 15 2 15
Gnd
14 Mute
Mixer Output 3 3 14 Mute
Mixer Output
4 13 Meter Drive 4 13 Meter Drive
V V
CC ML3372
CC ML3371
(Top View)
(Top View)
5 12 12
Limiter Input Squelch Input Limiter Input 5 Squelch Input
6 11 Filter Output
Decoupling 6 11 Filter Output
Decoupling
7 10 Filter Input 10
Limiter Output 7 Filter Input
8 9 Recovered Audio 8 9 Recovered Audio
Quad Coil Quad Input
Page 1 of 19 www.lansdale.com Issue AML3371, ML3372 LANSDALE Semiconductor, Inc.
RECOMMENDED OPERATING CONDITIONS
Rating Pin Symbol Value Unit
Supply Voltage (@ T = 25C) 4 V 2.0 to 9.0 Vdc
A CC
( 30C T +75C) 2.4 to 9.0
A
RF Input Voltage 16 V 0.0005 to 10 mVrms
rf
RF Input Frequency 16 f 0.1 to 100 MHz
rf
Oscillator Input Voltage 1 V 80 to 400 mVrms
local
Intermediate Frequency f 455 kHz
if
Limiter Amp Input Voltage 5 V 0 to 400 mVrms
if
Filter Amp Input Voltage 10 V 0.1 to 300 mVrms
fa
Squelch Input Voltage 12 V 0 or 2 Vdc
sq
Mute Sink Current 14 l 0.1 to 30 mA
sq
Ambient Temperature Range T 30 to +70 C
A
AC ELECTRICAL CHARACTERISTICS (V = 4.0 Vdc, f = 58.1125 MHz, df = 3.0 kHz, f = 1.0 kHz, 50 source,
CC o mod
f = 57.6575 MHz, V = 0 dBm, T = 25C, unless otherwise noted)
local local A
Characteristic Pin Symbol Min Typ Max Unit
Input for 12 dB SINAD V Vrms
SIN
1.0
Matched Input (See Figures 11, 12 and 13)
5.0 15
Unmatched Input (See Figures 1 and 2)
Input for 20 dB NQS V 3.5 Vrms
NQS
Recovered Audio Output Voltage AF mVrms
O
V = 30 dBm 120 200 320
rf
Recovered Audio Drop Voltage Loss AF dB
loss
Vrf = 30 dBm, V = 4.0 V to 2.0 V 8.0 1.5
CC
Meter Drive Output Voltage (No Modulation) 13 M Vdc
Drv
V = 100 dBm MV1 0.3 0.5
rf
V = 70 dBm MV2 1.1 1.5 1.9
rf
V = 40 dBm MV3 2.0 2.5 3.1
rf
Filter Amp Gain A dB
V(Amp)
R = 600 , f = 10 kHz, V = 1.0 mVrms 47 50
s s fa
Mixer Conversion Gain A dB
V(Mix)
V = 40 dBm, R = 1.8 k 14 20
rf L
Signal to Noise Ratio s/n dB
V = 30 dBm 36 67
rf
Total Harmonic Distortion THD %
V = 30 dBm, BW = 400 Hz to 30 kHz 0.6 3.4
rf
Detector Output Impedance 9 Z 450
O
Detector Output Voltage (No Modulation) 9 DV Vdc
O
V = 30 dBm 1.45
rf
Meter Drive 13 M A/dB
O
V = 100 to 40 dBm 0.8
rf
Meter Drive Dynamic Range 13 MVD dB
RF 60
In
IF (455 kHz) 80
In
Mixer Third Order Input Intercept Point ITO dBm
Mix
f1 = 58.125 MHz
f2 = 58.1375 MHz 22
Mixer Input Resistance 16 R 3.3 k
in
Mixer Input Capacitance 16 C 2.2 pF
in
Page 2 of 19 www.lansdale.com Issue A