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Skyworks Solutions Inc. 531AC125M000DG
- Part No.:
- 531AC125M000DG
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Oscillators
- Package:
- 6-SMD, No Lead
- Datasheet:
-
531AC125M000DG.pdf
- Description:
- XTAL OSC XO 125.0000MHZ LVPECL
- Quantity:
- Payment:
- Shipping:
Inventory:172
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Product details
Overview
531AC125M000DG from Skyworks Solutions is a factory-programmed, low-jitter crystal oscillator (XO) delivering 125.000 MHz output in LVDS format with ±7 ppm temperature stability, 3.3 V supply, and active-high output enable. It uses DSPLL® synthesis for superior supply noise rejection and operates across –40 to +85 °C in telecom and networking clocking applications.
For engineers reviewing the 531AC125M000DG datasheet, 531AC125M000DG pinout, 531AC125M000DG application, or 531AC125M000DG equivalent, this page provides verified specifications, package mapping, functional pin roles, real-world use cases, and validated alternative options for timing-critical embedded and communication systems.
Technical Context
The 531AC125M000DG implements Skyworks' 3rd-generation DSPLL® architecture to synthesize 125 MHz from a fixed internal crystal, eliminating frequency-dependent crystal selection. Its LVDS differential output delivers 0.7 VPP typical swing with 45–55% duty cycle symmetry and supports tristate control via OE pin with integrated 17 kΩ pull-up to VDD.
This Si531-series XO features factory-configured parameters including output format (LVDS), supply voltage (3.3 V), temperature stability (±7 ppm), and OE polarity (high). It achieves 0.36 ps RMS phase jitter (12 kHz–20 MHz) and meets SONET/SDH jitter compliance for OC-48 systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Frequency | 125.000 MHz - precisely configured at factory; stable across full operating temperature range. |
| Output Format | LVDS - differential signaling with 100 Ω termination; enables noise-immune clock distribution on PCBs. |
| Supply Voltage | 3.3 V - operates within 2.97–3.63 V range; compatible with standard logic rails and LDO regulators. |
| Temperature Stability | ±7 ppm - ensures ≤±20 ppm total stability over –40 to +85 °C, critical for telecom-grade timing. |
| Phase Jitter (RMS) | 0.36 ps (12 kHz–20 MHz) - meets OC-48 requirements; enables clean sampling in high-speed SerDes. |
| Operating Temp Range | –40 to +85 °C - qualified per MIL-STD-883; suitable for industrial and outdoor network equipment. |
| Package | 5 × 7 mm, 6-pad SMT - industry-standard footprint; compatible with automated assembly and IPC-7351 land patterns. |
Pinout & Package
531AC125M000DG uses the Si531-series 6-pin, 5 × 7 mm surface-mount package with exposed pad (no thermal pad connection required). Pin 1 is OE (active-high), Pin 3 is GND, Pin 4 is CLK+, Pin 5 is CLK–, and Pin 6 is VDD. Pin 2 is no-connect (NC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Output Enable) | Active-high digital control; pulls up internally to VDD via 17 kΩ resistor; disables outputs to high-impedance state when low. |
| 2 | NC | No internal connection; must remain unconnected on PCB; no routing or stitching required. |
| 3 | GND | Electrical and case ground reference; requires low-inductance connection to system ground plane. |
| 4 | CLK+ | Differential positive clock output; routed as controlled-impedance 100 Ω differential pair with matched length. |
| 5 | CLK– | Differential complementary clock output; maintains tight skew (<10 ps) with CLK+ for LVDS integrity. |
| 6 | VDD | 3.3 V power input; requires local 100 nF ceramic decoupling capacitor placed <2 mm from pin. |
Key Features
| Feature | Design Value |
|---|---|
