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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Clock Buffers, Drivers

Texas Instruments CDCV304PWG4

Name: CDCV304PWG4
Brand: Texas Instruments
SKU: CDCV304PWG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CDCV304PWG4

Manufacturer:: Texas Instruments

Category:: Clock Buffers, Drivers

Package:: 8-TSSOP (0.173", 4.40mm Width)

Datasheet:: CDCV304PWG4.pdf

Description:: IC CLK BUFFER 1:4 200MHZ 8TSSOP

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Product details

Overview

CDCV304PWG4 from Texas Instruments is a 200-MHz, 1:4 general-purpose clock buffer with PCI-X compliance, low output skew (<100 ps), and dual-supply operation (2.5 V or 3.3 V). It distributes a single CLKIN signal to four buffered outputs (1Y0–1Y3) and features active-low output enable (OE) that drives outputs low when disabled. It is used in PCI-X bus timing distribution for server and workstation motherboard designs.

For engineers reviewing the CDCV304PWG4 datasheet, CDCV304PWG4 pinout, CDCV304PWG4 application, or CDCV304PWG4 equivalent, key selection criteria include output skew tolerance, PCI-X 1.0 timing compliance, supply voltage flexibility, thermal performance at 85°C ambient, and TSSOP-8 package compatibility with high-density PCB layouts.

Technical Context

The CDCV304PWG4 implements a single-input, quad-output fanout architecture with synchronous edge-aligned buffering and no internal PLL or frequency synthesis. All outputs replicate CLKIN phase with minimal additive jitter (56 fs rms at 125 MHz) and tightly controlled pulse skew (≤150 ps).

Its functional modes are strictly determined by OE logic level: when OE is high, all outputs mirror CLKIN; when OE is low, all outputs drive low regardless of CLKIN state. The device supports equal-load output skew specification (tsk(o) ≤100 ps at 3.3 V) and meets PCI-X 1.0 clock waveform requirements including t_high/t_low minimums and slew rate limits (1.5–2.7 V/ns).

Key Specifications

Parameter	Value and Actual Design Meaning
Max Clock Frequency	200 MHz - supports full-speed PCI-X 133 MHz bus timing with margin for signal integrity degradation.
Output Skew (tsk(o))	≤100 ps at VDD = 3.3 V - ensures simultaneous clock arrival across four loads for synchronous bus interfaces.
Supply Voltage Range	2.3 V to 3.6 V - enables direct use in both 2.5-V and 3.3-V PCI-X domains without level-shifting.
Operating Temperature	–40°C to +85°C - qualified for industrial and automotive under-hood control module timing applications.
Additive Phase Jitter	56 fs rms (12 kHz–20 MHz, fout = 125 MHz) - preserves low-jitter timing integrity for high-speed serial links downstream.
Propagation Delay	1.8–3.0 ns (tPLH/tPHL at 3.3 V) - enables precise setup/hold timing budget allocation in multi-clock-domain systems.
Output Drive Strength	IOL = 24 mA / IOH = –24 mA at 3.3 V - sufficient to drive four 50-Ω parallel-terminated lines or standard CMOS loads.

Pinout & Package

Package: 8-pin TSSOP (PW), body size 3.00 mm × 4.40 mm, 1.2 mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1 - CLKIN	Input	Single-ended reference clock input; accepts LVCMOS-compatible signals up to 200 MHz.
2 - OE	Input	Active-low output enable; asserts low on all Y outputs when deasserted (OE = low).
3 - 1Y0	Output	Buffered clock output #0; electrically identical to 1Y1–1Y3 with matched delay and skew.
4 - GND	Power	Digital ground reference; must be connected to low-impedance system ground plane.
5 - 1Y1	Output	Buffered clock output #1; shares same timing characteristics and loading capability as 1Y0.
6 - VDD	Power	Single supply rail (2.5 V or 3.3 V); requires local 0.1-µF ceramic decoupling adjacent to pin.
7 - 1Y2	Output	Buffered clock output #2; maintains <100-ps inter-output skew under matched load conditions.
8 - 1Y3	Output	Buffered clock output #3; final output in 1:4 fanout bank; supports same rise/fall slew rates (1.5–2.7 V/ns).

