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

ICS650-40A
ETHERNET SWITCH CLOCK SOURCE
Pin Assignment
X1/ICLK 1
VDD 2
GNDA 3
VDDOA 4
CLKA 5
CLKA 6
GNDA 7
S1 8
16 X2
15 VDD
14 OE
13 GND
12 VDDOB
11 CLKB
10 GNDB
9 S0
16-pin (173 mil) TSSOP
Output Select Table (MHz)
S1
S0 CLKA CLKA CLKB
(MHz) (MHz) (MHz)
0
0
127
127
157
0
1
133
133
189
1
0
157
157
127
1
1
189
189
133
Pin Descriptions
Pin
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Pin
Name
X1/ICLK
VDD
GNDA
VDDOA
CLKA
CLKA
GNDA
S1
S0
GNDB
CLKB
VDDOB
GND
OE
15
VDD
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 CLKA outputs only.
Output Clock A output with weak pull-down resistor.
Output Clock A output with weak pull-down resistor.
Power Connect to ground.
Input Select pin 1.
Input Select pin 0.
Power Connect to ground.
Output Clock B output with weak pull-down resistor.
Power Connect to +2.5 V or 3.3 V. For clock output B only.
Power Connect to ground.
Input
Output enable tri-states outputs and device is not shut down. This input
has internal pull-up resistor. OE = 1 enables outputs A and B and OE=0
disables outputs A and B. When disabled the pull-down resistor pulls the
outputs to GND.
Power Connect to +3.3 V.
Output Crystal connection. Leave unconnected for clock input.
MDS 650-40A B
2
Revision 121004
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