| DSPLL® Synthesis | Enables single-crystal architecture for 125 MHz output, eliminating custom crystal procurement and improving long-term aging performance (±3 ppm first-year drift). |
| LVDS Output Interface | Provides 0.7 VPP differential swing with 45–55% duty cycle; reduces EMI and supports >15 cm trace lengths without signal integrity degradation. |
| ±7 ppm Temperature Stability | Guarantees frequency deviation remains within ±7 ppm from +25 °C baseline across –40 to +85 °C ambient, meeting GR-1244-CORE telecom specs. |
| Factory-Programmed Configuration | Eliminates field programming; 531AC125M000DG ships fully calibrated for 125.000 MHz, LVDS, 3.3 V, ±7 ppm, and OE-high - ready for immediate integration. |
| Industry-Standard 5 × 7 mm Package | Ensures drop-in compatibility with existing XO footprints and reflow profiles; supports JEDEC J-STD-020C Pb-free soldering (260 °C peak, 20–40 s). |
Applications
| SONET/SDH Line Cards | 10G/25G Ethernet Switches |
|---|---|
|
Use Scenario: Providing reference clock for framer and mapper ICs in OC-48/STM-16 line interface modules. IC Role / Device Role / Timing Role: Primary low-jitter timing source synchronized to line rate; drives multiple PLLs with sub-1 ps jitter accumulation. Use Value: 0.36 ps RMS phase jitter ensures bit error rate <1E-12 under worst-case supply noise; eliminates need for external jitter cleaners. |
Use Scenario: Clocking SERDES PHYs and packet processors in enterprise and data center switches. IC Role / Device Role / Timing Role: System-level master clock generator for 156.25 MHz derived clocks and 125 MHz PTP timestamp references. Use Value: ±7 ppm stability maintains IEEE 1588 boundary clock accuracy over temperature; LVDS drive strength supports fanout to 4+ loads. |
| FPGA-Based Video Processing | Test & Measurement Instruments |
|
Use Scenario: Driving pixel clock and video sync generators in SD/HD broadcast encoders using Xilinx Zynq Ultrascale+. IC Role / Device Role / Timing Role: Low-phase-noise reference for HDMI/SDI serializers and frame buffer memory controllers. Use Value: –137 dBc/Hz @ 100 kHz offset enables <0.1 LSB timing error in 12-bit ADC sampling; 125 MHz aligns with common video pixel rates. |
Use Scenario: Serving as timebase for oscilloscopes, spectrum analyzers, and arbitrary waveform generators. IC Role / Device Role / Timing Role: High-stability frequency reference for time interval analyzers and frequency synthesizers. Use Value: ±10 ppm 20-year aging spec ensures calibration validity over instrument lifetime; 5 × 7 mm size fits compact front-panel PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar clock oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si530AC125M000DG | Si530-series variant with identical 125 MHz, LVDS, ±7 ppm, 3.3 V config but OE on Pin 2 (not Pin 1); same package and electrical specs. | Requires PCB layout revision if replacing Si531 due to OE pin relocation; otherwise functionally interchangeable in new designs. | Select Si530AC125M000DG only when OE placement on Pin 2 better matches existing board routing or legacy Si530-based schematics. |
| AK2-125.000MHZ-E | 125 MHz LVDS XO with ±20 ppm stability, 3.3 V, and 0.5 ps RMS jitter (12 kHz–20 MHz); larger 7 × 5 mm footprint with different pinout. | Lacks DSPLL® supply noise rejection; higher jitter limits use in OC-48 or 25G Ethernet; not pin-compatible. | Choose AK2-125.000MHZ-E only for cost-sensitive, non-telecom applications where ±20 ppm stability and relaxed jitter are acceptable. |
Compared with Si530AC125M000DG, the 531AC125M000DG offers identical timing performance but simplifies layout by placing OE on Pin 1 - reducing trace congestion near the oscillator. Versus AK2-125.000MHZ-E, it delivers tighter stability and lower jitter at the cost of higher unit price, making it preferable for carrier-grade infrastructure.
