DS21600/2/4 Clock Rate Adapter www.maxim-ic.com 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 SOIC and 8-pin DIP DALLAS DS2160x ORDERING INFORMATION DS21600SN DS21600N DS21602SN DS21602N DS21604SN DS21604N 16-Pin SOIC 8-Pin DIP 16-Pin SOIC 8-Pin DIP 16-Pin SOIC 8-Pin DIP (-40°C to +85°C) (-40°C to +85°C) (-40°C to +85°C) (-40°C to +85°C) (-40°C to +85°C) (-40°C to +85°C) 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 that 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 operation modes include a standard 8kHz output. 1 of 16 092801 DS21600/2/4 TABLE OF CONTENTS FUNCTIONAL DESCRIPTION......................................................................................4 PIN FUNCTION DESCRIPTION ..............................................................................................5 OPERATION .....................................................................................................................7 MODE SELECT ...................................................................................................................7 FRAME SYNC INPUT ...........................................................................................................7 OUTPUT JITTER .............................................................................................................7 JITTER TRANSFER ..............................................................................................................8 OPERATING PARAMETERS ........................................................................................9 AC TIMING ......................................................................................................................10 PACKAGE SPECIFICATIONS.....................................................................................14 REVISION HISTORY………………………………………………………………….16 2 of 16 DS21600/2/4 LIST OF TABLES Table 1 PIN DESCRIPTION SORTED BY PIN NUMBER.............................................. 6 Table 2 PIN NAME CROSS REFERENCE TO LXP60x.................................................. 6 Table 3 FREQUENCY CONVERSIONS (MHz)............................................................... 7 Table 4 OUTPUT JITTER SPECIFICATIONS ................................................................. 7 LIST OF FIGURES Figure 1 DS2160x BLOCK DIAGRAM .................................................. …..………….4 Figure 2-1 NOMINAL JITTER TRANSFER for 2.048MHz to 1.544MHz CONVERSION8 Figure 2-2 NOMINAL JITTER TRANSFER for 1.544MHz to 2.048MHz CONVERSION8 Figure 3-1 DS21600 and DS21602 HIGH to LOW FREQUENCY CONVERSION FRAME SYNC ALIGNMENT ............................................................................................................ 11 Figure 3-2 DS21604 HIGH to LOW FREQUENCY CONVERSION FRAME SYNC ALIGNMENT .................................................................................................................................... 11 Figure 3-3 DS21600 LOW to HIGH FREQUENCY CONVERSION FRAME SYNC ALIGNMENT .................................................................................................................................... 12 Figure 3-4 DS21602 LOW to HIGH FREQUENCY CONVERSION FRAME SYNC ALIGNMENT .................................................................................................................................... 12 Figure 3-5 DS21604 LOW to HIGH FREQUENCY CONVERSION FRAME SYNC ALIGNMENT .................................................................................................................................... 13 Figure 4 PACKAGE OUTLINE SOIC 16-PIN 0.300" BODY ..................................... 14 Figure 5 PACKAGE OUTLINE 8-PIN DIP (300-MIL)................................................ 15 3 of 16 DS21600/2/4 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 controlls clock rate conversion selection. DS2160x BLOCK DIAGRAM Figure 1 CLKOUT2 CLKIN ANALOG PLL FEEDBACK CIRCUIT OUTPUT DIVIDER SEL FRAME SYNC GENERATOR SYNCIN 4 of 16 CLKOUT1 SYNCOUT DS21600/2/4 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 Signal Type: Output An 8kHz output that can be synchronized to the clock outputs. Signal Name: Signal Description: Signal Type: 5.00V ±5% VDD Positive Supply Supply Signal Name: Signal Description: Signal Type: Ground VSS Signal Ground Supply 5 of 16 DS21600/2/4 PIN DESCRIPTION SORTED BY PIN NUMBER Table 1 PIN # 16-PIN SOIC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PIN # 8-PIN DIP 1 2 3 4 5 6 7 8 PIN NAME TYPE DESCRIPTION N/C SYNCOUT N/C CLKOUT2 CLKIN N/C CLKOUT1 N/C VSS N/C N/C SEL N/C SYNCIN N/C VDD O O I O I I - 