mk1412 Holt Integrated Circuits, Inc., mk1412 Datasheet - Page 2

• Manufacturer Part Number: mk1412
• Description: Mpeg Audio Clock Synthesizer
• Manufacturer: Holt Integrated Circuits, Inc.

Pin Assignment
MDS 1412 B
Integrated Circuit Systems, Inc.• 525 Race Street• San Jose • CA • 95126• [phone]tel •www.icst.com
External Components/Crystal Selection
A minimum number of external components are required for proper oscillation. For a crystal input, one
load capacitor can be connected to each of the X1 and X2 pins and ground, and a parallel resonant
14.31818 MHz crystal is recommended. The value (in pF) of each crystal load capacitor should equal
(C
capacitance (or less), no extra capacitors are needed. The frequency tolerance of the crystal should be
50ppm or better. For a clock input, connect to X1 and leave X2 unconnected. A decoupling capacitor of
0.1µF should be connected between VDD and GND on pins 2 and 3, and 33 terminating resistor may
be used on the clock outputs if the trace is longer than 1 inch.
Pin Descriptions
Key: I = Input, O = output, P = power supply connection
CLK/2
Number
GND
VDD
L
-18)*2, where C
1
2
3
4
5
6
7
8
X1
CLK/2
Name
VDD
GND
CLK
1
2
3
4
X1
X2
S0
S1
8 pin SOIC
L
Type Description
is the crystal’s load (correlation) capacitance in pF. So for crystals with 18 pF load
O
O
O
P
P
I
I
I
Crystal Connection. Connect to a 14.31818 MHz crystal or clock.
Connect to +3.3V or +5V.
Connect to ground.
Audio Clock divide by 2 output as per table above.
Frequency Select 0 Input. Determines CLK and CLK/2 outputs as per table above.
Frequency Select 0 Input. Determines CLK and CLK/2 outputs as per table above.
Audio Clock output as per table above.
Crystal Connection to a 14.31818 MHz crystal, or leave unconnected for clock input.
8
7
6
5
CLK
S1
S0
X2
Audio Clock Outputs Select Table (MHz)
S1
0
0
1
1
2
MPEG Audio Clock Synthesizer
S0
0
1
0
1
22.5792
16.384
24.576
49.152
CLK
Revision 060200
11.2896
CLK/2
12.288
24.576
8.192
Accuracy
25 ppm
1 ppm
1 ppm
1 ppm
MK1412
Printed 11/15/00