ICS650-40 Datasheet, PDF (2/6 Pages) Integrated Circuit Systems – ETHERNET SWITCH CLOCK SOURCE

ICS650-40
ETHERNET SWITCH CLOCK SOURCE
Pin Assignment
X1/ICLK 1
VDD 2
GND 3
VDDOA 4
CLKA 5
CLKB 6
VDDOB 7
GND 8
16 X2
15 GND
14 OE
13 GND
12 VDD
11 VDD
10 S1
9 S0
16-pin (173 mil) TSSOP
Output Select Table (MHz)
S1
S0 CLKA CLKB
(MHz) (MHz)
0
0
127
127
0
1
133
133
1
0
157
157
1
1
189
189
Pin Descriptions
Pin
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Pin
Name
X1/ICLK
VDD
GND
VDDOA
CLKA
CLKB
VDDOB
GND
S0
S1
VDD
VDD
GND
OE
15
GND
16
X2
Pin
Type
Pin Description
Input Crystal or clock input. Connect to a 25 MHz crystal or single ended clock.
Power Connect to +3.3 V.
Power Connect to ground.
Power Connect to +2.5 V or +3.3 V. For clock output buffer A only.
Output Clock A output with weak pull-down resistor.
Output Clock B output with weak pull-down resistor.
Power Connect to +2.5 V or +3.3 V. For clock output buffer B only.
Power Connect to ground.
Input Select pin 0.
Input Select pin 1.
Power Connect to +3.3 V.
Power Connect to +3.3 V.
Power Connect to ground.
Input Output enable tri-states outputs and device is not shut down. Internal
pull-up resistor.
Power Connect to ground.
Output Crystal connection. Leave unconnected for clock input.
MDS 650-40 C
2
Revision 060705
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