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LC7152 View Datasheet(PDF) - SANYO -> Panasonic

Part Name
Description
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LC7152 Datasheet PDF : 13 Pages
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LC7152, 7152M, 7152NM, 7152KM
Pin Description
Symbol
PIA
PIB
XIN
XOUT
PDA1
PDB1
PDA2
PDB2
LDA
LDB
AIA
AOA
AIB
OAB
OUTA
OUTB
Pin No.
14
16
1
24
10
22
9
23
6
5
11
12
21
20
13
19
Function
Side-A local oscillator signal
input
. Description of function
Side-A programmable divider. The input frequency ranges are as follows.
FA = [0]
FA = [1]
1.5 to 23 MHz 20 to 55 MHz
VDD
2.0 to 3.3 V
Device
LC7152, 7152M
LC7152NM, 7152KM
————— 55 to 80 MHz 2.7 to 3.3 V LC7152KM
. FA: Serial data
Bits DA0 to DA15 determine the divider ratios
. Side-B local-oscillator signal
Divider ratio N = 272 to 65535
Side-B programmable divider
input
The input frequency ranges are the same as for PIA.
. FB(FA): Determined by the serial data
Bits DB0 to DB15 determine the divider ratios
. Divider ratio N= 272 to 65535
Serial data: Bit SB is the standby mode control bit
When SB = 1, standby mode is selected. In standby mode, side-B is
Crystal oscillator
stopped, PIB is pulled down to VSS.
. When SB = 0, normal operation is selected.
Crystal oscillator connections (CI % 50 , CL % 16pF).
Note) When using a crystal other than as indicated above, its compatibility
Side-A main charge pump
. with the crystal oscillator must be thoroughly studied.
These are PLL charge pump outputs that output the PLL phase error
signals. When the frequency generated by dividing the local oscillator signal
frequency by N is higher than the reference frequency, the charge pump
outputs a high-level signal for the phase error; when lower, the charge pump
outputs a low-level signal for the phase error.
Side-B main charge pump
.If the two values match, these pins go to high-impedance.
fosc/N > fref or leading
. Positive Pulse
fosc/N < fref or lagging
. Negative Pulse
fosc/N = fref and coincidence
High-Impedance
Side-A sub charge pump
.(*SB = [1] : PDB1 High-Impedance)
PLL charge pump output; outputs PLL phase error signal only when the
Side-B sub charge pump
unlock condition is detected.
. The unlock detection threshold is set by serial data bits UL0 and UL1.
. When a phase error that is shorter than the detection threshold occurs, this
signal goes to high impedance and the phase error signal for the main
. charge pump is output.
The output pulse of the phase error signal has the same polarity as the main
. charge pump.
Side-A unlock detector output Outputs the PLL lock/unlock status.
Locked: Open
. Unlocked: Low
The unlock detection threshold for lock/unlock discrimination is set by serial
. Side-B unlock detector output
... Side-A low-pass filter transistor
data bits UL0 and UL1.
The output phase error extension is set by serial data bits UE0 and UE1.
For details, refer to the description of the serial data.
SB = 1: LDB Open
MOS N-channel transistor for the PLL filter
. Side-B low-pass filter transistor The AOA and AOB output withstand voltage is 13V.
Side-A general purpose
. These latch the serial data bits OA and OB that are sent from the controller,
output port
and then invert and output the data.
Side-B general purpose
output port
. (OUTA can also output XIN divided by two.
In the LC7152NM, OUTA and OUTB are open at the power-on reset.
For more information on crystal oscillator : Nihon Dempa Kogyo Co., Ltd.
Continued on next page.
No.3889-5/13
 

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