ICS149317 Datasheet, PDF (2/11 Pages) Integrated Circuit Systems – Clock Synthesizer for Portable Systems

PRELIMINARY INFORMATION
ICS1493-17
Clock Synthesizer for Portable Systems
Pin Assignment
GND 1
48M
VDDO
OE
VDD
6
16
GND
VDD
37M
VDDO
11 22/24M
Output Enable Table
OE
Clock Output State
0
Normal Operation
1
Hi-Z
Note: OE pin has an internal pull-down resistor.
20-pin QFN
Pin Descriptions
Pin
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Pin
Name
GND
48M
VDDO
OE
VDD
22M
GND
SCK
SDATA
GND
22/24M
VDDO
37M
VDD
GND
GND
27M
Pin
Type
Pin Description
Power Connect to ground.
Output 48 MHz clock output. High impedance state when OE=1.
Power Output voltage level. Connect to +1.8 or 2.5 V. Same voltage as pin
12.
Input Output Enable pin. See table above. Internal pull-down resistor.
Power Connect to +1.8 V.
Output
Power
Input
Input
22.5792 MHz clock output. Internal pull-down. High impedance state
when OE=1.
Connect to ground.
I²C bus clock pin. Internal pull-up resistor.
I²C bus data pin. Internal pull-up resistor.
Power Connect to ground.
Output Selectable output clock of either 22.5792M or 24.576M. See table.
Internal pull-down. High impedance state. OE=1.
Power Output voltage level. Connect to +1.8 or 2.5 V. Same voltage as pin 3.
Output Spread spectrum 37 MHz clock output. See table. Internal pull-down.
High impedance state when OE=1.
Power Connect to +1.8 V.
Power Connect to ground.
Power Connect to ground.
Output 27 MHz reference clock output. Internal pull-down. High impedance
state when OE=1.
MDS 1493-17 A
2
Revision 101005
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