Pin
No.
Symbol
I/O
Equivalent circuit
CXA2550M/N
Description
16 RF I
I
147
16
15k
The RF amplifier output RFO is input
with its capacitance coupled.
20µ
17 RFTC
147
—
17
50µ
50µ
10µ
External time-constant pin for RF
level control.
147
18 AGCCONT I
18
50k
15µ
15µ
RF level control ON (limit level of
50%/30%)/OFF switching pin.
OFF for Vcc, 30% for open or Vc
7µ
and 50% for VEE.
19 LD_ON
I
147
19
50µ
APC amplifier ON/OFF switching
pin.
VREF
OFF for Vcc and ON for VEE.
20 VCC
20
VCC
Vcc pin.
–5–