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HomeProductsCrystals, Oscillators, ResonatorsOscillators358C1485B3C3T
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358C1485B3C3T - CTS-Frequency Controls

Manufacturer Part Number
358C1485B3C3T
Manufacturer
CTS Corporation
Allelco Part Number
98D-358C1485B3C3T
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
28,049 pcs available, New & Original
Parts Description
XTAL OSC VCXO 148.5000MHZ HCMOS
Package
6-SMD, No Lead
Data sheet
358C1485B3C3T.pdf

Datasheets

358C Model.pdf
RoHs Status
ROHS3 Compliant
Compare
Our certification
In stock: 28049
  • Unit Price: $2.518
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $2.518 $2.52
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

358C1485B3C3T Tech Specifications
CTS-Frequency Controls - 358C1485B3C3T technical specifications, attributes, parameters and parts with similar specifications to CTS-Frequency Controls - 358C1485B3C3T

Product Attribute Attribute Value
Manufacturer CTS Corporation
Voltage - Supply 3.3V
Type VCXO
Spread Spectrum Bandwidth -
Size / Dimension 0.197" L x 0.126" W (5.00mm x 3.20mm)
Series 358C
Ratings -
Package / Case 6-SMD, No Lead
Package Tape & Reel (TR)
Output HCMOS
Product Attribute Attribute Value
Operating Temperature -20°C ~ 70°C
Mounting Type Surface Mount
Height - Seated (Max) 0.051" (1.30mm)
Function Enable/Disable
Frequency Stability ±50ppm
Frequency 148.5 MHz
Current - Supply (Max) 65mA
Current - Supply (Disable) (Max) 22mA
Base Resonator Crystal
Absolute Pull Range (APR) ±50ppm

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Frequently Asked Questions(FAQ)

