1 of 17 032002
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple
revisio ns o f any devi ce may be simultaneo usly avail ab le thr ough va ri ous sa les channe ls. For info rmatio n abo ut de vice err at a,
click here: http://dbserv.maxim-ic.com/errata.cfm.
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
Low jitter output
Multiple output clocks synchronized to input
clock
8kHz frequency-locked output for all modes
of operation
No external components required
16-pin SO and 8-pin DIP
Industrial temperature range: -40°C to +85°C
ORDERING INFORMATION
DS21600SN 16-Pin SO -40°C to +85°C
DS21600N 8-Pin DIP -40°C to +85°C
DS21602SN 16-Pin SO -40°C to +85°C
DS21602N 8-Pin DIP -40°C to +85°C
DS21604SN 16-Pin SO -40°C to +85°C
DS21604N 8-Pin DIP -40°C to +85°C
FREQUENCY CONVERSIONS (M Hz)
PART CLKIN CLKOUT1 CLKOUT2
DS21600 1.544
2.048 2.048
1.544 6.144
6.176
DS21602 1.544
2.048 2.048
1.544 8.192
6.176
DS21604 1.544
4.096 4.096
1.544 8.192
6.176
DESCRIPTION
The DS21600, DS21602, and DS21604 are multiple-rate clock adapters that convert between E-carrier
and T-carrier clocks rates. These devices are available in 16-pin SO and are rated for industrial
temperatures. A T1 or E1 clock output is available, CLKOUT1, along with a higher multiple rate,
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 a single 5V supply. All
operation modes include a standard 8kHz output.
DALLAS
DS2160x
DS21600/2/4
Clock Rate Adap te
r
www.maxim-ic.com
DS21600/2/4
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TABLE OF CONTENTS
1. FUNCTIONAL DESCRIPTION......................................................................................................... 4
1.1 PIN FUNCTION DESCRIPTION............................................................................................................... 5
2. OPERATION.........................................................................................................................................7
2.1 MODE SELECT..................................................................................................................................... 7
2.2 FRAME SYNC INPUT ............................................................................................................................ 7
3. OUTPUT JITTER................................................................................................................................. 7
3.1 JITTER TRANSFER................................................................................................................................8
4. OPERATING PARAMETERS.......................................................................................................... 10
4.1 AC TIMING .......................................................................................................................................11
5. PACKAGE SPECIFICATIONS........................................................................................................ 15
6. REVISION HISTORY ....................................................................................................................... 17
DS21600/2/4
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LIST OF FIGURES
Figure 1-1 DS2160x BLOCK DIAGRAM .......................................................................... …..………….4
Figure 3-1 NOMINAL JITTER TRANSFER for 2.048MHz to 1.544MHz CONVERSION …..…8
Figure 3-2 NOMINAL JITTER TRANSFER for 1.544MHz to 2.048MHz CONVERSION …..…9
Figure 4-1 DS21600 and DS21602 HIGH to LOW FREQUENCY CONVERSION
FRAME SYNC ALIGNMENT.......................................................................................................... 12
Figure 4-2 DS21604 HIGH to LOW FREQUENCY CONVERSION FRAME SYNC ALIGNMENT .. 12
Figure 4-3 DS21600 LOW to HIGH FREQUENCY CONVERSION FRAME SYNC ALIGNMENT.. 13
Figure 4-4 DS21602 LOW to HIGH FREQUENCY CONVERSION FRAME SYNC ALIGNMENT.. 13
Figure 4-5 DS21604 LOW to HIGH FREQUENCY CONVERSION FRAME SYNC ALIGNMENT.. 14
Figure 5-1 PACKAGE OUTLINE 16-PIN SO 0.300" BODY .................................................................15
Figure 5-2 PACKAGE OUTLINE 8-PIN DIP (300MIL)......................................................................... 16
LIST OF TABLES
Table 1-1 PIN DESCRIPTION SORTED BY PIN NUMBER................................................................... 6
Table 1-2 PIN NAME CROSS REFERENCE TO LXP60x....................................................................... 6
Table 2-1 FREQUENCY CONVERSIONS (MHz).................................................................................... 7
Table 3-1 OUTPUT JITTER SPECIFICATIONS ...................................................................................... 7
DS21600/2/4
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1. FUNCTIO NAL 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.
Figure 1-1. DS2160x BLOCK DIAGRAM
ANALOG
PLL
OUTPUT
DIVIDER
FRAME SYN C
GENERATOR
CLKIN
SEL
SYNCIN
CLKOUT2
CLKOUT1
SYNCOUT
FEEDBACK
CIRCUIT
DS21600/2/4
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1.1 PIN FUNCTION DESCRIPTION
Signal Name: CLKIN
Signal Description: Clock Input
Signal Type: Input
Reference Clock Input. CLKOUT1 and CLKOUT2 will be referenced to this clock.
Signal Name: CLKOUT1
Signal Description: Clock Output 1
Signal Type: Output
T1 or E1 carrier clock output referenced to CLKIN.
