mk2049-01 ETC-unknow, mk2049-01 Datasheet - Page 2

• Manufacturer Part Number: mk2049-01
• Description: Communications Clock
• Manufacturer: ETC-unknow

MDS 2049-01 J
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • [phone]tel •www.icst.com
Pin Assignment
Pin Descriptions
Type: I = Input, O = output, P = power supply connection, LF = loop filter connection
Number
CLK2
CLK1
VDD
VDD
VDD
GND
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
FS1
X2
X1
8K
20 pin (300 mil) SOIC
1
2
3
4
5
6
7
8
9
10
Name
CLK2
CLK1
VDD
VDD
VDD
GND
ICLK
GND
VDD
CAP1
GND
CAP2
GND
FS1
FS2
FS3
FS0
X2
X1
8K
Type Description
LF
LF
O
O
O
O
P
P
P
P
P
P
P
P
I
I
I
I
I
I
20
19
18
17
16
15
14
13
12
11
Frequency Select 1. Determines CLK input/outputs per tables above.
Crystal conection. Connect to a 12.288 MHz or 12.96 MHz crystal.
Crystal conection. Connect to a 12.288 MHz or 12.96 MHz crystal.
Connect to +5V.
Connect to +5V.
Connect to +5V.
Connect to ground.
Clock 2 output determined by status of FS3:0 per tables above.
Clock 1 output determined by status of FS3:0 per tables above. CLK2 divided by 2.
Recovered 8 kHz clock output. On External mode only.
Frequency Select 2. Determines CLK input/outputs per tables above.
Frequency Select 3. Determines CLK input/outputs per tables above.
Input clock connection. Connect to 8 kHz backplane or to Loop Timing clock.
Connect to ground.
Connect to +5V.
Connect a 0.030 µF ceramic capacitor and a 7.5 M
Connect to ground.
Connect a 0.030 µF ceramic capacitor and a 7.5 M
Connect to ground.
Frequency Select 0. Determines CLK input/outputs per tables above.
FS3
FS2
FS0
GND
CAP2
CAP1
VDD
GND
ICLK
GND
Output Decoding Table – External Mode (MHz)
Output Decoding Table – Loop Timing Mode (MHz)
• 0 = connect directly to ground, 1 = connect directly to VDD.
• Crystal is applied to pins 2 and 3; clock input is applied to pin 13.
44.736
34.368
Input
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
Input
1.544
2.048
2
FS3
FS3
0
0
0
0
0
1
1
1
1
FS2
FS2
0
0
0
0
1
0
0
0
0
Communications Clock PLL
FS1
FS1
0
0
1
1
1
0
0
1
1
resistor in series between this pin and CAP2.
resistor in series between this pin and CAP1.
FS0
FS0
0
1
0
1
1
0
1
0
1
CLK1
22.368
17.184
CLK1
22.368
17.184
1.544
2.048
19.44
1.544
2.048
CLK2
44.736
34.368
CLK2
44.736
34.368
3.088
4.096
38.88
3.088
4.096
MK2049-01
Revision 040601
Crystal
Crystal
12.288
12.288
12.288
12.288
12.288
12.288
12.288
12.288
12.96