DS069-8 Aug 07

©2007 Reg. No. 227 4001, England

Page 4

Component Side

1

3

38.1mm

18.3mm

2.54mm

7

11

15

Pin Dimensions :

0.25mm x 0.50mm

4mm

Component Side

1 2

45.72mm

16.5mm

2.54mm

14

18

Pin Dimensions :

0.25mm x 0.50mm

3mm

1mm

RRFQ1 Mechanical Details

RRFQ2 Mechanical Details

Pin Description

RSSI Output*

RRFQ1

RRFQ2

Pin Description

RF In (dBm)

RSSI (V)

1

16

+Vcc

-120

1.20

2, 7,11

2,15

GND

-110

1.32

3

1

Data In (Antenna)

-100

1.50

12

NC

-90

1.78

13

14

Received Signal Strength Output

-80

2.06

N/A

17

AF Output

-70

2.35

14

18

Data Out

-60

2.62

15

N/A

Power Down

-50

2.72

0V = Standby

-40

2.75

5V = Operating

RSSI Output

The RSSI provides a DC Voltage proportional to the peak value of the receive data signal. This output can be

used as an indicator for the received signal strength to use in wake-up circuits etc.

An RC circuit is normally used to provide the timing for the RSSI signal. The modules have a 10nF capacitor

internally connected to GND, therefore a pull down resistor (to GND) connected to the RSSI pin may be used to

generate a simple RC network time constant for the RSSI signal output.

Please note that the maximum output current is typically 950µA, the discharge current is lower than 2µA