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LC72137 データシート(PDF) 6 Page - Sanyo Semicon Device

部品番号 LC72137
部品情報  PLL Frequency Synthesizer
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メーカー  SANYO [Sanyo Semicon Device]
ホームページ  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LC72137 データシート(HTML) 6 Page - Sanyo Semicon Device

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No. 5743-6/22
LC72137, 72137M
Continued from preceding page.
Pin No.
Symbol
(MFP pin numbers
Type
Functions
Circuit configuration
are in parentheses.)
6 (5)
7 (6)
8 (7)
14 (13)
9 (8)
10 (9)
17 (16)
18 (17)
19 (18)
10 (9)
BO1
BO2
BO3
BO4
IO1
IO2
PD
AIN
AOUT
NC
Output ports
Input or output
ports
Charge pump
output
LPF amplifier
transistor
connections
IF counter
• Dedicated outputs
• The output states are determined by the BO1 to BO4
bits in the serial data.
Data: 0 = open, 1= low
• A time base signal (8 Hz) can be output from the BO1
pin. (When the serial data TBC bit is set to 1.)
• I/O dual-use pins
• The direction (input or output) is determined by bits IOC1
and IOC2 in the serial data.
Data: 0 = input port, 1 = output port
• When specified for use as input ports:
The state of the input pin is transmitted to the controller
over the DO pin.
Input state: low = 0 data value
high = 1 data value
• When specified for use as output ports:
The output states are determined by the IO1 and IO2
bits in the serial data.
Data: 0 = open, 1 = low
• These pins function as input pins following a power on
reset.
• PLL charge pump output
When the frequency generated by dividing the local
oscillator signal 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.
• The n-channel MOS transistor used for the PLL active
low-pass filter.
• Accepts an input in the frequency range 0.4 to 12 MHz.
• The input signal is directly transmitted to the IF counter.
• The result is output starting the MSB of the IF counter
using the DO pin.
• Four measurement periods are supported: 4, 8, 16, and
32 ms.
IFIN
1 (–)
22 (–)
NC Pin
• No connection


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