MK2703SI [ICSI]
PLL Audio Clock Synthesizer; 音频PLL时钟合成器
| 型号： | MK2703SI |
| 厂家： | 
INTEGRATED CIRCUIT SOLUTION INC |
| 描述： | PLL Audio Clock Synthesizer |
| 文件： | 总4页 (文件大小：66K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MK2703
PLL Audio Clock Synthesizer
ICR O CLOC K
Features
Description
The MK2703 is a low cost, low jitter, high
performance PLL clock synthesizer designed to
replace oscillators and PLL circuits in set-top box
and multimedia systems. Using our patented
analog Phase-Locked Loop (PLL) techniques, the
device uses a 27 MHz crystal or clock input to
produce a buffered reference clock and a selectable
audio clock.
• Packaged in 8 pin SOIC
• Uses an inexpensive fundamental crystal, or clock
• Supports MPEG sampling rates of 32 kHz,
44.1 kHz, 48 kHz and 96 kHz
• Patented zero ppm synthesis error in all clocks
• All frequencies are frequency locked
• 25 mA output drive capability at TTL levels
• Advanced, low power, sub-micron CMOS process
• 3.3 V or 5 V operating voltage
MicroClock manufactures the largest variety of
Set-Top Box and multimedia clock synthesizers
for all applications. Consult MicroClock to
eliminate VCXOs, crystals and oscillators from
your board.
• For audio clocks that require lower jitter, use the
MK2731-03C
• Industrial temperature version available
Block Diagram
VDD GND
2
S1:0
PLL
Clock Synthesis
and Control
Circuitry
Output
Buffer
Audio Clock
27.000 MHz
27 MHz crystal or
clock
X1
Crystal
Oscillator
Output
Buffer
X2
(Capacitors are required
for crystal tuning)
MDS 2703 C
1
Revision 062700
Printed 11/16/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126• (408) 295-9800tel • www.icst.com
MK2703
PLL Audio Clock Synthesizer
ICR O CLOC K
Pin Assignment
MK2703
1
8
7
6
5
Audio Clock Output Select Table (MHz)
X2
S0
X1
S1
0
S0
0
CLK
8.192
2
3
4
VDD
GND
0
1
1
1
0
1
11.2896
12.288
24.576
S1
27M
CLK
8 pin SOIC
Key: 0 = connect pin directly to ground
1 = connect pin directly to VDD
Pin Descriptions
Number
Name
Type Description
XI Crystal Connection. Connect to a 27.0 MHz fundamental crystal or clock.
1
2
3
4
5
6
7
8
X1
VDD
GND
27M
CLK
S1
P
P
Connect to +3.3V or +5V.
Connect to ground.
O
O
27.00 MHz buffered reference clock output.
Audio Clock Output per table above.
I(PU) Audio Clock Frequency Select Input #1. Determines CLK output per table above.
I(PU) Audio Clock Frequency Select Input #0. Determines CLK output per table above.
XO Crystal Connection to a 27.0 MHz crystal, or leave unconnected for clock input.
S0
X2
Key: XI, XO = Crystal connections; I(PU)= Input with internal pull-up resistor; O = output;
P = power supply connection
MDS 2703 C
2
Revision 062700
Printed 11/16/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126• (408) 295-9800tel • www.icst.com
MK2703
PLL Audio Clock Synthesizer
ICR O CLOC K
Electrical Specifications
Parameter
Conditions
Minimum
Typical
Maximum
Units
ABSOLUTE MAXIMUM RATINGS (note 1)
Supply voltage, VDD
Referenced to GND
7
VDD+0.5
70
V
V
Inputs and Clock Outputs
Ambient Operating Temperature
Referenced to GND
MK2703S
-0.5
0
°C
°C
°C
°C
MK2703SI
-40
85
Soldering Temperature
Storage temperature
Max of 10 seconds
260
-65
150
DC CHARACTERISTICS (VDD = 3.3 V unless noted)
Operating Voltage, VDD
3.13
5.50
(VDD/2)-1
0.8
V
V
Input High Voltage, VIH, X1 pin only
Input Low Voltage, VIL, X1 pin only
Input High Voltage, VIH
(VDD/2)+1
VDD/2
VDD/2
V
2
V
Input Low Voltage, VIL
V
Output High Voltage, VOH
Output Low Voltage, VOL
Output High Voltage, VOH, CMOS level
Operating Supply Current, IDD
Short Circuit Current
IOH=-12mA
IOL=12mA
IOH=-4mA
No Load
2.4
V
0.4
V
VDD-0.4
V
25
±50
5
mA
mA
pF
ppm
Each output
S1, S0
Input Capacitance
Frequency synthesis error
All clocks
0
AC CHARACTERISTICS (VDD = 3.3 V unless noted)
Input Crystal Frequency
27.00
MH z
ppm
ns
Input Crystal Accuracy
±30
1.5
1.5
60
Output Clock Rise Time
0.8 to 2.0V
2.0 to 0.8V
At VDD/2
Output Clock Fall Time
ns
Output Clock Duty Cycle
Maximum Absolute Jitter, short term
40
%
±190
ps
Notes: 1. Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device. Prolonged
exposure to levels above the operating limits but below the Absolute Maximums may affect device reliability.
External Components
The MK2703 requires a minimum number of external components for proper operation. For a crystal input,
one load capacitor should be connected from each of the X1 and X2 pins to ground. The value (in pF) of
each crystal load capacitor should equal (C -16)•2, where C is the crystal’s load (correlation) capacitance
L
L
in pF. The input crystal must be connected as close to the chip as possible. The input crystal should be a
parallel resonant, fundamental, AT cut 27 MHz. For a clock input, connect to X1 and leave X2
unconnected. Decoupling capacitors of 0.01µF should be connected between VDD and GND on pins 2
and 3, as close to the MK2703 as possible. A series termination resistor of 33 Wmay be used for the clock
output.
MDS 2703 C
3
Revision 062700
Printed 11/16/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126• (408) 295-9800tel • www.icst.com
MK2703
PLL Audio Clock Synthesizer
ICR O CLOC K
Package Outline and Package Dimensions
(For current dimensional specifications, see JEDEC Publication No. 95.)
8 pin SOIC
Inches
Min
Millimeters
Symbol
A
Max
Min
1.35
0.10
0.33
0.19
4.80
3.80
1.27 BSC
5.80
0.25
0.41
Max
0.0532 0.0688
0.0040 0.0098
0.0130 0.0200
0.0075 0.0098
0.1890 0.1968
0.1497 0.1574
.050 BSC
1.75
0.24
0.51
0.24
5.00
4.00
A1
B
C
E
H
INDEX
AREA
D
E
e
H
h
0.2284 0.2440
0.0099 0.0195
0.0160 0.0500
6.20
0.50
1.27
1
2
L
h x 45°
D
A
A1
C
B
e
L
Ordering Information
Part/Order Number
MK2703S
Marking
MK2703S
MK2703S
MK2703I
MK2703I
Shipping packaging
tubes
Package
Temperature
0 to 70°C
8 pin SOIC
8 pin SOIC
8 pin SOIC
8 pin SOIC
MK2703STR
MK2703SI
tape and reel
tubes
0 to 70°C
-40 to 85°C
-40 to 85°C
MK2703SITR
tape and reel
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Inc. (ICS) assumes no responsibility for either its use or for
the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use
in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental
requirements are not recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize
or warrant any ICS product for use in life support devices or critical medical instruments.
MDS 2703 C
4
Revision 062700
Printed 11/16/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126• (408) 295-9800tel • www.icst.com
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