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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Programmable Timers and Oscillators

Analog Devices Inc./Maxim Integrated DS4425BN+

Name: DS4425BN+
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS4425BN+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS4425BN+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Programmable Timers and Oscillators

Package:: 10-LCCC Exposed Pad

Datasheet:: DS4425BN+.pdf

Description:: IC OSC CLOCK 425MHZ 10-LCCC

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Product details

Overview

DS4425BN+ from Maxim Integrated is a 425MHz LVDS-output ceramic surface-mount clock oscillator in the DS4-XO series, designed for high-speed serial interfaces requiring ultra-low phase jitter (< 0.9ps RMS, 12kHz–20MHz), ±39ppm total frequency stability, and operation across –40°C to +85°C. It uses a fundamental crystal with integrated PLL architecture and features an active-high output enable (OE) pin for power-aware system control.

For engineers reviewing the DS4425BN+ datasheet, DS4425BN+ pinout, DS4425BN+ application, or DS4425BN+ equivalent, this page delivers verified electrical parameters, package dimensions, functional pin roles, real-world Fibre Channel and RAID controller use cases, and two validated alternative oscillators with documented output type and frequency differences.

Technical Context

The DS4425BN+ integrates a precision fundamental-mode crystal with a low-noise digital PLL comprising a phase/frequency detector (PFD), loop filter, and voltage-controlled oscillator (VCO), followed by scalable divider circuitry and a differential LVDS output buffer. Its architecture targets deterministic jitter minimization under supply noise-accumulated deterministic jitter due to power-supply noise is specified at 7ps (P-P) at 1MHz.

It operates exclusively from a 3.3V ±10% supply, draws 53mA typical (unloaded), and delivers LVDS outputs with 250–400mV differential swing, 1.125–1.275V common-mode voltage, and guaranteed 175ps edge speed (20%–80%). Startup time-including oscillator start and PLL lock-is ≤10ms after VCC reaches 3.0V.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Frequency	425.00MHz - fixed, factory-trimmed fundamental-frequency output for SerDes clocking in Fibre Channel and SAS systems.
Output Type	LVDS - differential, low-voltage signaling compliant with ANSI TIA/EIA-644, enabling noise-immune routing on dense PCBs.
Phase Jitter (RMS)	0.9ps (12kHz–20MHz) - meets stringent jitter budgets for 4G/8G Fibre Channel receivers and high-speed ADC sampling clocks.
Frequency Stability	±39ppm total - covers temperature, aging (±7ppm over 15 years), supply (±3ppm/V), and load (±1ppm) variations for long-term timing integrity.
Supply Voltage	3.0V to 3.6V - compatible with standard 3.3V logic rails; no external regulation required.
Operating Temp	–40°C to +85°C - qualified for industrial and enterprise storage environments without derating.
Package	5.0mm × 3.2mm × 1.49mm, 10-pin LCCC - compact ceramic SMT footprint with exposed paddle (non-connected) for thermal management.

Pinout & Package

DS4425BN+ is housed in a 5.0mm × 3.2mm × 1.49mm, 10-pin lead-free LCCC ceramic package (JESD97 e4 finish, Au over Ni). The exposed paddle (EP) must remain unconnected and free of underlying metal.

Pin/Terminal	Circuit Role	Design Meaning
1	OE	Active-high output enable; internal pullup allows floating for always-on operation; disables LVDS outputs to latched differential HIGH state.
2, 7–10	N.C.	No connection - electrically isolated; no routing or soldering required.
3	GND	Ground reference for all internal circuitry and output termination; must be low-impedance plane connection.
4	OUTP	Positive LVDS output - requires 100Ω differential termination to VCC/2 or AC-coupled to receiver.
5	OUTN	Negative LVDS output - paired with OUTP; differential pair must be length-matched and impedance-controlled (100Ω).
6	VCC	+3.3V supply input - bypass with 0.1μF ceramic capacitor near pin; shared with all internal blocks including PLL and output driver.

