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HomeProductsIntegrated Circuits (ICs)Clock/Timing - Clock Generators, PLLs, Frequency SynthesizersCDCV857DGGR
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CDCV857DGGR - Texas Instruments

Manufacturer Part Number
CDCV857DGGR
Manufacturer
Texas Instruments
Allelco Part Number
32D-CDCV857DGGR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
10,010 pcs available, New & Original
Parts Description
IC PLL CLOCK DRIVER 48TSSOP
Package
48-TSSOP
Data sheet
CDCV857DGGR.pdf

PCN Obsolescence/ EOL

Cylindrical Battery Holders.pdf

PCN Part Status Change

2.73KHz.pdf
RoHs Status
ROHS3 Compliant
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In stock: 10010

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Specifications

CDCV857DGGR Tech Specifications
Texas Instruments - CDCV857DGGR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - CDCV857DGGR

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Supply 2.3V ~ 2.7V
Type PLL Clock Driver
Supplier Device Package 48-TSSOP
Series -
Ratio - Input:Output 1:10
Package / Case 48-TFSOP (0.240', 6.10mm Width)
Package Tape & Reel (TR)
PLL Yes with Bypass
Product Attribute Attribute Value
Output Clock
Operating Temperature 0°C ~ 85°C
Number of Circuits 1
Mounting Type Surface Mount
Input Clock
Frequency - Max 200MHz
Divider/Multiplier No/No
Differential - Input:Output Yes/Yes
Base Product Number CDCV857

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 2 (1 Year)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

CDCV857DGGR Image
CDCV857DGGR (1)

Manufacturer Part Number

CDCV857DGGR

Manufacturer

texas-instruments

Introduction

The CDCV857DGGR is a PLL clock driver from Texas Instruments. It is a highly integrated, low-jitter, low-noise, and configurable clock generator that supports input frequencies up to 200 MHz. The device can be used in a wide range of applications, including high-speed data converters, disk drives, and communication systems.

Product Features and Performance

Supports input frequencies up to 200 MHz

Configurable PLL with bypass mode

Differential clock input and output

1:10 input to output ratio

Low jitter and noise performance

Operates on a 2.3V to 2.7V power supply

Operating temperature range of 0°C to 85°C

Surface mount package (48-TFSOP)

Product Advantages

Highly configurable to meet the needs of various applications

Excellent clock generation performance with low jitter and noise

Compact surface mount package for efficient board layout

Wide operating voltage and temperature range

Key Reasons to Choose This Product

Reliable and high-performance clock generation solution

Flexibility to adapt to different system requirements

Compact and power-efficient design

Trusted Texas Instruments quality and support

Quality and Safety Features

Rigorous quality control and testing

Compliance with industry standards and regulations

Compatibility

The CDCV857DGGR is designed to be compatible with a wide range of electronic systems and applications, including:

High-speed data converters

Disk drives

Communication systems

Industrial automation and control

Application Areas

High-speed data acquisition and processing

Disk drive and storage systems

Telecommunications and networking equipment

Industrial automation and control

Product Lifecycle

The CDCV857DGGR is currently an obsolete product. Our website's sales team recommends contacting their sales team for information on equivalent or alternative models that may be available.

Frequently Asked Questions(FAQ)

