CXA1742Q
Pin voltage
DC
I/O
Pin No. Symbol
Equivalent circuit
Description
AC resistance
18
AGCPS 0.233 V
Connects an AGC
33
18
integrating capacitor.
VREF
34
15
19
20
XTALOUT
Connect a crystal oscillator
to form a Colpitts-type
oscillator circuit.
24
19
10k
147
15p
10k
20
When
an
external
oscillator is used, its signal
must be connected to Pin
20.
XTALIN 2.96 V
25
21
21
22
GND
IFIN
0 V
Ground.
1.25 V
RF amplifier input. The
relationship between IFIN
(Pin 22) and IFPS (Pin 23)
is designed so that the IC
internal stray capacitance
is small.
24
23
22
21
23
IFPS
1.25 V
1.5k
1.5k
Therefore, if Pins 22 and
23 are used for balance
input, the common-mode
rejection deteriorates.
VREF
25
24
25
VCC
3.0 V
0 V
Power supply.
Supplies current to the RF
AMP, MIXER, OSC, and
1/2 DIVIDER circuits.
Ground.
GND
—6—
SONY [ SONY CORPORATION ]