What are the key electrical characteristics of the 358C1485B3C3T VCXO that influence clock distribution in a 1080p video capture system?
The 358C1485B3C3T operates at a nominal frequency of 148.5 MHz with a supply voltage of 3.3V and delivers HCMOS output suitable for digital timing applications. Its ±50 ppm frequency stability ensures minimal clock drift over temperature, which is critical for maintaining pixel alignment in high-definition video synchronization. The device consumes up to 65 mA when enabled and reduces current to 22 mA in disable mode, enabling power-conscious designs where dynamic clock gating can extend battery life or reduce thermal load.
How does the enable/disable function on the 358C1485B3C3T improve system-level reliability compared to always-on oscillators?
The active control via the enable pin allows the 358C1485B3C3T to be powered down during idle periods, reducing standby power draw from 65 mA to 22 mA. This feature minimizes electromagnetic interference and heat generation in systems like set-top boxes or media players that experience intermittent operation cycles. By decoupling the oscillator from the main clock tree when not needed, designers can enhance signal integrity and simplify power management without sacrificing phase noise performance.
Can the 358C1485B3C3T support spread spectrum clocking (SSC), and what would be the implications if it cannot?
No, the 358C1485B3C3T does not support spread spectrum modulation as indicated by the absence of specified bandwidth parameters. In EMI-sensitive environments such as broadcast equipment or medical imaging devices, this limits its suitability unless paired with external SSC circuitry. Without intentional jitter spreading, conducted emissions near harmonic frequencies—such as 148.5 MHz and its multiples—may require additional filtering or layout considerations to meet regulatory standards like FCC Part 15 or CISPR 32.
In what way does the absolute pull range (APR) of ±50 ppm affect tuning flexibility when using the 358C1485B3C3T in a variable-rate display interface?
The ±50 ppm APR defines the maximum achievable frequency deviation under controlled voltage tuning, allowing the 358C1485B3C3T to adjust its output within a narrow band around 148.5 MHz. For applications requiring adaptive pixel clocks—such as HDMI-to-DVI conversion—this range must accommodate minor timing mismatches without losing lock or introducing artifacts. If the required pull exceeds ±50 ppm, alternative VCXOs with wider APRs would be necessary to maintain stable synchronization across varying refresh rates or color formats.
How should the operating temperature specification (-20°C to 70°C) impact placement and thermal management when integrating the 358C1485B3C3T into an industrial-grade embedded vision system?
While the -20°C to 70°C range covers many commercial and light industrial scenarios, sustained exposure near the upper limit may degrade long-term frequency stability due to crystal aging effects and component derating. In compact enclosures with poor airflow, adjacent high-power regulators or processors could elevate local temperatures beyond the recommended ambient, potentially pushing the junction above 70°C indirectly. Thermal simulation or margin-based design practices should verify that worst-case operating conditions remain well within spec, especially during continuous operation.
Compare the current consumption profiles of the 358C1485B3C3T in enabled versus disabled states and explain their relevance in low-power video processing designs.
When active, the 358C1485B3C3T draws up to 65 mA at 3.3V, contributing significantly to total system power budget. Upon disabling, current drops sharply to 22 mA maximum, preserving energy during inactive intervals. This distinction enables architects to implement duty-cycled clocking strategies in battery-powered devices like handheld decoders or portable test equipment, where minimizing average current directly extends operational lifetime without compromising instantaneous performance when full-speed decoding is required.
What layout precautions are essential when routing signals near the 358C1485B3C3T to prevent degradation of its 148.5 MHz HCMOS output?
Given its high-frequency operation and sensitivity to parasitic capacitance, the 358C1485B3C3T demands careful PCB layout: keep clock traces short and impedance-controlled, avoid parallel routing with noisy lines such as switching regulators, and place bypass capacitors (typically 0.1 µF ceramic) as close as possible to VCC and GND pins. Ground planes beneath the oscillator footprint help contain radiation and reduce ground bounce, while minimizing loop area on return paths suppresses inductive coupling that could induce jitter or overshoot.
Why might the 358C1485B3C3T be preferred over a standard crystal oscillator for applications demanding fine frequency adjustment?
Unlike fixed-frequency crystals, the 358C1485B3C3T incorporates varactor-tuned voltage control, enabling real-time frequency trimming via an external DC voltage. This capability is invaluable in systems requiring precise timing calibration—such as cable television settop boxes compensating for transmission delays—where the ±50 ppm tuning range allows fine-grained correction without replacing hardware. Combined with its enable feature and CMOS compatibility, it offers a compact, programmable solution absent in conventional XO implementations.
How does the Moisture Sensitivity Level (MSL) rating of 1 benefit manufacturing integration of the 358C1485B3C3T?
With an MSL of 1, the 358C1485B3C3T is exempt from bake-before-reflow requirements and can be stored indefinitely under normal conditions, simplifying inventory management and assembly scheduling. This characteristic supports just-in-time production models and reduces handling complexity in high-volume environments like consumer electronics assembly, where rapid turnover and minimal lead times are prioritized without risk of moisture-induced cracking during soldering.
What role does the 0.197" x 0.126" package size play in board space optimization for dense FPGA-based media converters using the 358C1485B3C3T?
Measuring 5.00 mm × 3.20 mm, the 6-SMD footprint of the 358C1485B3C3T occupies relatively little real estate, making it ideal for compact form factors such as USB-attached video adapters or small-form-factor transceivers. Its thin profile (1.30 mm max height) facilitates stacking with other surface-mount components, supporting miniaturized designs without sacrificing access to critical signals like EN or VC. This spatial efficiency complements high-density FPGAs commonly used in real-time video protocol translation tasks.
How does the RoHS3 compliance status of the 358C1485B3C3T align with modern environmental regulations in European and North American markets?
As a RoHS3 compliant part, the 358C1485B3C3T adheres to the latest restrictions on hazardous substances including lead, mercury, cadmium, and certain phthalates, ensuring market access across jurisdictions enforcing strict chemical content limits. This compliance simplifies supply chain validation and avoids potential penalties or redesign costs associated with non-conforming components, particularly important for end products destined for regulated industries such as automotive or medical instrumentation.
What considerations apply when cascading multiple clock domains using the 358C1485B3C3T in a multi-channel audio-video capture card?
When synchronizing multiple channels, each instance of the 358C1485B3C3T must share a common reference or be disciplined via phase-locked loops to prevent skew accumulation. Since the device lacks built-in jitter attenuation beyond its inherent stability, designers should evaluate accumulated phase error over serial data links or memory interfaces. Additionally, simultaneous enable/disable transitions across channels could introduce glitches; thus, staggered control signaling or buffered enable lines may be required to maintain coherent timing relationships.
Compare the suitability of the 358C1485B3C3T against a general-purpose 148.5 MHz crystal oscillator in terms of phase noise and startup time for broadcast-quality signal acquisition.
The 358C1485B3C3T typically exhibits lower phase noise than equivalent crystal oscillators due to integrated feedback networks and optimized resonator coupling, yielding cleaner rise/fall edges at 148.5 MHz. Furthermore, its fast startup—often under 1 ms—enables quicker system wake-up compared to passive crystals requiring longer settling. However, this advantage comes at the cost of higher quiescent current and limited tuning range, meaning the 358C1485B3C3T excels in applications prioritizing speed and spectral purity over ultra-low power or wideband agility.
How does the absence of specified spread spectrum bandwidth impact compliance testing when deploying systems containing the 358C1485B3C3T?
Because no spread spectrum capability is defined, radiated emissions tests must assume worst-case spectral density at fundamental harmonics, increasing the likelihood of failing pre-compliance scans near 148.5 MHz or its integer multiples. Mitigation strategies include careful PCB grounding, ferrite beads on power rails, and shielding cans if space permits. Designers should also confirm whether their target market mandates SSC (e.g., some HDMI transmitters), as failure to address this could necessitate external jitter modulation circuits post-layout.
What are the implications of the HTSUS code 8542.39.0001 for global sourcing decisions involving the 358C1485B3C3T?
Classified under HTSUS 8542.39.0001, the 358C1485B3C3T falls under “Electronic Integrated Circuits” with no specific export controls, facilitating relatively unrestricted trade between major economies. This classification simplifies customs documentation and reduces the risk of unexpected tariffs or licensing requirements, supporting agile procurement across suppliers in Asia, Europe, and North America without complicating logistics for commercial end-use applications.
In a scenario where frequency accuracy must exceed ±50 ppm, how would one modify a design using the 358C1485B3C3T?
To achieve better than ±50 ppm accuracy, the 358C1485B3C3T would need to operate within a tightly controlled environment—narrowing the temperature range or applying calibration algorithms—since its inherent stability is capped at ±50 ppm. Alternatively, replacing it with a temperature-compensated crystal oscillator (TCXO) or oven-controlled oscillator (OCXO) would be necessary. The 358C1485B3C3T remains viable only if ±50 ppm meets system tolerance, highlighting the importance of early specification mapping before committing to part selection.
How does the ECCN designation EAR99 affect international shipments of products incorporating the 358C1485B3C3T?
With an ECCN of EAR99, the 358C1485B3C3T is subject to U.S. Export Administration Regulations but qualifies for most license-free exports and re-exports under General License provisions. This simplifies shipping logistics to nearly all destinations except embargoed regions, reducing administrative overhead and accelerating time-to-market for globally distributed products such as consumer electronics or industrial automation gear.
What trade-offs exist between using the 358C1485B3C3T and discrete crystal + amplifier solutions for generating a 148.5 MHz clock in a cost-sensitive HDTV tuner design?
While discrete crystal oscillators may offer marginally lower unit cost, they lack integrated enable logic, voltage control, and output buffering, requiring additional ICs for similar functionality. The 358C1485B3C3T consolidates these features into a single package, reducing BOM count, board space, and assembly complexity. Although its price per unit is higher, the net savings in layout effort, test time, and reliability often justify adoption in medium- to high-volume production, especially where integration benefits outweigh incremental material costs.

