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 SO and 8-pin DIP Industrial temperature range: -40C to +85C DALLAS DS2160x ORDERING INFORMATION DS21600SN DS21600N DS21602SN DS21602N DS21604SN DS21604N 16-Pin SO 8-Pin DIP 16-Pin SO 8-Pin DIP 16-Pin SO 8-Pin DIP -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C FREQUENCY CONVERSIONS (MHz) PART 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 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. Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales channels. For information about device errata, click here: http://dbserv.maxim-ic.com/errata.cfm. 1 of 17 032002 DS21600/2/4 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 2 of 17 DS21600/2/4 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 3 of 17 DS21600/2/4 1. 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. Figure 1-1. DS2160x BLOCK DIAGRAM CLKOUT2 CLKIN ANALOG PLL FEEDBACK CIRCUIT OUTPUT DIVIDER SEL FRAME SYNC GENERATOR SYNCIN 4 of 17 CLKOUT1 SYNCOUT DS21600/2/4 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: Signal Description: Signal Type: 5V 5% VDD Positive Supply Supply Signal Name: Signal Description: Signal Type: Ground VSS Signal Ground Supply 5 of 17 DS21600/2/4 Table 1-1. PIN DESCRIPTION SORTED BY PIN NUMBER 16-PIN SO PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 8-PIN DIP PIN NO. 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 Table 1-2. PIN NAME CROSS-REFERENCE TO LXP60x 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 17 DS21600/2/4 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 (MHz) 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 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) 1.544 2.048 2.048 or 4.096 1.544 FREQUENCY BAND SPECIFICATION SPEC. VALUE TYPICAL MAX UNITS 20Hz to 100kHz G.823 1.500 0.018 0.035 UIpp 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 8kHz to 40kHz TR62411 0.025 0.006 0.012 UIpp 7 of 17 DS21600/2/4 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. NOMINAL JITTER TRANSFER FOR 2.048MHz TO 1.544MHz CONVERSION 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 0 10 20 30 40 50 60 70 80 Jitter Frequency (kHz) 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). 8 of 17 DS21600/2/4 Figure 3-2. NOMINAL JITTER TRANSFER FOR 1.544MHz TO 2.048MHz CONVERSION 2.00 1.80 Jitter Gain (ns/ns) 1.60 1.40 1.20 1.00 0.80 0.60 0.40 0.20 0.00 0 5 10 15 20 25 30 35 40 Jitter Frequency (kHz) 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). 9 of 17 DS21600/2/4 4. OPERATING PARAMETERS ABSOLUTE MAXIMUM RATINGS* Voltage Range on Any Pin Relative to Ground Operating Temperature Range for DS21600SN, DS21602SN, DS21604SN Storage Temperature Range -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 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 OPERATING CONDITIONS PARAMETER Logic 1 Logic 0 SYMBOL VIH MIN 2.0 VIL -0.3 VDD 4.75 Supply for 5V Operation SYMBOL IDD MIN Input Leakage IIL -1.0 Output Leakage ILO Output Current (2.4V) IOH IOL Output Current (0.4V) 5 MAX 5.5 UNITS V +0.8 V 5.25 V NOTES (-40C to +85C; VDD = 5.0V 5%) DC CHARACTERISTICS PARAMETER Supply Current at 5V TYP (-40C to +85C) -1.0 +4.0 NOTES: 1) 0V < VIN < VDD. 2) 100pF load on all outputs. 10 of 17 TYP MAX 14 UNITS mA NOTES 2 +1.0 A 1 1.0 A mA mA DS21600/2/4 4.1 AC TIMING PARAMETER Capture Range on CLKIN1 Lock Range on CLKIN1 1 SYMBOL - MIN 10,000 TYP - MAX - UNITS ppm - 10,000 - - ppm CLKIN Duty Cycle SYNCIN Setup to CLKIN Rising SYNCIN Hold After CLKIN Rising - 35 - 65 % tSU 46 - - ns tHI 30 - - ns SYNCIN Pulse Width tPW 76 - CLKIN period ns tD -15 0 +15 ns CLKOUT1 Delay from CLKIN Rising CLKOUT1 Duty Cycle CD SYNCOUT Pulse Width tSPW - 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, SYNCIN1 Rise/Fall Time on CLKOUT, SYNCOUT, CLKOUT2 with a 25pF Load 1. Guaranteed by design 11 of 17 50 CLKOUT1 period % ns DS21600/2/4 Figure 4-1. DS21600 AND DS21602 HIGH TO LOW FREQUENCY CONVERSION FRAME SYNC ALIGNMENT CLKIN (2.048MHz) tSU SYNCIN tHI tPW CLKOUT1 (1.544MHz) tD SYNCOUT tDH tSPW tDF . CLKOUT2 (6.176MHz) Figure 4-2. DS21604 HIGH TO LOW FREQUENCY CONVERSION FRAME SYNC ALIGNMENT CLKIN (4.096MHz) tSU tHI SYNCIN CLKOUT1 (1.544MHz) SYNCOUT tPW tD tDH tSPW tDF CLKOUT2 (6.176MHz) 12 of 17 DS21600/2/4 Figure 4-3. DS21600 LOW TO HIGH FREQUENCY CONVERSION FRAME SYNC ALIGNMENT CLKIN (1.544 MHz) tSU tHI tPW SYNCIN tD CLKOUT1 (2.048MHz) tDH tSPW SYNCOUT tDF CLKOUT2 (6.144MHz) Figure 4-4. DS21602 LOW TO HIGH FREQUENCY CONVERSION FRAME SYNC ALIGNMENT CLKIN (1.544MHz) tSU SYNCIN tHI tPW tD CLKOUT1 (2.048MHz) SYNCOUT tDH tSPW tDF CLKOUT2 (8.192MHz) 13 of 17 DS21600/2/4 Figure 4-5. DS21604 LOW TO HIGH FREQUENCY CONVERSION FRAME SYNC ALIGNMENT CLKIN (1.544MHz) tSU SYNCIN tHI tPW tDH CLKOUT1 (4.096MHz) tD SYNCOUT TSPW tDF CLKOUT2 (8.192MHz) 14 of 17 DS21600/2/4 5. PACKAGE SPECIFICATIONS Figure 5-1. PACKAGE OUTLINE 16-PIN SO 0.300" BODY 15 of 17 DS21600/2/4 Figure 5-2. PACKAGE OUTLINE 8-PIN DIP (300MIL) 16 of 17 DS21600/2/4 6. REVISION HISTORY 1) 2) 3) 4) 5) 6) 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. Updated jitter specifications, 032002. 17 of 17