MK2049-36SITR IDT, Integrated Device Technology Inc, MK2049-36SITR Datasheet - Page 3

• Manufacturer Part Number: MK2049-36SITR
• Description: IC VCXO PLL CLK SYNTH 20-SOIC
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: PLL Clock Synthesizerr

Specifications of MK2049-36SITR

• Pll: Yes
• Input: Clock
• Output: Clock
• Number Of Circuits: 1
• Ratio - Input:output: 1:3
• Differential - Input:output: No/No
• Frequency - Max: 77.76MHz
• Divider/multiplier: Yes/Yes
• Voltage - Supply: 3.15 V ~ 3.45 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC
• Frequency-max: 44.736MHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Output Decoding Table - External Mode (MHz)
Output Decoding Table - Buffer Mode (MHz)
0 = connect directly to ground, 1 = connect directly to VDD or leave open.
Crystal is connected to pins 2 and 3; clock input is applied to pin 13.
Operating Modes
The MK2049-36 has two operating modes: External and Buffer. Although both modes use an input clock to generate various
output clocks, there are important differences in their input and crystal requirements.
External Mode
The MK2049-36 accepts an external 8 kHz clock and will produce a number of common communication clock frequencies.
The 8 kHz input clock does not need to have a 50% duty cycle; a “high” or “on” pulse as narrow as 10 ns is acceptable.
Buffer Mode
Unlike the other two modes that accept only a single specified input frequency, Buffer Mode will accept a wider range of
input clocks. The input jitter is attenuated and the outputs on CLK and CLK/2 also provide the option of getting x1, x2, x4, or
1/2 of the input frequency. For example, this mode can be used to remove the jitter from a 27 MHz clock, generating
low-jitter 27 MHz and 13.5 MHz outputs.
IDT® 3.3 VOLT COMMUNICATIONS CLOCK PLL
22 - 36
11 - 18
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
MK2049-36
3.3 VOLT COMMUNICATIONS CLOCK PLL
ICLK
ICLK
Number
FS3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
Pin
FS3
19
20
1
1
FS2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
FS2
1
1
Name
RES
Pin
FS0
FS1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
FS1
1
1
FS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Type
Input
Pin
-
FS0
0
1
22.368
17.184
16.384
14.352
18.528
12.352
12.288
16.384
CLK/2
1.544
2.048
77.76
TEST
TEST
7.68
Connect a 10-200k resistor to ground. Contact IDTfor recommended value
for your application.
Frequency select 0. Determines CLK input/outputs per table on page 3.
Internal pull-up resistor.
2*ICLK
ICLK/2
CLK/2
44.736
34.368
155.52
32.768
28.704
37.056
24.704
24.576
32.768
3.088
4.096
TEST
15.36
TEST
CLK
4*ICLK
ICLK
CLK
3
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
8 kHz
TEST
8 kHz
8 kHz
8 kHz
TEST
8 kHz
8 kHz
8k
Pin Description
N/A
N/A
8k
Used (MHz)
Crystal
12.352
12.288
11.184
11.456
16.384
14.352
18.528
24.704
24.576
12.288
TEST
TEST
19.44
15.36
Crystal
ICLK/2
ICLK
TEST
1544
1536
1398
1432
2430
2048
1794
2316
3088
1920
1344
3072
1536
N
N
3
3
VCXO AND SYNTHESIZER
MK2049-36
REV G 051310