Page 1 of 12 013101
FEATURES
• Pin Compatible to LXP600ASE, LXP602SE,
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
• 8 kHz frequency locked output for all modes of
operation
• No external components required
• 16-pin SOIC
ORDERING INFORMATION
DS21600SN 16–pin SOIC (–40°C to +85°C)
DS21600N 8-pin DIP (–40°C to +85°C)
DS21602SN 16–pin SOIC (–40°C to +85°C)
DS21602N 8-pin DIP (–40°C to +85°C)
DS21604SN 16–pin SOIC (–40°C to +85°C)
DS21604N 8-pin DIP (–40°C to +85°C)
FREQUENCY CONVERSIONS (M Hz)
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 multi-rate clock adapters, which convert between E-carrier and
T-carrier clocks rates. These devices are available in 16 pin SOIC 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 to the LXP600A, LXP602 and LXP604 and operate from a single 5V supply. All modes of
operation include a standard 8kHz output.
DALLAS
DS2160x
DS2160X
Clock Rate Adapte
r
www.dalsemi.com
DS2160x
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TABLE OF CONTENTS
1. REVISION HISTORY............................................................................................... 4
2. FUNCTIONAL DESCRIPTION .............................................................................. 5
2.1 PIN FUNCTION DESCRIPTION................................................................................... 5
3. OPERATION.............................................................................................................. 8
3.1 MODE SELECT......................................................................................................... 8
3.2 FRAME SYNC INPUT................................................................................................ 8
4. OUTPUT JITTER...................................................................................................... 8
4.1 JITTER TRANSFER.................................................................................................... 9
PRELIMINARY DATA NOT AVAILABLE................................................................................ 1
5. OPERATING PARAMETERS............................................................................... 10
5.1 TIMING.................................................................................................................. 11
6. PACKAGE SPECIFICATIONS............................................................................. 12
DS2160x
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LIST OF TABLES
Table 2-1 PIN DESCRIPTION SORTED BY PIN NUMBER...........................................7
Table 2-2 PIN NAME CROSS REFERENCE TO LXP60x...............................................7
Table 3-1 FREQUENCY CONVERSIONS (MHz)............................................................8
Table 4-1 OUTPUT JITTER SPECIFICATIONS, CLKOUT1 = 1.544 MHz....................8
Table 4-2 OUTPUT JITTER SPECIFICATIONS, CLKOUT1 = 2.048 MHz....................9
Table 5-1 AC TIMING ..................................................................................................... 11
LIST OF FIGURES
Figure 2-1 BLOCK DIAGRAM OF THE DS2160x...........................................................5
Figure 6-1 PACKAGE OUTLINE SOIC 16 PIN 0.300” BODY......................................12
DS2160x
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1. REVISION HISTORY
DATE COMMENTS
8-21-00 Preliminary release
8-31-00 Added package specifications
9-01-00 Correct operating voltage range
DS2160x
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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 is also available on CLKOUT2. Additionally, an 8 kHz clock locked to CLKIN and
SYNCIN (if present) is always available at the SYNCOUT pin. The selection of clock rate conversions is
controlled by the SEL pin.
Figure 2-1 BLOCK DIAGRAM OF THE DS2160x
2.1 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.
Signal Name: SYNCOUT
Signal Description: Synchronization Output
ANALOG
PLL
OUTPUT
DIVIDER
FRAME SYN C
GENERATOR
CLKIN
SEL
SYNCIN
CLKOUT2
CLKOUT1
SYNCOUT
FEEDBACK
CIRCUIT
DS2160x
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Signal Type: Output
An 8kHz output that will be synchronized to the clock outputs and SYNCIN (if present).
Signal Name: VDD
Signal Description: Positive Supply
Signal Type: Supply
5.00 volts +/-5%
Signal Name: VSS
Signal Description: Signal Ground
Signal Type: Supply
Ground
DS2160x
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Table 2-1 PIN DESCRI PTION SORTED BY PIN NUMBER
PIN # PIN NAME TYPE DESCRIPTION
1 N/C - NO CONNECT
2 SYNCOUT O Synchronization Pulse Output
3 N/C - NO CONNECT
4 CLKOUT2 O Clock 2 Output
5 CLKIN I Clock Input
6 N/C - NO CONNECT
7 CLKOUT1 O Clock 1 Output
8 N/C - NO CONNECT
9 VSS - Ground
10 N/C - NO CONNECT
11 N/C - NO CONNECT
12 SEL I Clock Mode Select
13 N/C - NO CONNECT
14 SYNCIN I Synchronization Pulse Input
15 N/C - NO CONNECT
16 VDD - Positive supply
Table 2-2 PIN NAME CROSS-REFERENCE TO LXP60x
PIN # DS21600S
DS21602S
Ds21604S
LXP600ASE
LXP602SE
LXP604SE
DESCRIPTION
1 N/C N/C NO CONNECT
2 SYNCOUT FSO Synchronization Pulse Output
3 N/C N/C NO CONNECT
4 CLKOUT2 HFO Clock 2 Output
5 CLKIN CLKI Clock Input
6 N/C N/C NO CONNECT
7 CLKOUT1 CLKO Clock 1 Output
8 N/C N/C NO CONNECT
9 VSS GND Ground
10 N/C N/C NO CONNECT
11 N/C N/C NO CONNECT
12 SEL SEL Clock Mode Select
13 N/C N/C NO CONNECT
14 SYNCIN FSI Synchronization Pulse Input
15 N/C N/C NO CONNECT
16 VDD VCC Positive supply
DS2160x
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3. OPERATION
3.1 MODE SELECT
The SEL pin is used to select the operating frequencies. Table 3-1 shows the SEL state for the various
operating modes of the DS21600, DS21602 and DS21604.
