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Issue 0

ML13135

FM Communications

Receiver; Dual Conversion

Narrowband FM Receiver

Legacy Device: Motorola MC13135

The ML13135 is the second generation of single chip, dual conversion

FM communications receivers developed by Motorola. Major

improvements in signal handling, RSSI and first oscillator operation

have been made. In addition, recovered audio distortion and audio

drive have improved. These receivers offer low noise, high gain and

stability over a wide operating voltage range, and Lansdale is pleased

to continue to offer them.

The ML13135 includes a Colpitts oscillator, VCO tuning diode, low

noise first and second mixer and LO, high gain limiting IF, and RSSI.

The ML13135 is designed for use with an LC quadrature detector and

has an uncommitted op amp that can be used either for an RSSI buffer

or as a data comparator.

This device can be used as a stand–alone VHF receiver or as the

lower IF of a triple conversion system. Applications include cordless

telephones, short range data links, walkie–talkies, low cost land

mobile, amateur radio receivers, baby monitors and scanners.

OPERATING FEATURES

• Complete Dual Conversion FM Receiver – Antenna to Audio Output

• Input Frequency Range – 200 MHz

• Voltage Buffered RSSI with 70 dB of Usable Range

• Low Voltage Operation – 2.0 to 6.0 Vdc (2 Cell NiCad Supply)

• Low Current Drain – 3.5 mA Typ

• Low Impedance Audio Output < 25 Ω

• VHF Colpitts First LO for Crystal or VCO Operation

• Isolated Tuning Diode

• Buffered First LO Output to Drive CMOS PLL Synthesizer

• Operating Temperature Range TA = –40° to +85°C

P DIP 24 = LP

PLASTIC PACKAGE

CASE 724

SO 24 = -6P

CASE 751E

(SO–24L)

24

1

24

1

CROSS REFERENCE/ORDERING INFORMATION

MOTOROLA

P DIP 24

MC13135P

ML13135LP

SO 24

MC13135DW

ML13135-6P

LANSDALE

PACKAGE

Note: Lansdale lead free (Pb) product, as it

becomes available, will be identified by a part

number prefix change from

ML to MLE.

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

24

AF

VCC2

2nd LO

VCC1

1st LO

Varicap

Limiter

Demod

1st LO Base

1st LO Emitter

1st LO Out

VCC1

2nd LO Emitter

2nd LO Base

2nd Mixer Out

VEE

Limiter In

Decouple 1

Decouple 2

RSSI

Varicap C

Varicap A

1st Mixer In 1

1st Mixer In 2

1st Mixer Out

VCC2

2nd Mixer In

Audio Out

Op Amp Out

Op Amp In –

Op Amp In +

Quad Coil

PIN CONNECTIONS

The device contains 142 active transistors.