DS21600SN ,3.3 V/5 V clock rate adapterBlock Diagram........3 Figure 3-1. Nominal Jitter Transer for 2.048MHz to 1.544MHz Conversion ..... ..
DS21600SN+ ,3.3V/5V Clock Rate AdapterBlock Diagram...3 Figure 3-1. Nominal Jitter Transer for 2.048MHz to 1.544MHz Conversion5 Figure 3- ..
DS21602N ,3.3 V/5 V clock rate adapterPin Description........3 Table 1-B. Pin Name Cross-Reference to LXP60x .......3 Table 2-A. Frequenc ..
DS21602N+ ,3.3V/5V Clock Rate AdapterPIN DESCRIPTION ...... 3 1.1 PIN NAME CROSS-REFERENCE TO LXP60X . 3 2.
DS21602SN ,3.3 V/5 V clock rate adapter DS21600/DS21602/DS21604 3.3V/5V Clock Rate Adapter
DS21602SN+ ,3.3V/5V Clock Rate AdapterPin Description PIN NAME TYPE FUNCTION DIP SO 1, 3, 6, 8, 10, — N.C. — No Connect 11, 13, 15 Synchr ..
DS21600N-DS21600SN-DS21602N-DS21602SN
3.3 V/5 V clock rate adapter
GENERAL DESCRIPTION The DS21600/DS21602/DS21604 are multiple-rate clock adapters that convert between E-carrier and T-carrier clocks rates. A T1 or E1 clock output,
CLKOUT1, is available, along with a higher multiple rate clock output, CLKOUT2. CLKOUT1 and
CLKOUT2 are frequency locked to the clock input CLKIN. The clock outputs, along with frame-sync output, can be phase-aligned to a frame-sync input.
The devices are fully compatible with the LXP600A, LXP602, and LXP604, and operate from either a 5V
or 3.3V supply. All operation modes include a standard 8kHz output.
The DS21600/DS21602/DS21604 are available in 16-pin SO, and are rated for industrial temperatures.
ORDERING INFORMATION FREQUENCY CONVERSIONS (MHz)
FEATURES Direct Drop-In Replacement for LXP600ASE, LXP602SE, and LXP604SE Converts E-Carrier Clock Rates to T-Carrier
Clock Rates Converts T-Carrier Clock Rates to E-Carrier
Clock Rates 3.3V or 5V Supply Low Jitter Output Multiple Output Clocks Synchronized to Input Clock 8kHz Frequency-Locked Output for All Operation Modes No External Components Required 16-Pin SO and 8-Pin DIP Industrial Temperature Range: -40°C to +85°C
PIN CONFIGURATION
DS21600/DS21602/DS21604
DS21600/DS21602/DS21604 3.3V/5V Clock Rate Adapter
TABLE OF CONTENTS
1. PIN DESCRIPTION......................................................................................................................3 1.1 PIN NAME CROSS-REFERENCE TO LXP60X....................................................................................................3
2. FUNCTIONAL DESCRIPTION......................................................................................................4 2.1 MODE SELECT................................................................................................................................................4
2.2 FRAME SYNC INPUT........................................................................................................................................4
3. OUTPUT JITTER..........................................................................................................................4 3.1 JITTER TRANSFER..........................................................................................................................................5
4. OPERATING PARAMETERS.......................................................................................................7
5. PACKAGE INFORMATION........................................................................................................11
6. REVISION HISTORY..................................................................................................................13
LIST OF FIGURES Figure 1-1. Block Diagram....................................................................................................................3
Figure 3-1. Nominal Jitter Transer for 2.048MHz to 1.544MHz Conversion..........................................5
Figure 3-2. Nominal Jitter Transfer for 1.544MHz to 2.048MHz Conversion.........................................6
Figure 4-1. DS21600/DS21602 High-to-Low Frequency Conversion Frame-Sync Alignment...............8
Figure 4-2. DS21604 High-To-Low Frequency Conversion Frame-Sync Alignment..............................9
Figure 4-3. DS21600 Low-to-High Frequency Conversion Frame-Sync Alignment...............................9
Figure 4-4. DS21602 Low-to-High Frequency Conversion Frame-Sync Alignment.............................10
Figure 4-5. DS21604 Low-to-High Frequency Conversion Frame-Sync Alignment.............................10
LIST OF TABLES Table 1-A. Pin Description....................................................................................................................3
Table 1-B. Pin Name Cross-Reference to LXP60x...............................................................................3
Table 2-A. Frequency Conversions (MHz)............................................................................................4
Table 3-A. Output Jitter Specifications..................................................................................................4
DS21600/DS21602/DS21604 3.3V/5V Clock Rate Adapter
1. PIN DESCRIPTION
Table 1-A. Pin Description
1.1 Pin Name Cross-Reference to LXP60X
Table 1-B. Pin Name Cross-Reference to LXP60x
Figure 1-1. Block Diagram DS21600/DS21602/DS21604 3.3V/5V Clock Rate Adapter
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. Table 2-A shows the SEL state for the various operating
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 shows the output jitter specifications for 2.048MHz (or 4.096MHz) to 1.544MHz conversions (SEL = 1)
and 1.544MHz to 2.048MHz (or 4.096MHz) conversions (SEL = 0).
Table 3-A. Output Jitter Specifications DS21600/DS21602/DS21604 3.3V/5V Clock Rate Adapter
3.1 Jitter Transfer Figure 3-1 and Figure 3-2 show jitter transfer for 2.048MHz-to-1.544MHz conversions and vice versa.
Figure 3-1. Nominal Jitter Transfer for 2.048MHz-to-1.544MHz Conversion DS21600/DS21602/DS21604 3.3V/5V Clock Rate Adapter
Figure 3-2. Nominal Jitter Transfer for 1.544MHz-to-2.048MHz Conversion
DS21600/DS21602/DS21604 3.3V/5V Clock Rate Adapter
4. OPERATING PARAMETERS
ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground -1.0V to +6.0V
Operating Temperature Range for DS21600SN, DS21602SN, DS21604SN -40°C to +85°CStorage Temperature Range -55°C to +125°CSoldering Temperature See IPC/JEDEC J-STD-020
Specification
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications
is not implied. Exposure to absolute maximum rating conditions for extended periods can affect device reliability.
RECOMMENDED DC OPERATING CONDITIONS (TA = -40°C to +85°C)
DC CHARACTERISTICS (VDD = 3.3V/5V � 5%, TA = -40°C to +85°C.)
Note 1: 100pF load on all outputs.
Note 2: 0V < VIN < VDD.