Key Features

Feature	Design Value
Ultra-low phase jitter	0.9ps RMS (12kHz–20MHz) enables compliance with Fibre Channel FC-PI-4 and SAS-3 jitter masks without external cleanup.
LVDS output interface	Differential 250–400mV swing and 1.125–1.275V common-mode voltage ensure compatibility with standard LVDS receivers and reduce EMI.
Integrated OE control	Active-high logic enables dynamic clock gating in power-managed systems without external logic or level-shifting.
High-frequency stability	±39ppm total variation ensures reliable link training and bit-error-rate performance across temperature, voltage, and lifetime in RAID controllers.
Compact ceramic LCCC	5.0 × 3.2mm footprint saves board space in HBA and switch modules where multi-channel clock distribution is constrained.

Applications

Fibre Channel Hard Disk Drives	Host Bus Adapters
Use Scenario: High-bandwidth data transfer between enterprise HDDs and FC fabric using 4G/8G FC protocols. IC Role / Device Role / Timing Role: Primary reference clock source for SERDES PHY and disk controller ASIC clock domains. Use Value: 425MHz output directly supports 8G FC line rate (8.5Gbps) with sub-1ps jitter, minimizing BER degradation during sustained I/O.	Use Scenario: PCIe-based FC/HBA cards requiring synchronous clocking for host interface and FC port logic. IC Role / Device Role / Timing Role: Low-jitter system clock generator for FPGA-based protocol bridging and DMA engine timing. Use Value: LVDS output drives multiple loads with matched skew; OE pin enables coordinated power-down during PCIe ASPM states.
Raid Controllers	Fibre Channel Switches
Use Scenario: Multi-disk RAID arrays with hardware-accelerated parity calculation and cache coherency. IC Role / Device Role / Timing Role: Master clock for RAID-on-chip (ROC) ASIC, memory controller, and SAS expander interface. Use Value: ±39ppm stability ensures consistent timing across hot-swap events and ambient temperature swings in 2U/4U chassis.	Use Scenario: Line cards in modular FC switches handling concurrent 8G FC ports with deterministic latency. IC Role / Device Role / Timing Role: Reference oscillator for switch fabric clocking, buffer management, and port synchronization. Use Value: 175ps edge speed and 45–55% duty cycle support precise setup/hold timing for high-speed crossbar arbitration logic.

Fibre Channel Hard Disk Drives

Host Bus Adapters

Use Scenario: High-bandwidth data transfer between enterprise HDDs and FC fabric using 4G/8G FC protocols.

IC Role / Device Role / Timing Role: Primary reference clock source for SERDES PHY and disk controller ASIC clock domains.

Use Value: 425MHz output directly supports 8G FC line rate (8.5Gbps) with sub-1ps jitter, minimizing BER degradation during sustained I/O.

Use Scenario: PCIe-based FC/HBA cards requiring synchronous clocking for host interface and FC port logic.

IC Role / Device Role / Timing Role: Low-jitter system clock generator for FPGA-based protocol bridging and DMA engine timing.

Use Value: LVDS output drives multiple loads with matched skew; OE pin enables coordinated power-down during PCIe ASPM states.

Raid Controllers

Fibre Channel Switches

Use Scenario: Multi-disk RAID arrays with hardware-accelerated parity calculation and cache coherency.

IC Role / Device Role / Timing Role: Master clock for RAID-on-chip (ROC) ASIC, memory controller, and SAS expander interface.

Use Value: ±39ppm stability ensures consistent timing across hot-swap events and ambient temperature swings in 2U/4U chassis.

Use Scenario: Line cards in modular FC switches handling concurrent 8G FC ports with deterministic latency.

IC Role / Device Role / Timing Role: Reference oscillator for switch fabric clocking, buffer management, and port synchronization.

Use Value: 175ps edge speed and 45–55% duty cycle support precise setup/hold timing for high-speed crossbar arbitration logic.

Equivalent & Alternatives

The following parts are listed as comparable options for similar clock oscillator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DS4425AN+	LVPECL output (not LVDS); higher supply current (50mA vs. 53mA); VOH/VOL referenced to VCC −1.085V / VCC −1.825V.	Requires 100Ω termination to VCC, not VCC/2; incompatible with LVDS-only receivers; better for legacy PECL backplanes.	Select DS4425AN+ only when interfacing with PECL-compatible ASICs or when lower output impedance is needed.
Si5338A-D-GM	Programmable 4-output clock generator (I²C-configurable); wider frequency range (0.16–350MHz per output); higher integration but larger QFN package.	Supports multi-frequency, multi-protocol systems (FC + PCIe + SATA); not a drop-in replacement; requires firmware configuration.	Choose Si5338A-D-GM when flexibility across mixed-interface boards outweighs cost and layout simplicity of fixed-frequency DS4425BN+.

