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Analog Devices Inc./Maxim Integrated DS4425AN+
- Part No.:
- DS4425AN+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Programmable Timers and Oscillators
- Package:
- 10-LCCC Exposed Pad
- Datasheet:
-
DS4425AN+.pdf
- Description:
- IC OSC CLOCK 425MHZ 10-LCCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,836
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Product details
Overview
DS4425AN+ from Maxim Integrated is a 425MHz LVPECL-output ceramic surface-mount clock oscillator in the DS4-XO series, designed for high-speed serial data links requiring ultra-low phase jitter (<0.9ps RMS, 12kHz–20MHz) and tight frequency stability (±39ppm total). It operates from a 3.3V ±10% supply, delivers 50mA typical supply current, and is housed in a 5.0mm × 3.2mm × 1.49mm 10-pin LCCC package. It serves as a precision timing reference in Fibre Channel switches and RAID controllers.
For engineers reviewing the DS4425AN+ datasheet, DS4425AN+ pinout, DS4425AN+ application, or DS4425AN+ equivalent, key selection criteria include its 425MHz LVPECL output, ±39ppm total frequency stability over temperature/aging/load/supply, 0.9ps RMS phase jitter, 10-pin LCCC mechanical footprint, and active-high OE control with high-impedance disable state.
Technical Context
The DS4425AN+ integrates a fundamental-mode crystal with a low-noise PLL containing a digital phase/frequency detector (PFD) and voltage-controlled oscillator (VCO), followed by selectable clock-divider circuitry and an LVPECL output buffer. Its architecture enables precise multiplication to 425MHz while maintaining sub-picosecond jitter performance.
It supports differential LVPECL signaling with defined VOH (VCC − 0.88V) and VOL (VCC − 1.62V), operates across −40°C to +85°C, and features an on-chip pull-up on OE enabling output disable via logic-low assertion - placing the LVPECL outputs in high-impedance mode without external termination changes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 425.00MHz - fixed factory-trimmed frequency for SerDes clocking in Fibre Channel and storage interconnects. |
| Phase Jitter (RMS) | 0.9ps (12kHz–20MHz) - ensures <1 UI jitter accumulation in 10Gbps+ serial links, meeting FC-PI-4 and SAS-3 timing budgets. |
| Frequency Stability | ±39ppm total (temp/aging/load/supply) - guarantees timing margin retention over 15-year field life and board-level voltage variation. |
| Supply Voltage | 3.0V to 3.6V (3.3V ±10%) - compatible with standard FPGA/ASIC core I/O rails and eliminates need for dedicated LDO. |
| Output Type | LVPECL - provides fast edge rates (200ps tR/tF), robust noise immunity, and direct interface to TI, Xilinx, and Broadcom SerDes inputs. |
| Operating Temp | −40°C to +85°C - qualified for industrial and enterprise storage environments including hot-swappable drive bays. |
| Supply Current | 50mA typical (unloaded) - enables thermal-aware layout in dense PCB areas with ≤165mW power dissipation at 3.3V. |
Pinout & Package
DS4425AN+ uses a 5.0mm × 3.2mm × 1.49mm 10-pin LCCC (Leadless Ceramic Chip Carrier) surface-mount ceramic package with exposed paddle (EP) that must remain unconnected and free of underlying metal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable | Active-high TTL-compatible control; internal pull-up allows enable-by-default operation; drives LVPECL outputs to high-Z when low. |
| 2, 7–10 (N.C.) | No Connection | Unbonded die pads - must be left floating; no routing or copper fill required under these pins. |
| 3 (GND) | Ground Reference | Primary return path for oscillator core and output driver; requires low-inductance connection to solid ground plane. |
| 4 (OUTP) | LVPECL Positive Output | Differential clock signal positive leg; requires 100Ω termination to VCC − 2V for proper common-mode level. |
| 5 (OUTN) | LVPECL Negative Output | Differential clock signal negative leg; complements OUTP to deliver 800mV differential swing into 100Ω load. |
| 6 (VCC) | Power Supply | +3.3V supply input; requires local 100nF + 10µF decoupling adjacent to pin per Maxim layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low Phase Jitter | 0.9ps RMS (12kHz–20MHz) - directly enables compliance with 10G/16G Fibre Channel BER <10⁻¹² requirements. |
| Factory-Fixed 425MHz Output | No external configuration needed - eliminates BOM count, layout complexity, and startup delay associated with programmable oscillators. |
| LVPECL Output with OE Control | High-impedance disable state allows dynamic clock gating in multi-rail systems without signal contention or termination disruption. |
| 10-Pin LCCC Ceramic Package | 5.0 × 3.2mm footprint - saves >40% board area vs. legacy 7.0 × 5.0mm metal-can oscillators while maintaining hermetic reliability. |
| ±39ppm Total Stability | Guaranteed over full temp range, 15-year aging, ±10% supply, and ±10% load variation - reduces system-level timing margin analysis effort. |
Applications
| Fibre Channel Switches | RAID Controllers |
|---|---|
Use Scenario: High-density 16GFC line cards requiring synchronous clocking across multiple ASICs and transceivers. IC Role / Device Role / Timing Role: Primary reference clock source for SERDES PHYs and switch fabric timing recovery circuits. Use Value: 425MHz output aligns with 16GFC 8b/10b encoded line rate (1.6Gbaud × 2.65625 = 425MHz); sub-1ps jitter prevents eye closure at receiver input. | Use Scenario: Enterprise-class storage controllers managing 24+ SAS/SATA drives with dual-port host interfaces. IC Role / Device Role / Timing Role: System master clock for PCIe Gen3 root complex, SAS expander, and DRAM controller timing domains. Use Value: ±39ppm stability ensures sustained link training success across temperature cycling and long-term aging, reducing field return rates. |
| Host Bus Adapters | Fibre Channel Hard Disk Drives |
