NPC SM8703AV Datasheet
SM8703AV
NIPPON PRECISION CIRCUITS INC.
Clock Generator for MPEG2 System
OVERVIEW
The SM8703AV is a 27 MHz master clock, 5-system output clock generator for MPEG2 system. It has 2 builtin PLLs that, with the addition of a single crystal oscillator element, can generate 384fs, 512fs and 768fs
clocks which are necessary for MPEG2 system, plus independent fixed-frequency 27 MHz and 33.8688 MHz
output clocks. Each output can stop unused output by using disable function, therefore, unnecessary radiation
can be suppressed. Also, visual and audio synchronous is not disrupted since each output frequency is kept in
the normal ratio. Supported sampling frequencies (fs) include 44.1 or 48 kHz.
FEATURES
■
27 MHz master clock (internal PLL reference
PINOUT
(T op V iew)
clock)
■
Generated clocks
• 27 MHz output
• 33.8688 MHz output
• 384fs output
• 512fs output
• 768fs output
■
Sampling frequency fs
• 44.1/48 kHz
■
Output disable function
■
Low jitter output: 100 ps (typ, 15pF load)
■
Supply voltage: 3.3 V
■
24-pin VSOP package
1
VDD
VSS
MO1
MCK
MLEN
VDDA
VSSA
XTI RSV
XTO
RSV
RSV
12 13
SO1
SM8703AV
24
MO2
FSEL/MDT
SO5
RSV
SO2
VDD1
VSS1
SO3
SO4
VDD2
VSS2
APPLICATIONS
■
DVD players
■
Set top box
■
MPEG2 system
ORDERING INFORMATION
De vice Pack ag e
SM8703AV 24-pin VSOP
PACKAGE DIMENSIONS
(Unit: mm)
7.8 ± 0.1
7.6 ± 0.2
5.6 ± 0.1
+ 0.2
0.65
0.22 − 0.05
0.1
+ 0.1
NIPPON PRECISION CIRCUITS—1
0.13
0.1 ± 0.1
M
1.25 − 0.1
0 to 10
0.15
0.5 ± 0.2
+
0.05
−
0.02
BLOCK DIAGRAM
SM8703AV
FSEL/MDT
MCK
MLEN
XTI
XTO
External
Interface
Oscillator
Divider0
Divider1
Phase
Comparator0
Divider0
Phase
Comparator1
Divider1
Charge
Pump0
Charge
Pump1
LPF0 VCO0
LPF1 VCO1
Divider
SO5
SO4
SO3
SO2
SO1
MO1
MO2
NIPPON PRECISION CIRCUITS—2
SM8703AV
PIN DESCRIPTION
Number Name I/O Description
1 V DD – Po w er supply for Digital block
2 V SS – VSS for Digital block
3 MO1 O 27 MHz fixed-frequency output 1
1
4 MCK Ip
5 MLEN Ip
6 V DDA – Po w er supply for Analog block
7 VSSA – VSS for Analog block
8 XTI I Reference signal cr ystal oscillator element connection or external clock input
9 X T O O Re ference signal crystal oscillator element connection
10 R SV – Reserved (must be open)
11 R SV – Reserved (must be open)
12 SO1 O 33.8688 MHz fixed-frequency output
13 VSS2 – VSS for Output buffer
14 VDD2 – Power supply for Output buffer
15 SO 4 O 512fs output
16 SO 3 O 512fs output
17 R SV – Reserved (must be open)
18 VSS1 – VSS for Output buffer
19 VDD1 – Power supply for Output buffer
20 SO 2 O 384fs output
21 R SV – Reserved (must be open)
22 SO 5 O 768fs output
23 FSEL/MDT Ip
24 MO 2 O 27 MHz fixed-frequency output 2
1. Schmitt trigger input with internal pull-up resistor
Serial interface bit clock input
1
Serial interface latch enable input
Parallel mode: Sampling frequency select signal input
1
Ser ial mode: Control data input
NIPPON PRECISION CIRCUITS—3
+
+
−
SPECIFICATIONS
Absolute Maximum Ratings
Parameter Symbol Condition Rating Unit
V
V
V
V
V
V
V
V
V
V
V
V
V
V
DDA
DD1
DDA
DDA
DDA
DD
DD
DD1
SSA
SSA
SSA
SS
SS
SS1
Supply voltage range
Supply voltage deviation
Ground voltage deviation
Input voltage range V
Output voltage range V
Po w er dissipation P
Storage temperature range T
−
−
−
° C
°
SM8703AV
, V
,
– V
– V
– V
– V
– V
– V
– V
– V
– V
– V
– V
– V
OUT
stg
, V
IN
D
DD
DD2
DD
DD1
DD2
DD1
DD2
DD2
SS
SS1
SS2
SS1
SS2
SS2
,
,
,
,
,
,
,
,
,
,
Digital inputs
Digital outputs
0.3 to 6.5 V
±0.1 V
±0.1 V
0.3 to V
0.3 to V
0.3 V
DD
0.3 V
DD
300 m W
55 to 125
Recommended Operating Conditions
Parameter Symbol Condition Rating Unit
V
, V
opr
,
DD
, V
DD2
Supply voltage ranges
V
DDA
DD1
Operating temperature range T
3.0 to 3.6 V
–40 to 85
C
NIPPON PRECISION CIRCUITS—4
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