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8T49N028 Datasheet(PDF) 4 Page - Integrated Device Technology

Part # 8T49N028
Description  Fourth Generation FemtoClock NG PLL technology
Download  36 Pages
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

8T49N028 Datasheet(HTML) 4 Page - Integrated Device Technology

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REVISION 1 10/16/14
4
FEMTOCLOCK® NG CRYSTAL-TO-3.3V, 2.5V MULTIPLE FREQUENCY
CLOCK GENERATOR W/FANOUT BUFFER
8T49N028 DATA SHEET
Table 2. Pin Characteristics
Frequency Configuration
Table 3A. Frequency Configuration Examples
NOTE:
Each device supports four output frequencies (with related input or crystal value) as selected from this Register Settings Table.
NOTE:
XTAL operation: Using divA fOUT = fREF * PS * [M / (NA x PNA)].
Using divB fOUT = fREF / P * PS * [M / (NA x PNA)].
Using divB fOUT = fREF / P * PS * M / NB.
Symbol
Parameter
Test Conditions
Minimum
Typical
Maximum
Units
CIN
Input Capacitance
3.5
pF
RPULLDOWN
Input Pulldown Resistor
51
k
RPULLUP
Input Pullup Resistor
51
k
ROUT
Output Impedance
LOCK
VCCO_A = VCCO_B = VCCO_C =
VCCO_D = 3.465V
22
VCCO_A = VCCO_B = VCCO_C =
VCCO_D = 2.625V
27
divA
Frequency
(MHz)
divB
Frequency
(MHz)
Input
Frequency
(MHz)
Input Clock
Divider
P
Input Clock
Prescaler
PS
Feedback
Divider
M
Output
Divider A
PNA x NA
Output
Divider B
NB
VCO
Frequency
(MHz)
100.00
120.00
25.00
1
x2
48
24
20
2400.00
100.00
125.00
25.00
1
x2
50
25
20
2500.00
100.00
156.25
25.00
1
x2
50
25
16
2500.00
100.00
150.00
25.00
1
x2
48
24
16
2400.00
100.00
250.00
25.00
1
x2
50
25
10
2500.00
100.00
312.50
25.00
1
x2
50
25
8
2500.00
100.00
400.00
25.00
1
x2
48
24
6
2400.00
100.00
500.00
25.00
1
x2
50
25
5
2500.00
100.00
625.00
25.00
1
x2
50
25
4
2500.00
125.00
75.00
25.00
1
x1
90
18
30
2250.00
125.00
156.25
25.00
1
x2
50
20
16
2500.00
125.00
187.50
25.00
1
x1
90
18
12
2250.00
125.00
200.00
25.00
1
x2
40
16
10
2000.00
125.00
250.00
25.00
1
x2
40
16
8
2000.00
125.00
312.50
25.00
1
x2
50
20
8
2500.00
125.00
400.00
25.00
1
x2
40
16
5
2000.00
125.00
500.00
25.00
1
x2
50
20
5
2500.00
125.00
625.00
25.00
1
x2
50
20
4
2500.00
30.72
122.88
19.20
1
x2
64
80
20
2457.60
30.72
153.60
19.20
1
x2
64
80
16
2457.60
122.88
153.60
19.20
1
x2
64
20
16
2457.60
122.88
491.52
19.20
1
x2
64
20
5
2457.60
153.60
491.52
19.20
1
x2
64
16
5
2457.60
155.52
622.08
19.44
1
x2
64
16
4
2488.32
19.20
153.60
30.72
1
x2
40
128
16
2457.60
153.60
491.52
30.72
1
x2
40
16
5
2457.60


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