SM5165AV Datasheet, PDF (2/10 Pages) Nippon Precision Circuits Inc – PLL Synthesizer IC

BLOCK DIAGRAM
XIN
XOUT
1/8
PRESCALER
VDD1
AREA
VDD2
VDD2
AREA
DATA
CLK
LE
∗
OPR
LATCH
SELECTER
SM5165AV
11 BIT
R COUNTER
LEVEL
SHIFTER
VDD2
AREA
11 BIT LATCH
22 BIT
SHIFT REGISTER
PHASE
DETECTOR
18 BIT LATCH
VDD3
AREA
BOOSTER
S. G.
CHARGE
PUMP
TEST
RO
VDD3
DB
DO
VDD1
FIN
VDD1
AREA
18 BIT
N COUNTER
LEVEL
SHIFTER
LEVEL
SHIFTER
WINDOW
GENERATOR
VDD2
AREA
VSS
∗Protection diodes are connected to VDD3. Logic level : VDD2 to VDD3
PIN DESCRIPTION
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Name
VDD1
FIN
VSS1
RO
TEST
DO
DB
NC
VDD3
VDD2
OPR
DATA
CLK
LE
XOUT
XIN
I/O
Description
– Reference frequency and comparator frequency prescaler and counter 1 V supply
I
Operating frequency divider input pin.
Feedback resistor built-in for AC-coupled inputs.
– Ground pin
O
Test output.
LOW-level output for (1, 0) test bit patter. Leave open for normal operation.
I
Test pin.
Pull-down resistor built-in. Leave open or connect to ground for normal operation.
Phase detector output pin.
O Built-in charge pump and tristate output means that this output can be connected to a low-pass filter.
The output polarity is preset for connection to a passive filter.
O Booster signal output for faster locking
– No connection
– Phase comparator, charge pump and booster signal 3 V supply
–
Shift register and latch 1 V supply.
Should be kept at the same potential as VDD1.
I
Power-save control pin.
Operation when HIGH, standby mode when LOW.
I Control data input pin
I Control data clock input pin
I Control data latch enable signal input pin
O Reference frequency divider crystal oscillator connection pins. Alternatively, an external clock input can
be connected to XIN. The clock is also output on XOUT.
I _{Feedback resistor built-in for AC-coupled inputs.}
NIPPON PRECISION CIRCUITS—2