Signal Name: CLKOUT2
Signal Description: Clock Output 2
Signal Type: Output
T1 or E1 carrier clock output referenced to CLKIN.
Signal Name: SEL
Signal Description: Clock Mode Select
Signal Type: Input
Conversion mode select.
Signal Name: SYNCIN
Signal Description: Synchronization Input
Signal Type: Input
Used to synchronize the clock outputs and SYNCOUT to CLKIN and SYNCIN. SYNCIN should be tied
high or low when not in use.
Signal Name: SYNCOUT
Signal Description: Synchronization Output
Signal Type: Output
An 8kHz output that can be synchronized to the clock outputs.
Signal Name: VDD
Signal Description: Positive Supply
Signal Type: Supply
5V ±5%
Signal Name: VSS
Signal Description: Signal Ground
Signal Type: Supply
Ground
DS21600/2/4
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Table 1-1. PIN DESCRIPTI O N SORTED BY PIN NUMBER
16-PIN SO
PIN NO. 8-PIN DIP
PIN NO. PIN NAME TYPE DESCRIPTION
1 - N/C - NO CONNECT
2 1 SYNCOUT O Synchronization Pulse Output
3 - N/C - NO CONNECT
4 2 CLKOUT2 O Clock 2 Output
5 3 CLKIN I Clock Input
6 - N/C - NO CONNECT
7 4 CLKOUT1 O Clock 1 Output
8 - N/C - NO CONNECT
9 5 VSS - Ground
10 - N/C - NO CONNECT
11 - N/C - NO CONNECT
12 6 SEL I Clock Mode Select
13 - N/C - NO CONNECT
14 7 SYNCIN I Synchronization Pulse Input
15 - N/C - NO CONNECT
16 8 VDD - Positive Supply
Table 1-2. PIN NAME CROSS-REFERENCE TO LXP60x
DS21600
DS21602
DS21604
LXP600A
LXP602
LXP604 DESCRIPTION
SYNCOUT FSO Synchronization Pulse Output
CLKOUT2 HFO Clock 2 Output
CLKIN CLKI Clock Input
CLKOUT1 CLKO Clock 1 Output
VSS GND Ground
SEL SEL Clock Mode Select
SYNCIN FSI Synchronization Pulse Input
N/C N/C NO CONNECT
VDD V
CC Positive Supply
DS21600/2/4
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2. OPERATION
2.1 Mode Select
The SEL pin is used to select the operating frequencies. Table 2-1 shows the SEL state for the various
operating modes of the DS21600, DS21602, and DS21604.
Table 2-1. FREQUENCY CONVERSIONS (M Hz)
SEL CLKIN CLKOUT1 CLKOUT2
DS21600 0
1 1.544
2.048 2.048
1.544 6.144
6.176
DS21602 0
1 1.544
2.048 2.048
1.544 8.192
6.176
DS21604 0
1 1.544
4.096 4.096
1.544 8.192
6.176
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 will occur
within a maximum of 50ms when SYNCIN is 8kHz.
3. OUTPUT JITTER
The output jitter specifications are shown in Table 3-1 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 3-1. OUTPUT JITTER SPECIFICATIONS
CLKIN
(MHz) CLKOUT1
(MHz) FREQUENCY
BAND SPECIFICATION SPEC.
VALUE TYPICAL MAX UNITS
20Hz to 100kHz G.823 1.500 0.018 0.035 UIpp
1.544 2.048
18kHz to 100kHz G.823 0.200 0.012 0.025 UIpp
No bandlimiting TR62411 0.050 0.010 0.020 UIpp
10Hz to 40kHz TR62411 0.025 0.005 0.010 UIpp
2.048
or
4.096 1.544
8kHz to 40kHz TR62411 0.025 0.006 0.012 UIpp
DS21600/2/4
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3.1 Jitter Transfer
Jitter transfer for 2.048MHz to 1.544MHz conversion and vice versa are shown in Figure 3-1 and Figure
3-2.
Figure 3-1. NOMI NAL JITTER TRANSFER FOR 2.048MHz TO 1.544MHz
CONVERSION
Note: The typical peak jitter gain of DS21600/2/4 is about 1.4 for conversion from E1 to T1. The
typical peak jitter gain of the Level One device is about 1.1. However, the jitter gain for the
DS21600/2/4 devices peaks in the 4kHz to 8kHz range, whereas the peak jitter gain for the LXP6xx
devices spans a greater frequency range (20kHz to 40kHz).
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
0 1020304050607080
Jitter Frequency (kHz)
DS21600/2/4
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Figure 3-2. NOMI NAL JITTER TRANSFER FOR 1.544MHz TO 2.048MHz
CONVERSION
Note: The typical peak jitter gain of DS21600/2/4 is about 1.6 for conversion from T1 to E1. The
typical peak jitter gain of the Level One device is about 1.1. However, the jitter gain for the
DS21600/2/4 devices peaks in the 4kHz to 8kHz range, whereas the peak jitter gain for the LXP6xx
devices spans a greater frequency range (20kHz to 40kHz).
