ICS650-14B Integrated Circuit System, ICS650-14B Datasheet - Page 2

• Manufacturer Part Number: ICS650-14B
• Description: Networkingclock Source
• Manufacturer: Integrated Circuit System

MDS 650-14B B
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • [phone]te l • www.icst.com
X1/ICLK
Pin Descriptions
Pin Assignment
Key: XI, XO = crystal connections; I = Input; I(Pu) = Input with pull up O = Output; P = power supply connection; TI = tri
level input
Number
SELB0
SELB1
CLKA5
CLKB
CLKC
VDD
GND
25M
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
X2
20 pin (150 mil) SSOP
1
2
3
4
5
6
7
8
9
10
X1/ICLK
Name
SELB0
SELB1
CLKA5
CLKA1
CLKA4
SELA1
CLKA3
CLKA2
SELA0
CLKB
CLKC
SELC
VDD
GND
GND
VDD
25M
OE
X2
11
19
18
17
16
15
14
13
12
20
Type Description
I(Pu)
I(Pu)
XO
TI
XI
P
P
O
O
O
O
O
O
P
TI
P
O
O
TI
TI
SELC
SELA0
CLKA2
CLKA3
VDD
SELA1
GND
CLKA4
CLKA1
OE
Select pin for CLKB. See Table 2.
Crystal connection. Connect to 25 MHz crystal or leave unconnected for a clock input.
Crystal connection. Connect to 25 MHz fundamental crystal or clock input.
Connect to +3.3 V or +5 V. Must be same as other VDDs.
Select pin for CLK B. See table 2.
Connect to ground.
Selectable clock output. See Table 2.
Selectable clock output. See Table 3.
Selectable clock output. See Table 1.
25.0 MHz clock output.
Output Enable. Tri-states all output clocks when low. Internal pull-up.
Selectable clock output. See Table 1.
Selectable clock output. See Table 1.
Connect to ground.
Select pin for CLKA1:4 and CLKA5 outputs. See Table 1.
Connect to +3.3V or +5.0V. Must be same as other VDDs.
Selectable clock output. See Table 1.
Selectable clock output. See Table 1.
Select pin for CLKA1:4 and CLKA5 outputs. See Table 1.
Select pin for CLKC output. See Table 3.
Table 1
Table 2
SELA1
SELB1
M
M
M
0
0
0
1
1
1
0
0
0
1
1
1
2
SELA0
SELB0
M
M
M
0
1
0
1
0
1
M
M
0
1
0
1
Networking System Clock
CLKA1:4
33.33
66.67
33.33
33.33
66.67
CLKB
83.33
19.44
100
50
50
25
30
27
48
80
0 = connect directly to ground
1 = connect directly to VDD
M = leave unconnected
(floating)
CLKA5
133.33
66.66
33.33
83.33
125
100
100
Table 3
75
75
SELC
M
0
1
ICS650-14B
Revision 072401
CLKB/4
CLKC
62.5
125