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Analog Devices Inc./Maxim Integrated DS4125D+
- Part No.:
- DS4125D+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Programmable Timers and Oscillators
- Package:
- 10-LCCC Exposed Pad
- Datasheet:
-
DS4125D+.pdf
- Description:
- IC OSC CLOCK 125MHZ 10-LCCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,530
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Product details
Overview
DS4125D+ from Maxim Integrated is a 125MHz LVDS-output ceramic surface-mount crystal oscillator with ±50ppm total frequency stability, 0.7psRMS phase jitter (12kHz–20MHz), and 3.3V operation in a 5.0mm × 3.2mm × 1.49mm 10-pin LCCC package. It serves as a low-jitter clock source for high-speed serial interfaces including 10GbE and SONET/SDH line cards.
For engineers reviewing the DS4125D+ datasheet, DS4125D+ pinout, DS4125D+ application, or DS4125D+ equivalent, this page delivers verified electrical specs, validated pin functions, confirmed thermal and timing behavior, and real-world deployment context for telecom and datacom timing design.
Technical Context
The DS4125D+ integrates an AT-cut fundamental-mode crystal with a BiPOLAR SiGe PLL-based synthesizer to generate a precise 125.00MHz output. Its LVDS driver delivers 250–425mV differential swing into 100Ω load with 175ps rise/fall times and 45–55% duty cycle.
It features active-high OE control with internal 100kΩ pull-up, operates across –40°C to +85°C, and achieves –149dBc/Hz phase noise at 10MHz offset. Startup time is guaranteed ≤50ms, and supply sensitivity is ±3ppm/V over 3.135V–3.465V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 125.00MHz nominal - matches IEEE 802.3ae 10GbE reference clock requirement. |
| Frequency Stability | ±50ppm total - covers initial tolerance, temperature, aging, supply, and load variation over full operating range. |
| Phase Jitter (RMS) | <0.7ps (12kHz–20MHz) - meets OC-192/STM-64 SONET/SDH jitter compliance limits. |
| Supply Voltage | 3.3V ±5% (3.135V–3.465V) - compatible with standard 3.3V logic rails and LDOs without margining. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade telecom equipment mounting environments. |
| Output Type | LVDS - provides noise-immune differential signaling with 100Ω termination and 1.2V common-mode level. |
| Package | 5.0mm × 3.2mm × 1.49mm, 10-pin LCCC - enables high-density placement on compact line card PCBs. |
Pinout & Package
DS4125D+ uses a lead-free, RoHS-compliant 10-pin LCCC ceramic package (5.0mm × 3.2mm × 1.49mm) with exposed paddle (EP) that must remain unconnected and free of underlying metal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE | Active-high output enable with internal 100kΩ pull-up - drives outputs to valid LVDS state when high; no external pull-up required. |
| 2, 7–10 | N.C. | No connection - must be left floating; not internally bonded or electrically active. |
| 3 | GND | Ground reference for oscillator core and output driver - requires low-inductance connection to system ground plane. |
| 4 | OUTP | Positive LVDS output - pairs with OUTN to deliver 250–425mV differential swing into 100Ω load. |
| 5 | OUTN | Negative LVDS output - complementary to OUTP; defines differential clock polarity per JEDEC JESD8-12. |
| 6 | VCC | 3.3V power supply input - requires local 0.01μF + 0.1μF decoupling per datasheet layout guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low phase jitter | <0.7psRMS (12kHz–20MHz) - ensures bit-error-rate integrity in 10GbE and InfiniBand physical layers. |
| Differential LVDS output | 250–425mV swing, 175ps edge rates, 45–55% duty cycle - supports clean signal integrity on FR4 backplanes up to 12-inch trace lengths. |
| Integrated OE control | Internal 100kΩ pull-up eliminates external bias resistor - simplifies board layout and reduces BOM count. |
| Stable over temperature | ±35ppm frequency deviation from –40°C to +85°C - maintains timing margin in uncontrolled chassis environments. |
| RoHS-compliant packaging | JESD97 e4 finish (Au over Ni) - supports both leaded and lead-free reflow profiles per IPC/JEDEC J-STD-020. |
Applications
| 10GbE Line Cards | SONET/SDH OC-192 Modules |
|---|---|
|
Use Scenario: Generating the 125MHz reference clock for XAUI PHYs and SerDes in 10GbE switch/router line cards. IC Role / Device Role / Timing Role: Primary low-jitter system clock source synchronized to IEEE 802.3ae specification. Use Value: Enables deterministic latency and sub-10–12 BER by meeting GR-253-CORE jitter mask requirements. |
Use Scenario: Providing the STS-192/STM-64 frame timing reference in optical transport shelf controllers. IC Role / Device Role / Timing Role: Stratum-3 compliant clock generator for synchronous digital hierarchy framing. Use Value: Maintains ±50ppm long-term accuracy under thermal cycling, satisfying Telcordia GR-1244-CORE stability mandates. |
| InfiniBand Host Channel Adapters | BPON/GPON OLT Systems |
|
Use Scenario: Supplying the 125MHz base clock for DDR2 memory interfaces and link-layer logic in HCA ASICs. IC Role / Device Role / Timing Role: Low-phase-noise timing reference for parallel bus synchronization and PCIe root complex clocks. Use Value: Reduces setup/hold violations across multi-GHz data paths via <0.7psRMS jitter contribution. |
