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Analog Devices Inc./Maxim Integrated DS4M125P+33
- Part No.:
- DS4M125P+33
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Programmable Timers and Oscillators
- Package:
- -
- Datasheet:
-
DS4M125P+33.pdf
- Description:
- IC OSC CLOCK 125MHZ 10-LCCC
- Quantity:
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Inventory:3,955
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Product details
Overview
DS4M125P+33 from Maxim Integrated is a 125MHz margining clock oscillator with LVPECL output, ±5% frequency deviation capability via three-level MS pin control, <0.9ps RMS phase jitter (12kHz–20MHz), and operation from a single 3.3V supply in a 5mm × 3.2mm ceramic LCCC package. It serves as a precision timing source for memory clocking and RAID systems requiring stable, marginable reference clocks.
For engineers reviewing the DS4M125P+33 datasheet, DS4M125P+33 pinout, DS4M125P+33 application, or DS4M125P+33 equivalent, key selection criteria include LVPECL interface compatibility, ±5% margining resolution, 10-pin LCCC footprint, -40°C to +85°C operating range, and 3.3V supply requirement.
Technical Context
The DS4M125P+33 integrates an AT-cut fundamental-mode crystal with a low-jitter PLL to synthesize 125MHz output and its ±5% deviations. Its three-state MS pin accepts defined voltage thresholds (low/mid/high) to select nominal, -5%, or +5% frequency modes without external logic.
It features active-high OE with internal 100kΩ pullup, LVPECL output with PECL_BIAS at VCC−2.0V, and differential rise/fall times ≤200ps. The device draws <100mA at 3.3V and maintains ±35ppm frequency stability over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Frequency | 125MHz - fixed base clock for synchronous memory interfaces |
| Frequency Margining | ±5% - enables system-level timing margin validation without changing clock source |
| Phase Jitter (RMS) | <0.9ps (12kHz–20MHz) - meets stringent jitter budgets for high-speed DDR and SERDES links |
| Output Type | LVPECL - compatible with standard 50Ω-terminated PECL receivers and bias networks |
| Supply Voltage | 3.3V ±3.5% (3.135V–3.465V) - aligns with common I/O rail in server/storage platforms |
| Operating Temp | -40°C to +85°C - supports industrial and enterprise storage ambient conditions |
| Package | 10-pin LCCC (5.0mm × 3.2mm × 1.49mm) - surface-mount ceramic package with exposed thermal pad |
Pinout & Package
DS4M125P+33 uses a 10-pin ceramic LCCC (Leadless Chip Carrier) package with exposed thermal pad (EP) connected to ground for thermal relief. Pin 1 is OE (active-high output enable), Pin 2 is MS (three-level margin select), Pins 4 and 5 are differential LVPECL outputs (OUTP/OUTN), Pin 6 is VCC, Pin 3 is GND, and Pins 7–10 are no-connect terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-high output enable | Drives LVPECL outputs to PECL_BIAS (VCC−2.0V) when low; internal 100kΩ pullup ensures default active state |
| 2 (MS) | Three-level margin select | Accepts low/mid/high voltage levels to set nominal/-5%/+5% output; internal 100kΩ pulldown defaults to nominal mode |
| 3 (GND) | Ground reference | Primary return path for supply and signal currents; connects to EP for thermal conduction |
| 4 (OUTP) | Positive LVPECL output | Differential complement to OUTN; requires 50Ω termination to PECL_BIAS |
| 5 (OUTN) | Negative LVPECL output | Differential complement to OUTP; forms 0.595–0.710V differential swing with OUTP |
| 6 (VCC) | 3.3V power supply | Single-rail input; decoupling with 0.01μF + 0.1μF capacitors required per datasheet |
| 7–10 (N.C.) | No connection | Must remain unconnected and floating; no internal circuitry attached |
Key Features
| Feature | Design Value |
|---|---|
| Three-level frequency margining | Enables deterministic +5% / nominal / −5% clock shifts via analog voltage levels on MS pin-no digital control logic needed |
| LVPECL output with bias control | Outputs referenced to PECL_BIAS = VCC−2.0V ensure compatibility with legacy PECL receivers and simplify termination design |
| Low-power 3.3V operation | Typical ICC ≤70mA (unloaded LVPECL) supports thermal management in dense storage PCB layouts |
| High-frequency stability | ±35ppm over temperature and ±20ppm initial tolerance guarantee timing accuracy across full industrial range |
| Fast frequency switching | 0.5ms max transition between margin states allows rapid test-mode cycling during system validation |
Applications
| Memory Clocking | RAID Controller Timing |
|---|---|
Use Scenario: Synchronizing DDR3/DDR4 memory modules in enterprise servers where timing margins must be validated under worst-case voltage/temperature corners. IC Role / Device Role / Timing Role: Primary system clock generator providing 125MHz reference with programmable ±5% deviation for margin testing. Use Value: Enables in-system clock margining without swapping oscillators-reducing test time and qualification cost. | Use Scenario: Driving multiple SAS/SATA controller ASICs in a redundant disk array where clock consistency across channels affects data integrity. IC Role / Device Role / Timing Role: Low-jitter LVPECL clock source ensuring deterministic inter-channel skew and meeting PCIe Gen3 timing requirements. Use Value: Sub-0.9ps jitter prevents bit errors in high-throughput storage interconnects operating at multi-Gbps rates. |
| Network Attached Storage (NAS) | Industrial Data Acquisition |
