sm5170 Nippon Precision Circuits Inc, (NPC), sm5170 Datasheet - Page 2

• Manufacturer Part Number: sm5170
• Description: Pll Synthesizer Ic
• Manufacturer: Nippon Precision Circuits Inc, (NPC)

BLOCK DIAGRAM
PIN DESCRIPTION
Number
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
XOUT
DATA
CLK
OPR
XIN
FIN
LE
XOUT
Name
VDD2
VDD1
TEST
DATA
OPR
VSS
CLK
XIN
FIN
DO
NC
NC
DB
LD
LE
VDD1 AREA(1V)
VDD2 AREA(3V)
VDD1 AREA(1V)
I/O
O
O
O
O
–
–
–
–
–
I
I
I
I
I
I
I
Selector
Dual Modulus
1/4 Prescaler
Latch
Prescaler
Supply
1V
3V
1V
3V
3V
1V
1V
3V
3V
1V
1V
3V
3V
–
–
–
Reference frequency divider crystal oscillator connection pins. Alternatively, an external clock input can
be connected to XIN. The clock is output on XOUT. Feedback resistor built-in for AC-coupled inputs.
Phase comparator, charge pump and booster signal 3V supply
Booster signal output for faster locking
Phase comparator output pin. 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.
Ground pin
FIN input frequency divider input pin. Feedback resistor built-in for AC-coupled inputs.
Reference frequency and FIN input frequency prescaler and counter 1V supply
No connection
Unlock signal output pin. (Unlocked when LOW). The function of LD can be turned OFF using the LD
input control bit (LD should be tied LOW when not used).
Control data clock input pin
Control data input pin
Control data latch enable signal input pin
Power-save control pin. Start when HIGH, standby mode when LOW.
No connection
Test pin. Pull-down resistor built-in. Leave open or connect to ground for normal operation.
5Bit Swallow
22Bit Shift Register
Counter
16Bit R-Counter
17Bit N-Latch
16Bit R-Latch
12Bit Main
Counter
SM5170AV
Shifter
Level
Description
Detector
Phase
Generator
Signal
Boost
SEIKO NPC CORPORATION —2
Detector
Charge
Pump
Lock
DB
DO
LD