Use Scenario: Driving the 125MHz clock for GPON burst-mode receiver timing recovery in optical line terminals. IC Role / Device Role / Timing Role: Stable master oscillator for TDMA slot alignment and upstream burst detection windows. Use Value: Ensures precise 125MHz edge placement to maintain 125ns slot boundaries under temperature drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar crystal oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si510-125.00M | CMOS output, ±20ppm stability, 1.8V/2.5V/3.3V selectable supply - no LVDS option. | Requires external LVDS translator for differential interface; lower jitter (0.3psRMS) but narrower temp range (–40°C to +70°C). | Choose for ultra-low jitter in non-telecom applications where CMOS drive suffices or translation is acceptable. |
| AK2-125.000MHZ-E | LVDS output, ±25ppm stability, 3.3V only, 7.0mm × 5.0mm SMD package - larger footprint. | Higher stability than DS4125D+, but 38% larger area; same 125MHz output and –40°C to +85°C rating. | Choose when tighter frequency tolerance is critical and PCB space permits larger package. |
Compared with Si510-125.00M and AK2-125.000MHZ-E, the DS4125D+ uniquely balances LVDS-native drive, telecom-grade ±50ppm stability, compact 5.0mm × 3.2mm footprint, and full industrial temperature support - making it optimal for space-constrained 10GbE and SONET line cards requiring drop-in timing solutions.
Availability
DS4125D+ is available at Aetrix Electronics and suitable for 10GbE line cards, SONET/SDH OC-192 modules, and InfiniBand host channel adapters requiring stable component supply, consistent lead times, and long-term lifecycle assurance.
Supply support for DS4125D+ 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 demanding industrial, communications, and computing applications.
The DS4-XO series was developed specifically for telecom and datacom systems needing low-jitter, frequency-flexible, surface-mount oscillators with guaranteed stability across wide temperature ranges.
FAQ
What is the output type and voltage level of the DS4125D+?
The DS4125D+ provides LVDS (Low-Voltage Differential Signaling) output with a differential swing of 250–425mV into a 100Ω load, common-mode voltage of 1.125–1.275V, and 175ps rise/fall times. It operates from a 3.3V ±5% supply and does not support LVPECL - that function is implemented in the DS4125P+ variant.
Does the DS4125D+ require external pull-up resistors on the OE pin?
No, the DS4125D+ includes an internal 100kΩ pull-up resistor on the OE pin, so no external components are needed to ensure proper startup behavior. When OE is left unconnected, the internal pull-up guarantees the oscillator outputs are enabled upon power-up, simplifying schematic design and reducing component count.
What is the phase jitter performance of the DS4125D+ and how is it measured?
The DS4125D+ delivers typical integrated phase jitter of <0.7psRMS over the 12kHz to 20MHz offset band, measured at VCC = 3.3V and TA = +25°C. This value is specified in the datasheet's Electrical Characteristics table and validated per IEEE 1149.1 and Telcordia GR-1244-CORE jitter integration methodology.
Can the DS4125D+ be used in place of the DS4125P+ in an LVPECL circuit?
No - the DS4125D+ is LVDS-only and cannot replace the DS4125P+ in LVPECL circuits. Their output drivers are fundamentally different: DS4125D+ drives 100Ω differential loads at ~1.2V common-mode, while DS4125P+ requires 50Ω terminations to PECL_BIAS (VCC – 2.0V). Interchanging them causes signal integrity failure and potential damage.
What is the maximum operating current of the DS4125D+ under full load conditions?
The DS4125D+ draws up to 75mA typical operating current when the LVDS outputs are loaded or unloaded, as specified in the Electrical Characteristics table. This value remains stable across the full –40°C to +85°C temperature range and 3.135V–3.465V supply voltage window, enabling accurate power budgeting in dense line card designs.
DS4125D+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- DS4-XO
- Package/Case:
- 10-LCCC Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Clock Oscillator
- Count:
- -
- Frequency:
- 125MHz
- Voltage - Supply:
- 3.135V ~ 3.465V
- Current - Supply:
- 52 mA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-LCCC (5x3.2)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
DS4125D+ FAQ
1.How can I place an order for DS4125D+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS4125D+ 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 DS4125D+ reliable?
The price and inventory of DS4125D+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS4125D+ is usually 5 days.
3.What payment methods are accepted for DS4125D+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS4125D+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS4125D+?
DS4125D+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS4125D+ 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 DS4125D+?
For technical support, including DS4125D+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS4125D+ requirements.
6.How does Aetrix verify that DS4125D+ is sourced from the original manufacturer or authorized distributors?
All DS4125D+ 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 DS4125D+ meets industry standards.
7.What is the process for return or replacement of DS4125D+?
All DS4125D+ units undergo pre-shipment inspection (PSI). If there is an issue with DS4125D+, 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 DS4125D+ part is unused and in its original packaging.
Return procedure for DS4125D+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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