2400 MHz Digital Spread Spectrum Transceiver

RF109

100646A

Conexant

7

1/19/00

Conexant Proprietary

Table 2. RF109 Pin Signal Description (2 of 2)

Pin

Signal

Type

Description

Miscellaneous

20

MODSET

—

Modulator Gain Setting. Transmit modulator gain can be adjusted by the resistor connected to the pin.

13

GMCRES

—

GMC resistor to set the cutoff frequency of the baseband filter.

19

MIXBPC

—

Mixer bias bypass capacitor.

32

33

SRQ-

SRQ+

—

Q channel DC offset cancellation servo capacitor connections.

34

35

SRI-

SRI+

—

I channel DC offset cancellation servo capacitor connections.

1, 12, 36, 37,

40, 41, 42,

48

NC

—

No Connect. It is recommended to connect these pins to ground.

Power Supply Terminals

6

VCC1

Supply

Positive supply terminal.

7

VCC2

Supply

Positive supply terminal.

25

VCC3

Supply

Positive supply terminal.

31

VCC4

Supply

Positive supply terminal.

44

VCC5

Supply

Positive supply terminal.

45

VCC6

Supply

Positive supply terminal.

14, 17, 30

GND

Supply

Power supply ground terminal.

Notes:

1. All digital signals are CMOS compatible.