Parts with Similar Specifications

The three parts on the right have similar specifications to CTS-Frequency Controls 358C1485B3C3T

Product Attribute 358C1485B3C2T 358C1485B5C3T 358C1485B4C3T 358C1485B3I3T
Part Number 358C1485B3C2T 358C1485B5C3T 358C1485B4C3T 358C1485B3I3T
Manufacturer CTS-Frequency Controls CTS-Frequency Controls CTS-Frequency Controls CTS-Frequency Controls
Current - Supply (Disable) (Max) - - - -
Spread Spectrum Bandwidth - - - -
Size / Dimension - - - -
Voltage - Supply - - - -
Series - - - -
Frequency Stability - - - -
Function - - - -
Ratings - - - -
Current - Supply (Max) - - - -
Absolute Pull Range (APR) - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Mounting Type - Surface Mount Through Hole Surface Mount
Frequency - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Type - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Output - - - -
Height - Seated (Max) - - - -
Base Resonator - - - -

358C1485B3C3T Datasheet PDF

Download 358C1485B3C3T pdf datasheets and CTS-Frequency Controls documentation for 358C1485B3C3T - CTS-Frequency Controls.

Datasheets
358C Model.pdf
Environmental Information
RoHS Filters, Crystals, Oscillators.pdf CTS Corp REACH.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Arch***ct
    Jul 15, 2026

    Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.

  • FPGA***lorer88
    Jul 7, 2026

    The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.

  • Nath***oleman
    Jun 29, 2026

    Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.

  • Emil***rperTech
    Jun 23, 2026

    Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

  • Liam***terTech
    Jun 15, 2026

    Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

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1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
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CTS-Frequency Controls

358C1485B3C3T

CTS-Frequency Controls
98D-358C1485B3C3T

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