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
1.80
2.00
0 5 10 15 20 25 30 35 40
Jitter Frequency (kHz)
Jitter Gain (ns/ns)
DS21600/2/4
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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°C
Storage Temperature Range -55°C to +125°C
* This is a stress rating only and functional operation of the device at these or any other conditions
beyond those indicated in the operation sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods of time can affect reliability.
RECOMMENDED DC OPERATI NG CONDITIONS (-40°C to +85°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Logic 1 VIH 2.0 5.5 V
Logic 0 VIL -0.3 +0.8 V
Supply for 5V Operation VDD 4.75 5 5.25 V
DC CHARACTERISTICS (-40°C to +85°C; VDD = 5.0V ± 5%)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Supply Current at 5V IDD 14 mA 2
Input Leakage IIL -1.0 +1.0 µA 1
Output Leakage ILO 1.0 µA
Output Current (2.4V) IOH -1.0 mA
Output Current (0.4V) IOL +4.0 mA
NOTES:
1) 0V < VIN < VDD.
2) 100pF load on all outputs.
DS21600/2/4
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4.1 AC T IMING
PARAMETER SYMBOL MIN TYP MAX UNITS
Capture Range on CLKIN1 - ±10,000 - - ppm
Lock Range on CLKIN1 - ±10,000 - - ppm
CLKIN Duty Cycle1 - 35 - 65 %
SYNCIN Setup to CLKIN
Rising tSU 46 - - ns
SYNCIN Hold After CLKIN
Rising tHI 30 - - ns
SYNCIN Pulse Width tPW 76 -
CLKIN
period ns
CLKOUT1 Delay from CLKIN
Rising tD -15 0 +15 ns
CLKOUT1 Duty Cycle CD 50 %
SYNCOUT Pulse Width tSPW -
CLKOUT1
period ns
SYNCOUT Delay from
CLKOUT2 tDF -5 - 30 ns
CLKOUT1 Delay from
CLKOUT2 tDH -15 0 +15 ns
Rise/Fall Time on CLKIN,
SYNCIN1 tRF - - 40 ns
Rise/Fall Time on CLKOUT,
SYNCOUT, CLKOUT2 with a
25pF Load tRF - - 40 ns
1. Guaranteed by design
DS21600/2/4
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Figure 4-1. DS21600 AND DS21602 HIGH TO LOW FREQUENCY
CONVERSION FRAME SYNC ALIGNM ENT
.
Figure 4-2. DS21604 HIGH TO LOW FREQUENCY CONVERSION FRAME
SYNC ALI G NMENT
tPW tD
CLKOUT2
(
6.176MHz
)
tDF
tDH
tHI tSU
CLKOUT1
(
1.544MHz
)
SYNCIN
CLKIN
(
2.048MHz
)
SYNCOUT tSPW
SYNCOUT
tDH
tD
tPW
tHI tSU
CLKOUT1
(
1.544MHz
)
SYNCIN
CLKIN
(
4.096MHz
)
tDF
CLKOUT2
(
6.176MHz
)
tSPW
DS21600/2/4
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Figure 4-3. DS21600 LOW TO HIGH FREQUENCY CONVERSION FRAME
SYNC A LIGNMENT
Figure 4-4. DS21602 LOW TO HIGH FREQUENCY CONVERSION FRAME
SYNC ALI G NMENT
tSPW
tDH
tDF
tD
tPW
tSU
CLKOUT2
(
8.192MHz
)
SYNCOUT
CLKOUT1
(2.048MHz)
SYNCIN
CLKIN
(1.544MHz)
tHI
tSPW
tDH
tDF
tD
tPW
tSU
CLKOUT2
(
6.144MHz
)
SYNCOUT
CLKOUT1
(2.048MHz)
SYNCIN
CLKIN
(1.544 MHz)
tHI
DS21600/2/4
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Figure 4-5. DS21604 LOW TO HIGH FREQUENCY CONVERSION FRAME
SYNC ALI G NMENT
tDH
TSPW
tDF
tD
tPW
tSU
SYNCOUT
CLKOUT1
(4.096MHz)
SYNCIN
CLKIN
(1.544MHz)
tHI
CLKOUT2
(8.192MHz)
DS21600/2/4
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5. PACKAGE SPECIFICATIONS
Figure 5-1. PACKAGE OUTLINE 16-PIN SO 0.300” BODY
DS21600/2/4
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Figure 5-2. PACKAGE OUTLINE 8-PIN DIP (300MIL)
DS21600/2/4
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6. REVISION HISTORY
1) Preliminary release, 082100.
2) Added package specifications, 083100.
3) Correct operating voltage range, 090100.
4) Added mechanical drawing for DIP package, 011101.
5) Added jitter specifications and pin list for all packages; added timing diagrams, 092801.
6) Updated jitter specifications, 032002.