Use Scenario: Low-profile HBA modules installed in 1U servers where vertical height and thermal envelope are constrained. IC Role / Device Role / Timing Role: Compact, low-power clock generator for dual-lane PCIe uplink and 16GFC downlink SerDes blocks. Use Value: 5.0 × 3.2mm LCCC package fits within 8mm height budget; 50mA supply current minimizes local heat generation near connectors. | Use Scenario: 2.5-inch enterprise SSDs with integrated Fibre Channel interface for blade server storage expansion. IC Role / Device Role / Timing Role: Embedded timing source for FC-AL loop arbitration and buffer memory clocking. Use Value: −40°C to +85°C rating supports operation inside sealed drive enclosures; LVPECL drive strength ensures signal integrity over short flex-cable traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar clock oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si510-425M000000DG | 425MHz LVPECL output; ±20ppm initial tolerance; 0.8ps RMS jitter (12kHz–20MHz); 3.3V supply; 5.0 × 3.2mm QFN. | Programmable frequency (factory-configured); supports spread-spectrum option; no OE pin - always enabled. | Select for tighter initial accuracy or if spread-spectrum EMI reduction is required; verify OE functionality not needed in design. |
| AK2-425.000MHZ-E | 425MHz LVPECL output; ±50ppm total stability; 1.2ps RMS jitter; 3.3V supply; 5.0 × 3.2mm LCC. | Higher jitter and looser stability; no OE control; RoHS-compliant but non-lead-free finish. | Select only for cost-sensitive, non-critical timing paths where 1.2ps jitter and ±50ppm stability meet system margin. |
Compared with Si510-425M000000DG and AK2-425.000MHZ-E, DS4425AN+ offers superior jitter performance (0.9ps vs. 0.8ps/1.2ps) and guaranteed OE control, making it preferred for deterministic clock-gating in storage controllers - though Si510 provides better initial tolerance and AK2 lower unit cost.
Availability
DS4425AN+ is available at Aetrix Electronics and suitable for Fibre Channel switches, RAID controllers, host bus adapters, and Fibre Channel hard disk drives requiring stable component supply, long-term lifecycle support, and guaranteed lead-free (JESD97 e4) packaging.
Supply support for DS4425AN+ 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 solutions for industrial, communications, and computing applications.
The DS4-XO series was developed specifically for high-reliability, low-jitter clock generation in enterprise storage and high-speed serial interconnects - prioritizing phase noise, stability, and compact ceramic packaging over programmability.
FAQ
What output type does the DS4425AN+ provide?
The DS4425AN+ provides LVPECL (Low-Voltage Positive Emitter-Coupled Logic) differential outputs. This is confirmed by the "A" suffix in the part number (DS4425AN+) and the Selector Guide, which lists DS4425AN+ as LVPECL with 425.00MHz output. The device drives OUTP and OUTN with a nominal 800mV differential swing into a 100Ω load referenced to VCC − 2V.
What is the frequency stability specification for DS4425AN+ over temperature and aging?
The DS4425AN+ has a total frequency stability of ±39ppm, covering combined effects of temperature (−40°C to +85°C), aging (15 years), supply voltage variation (±10%), and load change (±10% termination). This value is explicitly stated in the Electrical Characteristics table under "Frequency Stability Total" and applies directly to DS4425AN+ as a member of the DS4425 family.
Does DS4425AN+ support output enable/disable functionality?
Yes, DS4425AN+ supports output enable/disable via the OE (Output Enable) pin (Pin 1), which has an internal pull-up resistor. When OE is driven logic-high (or left open), the LVPECL outputs are active; when OE is driven logic-low, the outputs enter a high-impedance state. This behavior is documented in the Pin Description and General Description sections of the datasheet.
What package type and dimensions does DS4425AN+ use?
DS4425AN+ uses a 10-pin LCCC (Leadless Ceramic Chip Carrier) package measuring 5.0mm × 3.2mm × 1.49mm, with an unconnected exposed paddle (EP). This is confirmed in the Package Information section, Pin Configuration diagram, and Ordering Information table - all referencing DS4425AN+ specifically as "10 LCCC".
What is the typical phase jitter performance of DS4425AN+?
The DS4425AN+ delivers typical phase jitter of 0.9ps RMS measured over the 12kHz to 20MHz offset range. This value is specified in both the General Description and Electrical Characteristics tables and applies to all members of the DS4425 family, including DS4425AN+, as confirmed by the "DS4425" row in the Clock Output section.
DS4425AN+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- DS4-XO
- Package/Case:
- 10-LCCC Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Clock Oscillator
- Count:
- -
- Frequency:
- 425MHz
- Voltage - Supply:
- 3V ~ 3.6V
- Current - Supply:
- 50 mA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-LCCC (5x3.2)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
DS4425AN+ FAQ
1.How can I place an order for DS4425AN+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS4425AN+ 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 DS4425AN+ reliable?
The price and inventory of DS4425AN+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS4425AN+ is usually 5 days.
3.What payment methods are accepted for DS4425AN+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS4425AN+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS4425AN+?
DS4425AN+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS4425AN+ 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 DS4425AN+?
For technical support, including DS4425AN+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS4425AN+ requirements.
6.How does Aetrix verify that DS4425AN+ is sourced from the original manufacturer or authorized distributors?
All DS4425AN+ 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 DS4425AN+ meets industry standards.
7.What is the process for return or replacement of DS4425AN+?
All DS4425AN+ units undergo pre-shipment inspection (PSI). If there is an issue with DS4425AN+, 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 DS4425AN+ part is unused and in its original packaging.
Return procedure for DS4425AN+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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