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Analog Devices Inc./Maxim Integrated DS21602SN+
- Part No.:
- DS21602SN+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
DS21602SN+.pdf
- Description:
- IC CLOCK RATE ADAPTER 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,329
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Product details
Overview
DS21602SN+ from Maxim Integrated is a 3.3V/5V dual-output clock rate adapter IC for T-carrier/E-carrier synchronization, supporting 1.544MHz ↔ 2.048MHz conversion with frequency-locked CLKOUT1 (1.544/2.048MHz), CLKOUT2 (6.176MHz), and SYNCOUT (8kHz). It operates across -40°C to +85°C in industrial telecom timing systems requiring frame-sync alignment.
For engineers reviewing the DS21602SN+ datasheet, DS21602SN+ pinout, DS21602SN+ application, or DS21602SN+ equivalent, this device delivers deterministic phase alignment between T1/E1 clocks and frame-sync inputs, low-jitter output (≤0.035UIP-P per G.823), and drop-in compatibility with LXP602SE - critical for legacy carrier equipment upgrades and multi-rate timing consolidation.
Technical Context
The DS21602SN+ implements an analog PLL-based clock synthesis architecture with feedback divider and frame-sync generator, enabling bidirectional T1↔E1 rate conversion (1.544MHz ↔ 2.048MHz) under SEL pin control. Its outputs are fully frequency-locked to CLKIN and support phase alignment to SYNCIN at 1–8kHz subrates.
It features no external components required, ±10,000ppm capture/lock range on CLKIN, and guaranteed AC timing including CLKOUT1 delay (−15 to +22ns at 5V), SYNCIN setup/hold (46ns/30ns), and rise/fall times ≤40ns (5V) or ≤75ns (3.3V) under 100pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3V ±5% or 5V ±5% - supports mixed-voltage system integration without level-shifting. |
| CLKIN Frequency Range | 1.544MHz or 2.048MHz - precisely matches T1 and E1 primary reference clocks. |
| CLKOUT1 Output | 1.544MHz or 2.048MHz - selectable via SEL pin; provides T1/E1 line-rate clock with ≤65% duty cycle tolerance. |
| CLKOUT2 Output | 6.176MHz - fixed high-multiple clock for framing logic or oversampling applications. |
| SYNCOUT Output | 8kHz - frequency-locked to CLKIN in all modes; used for frame boundary alignment in TDM systems. |
| Output Jitter (G.823) | ≤0.035UIP-P (20Hz–100kHz) - meets ITU-T G.823 jitter compliance for E1/T1 distribution. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade telecom infrastructure deployment. |
Pinout & Package
DS21602SN+ is housed in a 16-pin SO (Small Outline) package (package code W16+11), RoHS-compliant and lead-free, with 1.27mm pitch and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SO) | SYNCOUT | 8kHz frame-sync output synchronized to CLKIN and optionally aligned to SYNCIN. |
| 4 (SO) | CLKOUT2 | Fixed 6.176MHz clock output for high-speed framing or sampling clock generation. |
| 5 (SO) | CLKIN | Primary reference input (1.544/2.048MHz); ±10,000ppm capture/lock range ensures robust signal acquisition. |
| 7 (SO) | CLKOUT1 | Selectable T1/E1 output (1.544/2.048MHz) - main line-rate clock for interface PHYs. |
| 9 (SO) | Vss | Digital ground reference; decoupling required near VDD pin for jitter performance. |
| 12 (SO) | SEL | Mode select input: logic high selects 2.048MHz→1.544MHz; logic low selects 1.544MHz→2.048MHz. |
| 14 (SO) | SYNCIN | Frame-sync input (1–8kHz); enables phase alignment of all outputs within ≤50ms at 8kHz. |
| 16 (SO) | VDD | Positive supply (3.3V or 5V); supports dual-voltage system interoperability. |
Key Features
| Feature | Design Value |
|---|---|
| Direct LXP602SE replacement | Pin-compatible and functionally identical to LXP602SE - enables drop-in upgrade without PCB changes. |
| Bidirectional rate conversion | Supports both 1.544MHz→2.048MHz and 2.048MHz→1.544MHz paths using single SEL control line. |
| No external components | Integrated PLL, dividers, and sync generator eliminate external crystals, capacitors, or resistors. |
| Low-jitter output compliance | Meets G.823 and TR62411 jitter specs - validated for carrier-grade timing distribution networks. |
| Industrial temperature operation | Guaranteed functionality from −40°C to +85°C - suitable for uncontrolled telecom cabinet environments. |
Applications
| T1/E1 Line Card Timing | Legacy Equipment Interoperability |
|---|---|
|
Use Scenario: Synchronizing T1 and E1 interfaces on a multi-protocol line card in a central office switch. IC Role / Device Role / Timing Role: Clock rate adapter generating matched 1.544MHz and 2.048MHz outputs locked to a common reference while aligning frame boundaries via SYNCIN. Use Value: Eliminates need for separate T1 and E1 clock sources, reducing BOM count and board space while maintaining G.823 jitter compliance. |
Use Scenario: Retrofitting aging LXP602-based multiplexers with RoHS-compliant timing hardware. IC Role / Device Role / Timing Role: Pin- and function-equivalent replacement providing identical 1.544/2.048MHz conversion and 8kHz SYNCOUT behavior. Use Value: Enables direct component-level upgrade without layout revision or firmware change, preserving system certification. |
| Multi-Rate Frame Sync Generator | Carrier Network Timing Consolidation |
|
Use Scenario: Aligning frame boundaries across TDM backplanes where multiple line rates coexist. IC Role / Device Role / Timing Role: Generating phase-aligned CLKOUT1, CLKOUT2, and SYNCOUT outputs referenced to a single CLKIN and synchronized to external 8kHz SYNCIN. Use Value: Ensures deterministic inter-slot timing across mixed-rate TDM streams, preventing bit slips in cross-connect fabric. |
