NPC SM8706AV Datasheet
SM8706A
NIPPON PRECISION CIRCUITS INC.
Clock Generator for DVD Players
OVERVIEW
The SM8706A is a clock generator IC that generates 3 clocks with 6 outputs from a 36.8640MHz master clock
for application in DVD players. The SM8706A has 2 built-in PLL circuits that together with a crystal oscillator
can generate the 384fs and 768fs audio system clocks, 27MHz and 54MHz video system clocks, and
16.9344MHz and 33.8688MHz signal processor system clocks required for a DVD player. The SM8706A also
supports the 44.1kHz and 48kHz sampling frequencies, and the sampling frequency can be switched while the
device is operating.
FEATURES
■
36.8640MHz master clock (internal PLL reference
clock)
■
Generated clocks
• Video system output: 27MHz, 54MHz
• Audio system output: 384fs, 768fs
• Signal processor system output: 16.9344MHz,
33.8688MHz
■
Supported sampling frequency fs: 44.1/48kHz
■
Low jitter output: 40ps (typ, 1-sigma, 25pF load)
■
Supply voltage: 3.3V ± 0.3V
■
16-pin VSOP package
APPLICATIONS
PINOUT
(Top view)
VDD1
1
16
VSS1
MO1
8706AV
MO2
VDD2
VSS2
XTI
XTO AO1
8
9
CE
SO2
FSEL
SO1
VDD3
VSS3
AO2
■
DVD players
■
DVD car navigation system
ORDERING INFORMATION
Device Package
SM8706AV 16-pin VSOP
PACKAGE DIMENSIONS
(Unit: mm)
Weight: 0.07g
4.4 0.2
6.4 0.2
0.275typ
5.1 0.2
1.15 0.1
0.10 0.05
0.65
0.22
+ 0.1
- 0.05
0.10
0.12
M
0.5 0.2
0.15
+ 0.1
- 0.05
0 to 10
NIPPON PRECISION CIRCUITS—1
BLOCK DIAGRAM
SM8706A
FSEL
XTI
XTO
CE
X'tal
OSC
PIN DESCRIPTION
Reference
Divider 0
(PLL 0)
Reference
Divider 1
(PLL 1)
Phase
Detector 0
Loop
Divider 0
Phase
Detector 1
Loop
Divider 1
Charge
Pump 0
Charge
Pump 1
LPF 0 VCO 0
LPF 1 VCO 1
Control
Logic
AO1
AO2
SO1
SO2
MO1
MO2
Number Name I/O Description
1 VDD1 – Supply 1 for digital block
2 VSS1 – Ground 1 for digital block
3 MO1 O Video system output 1 (27MHz fixed)
4 MO2 O Video system output 2 (54MHz fixed)
5 VDD2 – Supply 2 for analog block
6 VSS2 – Ground 2 for analog block
7 XTI I Crystal oscillator connection or external clock input
8 XTO O Crystal oscillator connection
9 AO1 O Audio system output 1 (384fs output)
10 AO2 O Audio system output 2 (768fs output)
11 VSS3 – Ground 3 for digital block
12 VDD3 – Supply 3 for digital block
13 SO1 O Signal processor system output 1 (16.9344MHz fixed)
Sampling frequency select
14 FSEL I
15 SO2 O Signal processor system output 2 (33.8688MHz fixed)
16 CE I Chip enable (HIGH = Enable, LOW = Disable)
FSEL = HIGH: fs = 48kHz
FSEL = LOW: fs = 44.1kHz
(with internal pull-up resistor, Schmitt-trigger input)
NIPPON PRECISION CIRCUITS—2
−
−
+
−
+
−
° C
° C
−
−
−
SM8706A
Note: Unless otherwise noted, VDD applies to VDD1, VDD2, and VDD3. Similarly, VSS applies to VSS1,
VSS2, and VSS3.
SPECIFICATIONS
Absolute Maximum Ratings
Parameter Symbol Condition Rating Unit
Supply voltage range V
Supply voltage deviation
Input voltage range V
Output voltage range V
Power dissipation P
Storage temperature range T
DD1
V
V
V
DD1
DD1
DD2
, V
DD2
– V
– V
– V
OUT
, V
DD3
,
DD2
,
DD3
DD3
IN
D
stg
0.3 to 6.5 V
± 0.1 V
0.3 to V
0.3 to V
0.3 V
DD
0.3 V
DD
165 mW
55 to 125
Recommended Operating Conditions
V
= V
SS1
= V
SS
Parameter Symbol Condition
Supply voltage ranges
Output load capacitance 1 C
Output load capacitance 2 C
Master clock frequency f
Operating temperature range T
1. The supply voltage is defined relative to V
2. The supply voltages applied on VDD1, VDD2, and VDD3 should be derived from a common supply source.
SS2
1, 2, 3
= V
= 0V unless otherwise noted.
SS3
V
, V
DD2
XTAL
opr
SS
L1
L2
= 0V
, V
DD3
MO1, SO1, SO2 outputs – – 25 pF
All outputs excluding MO1,
SO1, SO2, XTO
When using crystal oscillator – 36.8640 – MHz
DD1
Rating
min typ max
Unit
+ 3.0 – + 3.6 V
– – 15 pF
– 40 – + 85
3. If the supply voltages on VDD1, VDD2, and VDD3 are from different sources, they should be applied simultaneously. The SM8706A may be damaged
if the supply voltage timing is different.
DC Electrical Characteristics
f
= 36.8640MHz, V
XTAL
Parameter Symbol Condition
Current consumption I
HIGH-level input voltage V
LOW-level input voltage V
HIGH-level input current
LOW-level input current
1
1
HIGH-level input current I
LOW-level input current I
HIGH-level output voltage V
LOW-level output voltage V
1. FSEL and CE pins have Schmitt-trigger input and built-in pull-up resistor.
= 3.0V ± 0.3V, V
DD
DD
IH
IL
I
IH1
I
IL1
IH2
IL2
OH
OL
= 0V, Ta = – 40 to 85 ° C unless otherwise noted.
SS
min typ max
V
= 3.3V, Ta = 25 ° C, fs = 48kHz,
DD
Crystal oscillator, no load on all
–3545mA
outputs
0.8 V
FSEL, CE, XTI, V
FSEL, CE, V
FSEL, CE, V
XTI, V
= V
IN
XTI, V
= 0V – 40 –
IN
= 3.3V
DD
= V
IN
DD
= 0V – 100 –
IN
DD
All outputs excluding XTO,
I
= − 2mA
OH
All outputs excluding XTO,
I
= 2mA
OL
DD
– – 0.2 V
––1µA
– – 40 µA
0.4 – – V
V
DD
– – 0.4 V
Rating
Unit
––V
DD
V
µA
µA
NIPPON PRECISION CIRCUITS—3
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