DS21604 Maxim Integrated Products, DS21604 Datasheet - Page 4

• Manufacturer Part Number: DS21604
• Description: (DS21600 - DS21604) 3.3V/5V Clock Rate Adapter
• Manufacturer: Maxim Integrated Products

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2. FUNCTIONAL DESCRIPTION
A clock input at CLKIN is converted to an alternate clock rate available on CLKOUT1. A higher multiple-rate clock
also is available on CLKOUT2. Additionally, an 8kHz clock locked to CLKIN is always available at the SYNCOUT
pin. The SEL pin controls clock-rate conversion selection.
2.1 Mode Select
The SEL pin is used to select the operating frequencies.
modes of the DS21600, DS21602, and DS21604.
Table 2-A. Frequency Conversions (MHz)
2.2 Frame-Sync Input
In all cases, CLKOUT1 and CLKOUT2 are frequency-locked to CLKIN. CLKOUT1, CLKOUT2, and SYNCOUT are
phased-locked to SYNCIN when SYNCIN is asserted. The signal applied to SYNCIN can be 8kHz or some integer
subrate such as 1kHz, 2kHz, or 4kHz. Phase synchronization occurs within a maximum of 50ms when SYNCIN is
8kHz.
3. OUTPUT JITTER
Table 3-A
and 1.544MHz to 2.048MHz (or 4.096MHz) conversions (SEL = 0).
Table 3-A. Output Jitter Specifications
DS21600
DS21602
DS21604
2.048 or
CLKIN
(MHz)
1.544
4.096
PART
shows the output jitter specifications for 2.048MHz (or 4.096MHz) to 1.544MHz conversions (SEL = 1)
CLKOUT1
(MHz)
2.048
1.544
SEL
0
1
0
1
0
1
No bandlimiting
CLKIN
18kHz–100kHz
1.544
2.048
1.544
2.048
1.544
4.096
FREQUENCY
20Hz–100kHz
10Hz–40kHz
8kHz–40kHz
BAND
CLKOUT1
2.048
1.544
2.048
1.544
4.096
1.544
SPECIFICATION
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TR62411
TR62411
TR62411
4 of 13
G.823
G.823
CLKOUT2
DS21600/DS21602/DS21604 3.3V/5V Clock Rate Adapter
Table 2-A
6.144
6.176
8.192
6.176
8.192
6.176
shows the SEL state for the various operating
VALUE
1.500
0.200
0.050
0.025
0.025
0.018
0.012
0.010
0.005
0.006
TYP
0.035
0.025
0.020
0.010
0.012
MAX
UNITS
UI
UI
UI
UI
UI
P-P
P-P
P-P
P-P
P-P