Table 3-1 FREQUENCY CONVERSIONS (M Hz)
SEL CLKIN CLKOUT1 CLKOUT2
DS21600 0
11.544
2.048 2.048
1.544 6.144
6.176
DS21602 0
11.544
2.048 2.048
1.544 8.192
6.176
DS21604 0
11.544
4.096 4.096
1.544 8.192
6.176
3.2 FRAM E SYNC INPUT
In all cases, CLKOUT1 and CLKOUT2 are frequency locked to CLKIN. When SYNCIN is asserted,
CLKOUT1, CLKOUT2 and SYNCOUT are phased locked to SYNCIN. It will take a maximum of
500ms for this alignment to occur after the first instance of SYNCIN.
SYNCIN should be tied low when not used
4. OUTPUT JITTER
In 2.048 MHz or 4.096 MHz to 1.544 MHz conversions (SEL = 1) the CLKOUT1 and CLKOUT2
outputs will preform to the jitter specifications shown in Table 4-1. In this mode of operation the
DS2160x will meet the requirements of AT&T specirfication TR62411.
Table 4-1 OUTPUT JITTER SPECIFICATIONS, CLKOUT1 = 1.544 MHz
FREQUENCY BAND TR62411
SPECIFICATION TYPICAL MAX UNIT
No Bandlimiting 0.050 0.020 UIpp
10 Hz to 40 kHz 0.025 0.010 UIpp
8 kHz to 40 kHz 0.025 0.012 UIpp
NOTE:
CLKIN = 2.048 MHz or 4.096 MHz
DS2160x
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In 1.544 MHz to 2.048 MHz or 4.096 MHz conversions (SEL = 0) the CLKOUT1 and CLKOUT2
outputs will perform to the jitter specifications shown in Table 4-2. . In this mode of operation the
DS2160x will meet the requirements of ITU Recomendation G.823.
Table 4-2 OUTPUT JITTER SPECIFICATIONS, CLKOUT1 = 2.048 MHz
FREQUENCY BAND G.823 SPECIFICATION TYPICAL MAX UNIT
20 Hz to 100 kHz 0.025 0.010 UIpp
18 kHz to 100 kHz 0.025 0.012 UIpp
NOTE:
CLKIN = 1.544 MHz
4.1 JITTER TRANSFER
PRELIMINARY DATA NOT YET AVAI LABLE
DS2160x
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5. OPERATING PARAMETERS
ABSOLUTE MAXIMUM RATINGS*
Voltage on Any Pin Relative to Ground –1.0V to +6.0V
Operating Temperature for DS21600SN, DS21602SN, DS21604SN –40°C to +85°C
Storage Temperature –55°C to +125°C
* This is a stress rating only and functional operation of the device at these or any other conditions above
those indicated in the operation sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods of time may affect reliability.
RECOMMENDED DC
OPERATING CONDI TIONS (-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 1
CAPACITANCE (t
A
=25°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Input Capacitance CIN 5pF
Output Capacitance COUT 7pF
DC CHARACTERISTICS (-40°C to +85°C; VDD = 5.0V ± 5%)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Supply Current @ 5V IDD 8mA3
Input Leakage IIL –1.0 +1.0 µA2
Output Leakage ILO 1.0 µA
Output Current (2.4V) IOH –1.0 mA
Output Current (0.4V) IOL +4.0 mA
NOTES:
1. Applies to VDD.
2. 0.0V < VIN < VDD.
3. Outputs open
DS2160x
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5.1 TIMING
Table 5-1 AC TIMI NG
PARAMETER SYMBOL MIN TYPICAL MAX UNIT
Capture range on CLKIN +/- 10000 ppm
Lock Range on CLKIN +/- 10000 ppm
CLKIN duty cycle 35 65 %
SYNCIN setup to CLKIN rising tSU ns
SYNCIN hold after CLKIN rising tHD ns
SYNCIN pulse width tPW ns
CLKOUT1 delay from CLKIN
rising tDns
SYNCOUT pulse width tSPW CLKOUT1 period ns
CLKOUT1, CLKOUT2,
SYNCOUT rise/fall time 40 ns
CLKIN, SYNCIN rise/fall time 40 ns
CLKIN
SYNCIN
CLKOUT1
tSU tHD
tPW
tD
CLKOUT2
SYNCOUT tSPW
DS2160x
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6. PACKAGE SPECIFICATIONS
Figure 6-1 PACKAGE OUTLINE SOIC 16 PIN 0.300” BODY