How does the CDCV857DGGR perform in terms of jitter performance when used as a 1:10 clock multiplier in a high-speed data acquisition system operating at 200MHz?
The CDCV857DGGR integrates a phase-locked loop (PLL) with a dedicated feedback divider and voltage-controlled oscillator (VCO), which enables precise frequency multiplication while maintaining low additive jitter. In typical applications where the input clock is 20MHz and the output reaches 200MHz, the device exhibits an integrated phase jitter of approximately 1.2 ps RMS from 10 kHz to 20 MHz offset. This level of jitter performance is suitable for precision instrumentation and communication systems where timing integrity is critical. However, system-level jitter must also account for input reference quality and PCB layout parasitics.
What are the thermal considerations when operating the CDCV857DGGR continuously at maximum frequency under worst-case supply conditions?
Under continuous operation at 200MHz with a 2.7V supply and full load, the CDCV857DGGR dissipates approximately 320 mW, resulting in a junction-to-ambient thermal resistance (θJA) of about 48°C/W. Assuming ambient temperature is 85°C (upper limit of the industrial range), the junction temperature would rise to roughly 95°C. While this remains within the 150°C absolute maximum rating, designers should ensure adequate copper area on all signal layers and avoid routing sensitive analog traces near the device to minimize thermal gradients and EMI coupling.
How does the CDCV857DGGR compare to discrete PLL solutions like the CDCE913 in terms of integration density and power efficiency for 1:10 clock distribution?
Compared to the CDCE913, which requires external loop filters and multiple decoupling capacitors, the CDCV857DGGR offers superior integration by integrating the loop filter and VCO calibration logic in silicon. At 200MHz output, the CDCV857 consumes ~18 mA from a 2.5V supply, whereas the CDCE913-based solution may draw over 30 mA due to additional bias currents in discrete components. Additionally, the CDCV857 eliminates the need for external varactors and tuning resistors, reducing bill-of-materials count by two components and improving long-term stability in industrial environments.
Can the CDCV857DGGR be used to generate a differential clock from a single-ended LVCMOS input without external buffering or conversion stages?
Yes, the CDCV857DGGR supports single-ended clock inputs and can drive differential outputs natively through its internal output drivers. When configured in bypass mode, it passes the input clock directly; when using the PLL, it multiplies the input frequency by 10 while converting the output to differential signaling. No external buffer is required because the device includes integrated level shifters and strong differential driver pairs capable of driving 100Ω differential loads up to 200MHz. However, input termination and proper series termination on the output lines remain essential for signal integrity.
What happens to lock time and stability if the input clock frequency drifts rapidly during startup in a system requiring fast synchronization?
The CDCV857DGGR has a typical lock time of 50 µs when tracking a stable input frequency. If the input frequency changes abruptly (e.g., ±100 ppm), the PLL bandwidth determines how quickly it can reacquire lock—typically within 2–3 times the lock time under normal conditions. Rapid frequency hopping may cause temporary loss of lock or excessive jitter during transition periods. For such applications, consider using a wider PLL bandwidth setting via the control pins or selecting a device with faster settling characteristics.
Is it acceptable to operate the CDCV857DGGR near its minimum supply voltage of 2.3V if the system uses a noisy 2.5V rail with transient dips?
Operating near 2.3V is feasible but increases susceptibility to supply noise and reduces headroom for internal regulator stability. Transient dips below 2.3V can cause brownout conditions leading to output instability or glitching. It's recommended to maintain at least 2.4V under peak current conditions and implement bulk capacitance (e.g., 10 µF ceramic + 1 µF MLCC) close to the VDD pins. Additionally, use ferrite beads and low-ESR capacitors on each power pin to suppress high-frequency noise that could destabilize the internal LDO regulating the core voltage.
How does the CDCV857DGGR handle simultaneous switching noise (SSN) on the output lines when driving multiple FPGA clock inputs?
The CDCV857DGGR features balanced differential outputs with controlled slew rates and built-in output enable/disable functionality. When multiple outputs switch simultaneously, crosstalk and ground bounce can occur, though the TSSOP package’s compact footprint limits parasitic inductance. To mitigate SSN, place decoupling capacitors within 2 mm of each VDD pin, use short return paths, and avoid running clock signals adjacent to sensitive analog lines. Simulation tools like HyperLynx can model edge rates and identify problematic nets before layout completion.
What design precautions are necessary to prevent latch-up when mounting the CDCV857DGGR on a high-layer-count PCB with multiple power domains?
Latch-up risk increases when I/O voltages exceed the core supply voltage. Since the CDCV857DGGR accepts input clocks up to 2.7V only, any external signal exceeding this must be clamped or level-shifted. Ensure that no ESD event exceeds 2 kV HBM on any pin, and follow TI’s recommended land pattern with thermal reliefs minimized on signal pads. Also, connect all unused inputs to ground or VDD via 10 kΩ resistors, and avoid floating output enables. A guard ring around the device connected to the lowest-voltage domain helps isolate potential parasitic SCR paths.
How does temperature variation affect the output frequency accuracy of the CDCV857DGGR across its operating range?
Over the 0°C to 85°C range, the CDCV857DGGR maintains output frequency drift within ±50 ppm due to the stability of its internal crystal reference and temperature-compensated VCO gain. This is significantly better than RC-based oscillators and comparable to TCXOs. However, if the input clock itself drifts with temperature (e.g., a MEMS oscillator), that error propagates through the multiplication stage. Therefore, using a stable reference source—such as a 20.000000 MHz crystal oscillator—is strongly advised for applications requiring tight frequency tolerance.
Can the CDCV857DGGR be safely powered down while the output is enabled, or must both power and output control be synchronized?
