lc72134m Sanyo Semiconductor Corporation, lc72134m Datasheet - Page 6

• Manufacturer Part Number: lc72134m
• Description: Dual Pll Frequency Synthesizer For Fm Tuner Systems
• Manufacturer: Sanyo Semiconductor Corporation

Continued from preceding page.
AOUTa
AMIN
AINa
BO1
BO2
BO3
BO4
PDa
V
V
IO2
DO
Pin
CE
CL
DI
DD
SS
Pin No.
17
19
23
14
16
20
21
22
2
3
4
5
6
7
8
Main PLL
local oscillator
signal input
Chip enable
Input data
Clock
Output data
Power supply
Ground
Output ports
I/O port
Main PLL
charge pump
output
Main PLL low-
pass filter
amplifier
transistor
Type
• AMIN is selected when DVS in the serial data is set to 0.
• When SNS in the serial data is set to 1:
• When SNS in the serial data is set to 0:
• This pin must be set high to enable serial data input (DI) or serial data output
• Input for serial data transferred from the controller
• Clock used for data synchronization for serial data input (DI) and serial data
• Output for serial data transmitted to the controller. The content of the data
• LC72134M power supply (V
• The power on reset circuit operates when power is first applied.
• LC72134M ground
• Output-only ports
• The output state is determined by BO1 through BO4 in the serial data.
• A time base signal (8 Hz) is output from BO1 when TBC in the serial data is set to
• Shared function I/O port
• The pin function is determined by IOC2 in the serial data.
• When specified to function as an input port:
• When specified to function as an output port:
• This pin is set to input mode after a power on reset.
• PLL charge pump output
• Connections for the n-channel MOS transistor to be used for the PLL active low-
• Input frequency: 2 to 40 MHz
• The signal is input to the swallow counter directly.
• The divisor can be set to a value in the range 272 to 65535. The set value
• Input frequency: 0.5 to 10 MHz
• The signal is input to a 12-bit programmable divider directly.
• The divisor can be set to a value in the range 5 to 4095. The set value becomes
(DO).
output (DO).
transmitted is determined by DOC0 through DOC2.
When the data value is 0: The output state will be the open circuit state.
When the data value is 1: The output state will be a low level.
1.
When the data value = 0: Input port
When the data value = 1: Output port
The input pin state is reported to the controller through the DO pin.
When the input state is low: The data will be 0:
When the input state is high: The data will be 1:
The output state is determined by IO2 in the serial data.
When the data value is 0: The output state will be the open circuit state.
When the data value is 1: The output state will be a low level.
A high level is output when the frequency of the local oscillator signal divided by N
is higher than the reference frequency, and a low level is output when that
frequency is lower. This pin goes to the high-impedance state when the
frequencies match.
pass filter.
becomes the actual divisor.
the actual divisor.
DD
LC72134M
= 4.5 to 5.5 V)
Function
Continued on next page.
Equivalent circuit
——
——
No. 5814-6/27