lc72135m Sanyo Semiconductor Corporation, lc72135m Datasheet - Page 7

• Manufacturer Part Number: lc72135m
• Description: Pll Frequency Synthesizer For Electronic Tuning
• Manufacturer: Sanyo Semiconductor Corporation

Continued from preceding page.
V
BO1
BO2
BO3
BO4
IO2
PD
AIN
AOUT
SS
Symbol
Pin No.
19
12
16
17
18
6
7
8
9
Ground
Output port
I/O port
Charge pump
output
LPF amplifier
transistor
Type
• The LC72135M ground
• Dedicated output pins
• The output states are determined by BO1 to BO4 bits in
• All output ports are set to the open state following a
• A time base signal (8 Hz) can be output from the BO1
• Care is required when using the BO1 pin, since it has a
• I/O dual-use pins
• The direction (input or output) is determined by bit IOC2
• When specified for use as input ports:
• When specified for use as output ports:
• The pin function as input pin following a power-on reset.
• PLL charge pump output
• The n-channel MOS transistor used for the PLL active
the serial data.
Data: 0 = open, 1 = low
power-on reset.
pin. (When the serial data TBC bit is set to 1.)
higher on impedance that the other output ports (pins
BO2 to BO4).
in the serial data.
Data: 0 = input port, 1 = output port
The state of the input pin is transmitted to the controller
over the DO pin.
Input state: low = 0 data value
The output states are determined by the IO2 bit in the
serial data.
Data: 0 = open, 1 = low
When the frequency generated by dividing the local
oscillator frequency by N is higher than the reference
frequency, a high level is output from the PD pin.
Similarly, when that frequency is lower, a low level is
output. The PD pin goes to the high-impedance state
when the frequencies match.
low-pass filter.
LC72135M
high = 1 data value
Functions
Circuit configuration
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