SM8706A Datasheet, PDF (2/8 Pages) Nippon Precision Circuits Inc – Clock Generator for DVD Players

BLOCK DIAGRAM
SM8706A
FSEL
Reference
Divider 0
Phase
Detector 0
Charge
Pump 0
LPF 0
VCO 0
AO1
XTI
X'tal
OSC
XTO
AO2
Loop
Divider 0
(PLL 0)
SO1
Control
Reference
Divider 1
Phase
Detector 1
Charge
Pump 1
LPF 1
VCO 1
Logic
SO2
(PLL 1)
Loop
Divider 1
CE
MO1
MO2
PIN DESCRIPTION
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Name
VDD1
VSS1
MO1
MO2
VDD2
VSS2
XTI
XTO
AO1
AO2
VSS3
VDD3
SO1
FSEL
SO2
CE
I/O
Description
–
Supply 1 for digital block
–
Ground 1 for digital block
O
Video system output 1 (27MHz fixed)
O
Video system output 2 (54MHz fixed)
–
Supply 2 for analog block
–
Ground 2 for analog block
I
Crystal oscillator connection or external clock input
O
Crystal oscillator connection
O
Audio system output 1 (384fs output)
O
Audio system output 2 (768fs output)
–
Ground 3 for digital block
–
Supply 3 for digital block
O
Signal processor system output 1 (16.9344MHz fixed)
Sampling frequency select
I
FSEL = HIGH: fs = 48kHz
FSEL = LOW: fs = 44.1kHz
(with internal pull-up resistor, Schmitt-trigger input)
O
Signal processor system output 2 (33.8688MHz fixed)
I
Chip enable (HIGH = Enable, LOW = Disable)
NIPPON PRECISION CIRCUITS—2