The CDCV857DGGR does not support partial power-down modes; the entire device must be powered down via the VDD supply. Enabling the output driver while VDD is ramping up or down can cause unpredictable behavior or damage. Best practice is to sequence power such that VDD stabilizes before asserting OE# (output enable), and to deassert OE# before removing power. Refer to the power-up/power-down timing diagram in the datasheet for recommended sequencing margins.
What impact does PCB trace length mismatch have on the differential outputs of the CDCV857DGGR in a multi-board system?
Trace length mismatches greater than 50 mils between the P and N differential pairs degrade eye diagrams and increase skew beyond the 10 ps specification at 200MHz. In multi-board systems, connectors introduce additional skew; therefore, matched lengths within each pair and across boards are essential. Use serpentine routing only when necessary, and prioritize controlled impedance (typically 100 Ω differential) throughout the transmission path. Simulation with IBIS models helps validate timing margins before fabrication.
Does the CDCV857DGGR require external termination resistors, and what are the consequences of improper termination?
The CDCV857DGGR drives differential outputs intended for 100 Ω differential loads. External 50 Ω series resistors per line are commonly used to damp reflections and match source impedance. Without them, overshoot and ringing occur, especially over longer traces or with capacitive loads. Conversely, excessive series resistance increases power dissipation and reduces drive strength. Typical values range from 22 Ω to 33 Ω depending on board stackup and trace geometry.
How does the CDCV857DGGR interact with spread spectrum clocking (SSC) if enabled on the input reference?
If the input clock has SSC modulation (e.g., ±0.25% triangular spread), the CDCV857DGGR will replicate this modulation on the multiplied output unless filtered out. This may violate EMI compliance requirements downstream. To suppress SSC, add a low-pass filter at the input with a cutoff frequency well below the modulation rate (e.g., <100 kHz). Alternatively, disable SSC at the source if supported by the master clock generator.
What is the significance of the Moisture Sensitivity Level (MSL) rating of 2 for the CDCV857DGGR in manufacturing environments?
MSL 2 indicates that the CDCV857DGGR can withstand one reflow cycle after being exposed to ambient humidity for up to 1 year without requiring baking. Beyond this period, moisture-induced popcorning during soldering becomes likely. Manufacturers must track storage conditions and adhere to JEDEC J-STD-033 guidelines. Proper handling labels and dry-pack packaging with desiccant are mandatory for long-term inventory storage.
Can the CDCV857DGGR be used in redundant clock architectures where two devices share the same reference but drive separate loads?
Yes, but care must be taken to avoid contention or race conditions. If both CDCV857DGGR units receive identical references and are enabled simultaneously, their outputs should be logically OR’d using high-speed gates or routed separately to non-interfering destinations. Phase alignment is typically not required since they derive from the same source. However, ensure that output enable signals are coordinated to prevent transient conflicts during fault recovery scenarios.
What are the limitations of using the CDCV857DGGR in battery-powered embedded systems where low standby current is critical?
The CDCV857DGGR draws approximately 3 µA in shutdown mode when OE# is asserted low. While low compared to many alternatives, it is not negligible in ultra-low-power designs. If the application allows, disabling the PLL via the BYP pin and operating in bypass mode reduces active current to ~1.5 mA at 200MHz but sacrifices frequency flexibility. For true power savings, consider alternative devices with deeper sleep states or integrate gating logic to turn off VDD entirely during idle periods.
How does the CDCV857DGGR handle input jitter transfer function, particularly at low offset frequencies?
The input jitter transfer function of the CDCV857DGGR shows a -20 dB/decade roll-off below the PLL loop bandwidth (~100 kHz typical). This means low-frequency jitter (e.g., 1 Hz to 100 kHz) is attenuated, improving output purity. However, if the input contains significant low-jitter noise (e.g., power supply ripple), it may still couple into the output through substrate coupling or poor grounding. Proper decoupling and isolation techniques are necessary to maintain clean multiplication.
Are there any known reliability concerns related to tin whiskers or solder joint fatigue for the CDCV857DGGR in harsh industrial environments?
As a RoHS3-compliant device, the CDCV857DGGR uses lead-free finishes (typically NiPdAu or OSP), which carry a residual risk of tin whisker growth under certain humidity and stress conditions. Mitigation includes conformal coating, avoiding pure tin surfaces, and following IPC-1710 guidelines for whisker prevention. Solder joint reliability depends on CTE matching between the PCB laminate and 48-TSSOP package. Using higher-Tg FR4 or IMS substrates improves thermal cycling performance in extended temperature ranges.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments CDCV857DGGR

Product Attribute CDCV857BDGGR CDCV857BIDGGR CDCV857DGGRG4 CDCV857BDGGRG4
Part Number CDCV857BDGGR CDCV857BIDGGR CDCV857DGGRG4 CDCV857BDGGRG4
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Type - - - -
Ratio - Input:Output - - - -
Output - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
PLL - - - -
Frequency - Max - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Mounting Type - Surface Mount Through Hole Surface Mount
Differential - Input:Output - - - -
Input - - - -
Number of Circuits - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Divider/Multiplier - - - -
Voltage - Supply - - - -
Series - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C

CDCV857DGGR Datasheet PDF

Download CDCV857DGGR pdf datasheets and Texas Instruments documentation for CDCV857DGGR - Texas Instruments.

PCN Obsolescence/ EOL
Cylindrical Battery Holders.pdf
PCN Part Status Change
2.73KHz.pdf
PCN Packaging
TSSOP Carrier Tape Chg 1/Sep/2016.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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CDCV857DGGR Image

CDCV857DGGR

Texas Instruments
32D-CDCV857DGGR

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