Datasheet

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DS21600/DS21602/DS21604

3.3V/5V Clock Rate Adapte

www.maxim-ic.com

GENERAL DESCRIPTION

The DS21600/DS21602/DS21604 are multiple-rate

clock adapters that convert between E-carrier and T-

carrier clocks rates. A T1 or E1 clock output,

CLKOUT1, is available, along with a higher multiple

rate clock output, 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 either a 5V

or 3.3V supply. All operation modes include a

standard 8kHz output.

The DS21600/DS21602/DS21604 are available in

16-pin SO, and are rated for industrial temperatures.

ORDERING INFORMATION

PART TEMP RANGE PIN-PACKAGE

DS21600SN

-40°C to +85°C 16 SO

DS21600SN+ -40°C to +85°C 16 SO

DS21600N -40°C to +85°C 8 DIP

DS21600N+ -40°C to +85°C 8 DIP

DS21602SN

-40°C to +85°C

16 SO

DS21602SN+ -40°C to +85°C 16 SO

DS21602N -40°C to +85°C 8 DIP

DS21602N+ -40°C to +85°C 8 DIP

DS21604SN

-40°C to +85°C

16 SO

DS21604SN+ -40°C to +85°C 16 SO

DS21604N -40°C to +85°C 8 DIP

DS21604N+ -40°C to +85°C 8 DIP

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REV: 011606

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: www.maxim-ic.com/errata

+ Denotes a lead(Pb)-free/RoHS-compliant device.

FREQUENCY CONVERSIONS (MHz)

PART CLKIN CLKOUT1 CLKOUT2

1.544 2.048 6.144

DS21600

2.048 1.544 6.176

1.544 2.048 8.192

DS21602

2.048 1.544 6.176

1.544 4.096 8.192

DS21604

4.096 1.544 6.176

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

 3.3V or 5V Supply

 Low Jitter Output

 Multiple Output Clocks Synchronized to

Input Clock

 8kHz Frequency-Locked Output for All

Operation Modes

 No External Components Required

 16-Pin SO and 8-Pin DIP

 Industrial Temperature Range: -40°C to

+85°C

PIN CONFIGURATION

Dallas

Semiconductor

DS21600/2/4

TOP VIEW

Summary of content (12 pages)

PAGE 1
DS21600/DS21602/DS21604 3.3V/5V Clock Rate Adapter www.maxim-ic.com GENERAL DESCRIPTION FEATURES The DS21600/DS21602/DS21604 are multiple-rate clock adapters that convert between E-carrier and Tcarrier clocks rates. A T1 or E1 clock output, CLKOUT1, is available, along with a higher multiple rate clock output, 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.
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TABLE OF CONTENTS 1. PIN DESCRIPTION ................................................................................................ 3 1.1 2. PIN NAME CROSS-REFERENCE TO LXP60X ......................................................................... 3 FUNCTIONAL DESCRIPTION ............................................................................... 4 2.1 2.2 3. MODE SELECT .....................................................................................................................
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1. PIN DESCRIPTION Table 1-A. Pin Description PIN DIP — SO 1, 3, 6, 8, 10, 11, 13, 15 NAME TYPE N.C. — 1 2 SYNCOUT Output 2 4 CLKOUT2 Output 3 5 CLKIN Input 4 7 CLKOUT1 Output 5 9 Vss Supply 6 12 SEL Input 7 14 SYNCIN Input 8 16 VDD Supply FUNCTION No Connect Synchronization Output. An 8kHz output that can be synchronized to the clock outputs. Clock Output 2. T1 or E1 carrier clock output referenced to CLKIN. Clock Input. Reference Clock Input.
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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 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. 2.1 Mode Select The SEL pin is used to select the operating frequencies. Table 2-A shows the SEL state for the various operating modes of the DS21600, DS21602, and DS21604. Table 2-A.
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3.1 Jitter Transfer Figure 3-1 and Figure 3-2 show jitter transfer for 2.048MHz-to-1.544MHz conversions and vice versa. Figure 3-1. Nominal Jitter Transfer for 2.048MHz-to-1.544MHz Conversion JITTER GAIN (ns/ns) 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 THE DS21600/DS21602/DS21604 IS ABOUT 1.6 FOR CONVERSION FROM T1 TO E1. THE TYPICAL PEAK-JITTER GAIN OF THE LEVEL ONE DEVICE IS ABOUT 1.1.
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Figure 3-2. Nominal Jitter Transfer for 1.544MHz-to-2.048MHz Conversion 2.00 JITTER GAIN (ns/ns) 1.80 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 THE DS21600/DS21602/DS21604 IS ABOUT 1.6 FOR CONVERSION FROM T1 TO E1. THE TYPICAL PEAK-JITTER GAIN OF THE LEVEL ONE DEVICE IS ABOUT 1.1.
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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 Soldering Temperature..…………………………………………………….See IPC/JEDEC J-STD-020 Specification Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
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AC TIMING (Figure 4-1, Figure 4-2, Figure 4-3, Figure 4-4, and Figure 4-5) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Capture Range on CLKIN (Note 1) ±10,000 ppm Lock Range on CLKIN (Note 1) ±10,000 ppm CLKIN Duty Cycle SYNCIN Setup to CLKIN Rising SYNCIN Hold After CLKIN Rising tSU tHI (Note 1) (Note 1) (Note 1) 35 46 30 SYNCIN Pulse Width tPW (Note 1) 76 CLKOUT1 Delay from CLKIN Rising tD -15 -15 CLKOUT1 Duty Cycle SYNCOUT Delay from CLKOUT2 CD tDF 3.
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Figure 4-2. DS21604 High-To-Low Frequency Conversion Frame-Sync Alignment CLKIN (4.096MHz) tSU tHI SYNCIN tPW CLKOUT1 (1.544MHz) tD tDH SYNCOUT tSPW tDF CLKOUT2 (6.176MHz) Figure 4-3. DS21600 Low-to-High Frequency Conversion Frame-Sync Alignment CLKIN (1.544MHz) tSU SYNCIN CLKOUT1 (2.048MHz) SYNCOUT tHI tPW tD tDH tSPW tDF CLKOUT2 (6.
PAGE 10
Figure 4-4. DS21602 Low-to-High Frequency Conversion Frame-Sync Alignment CLKIN (1.544MHz) tHI tSU SYNCIN tPW tD CLKOUT1 (2.048MHz) tDH tSP SYNCOUT tDF CLKOUT2 (8.192MHz) Figure 4-5. DS21604 Low-to-High Frequency Conversion Frame-Sync Alignment CLKIN (1.544MHz) tHI tSU SYNCIN tPW tDH CLKOUT1 (4.096MHz) tD SYNCOUT TSPW tDF CLKOUT2 (8.
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5. PACKAGE INFORMATION For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. PACKAGE TYPE PACKAGE CODE DOCUMENT NO.
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6. REVISION HISTORY REVISION 082100 083100 090100 011101 092801 032002 032803 113004 112105 011606 DESCRIPTION Preliminary release. Added package specifications. Correct operating voltage range. Added mechanical drawing for DIP package. Added jitter specifications and pin list for all packages; added timing diagrams. Updated jitter specifications. Added 3.3V operation specifications. Added the spec for soldering temperature in the Absolute Maximum Ratings section.