Use Scenario: Providing timing for ARM-based SoC peripherals and FPGA-based storage accelerators in fanless NAS enclosures with limited airflow. IC Role / Device Role / Timing Role: Temperature-stable 125MHz oscillator supporting reliable boot and sustained I/O operations across -40°C to +85°C ambient. Use Value: ±35ppm temp stability eliminates need for external calibration, reducing BOM and firmware complexity. | Use Scenario: Clocking high-resolution ADCs and FPGA-based real-time processing engines in ruggedized data loggers deployed in factory environments. IC Role / Device Role / Timing Role: Precision margining oscillator enabling field validation of timing-critical sampling paths under varying line voltage conditions. Use Value: Three-level MS pin allows direct analog control from microcontroller DAC outputs-no additional level-shifting circuitry required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar margining clock oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5338A-D-GM | Programmable I2C-based clock generator (not fixed-frequency); supports wider frequency range but higher jitter (1.2ps RMS) | Requires firmware integration and configuration; better for multi-output or variable-frequency systems | Select Si5338A-D-GM only if programmability and multiple outputs outweigh need for ultra-low jitter and simplicity |
| DS4M125D+33 | Same 125MHz margining oscillator with LVDS (not LVPECL) output; identical pinout and electrical specs except output interface | Used where LVDS termination (100Ω diff pair) is preferred over LVPECL's 50Ω-to-bias network | Choose DS4M125D+33 when interfacing with LVDS-receiving FPGAs or ASICs lacking PECL_BIAS capability |
Compared with Si5338A-D-GM and DS4M125D+33, the DS4M125P+33 delivers lowest jitter and simplest implementation for fixed 125MHz LVPECL systems-requiring no configuration, no external components beyond decoupling caps, and delivering guaranteed ±5% margining resolution out-of-the-box.
Availability
DS4M125P+33 is available at Aetrix Electronics and suitable for memory clocking, RAID systems, network-attached storage, and industrial data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DS4M125P+33 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 and mixed-signal ICs for industrial, communications, and computing applications, with expertise in timing, power, and interface solutions.
The DS4M125P+33 belongs to Maxim's margining clock oscillator product line, engineered specifically for system-level timing validation in high-reliability storage and networking infrastructure where deterministic frequency deviation is critical.
FAQ
What is the exact output frequency tolerance of DS4M125P+33 at room temperature?
The DS4M125P+33 has an initial frequency tolerance of ±20ppm at +25°C and VCC = 3.3V. This means the actual output frequency falls within 124.975MHz to 125.025MHz under nominal conditions, independent of margining mode. Total stability over temperature, aging, and supply variation is ±50ppm.
How does the MS pin on DS4M125P+33 implement three-level voltage control?
The MS pin on DS4M125P+33 interprets three distinct voltage ranges: low-level (0V to 0.25×VCC−0.15V), mid-level (0.25×VCC+0.15V to 0.75×VCC−0.15V), and high-level (0.75×VCC+0.15V to VCC). These thresholds enable precise selection of −5%, nominal, or +5% output frequency without external decoding logic.
Can DS4M125P+33 operate with a 2.5V supply instead of 3.3V?
No, DS4M125P+33 is specified only for 3.135V to 3.465V operation. Applying 2.5V violates the absolute maximum rating and will prevent proper LVPECL output biasing (which relies on PECL_BIAS = VCC−2.0V). Operation outside the 3.3V ±3.5% range may cause startup failure or unstable output.
What is the function of the exposed paddle (EP) on DS4M125P+33?
The exposed paddle (EP) on DS4M125P+33 is thermally connected to ground and must be soldered to a PCB ground plane. It reduces thermal resistance (θJA = 90°C/W) to maintain junction temperature below 125°C under full load, ensuring reliability in enclosed or high-ambient environments.
Does DS4M125P+33 require external loop filter components like a typical PLL-based oscillator?
No, DS4M125P+33 integrates all PLL loop filter components internally. The device combines an AT-cut crystal and fully self-contained PLL in a single 5mm × 3.2mm package-no external capacitors, resistors, or inductors are needed beyond standard VCC decoupling (0.01μF + 0.1μF).
DS4M125P+33 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Product Status:
- Obsolete
- Type:
- -
- Count:
- -
- Frequency:
- -
- Voltage - Supply:
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- Current - Supply:
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- Operating Temperature:
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- Supplier Device Package:
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- Mounting Type:
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- Grade:
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DS4M125P+33 FAQ
1.How can I place an order for DS4M125P+33 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS4M125P+33 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 DS4M125P+33 reliable?
The price and inventory of DS4M125P+33 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS4M125P+33 is usually 5 days.
3.What payment methods are accepted for DS4M125P+33?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS4M125P+33 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS4M125P+33?
DS4M125P+33 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS4M125P+33 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 DS4M125P+33?
For technical support, including DS4M125P+33 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS4M125P+33 requirements.
6.How does Aetrix verify that DS4M125P+33 is sourced from the original manufacturer or authorized distributors?
All DS4M125P+33 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 DS4M125P+33 meets industry standards.
7.What is the process for return or replacement of DS4M125P+33?
All DS4M125P+33 units undergo pre-shipment inspection (PSI). If there is an issue with DS4M125P+33, 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 DS4M125P+33 part is unused and in its original packaging.
Return procedure for DS4M125P+33:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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