Skyworks Solutions Inc. 552AD000736DG

Overview

552AD000736DG from Skyworks Solutions is a dual-frequency voltage-controlled crystal oscillator (VCXO) with factory-programmed output frequencies of 125 MHz and 156.25 MHz, 3.3 V LVPECL output, ±50 ppm temperature stability, 90 ppm/V tuning slope, and operation from –40 to +85 °C in a 5 × 7 mm surface-mount package. It delivers ultra-low phase jitter (0.37 ps RMS, 12 kHz–20 MHz) for clock recovery in 10 GbE LAN/WAN systems.

For engineers reviewing the 552AD000736DG datasheet, 552AD000736DG pinout, 552AD000736DG application, or 552AD000736DG equivalent, this page provides verified electrical specs, dual-frequency switching behavior, DSPLL®-based supply noise rejection, and real-world timing performance data required for SONET/SDH and optical module design.

Technical Context

The 552AD000736DG implements Skyworks' third-generation DSPLL® architecture, using a fixed internal crystal reference to synthesize two discrete output frequencies (125 MHz and 156.25 MHz) via digital frequency selection controlled by the FS pin. Its analog VC input enables fine-tuning over ±100 ppm absolute pull range with 90 ppm/V slope.

Unlike SAW-based VCXOs, the 552AD000736DG achieves superior supply noise rejection and 3× better frequency stability due to its IC-based synthesis and internal fixed-crystal resonator. Output format is LVPECL, supporting differential signaling with 1.1–1.9 VPP swing and 45–55% duty cycle symmetry at 3.3 V.

Key Specifications

Pinout & Package

552AD000736DG is housed in an industry-standard 6-pad, 5 × 7 mm surface-mount package (RoHS-compliant, Pb-free). Pin layout follows top-view orientation with Pin 1 marked by dot.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-frequency VCXO applications.

Compared with Si552AD000108DGR, 552AD000736DG offers lower-frequency dual outputs optimized for 10G/1G Ethernet PHY layers rather than high-speed SerDes, while retaining identical DSPLL® jitter performance and thermal stability. Unlike Si53204-A01774-GM, it provides true analog voltage tuning and simpler hardware-only frequency switching.

Availability

552AD000736DG is available at Aetrix Electronics and suitable for SONET/SDH line cards, xDSL central office equipment, and 10 GbE optical transceivers requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for 552AD000736DG 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 for communications infrastructure, automotive, and industrial markets.

The Si552 product line was designed specifically for high-reliability, low-jitter dual-frequency clock generation in telecom and datacom systems where traditional SAW VCXOs fail to meet phase noise and stability requirements.

FAQ

What are the exact dual output frequencies programmed in 552AD000736DG?

The 552AD000736DG is factory-programmed with two precise output frequencies: 125.000000 MHz when the FS pin is logic low (0), and 156.250000 MHz when FS is logic high (1). These values are confirmed in Skyworks' official ordering documentation for the six-digit frequency code "000736", and are traceable to the device's internal DSPLL® configuration.

Does 552AD000736DG support CMOS output format?

No, 552AD000736DG does not support CMOS output. Per Skyworks' part number convention, the "A" in position 4 of 552AD000736DG denotes 3.3 V LVPECL output. CMOS variants use codes "C" (3.3 V), "G" (2.5 V), or "J" (1.8 V), and are limited to ≤160 MHz-making them unsuitable for this specific dual-frequency configuration.

What is the Absolute Pull Range (APR) of 552AD000736DG, and how is it calculated?

The 552AD000736DG has a minimum Absolute Pull Range of ±100 ppm. This is derived from its 90 ppm/V tuning slope and 3.3 V supply: nominal pull range = 0.5 × 3.3 V × 90 ppm/V = ±148.5 ppm, then subtracting ±50 ppm temperature stability and ±10 ppm 15-year aging yields ±100 ppm APR-matching Skyworks' published specification for Option Code "D".

Can the FS pin of 552AD000736DG be left floating, or does it require a defined logic level?

The FS pin of 552AD000736DG must not be left floating. It includes an internal 17 kΩ pull-up resistor to VDD, so an unconnected FS defaults to logic high (156.25 MHz output). To select 125 MHz, FS must be actively driven low (≤0.5 V). For robust operation in noisy environments, a series resistor (e.g., 100 Ω) is recommended to limit transient current.

Is 552AD000736DG qualified for extended temperature operation beyond –40 to +85 °C?

No, 552AD000736DG is rated only for –40 to +85 °C ambient operation, as indicated by the "G" suffix in its part number. Skyworks does not offer extended-temperature variants of the Si552 family; devices intended for >85 °C operation require alternative timing solutions such as oven-controlled oscillators (OCXOs) or specialized high-temp VCXOs.