Use Scenario: Reducing component count in new carrier-grade access gateways supporting both T1 and E1 services. IC Role / Device Role / Timing Role: Single-IC solution replacing discrete clock synthesizers and frame-sync logic for dual-standard timing distribution. Use Value: Lowers system power (14mA typical), simplifies thermal design, and improves long-term timing stability via integrated analog PLL. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar clock rate adapter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LXP602SE | Same pinout, identical function, but not RoHS-compliant; requires Pb-containing solder process. | Valid only in legacy manufacturing with non-RoHS assembly lines. | Select LXP602SE only if RoHS exemption applies and existing qualification must be preserved. |
| DS21602N+ | Identical electrical specs but in 8-pin DIP package - larger footprint, through-hole mounting. | Suitable for prototyping, lab validation, or legacy DIP-based carrier boards. | Choose DS21602N+ when manual assembly, socketing, or mechanical compatibility with older DIP layouts is required. |
Compared with LXP602SE and DS21602N+, the DS21602SN+ offers RoHS compliance in a compact 16-pin SO package while retaining full functional equivalence - making it optimal for volume production of new industrial telecom hardware where footprint, environmental compliance, and supply continuity are prioritized.
Availability
DS21602SN+ is available at Aetrix Electronics and suitable for T1/E1 line cards, carrier-grade multiplexers, telecom timing modules, and industrial TDM equipment requiring stable component supply and long lifecycle support.
Supply support for DS21602SN+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and timing ICs for industrial, communications, and computing applications.
The DS21602SN+ belongs to Maxim's carrier-grade clock adaptation product line, engineered specifically for T1/E1 synchronization in telecom infrastructure where jitter performance, phase alignment, and drop-in legacy compatibility are mandatory.
FAQ
What clock frequencies does the DS21602SN+ support for conversion?
The DS21602SN+ supports bidirectional conversion between 1.544MHz (T1) and 2.048MHz (E1) reference clocks. When CLKIN = 1.544MHz and SEL = low, CLKOUT1 = 2.048MHz; when CLKIN = 2.048MHz and SEL = high, CLKOUT1 = 1.544MHz. CLKOUT2 is fixed at 6.176MHz in both modes, and SYNCOUT is always 8kHz.
Is the DS21602SN+ pin-compatible with the LXP602SE?
Yes, the DS21602SN+ is a direct drop-in replacement for the LXP602SE, with identical pin configuration, electrical behavior, and timing specifications. The DS21602SN+ retains the same SO-16 footprint and pin functions - including SYNCOUT, CLKOUT2, CLKIN, CLKOUT1, SEL, SYNCIN, Vss, and VDD - enabling seamless migration.
Does the DS21602SN+ require external components for operation?
No, the DS21602SN+ requires no external components. Its internal analog PLL, dividers, and frame-sync generator eliminate the need for external crystals, loop filters, or timing resistors. Only standard power supply decoupling (e.g., 0.1µF ceramic capacitor near VDD) is recommended for optimal jitter performance.
How does the DS21602SN+ achieve phase alignment between outputs and SYNCIN?
The DS21602SN+ uses its internal frame-sync generator to align CLKOUT1, CLKOUT2, and SYNCOUT edges to the rising edge of SYNCIN (1–8kHz). Phase lock occurs within ≤50ms when SYNCIN = 8kHz, ensuring deterministic frame boundary alignment across TDM time slots without software intervention.
What is the jitter performance of the DS21602SN+ under G.823 compliance?
The DS21602SN+ meets ITU-T G.823 jitter specifications with ≤0.035UIP-P (peak-to-peak) in the 20Hz–100kHz band for 2.048MHz→1.544MHz conversion. This verified jitter performance ensures reliable operation in carrier-class T1/E1 distribution networks where timing integrity is strictly regulated.
DS21602SN+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Clock Rate Adapter
- PLL:
- Yes
- Input:
- Clock
- Output:
- Clock
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:2
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 8.192MHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 3.135V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-SOIC
DS21602SN+ FAQ
1.How can I place an order for DS21602SN+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS21602SN+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DS21602SN+ reliable?
The price and inventory of DS21602SN+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS21602SN+ is usually 5 days.
3.What payment methods are accepted for DS21602SN+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS21602SN+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS21602SN+?
DS21602SN+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS21602SN+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DS21602SN+?
For technical support, including DS21602SN+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS21602SN+ requirements.
6.How does Aetrix verify that DS21602SN+ is sourced from the original manufacturer or authorized distributors?
All DS21602SN+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DS21602SN+ meets industry standards.
7.What is the process for return or replacement of DS21602SN+?
All DS21602SN+ units undergo pre-shipment inspection (PSI). If there is an issue with DS21602SN+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DS21602SN+ part is unused and in its original packaging.
Return procedure for DS21602SN+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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