Pin
No.
Symbol
Voltage
DC
AC
10 HD
4.0V
—
0.4V
CXA1203M/N
Equivalent circuit
VCC
20k
(×2)
PR
10
1k
(×2)
(Sub)
Description
Output pin of the HD pulse
produced in the AFC (fH-PLL).
11 C Sync
2.0V
PR
11
20k
46k
20k
Input pin of the composite
sync signal.
The internal threshold voltage
is 2.0V and the polarity is
active HIGH.
12 GND
—
—
13 VREG 4.2V
—
VCC
13
—
GND pin
(×32)
23p
Connected to
about 30
elements
Output pin of the regulated
voltage source in the IC
(4.2V).
14 IREF
2.1V
—
8k
VCC
PR
14
(×2)
IREF
10k
40k
(Sub)
4k
Connecting pin of the
standard resistance to
produce the reference
current source in the IC.
–5–