MAX3625A Просмотр технического описания (PDF) - Maxim Integrated
Номер в каталоге
Компоненты Описание
производитель
MAX3625A Datasheet PDF : 10 Pages
| |||
Low-Jitter, Precision Clock
Generator with Three Outputs
Table 1. Output Frequency Determination
CRYSTAL OR
CMOS INPUT
FREQUENCY
(MHz)
FEEDBACK
DIVIDER, M
VCO
FREQUENCY
(MHz)
25
25.78125
26.04166
25
625
25
644.53125
24
625
26.5625
24
637.5
OUTPUT
DIVIDER,
NA AND NB
2
4
5
10
4
2
4
5
10
2
4
OUTPUT
FREQUENCY
(MHz)
312.5
156.25
125
62.5
161.132812
312.5
156.25
125
62.5
318.75
159.375
APPLICATIONS
Ethernet
10Gbps Ethernet
Ethernet
10G Fibre Channel
Table 2. Output Divider Configuration
INPUT
SELA1/SELB1
SELA0/SELB0
0
0
0
1
1
0
1
1
NA/NB DIVIDER
/10
/2
/4
/5
Table 3. PLL Divider Configuration
FB_SEL INPUT
0
1
M DIVIDER
/25
/24
Table 4. Crystal Selection Parameters
PARAMETER SYMBOL MIN
Crystal Oscillation
Frequency
fOSC
24.8
Shunt Capacitance CO
Load Capacitance
CL
Equivalent Series
Resistance (ESR)
RS
Maximum Crystal
Drive Level
TYP
2.0
18
MAX UNITS
27 MHz
7.0 pF
pF
50
300 μW
Figure 2. Crystal Layout
27pF
CRYSTAL
(CL = 18pF)
33pF
X_IN
X_OUT
Figure 3. Crystal, Capacitors Connection
_______________________________________________________________________________________ 7
Share Link: 