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 PIN NAME CROSS-REFERENCE TO LXP60x Table 2 DS21600 DS21602 DS21604 SYNCOUT CLKOUT2 CLKIN CLKOUT1 VSS SEL SYNCIN N/C VDD LXP600A LXP602 LXP604 FSO HFO CLKI CLKO GND SEL FSI N/C VCC DESCRIPTION Synchronization Pulse Output Clock 2 Output Clock Input Clock 1 Output Ground Clock Mode Select Synchronization Pulse Input NO CONNECT Positive Supply 6 of 16 DS21600/2/4 OPERATION Mode Select The SEL pin is used to select the operating frequencies. Table 3 shows the SEL state for the various operating modes of the DS21600, DS21602, and DS21604. FREQUENCY CONVERSIONS (MHz) Table 3 DS21600 DS21602 DS21604 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. CLKOUT1, CLKOUT2, and SYNCOUT are phased-locked to SYNCIN when SYNCIN is asserted. It will take a maximum of 100ms for this alignment to occur after the first instance of SYNCIN. SYNCIN should be tied low when not used. OUTPUT JITTER The output jitter specifications are shown in Table 4 for 2.048MHz (or 4.096MHz) to 1.544MHz conversions (SEL = 1) and 1.544MHz to 2.048MHz (or 4.096MHz) conversions (SEL = 0). OUTPUT JITTER SPECIFICATIONS Table 4 CLKIN CLKOUT1 FREQUENCY BAND SPECIFICATION SPEC. VALUE TYPICAL MAX UNITS 1.544MHz 2.048MHz 20Hz to 100kHz G.823 1.500 0.012 0.035 UI pp 18kHz to 100kHz G.823 0.200 0.008 0.025 UI pp No bandlimiting TR62411 0.050 0.002 0.020 UI pp 10Hz to 40kHz TR62411 0.025 0.001 0.010 UI pp 8kHz to 40kHz TR62411 0.025 0.001 0.012 UI pp 2.048MHz or 4.096MHz 1.544MHz 7 of 16 DS21600/2/4 Jitter Transfer Jitter transfer for 2.048MHz to 1.544MHz conversion and vice versa are shown in Figure 2-1 and Figure 2-2. NOMINAL JITTER TRANSFER FOR 2.048MHz TO 1.544MHz CONVERSION Figure 2-1 1.600 Jitter Gain (ns/ns) 1.400 1.200 1.000 0.800 0.600 0.400 0.200 100 90 80 70 60 50 40 30 20 10 0 0.000 Jitter Frequency (KHz) NOMINAL JITTER TRANSFER FOR 1.544MHz TO 2.048MHz CONVERSION Figure 2-2 2 .0 0 0 1 .6 0 0 1 .2 0 0 0 .8 0 0 0 .4 0 0 0 .0 0 0 J itte r F r e q u e n c y (K H z ) 8 of 16 DS21600/2/4 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 -40°C to +85°C -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 CONDITIONS PARAMETER Logic 1 Logic 0 Supply for 5V Operation SYMBOL VIH VIL VDD MIN 2.0 -0.3 4.75 TYP MIN TYP 5 DC CHARACTERISTICS PARAMETER Supply Current @ 5V Input Leakage Output Leakage Output Current (2.4V) Output Current (0.4V) SYMBOL IDD IIL ILO IOH IOL -1.0 -1.0 +4.0 NOTES: 1. 0V < VIN < VDD. 2. Outputs open. 9 of 16 MAX 5.5 +0.8 5.25 (-40°C to +85°C) UNITS V V V NOTES (-40°C to +85°C; VDD = 5.0V ± 5%) MAX 8 +1.0 1.0 UNITS mA mA mA mA mA NOTES 2 1 DS21600/2/4 AC TIMING PARAMETER Capture Range on CLKIN Lock Range on CLKIN CLKIN Duty Cycle SYNCIN Setup to CLKIN Rising SYNCIN Hold After CLKIN Rising SYNCIN Pulse Width SYMBOL - MIN ±10,000 ±10,000 35 TYPICAL - MAX 65 UNIT ppm ppm % tSU 46 - - ns tHI 30 - - ns tPW 76 - CLKIN period ns CLKOUT1 Delay from CLKIN Rising CLKOUT1 Duty Cycle tD -15 0 +15 ns CD 49 - % SYNCOUT Pulse Width tSPW - - 51 CLKOUT1 period tDF -5 - 30 ns tDH -15 0 +15 ns tRF - - 40 ns tRF - - 40 ns SYNCOUT Delay from CLKOUT2 CLKOUT1 Delay from CLKOUT2 Rise/Fall Time on CLKIN, SYNCIN Rise/Fall Time on CLKOUT, SYNCOUT, CLKOUT2 with a 25pF Load 1. Guaranteed by design 10 of 16 NOTES 1 1 1 ns 1 DS21600/2/4 DS21600 AND DS21602 HIGH TO LOW FREQUENCY CONVERSION FRAME SYNC ALIGNMENT Figure 3-1 CLKIN (2.048MHz) tSU SYNCIN tHI tPW CLKOUT1 (1.544MHz) tD SYNCOUT tDH tSPW tDF . CLKOUT2 (6.176MHz) DS21604 HIGH TO LOW FREQUENCY CONVERSION FRAME SYNC ALIGNMENT Figure 3-2 CLKIN (4.096MHz) tSU tHI SYNCIN CLKOUT1 (1.544MHz) SYNCOUT tPW tD tDH tSPW tDF CLKOUT2 (6.176MHz) 11 of 16 DS21600/2/4 DS21600 LOW TO HIGH FREQUENCY CONVERSION FRAME SYNC ALIGNMENT Figure 3-3 CLKIN (1.544MHz) tSU tHI tPW SYNCIN tD CLKOUT1 (2.048MHz) tDH tSPW SYNCOUT tDF CLKOUT2 (6.144MHz) DS21602 LOW TO HIGH FREQUENCY CONVERSION FRAME SYNC ALIGNMENT Figure 3-4 CLKIN (1.544MHz) tSU SYNCIN tHI tPW CLKOUT1 (2.048MHz) SYNCOUT tD tDH tSPW tDF CLKOUT2 (8.192MHz) 12 of 16 DS21600/2/4 DS21604 LOW TO HIGH FREQUENCY CONVERSION FRAME SYNC ALIGNMENT Figure 3-5 CLKIN (1.544MHz) tSU SYNCIN tHI tPW tDH CLKOUT1 (4.096MHz) tD SYNCOUT TSPW tDF 13 of 16 DS21600/2/4 PACKAGE SPECIFICATIONS PACKAGE OUTLINE SOIC 16-PIN 0.300” BODY Figure 4 14 of 16 DS21600/2/4 PACKAGE OUTLINE 8-PIN DIP (300-MIL) Figure 5 15 of 16 DS21600/2/4 REVISION HISTORY 1. 2. 3. 4. 5. Preliminary release, 082100. Added package specifications, 083100. Correct operating voltage range, 090100. Added mechanical drawing for DIP package, 011101. Added jitter specifications and pin list for all packages; added timing diagrams, 092801. 16 of 16