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PIN DESCRIPTION

Pin 1

RF IN

The receiver antenna connects to this input.It is AC-coupled and has nominal RF

impedance of 50

Ω.

Pin 2 & 4

GROUND

This pin should be connected to a common groundplane.

Pin 3

DETECT

This pin may be used as described in this manual to derive an indication of when

a signal is being received. In combination with simple external circuits the pin is

useful for qualifying data and implementing power-save functions . If the detect

function is not being used, a 10 K

Ω pull up to pin 5 (Vcc) should be connected.

Pin 5

Vcc

Positive supply of 4 to 9 volts. The supply must be clean (<20 mV pp) stable and

free of high-frequency digital noise. A supply filter is recommended unless the

module is driven from its own regulated supply or battery.

Pin 6

AF (ANALOG OUTPUT)

This is the FM demodulator output. It has a standing DC bias of approximately 2

volts and may be used to recover analog signals such as audio or tones. Load

impedance as low as 2 K

Ω and up to 100 pF can be driven.

Pin 7

DATA (DIGITAL OUTPUT)

This digital output from the internal data slicer is a squared version of the signal

on pin 6 (AF). This signal is used to interface with external digital decoders, or

logic devices such as a microprocessor. The output recreates the digital input to

the transmitter. Load impedance as low as 1 K

Ω and up to 1 nF can be driven.

PHYSICAL PACKAGING

The receiver is packaged as a hybrid SIP module with five pins spaced 0.100 in.

on center.The SIP package allows easy accommodation of both horizontal and

vertical mounting requirements into a highly compact package. Its leaded design

allows for easy prototyping and simple integration into through-hole and surface-

mount designs. If the module will be bent and laid flush on the circuit board, it is

suggested that a pad of silicon or other adhesive be used to hold it in place.

figure 2: mechanical dimensions