mk2703b Integrated Device Technology, mk2703b Datasheet - Page 2

• Manufacturer Part Number: mk2703b
• Description: Pll Audio Clock Synthesizer
• Manufacturer: Integrated Device Technology

MDS 2703B C
In te grated Circuit Systems
Pin Assignment
Pin Descriptions
External Components
Decoupling Capacitor
As with any high-performance mixed-signal IC, the
MK2703B must be isolated from system power supply
noise to perform optimally.
A decoupling capacitor of 0.01µF must be connected
between VDD and GND on pins 2 and 3. It must be
connected close to the MK2703B to minimize lead
inductance. No external power supply filtering is
required for the MK2703B.
Number
GND
VDD
27M
Pin
X1
1
2
3
4
5
6
7
8
8-pin (150 mil) SOIC
1
2
3
4
Name
GND
VDD
27M
CLK
Pin
X1
S1
S0
X2
●
Output
Output
Power
Power
525 Ra ce Street, San Jose, CA 9512 6
Type
Input
Input
Pin
XO
XI
8
7
6
5
X2
S0
S1
CLK
Crystal Connection. Connect to a 27 MHz fundamental crystal or clock.
Connect to +3.3 V or +5 V.
Connect to ground.
27 MHz buffered reference clock output.
Audio clock output per table above.
Audio clock frequency select input #1. Determines CLK output per table
above. Internal pull-up resistor.
Audio clock frequency select input #0. Determines CLK output per table
above. Internal pull-up resistor.
Crystal connection to a 27 MHz crystal, or leave unconnected for clock
output.
2
A
Series Termination Resistor
A 33Ω terminating resistor can be used next to the
clock outputs for trace lengths over one inch.
Crystal Load Capacitors
The total on-chip capacitance is approximately 16 pF. A
parallel resonant, fundamental mode, AT cut 27 MHz
crystal should be used. The device crystal connections
should include pads for small capacitors from X1 to
ground and from X2 to ground. These capacitors are
used to adjust the stray capacitance of the board to
UDIO
Key: 0 = Connect pin directly to ground
Pin Description
S1
C
0
0
1
1
1 = Connect pin directly to VDD
LOCK
●
tel [phone]
PLL A
S0
0
1
0
1
O
UTPUT
UDIO
C
S
LOCK
CLK (MHz)
ELECT
11.2896
12.288
24.576
8.192
●
w w w. i c s t . c o m
S
Revision 012006
YNTHESIZER
MK2703B
T
ABLE