Compared with DS4425AN+ and Si5338A-D-GM, the DS4425BN+ offers lowest risk, zero-configuration deployment for dedicated 425MHz LVDS clocking-ideal for volume production where BOM simplification, jitter margin, and thermal reliability are prioritized over programmability or output count.

Availability

DS4425BN+ is available at Aetrix Electronics and suitable for Fibre Channel storage systems, enterprise RAID controllers, and high-density FC switch line cards requiring stable component supply, long-lifecycle availability, and traceable sourcing for industrial OEM programs.

Supply support for DS4425BN+ 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) is a U.S.-based semiconductor company specializing in precision analog, mixed-signal, and high-frequency timing solutions for industrial, communications, and computing markets.

The DS4-XO series-including DS4425BN+-was engineered specifically for high-speed serial infrastructure, delivering low-jitter, fixed-frequency clock sources optimized for Fibre Channel, SAS, and other 3–8Gbps serial protocols.

FAQ

What is the output type and voltage specification for DS4425BN+?

The DS4425BN+ provides LVDS (Low-Voltage Differential Signaling) outputs with a differential voltage swing of 250–400mV and a common-mode voltage of 1.125–1.275V. It requires 100Ω differential termination and operates from a 3.3V ±10% supply. Unlike the LVPECL variant DS4425AN+, the DS4425BN+ does not reference its outputs to VCC and is incompatible with PECL receivers.

Does DS4425BN+ require external configuration or programming?

No, DS4425BN+ is a fixed-frequency oscillator with no configuration interface. Its 425.00MHz output is factory-trimmed using the internal crystal and PLL, and it requires only power (VCC), ground (GND), and optional OE control. No I²C, SPI, or pin-strapping is needed-making DS4425BN+ ideal for plug-and-play timing in production systems.

What is the startup time and operating temperature range of DS4425BN+?

The DS4425BN+ achieves full operational readiness-including crystal startup and PLL lock-in ≤10ms after VCC reaches 3.0V. It is fully specified across –40°C to +85°C, with all electrical parameters (jitter, frequency stability, supply current) guaranteed over this industrial temperature range without derating.

How is the output disabled on DS4425BN+, and what happens to the outputs?

DS4425BN+ uses an active-high Output Enable (OE) pin (Pin 1). When OE is driven low or grounded, the LVDS outputs are latched: OUTP goes high and OUTN goes low, maintaining a defined differential logic HIGH state. This behavior prevents floating signals and eliminates the need for external termination during disable-distinct from the high-impedance state used in the LVPECL variant DS4425AN+.

What package type and mounting requirements apply to DS4425BN+?

DS4425BN+ uses a 5.0mm × 3.2mm × 1.49mm, 10-pin LCCC ceramic package with a non-connected exposed paddle (EP). The EP must remain unconnected and have no metal beneath it per Maxim's thermal design guidance. Reflow must follow IPC/JEDEC J-STD-020 profile, and the device is lead(Pb)-free with JESD97 e4 (Au over Ni) finish.

DS4425BN+ 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:: 53 mA

Operating Temperature:: -40°C ~ 85°C

Supplier Device Package:: 10-LCCC (5x3.2)

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

DS4425BN+ FAQ

1.How can I place an order for DS4425BN+ through Aetrix?

Please submit a Request for Quotation (RFQ) for DS4425BN+ 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 DS4425BN+ reliable?

The price and inventory of DS4425BN+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS4425BN+ is usually 5 days.

3.What payment methods are accepted for DS4425BN+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS4425BN+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS4425BN+?

DS4425BN+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS4425BN+ 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 DS4425BN+?

For technical support, including DS4425BN+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS4425BN+ requirements.

6.How does Aetrix verify that DS4425BN+ is sourced from the original manufacturer or authorized distributors?

All DS4425BN+ 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 DS4425BN+ meets industry standards.

7.What is the process for return or replacement of DS4425BN+?

All DS4425BN+ units undergo pre-shipment inspection (PSI). If there is an issue with DS4425BN+, 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 DS4425BN+ part is unused and in its original packaging.

Return procedure for DS4425BN+:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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