DS2160X Clock Rate Adapter www.dalsemi.com 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 DALLAS DS2160x ORDERING INFORMATION DS21600SN 16-pin SOIC DS21600N 8-pin DIP DS21602SN 16-pin SOIC DS21602N 8-pin DIP DS21604SN 16-pin SOIC DS21604N 8-pin DIP (-40C to +85C) (-40C to +85C) (-40C to +85C) (-40C to +85C) (-40C to +85C) (-40C to +85C) FREQUENCY CONVERSIONS (MHz) DS21600 DS21602 DS21604 CLKIN 1.544 2.048 1.544 2.048 1.544 4.096 CLKOUT1 2.048 1.544 2.048 1.544 4.096 1.544 CLKOUT2 6.144 6.176 8.192 6.176 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. Page 1 of 12 013101 DS2160x 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 Page 2 of 12 DS2160x 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 Page 3 of 12 DS2160x 1. REVISION HISTORY DATE 8-21-00 8-31-00 9-01-00 COMMENTS Preliminary release Added package specifications Correct operating voltage range Page 4 of 12 DS2160x 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 CLKOUT2 ANALOG PLL CLKIN FEEDBACK CIRCUIT OUTPUT DIVIDER SEL FRAME SYNC GENERATOR SYNCIN 2.1 CLKOUT1 SYNCOUT 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: Signal Description: SYNCOUT Synchronization Output Page 5 of 12 DS2160x Signal Type: Output An 8kHz output that will be synchronized to the clock outputs and SYNCIN (if present). Signal Name: Signal Description: Signal Type: 5.00 volts +/-5% VDD Positive Supply Supply Signal Name: Signal Description: Signal Type: Ground VSS Signal Ground Supply Page 6 of 12 DS2160x Table 2-1 PIN DESCRIPTION SORTED BY PIN NUMBER PIN # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PIN NAME N/C SYNCOUT N/C CLKOUT2 CLKIN N/C CLKOUT1 N/C VSS N/C N/C SEL N/C SYNCIN N/C VDD TYPE O O I O I I - DESCRIPTION NO CONNECT Synchronization Pulse Output NO CONNECT Clock 2 Output Clock Input NO CONNECT Clock 1 Output NO CONNECT Ground NO CONNECT NO CONNECT Clock Mode Select NO CONNECT Synchronization Pulse Input NO CONNECT Positive supply Table 2-2 PIN NAME CROSS-REFERENCE TO LXP60x PIN # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DS21600S DS21602S Ds21604S N/C SYNCOUT N/C CLKOUT2 CLKIN N/C CLKOUT1 N/C VSS N/C N/C SEL N/C SYNCIN N/C VDD LXP600ASE LXP602SE LXP604SE N/C FSO N/C HFO CLKI N/C CLKO N/C GND N/C N/C SEL N/C FSI N/C VCC DESCRIPTION NO CONNECT Synchronization Pulse Output NO CONNECT Clock 2 Output Clock Input NO CONNECT Clock 1 Output NO CONNECT Ground NO CONNECT NO CONNECT Clock Mode Select NO CONNECT Synchronization Pulse Input NO CONNECT Positive supply Page 7 of 12 DS2160x 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 (MHz) DS21600 DS21602 DS21604 3.2 SEL 0 1 0 1 0 1 CLKIN 1.544 2.048 1.544 2.048 1.544 4.096 CLKOUT1 2.048 1.544 2.048 1.544 4.096 1.544 CLKOUT2 6.144 6.176 8.192 6.176 8.192 6.176 FRAME 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 No Bandlimiting 10 Hz to 40 kHz 8 kHz to 40 kHz TR62411 SPECIFICATION 0.050 0.025 0.025 TYPICAL NOTE: CLKIN = 2.048 MHz or 4.096 MHz Page 8 of 12 MAX UNIT 0.020 0.010 0.012 UIpp UIpp UIpp DS2160x 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 20 Hz to 100 kHz 18 kHz to 100 kHz G.823 SPECIFICATION 0.025 0.025 TYPICAL MAX 0.010 0.012 NOTE: CLKIN = 1.544 MHz 4.1 JITTER TRANSFER PRELIMINARY DATA NOT YET AVAILABLE Page 9 of 12 UNIT UIpp UIpp DS2160x 5. OPERATING PARAMETERS ABSOLUTE MAXIMUM RATINGS* Voltage on Any Pin Relative to Ground Operating Temperature for DS21600SN, DS21602SN, DS21604SN Storage Temperature -1.0V to +6.0V -40C to +85C -55C to +125C * 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 CONDITIONS PARAMETER Logic 1 Logic 0 Supply for 5V Operation (-40C to +85C) SYMBOL VIH VIL VDD MIN 2.0 -0.3 4.75 TYP SYMBOL CIN COUT MIN TYP 5 7 5 MAX 5.5 +0.8 5.25 UNITS V V V MAX UNITS pF pF CAPACITANCE PARAMETER Input Capacitance Output Capacitance 1 (tA =25C) SYMBOL IDD IIL ILO IOH IOL NOTES (-40C to +85C; VDD = 5.0V 5%) DC CHARACTERISTICS PARAMETER Supply Current @ 5V Input Leakage Output Leakage Output Current (2.4V) Output Current (0.4V) NOTES MIN -1.0 -1.0 +4.0 NOTES: 1. Applies to VDD. 2. 0.0V < VIN < VDD. 3. Outputs open Page 10 of 12 TYP MAX 8 +1.0 1.0 UNITS mA A A mA mA NOTES 3 2 DS2160x 5.1 TIMING Table 5-1 AC TIMING PARAMETER Capture range on CLKIN Lock Range on CLKIN CLKIN duty cycle SYMBOL SYNCIN setup to CLKIN rising SYNCIN hold after CLKIN rising SYNCIN pulse width CLKOUT1 delay from CLKIN rising SYNCOUT pulse width CLKOUT1, CLKOUT2, SYNCOUT rise/fall time CLKIN, SYNCIN rise/fall time tSU tHD tPW tD MIN +/- 10000 +/- 10000 35 CLKIN tHD SYNCIN tPW tD CLKOUT1 SYNCOUT MAX 65 UNIT ppm ppm % ns ns ns ns tSPW tSU TYPICAL tSPW CLKOUT2 Page 11 of 12 CLKOUT1 period 40 ns ns 40 ns DS2160x 6. PACKAGE SPECIFICATIONS Figure 6-1 PACKAGE OUTLINE SOIC 16 PIN 0.300" BODY Page 12 of 12