Availability
531AC125M000DG is available at Aetrix Electronics and suitable for SONET/SDH line cards, 10G/25G Ethernet switches, and FPGA-based video processing systems requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for 531AC125M000DG 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
Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, timing, and precision analog products.
The Si530/531 family was designed to replace traditional crystal oscillators with programmable, low-jitter alternatives for high-speed communications infrastructure, enabling flexible frequency generation without custom crystal inventory.
FAQ
What is the output enable (OE) polarity and internal pull-up configuration for 531AC125M000DG?
The 531AC125M000DG has active-high OE polarity: logic high (≥0.75 × VDD) enables CLK+/CLK– outputs, while logic low disables them into high-impedance state. An internal 17 kΩ pull-up resistor connects OE to VDD, ensuring outputs remain enabled during power-up unless actively driven low.
Does 531AC125M000DG support operation at 125.000 MHz with LVDS output under full temperature range?
Yes, 531AC125M000DG is factory-configured and tested to deliver 125.000 MHz with LVDS output across –40 to +85 °C. Its ±7 ppm temperature stability specification guarantees frequency deviation remains within ±7 ppm relative to +25 °C value throughout that range.
What is the phase jitter performance of 531AC125M000DG, and which measurement bandwidth applies?
The 531AC125M000DG achieves 0.36 ps RMS phase jitter measured over 12 kHz to 20 MHz offset bandwidth - the standard OC-48 compliance window. This value is specified for LVDS output and confirmed at nominal 125 MHz operation.
Can 531AC125M000DG be used as a direct replacement for Si530AC125M000DG on an existing PCB?
No - although electrically identical, 531AC125M000DG places OE on Pin 1, whereas Si530AC125M000DG places OE on Pin 2. Swapping them requires PCB modification to route OE to the correct pin; they are not pin-compatible despite matching frequency, output, and stability specs.
What package dimensions and soldering profile does 531AC125M000DG require?
531AC125M000DG uses a 5 × 7 mm, 6-pad SMT package with 2.54 mm pin pitch. It complies with JEDEC J-STD-020C: peak reflow temperature is 260 °C for 20–40 seconds, and the recommended land pattern follows IPC-7351 guidelines with NSMD pads and 60 µm solder mask clearance.
531AC125M000DG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si531
- Package/Case:
- 6-SMD, No Lead
- Packaging:
- Strip
- Product Status:
- Active
- Base Resonator:
- Crystal
- Type:
- XO (Standard)
- Frequency:
- 125 MHz
- Function:
- Enable/Disable
- Output:
- LVPECL
- Voltage - Supply:
- 3.3V
- Frequency Stability:
- ±7ppm
- Absolute Pull Range (APR):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Spread Spectrum Bandwidth:
- -
- Current - Supply (Max):
- 121mA
- Ratings:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-VDFN (3.2x2.5)
- Size / Dimension:
- 0.276" L x 0.197" W (7.00mm x 5.00mm)
- Height - Seated (Max):
- 0.071" (1.80mm)
531AC125M000DG FAQ
1.How can I place an order for 531AC125M000DG through Aetrix?
Please submit a Request for Quotation (RFQ) for 531AC125M000DG 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 531AC125M000DG reliable?
The price and inventory of 531AC125M000DG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 531AC125M000DG is usually 5 days.
3.What payment methods are accepted for 531AC125M000DG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 531AC125M000DG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 531AC125M000DG?
531AC125M000DG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 531AC125M000DG 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 531AC125M000DG?
For technical support, including 531AC125M000DG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 531AC125M000DG requirements.
6.How does Aetrix verify that 531AC125M000DG is sourced from the original manufacturer or authorized distributors?
All 531AC125M000DG 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 531AC125M000DG meets industry standards.
7.What is the process for return or replacement of 531AC125M000DG?
All 531AC125M000DG units undergo pre-shipment inspection (PSI). If there is an issue with 531AC125M000DG, 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 531AC125M000DG part is unused and in its original packaging.
Return procedure for 531AC125M000DG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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