Key Features

Feature	Design Value
PCI-X 1.0 Compliance	Meets all timing, waveform, and skew requirements for PCI-X 133 MHz bus clock distribution without external tuning.
Low-Noise Fanout	56 fs rms additive jitter at 125 MHz ensures minimal timing degradation when distributing clocks to multiple receivers.
Output Enable Control	OE-driven low-state output forcing eliminates floating clocks during power sequencing or hot-plug events.
Dual-Voltage Operation	Validated at both 2.5 V and 3.3 V supplies - eliminates need for separate voltage translators in mixed-voltage systems.
Industrial Temp Range	–40°C to +85°C operation supports deployment in base station backplanes, industrial controllers, and embedded servers.

Applications

PCI-X Server Backplane	Industrial Embedded Controller
Use Scenario: Distributing a 133-MHz system clock across four PCI-X slots on a server motherboard with tight skew constraints. IC Role / Device Role / Timing Role: Primary clock fanout buffer ensuring simultaneous clock delivery to all slot connectors per PCI-X 1.0 spec. Use Value: Output skew ≤100 ps guarantees setup/hold timing margins are maintained across all four slots under worst-case trace length mismatch.	Use Scenario: Providing synchronized clocking to FPGA, microcontroller, and peripheral ASIC on an industrial PLC mainboard. IC Role / Device Role / Timing Role: Centralized clock repeater enabling deterministic timing between heterogeneous logic domains. Use Value: Dual-supply support (2.5 V/3.3 V) allows direct interface with mixed-voltage ICs without level shifters or additional regulators.
Automotive ADAS Domain Controller	Test Equipment Timing Subsystem
Use Scenario: Delivering a stable 100-MHz reference to multiple ADCs and FPGAs in an automotive radar processing unit. IC Role / Device Role / Timing Role: Low-jitter clock distributor preserving time-of-flight measurement accuracy in high-speed sampling paths. Use Value: 56 fs rms additive jitter prevents timing-induced SNR degradation in 12-bit+ ADC front-ends operating above 50 MSPS.	Use Scenario: Generating four phase-aligned clock outputs for synchronized stimulus/response channels in automated test equipment. IC Role / Device Role / Timing Role: Precision fanout buffer enabling channel-to-channel skew <150 ps for multi-channel digital pattern generation. Use Value: Pulse skew ≤150 ps ensures sub-nanosecond alignment across independent test channels, critical for parametric yield analysis.

PCI-X Server Backplane

Industrial Embedded Controller

Use Scenario: Distributing a 133-MHz system clock across four PCI-X slots on a server motherboard with tight skew constraints.

IC Role / Device Role / Timing Role: Primary clock fanout buffer ensuring simultaneous clock delivery to all slot connectors per PCI-X 1.0 spec.

Use Value: Output skew ≤100 ps guarantees setup/hold timing margins are maintained across all four slots under worst-case trace length mismatch.

Use Scenario: Providing synchronized clocking to FPGA, microcontroller, and peripheral ASIC on an industrial PLC mainboard.

IC Role / Device Role / Timing Role: Centralized clock repeater enabling deterministic timing between heterogeneous logic domains.

Use Value: Dual-supply support (2.5 V/3.3 V) allows direct interface with mixed-voltage ICs without level shifters or additional regulators.

Automotive ADAS Domain Controller

Test Equipment Timing Subsystem

Use Scenario: Delivering a stable 100-MHz reference to multiple ADCs and FPGAs in an automotive radar processing unit.

IC Role / Device Role / Timing Role: Low-jitter clock distributor preserving time-of-flight measurement accuracy in high-speed sampling paths.

Use Value: 56 fs rms additive jitter prevents timing-induced SNR degradation in 12-bit+ ADC front-ends operating above 50 MSPS.

Use Scenario: Generating four phase-aligned clock outputs for synchronized stimulus/response channels in automated test equipment.

IC Role / Device Role / Timing Role: Precision fanout buffer enabling channel-to-channel skew <150 ps for multi-channel digital pattern generation.

Use Value: Pulse skew ≤150 ps ensures sub-nanosecond alignment across independent test channels, critical for parametric yield analysis.

Equivalent & Alternatives

The following parts are listed as comparable options for similar clock buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CDCLVC1107PWR	LVCMOS/LVTTL 1:10 fanout, 250 MHz max, no OE control, 3.3-V only, higher ICC (45 mA)	Supports larger fanout count but lacks output disable and dual-voltage operation	Choose when >4 outputs needed and OE control is unnecessary; not suitable for PCI-X 1.0 compliance verification.
PI6C20400LEX	PCI-X 1:4 buffer with integrated 25-Ω series termination, 200 MHz, 3.3-V only, no 2.5-V support	Reduces external termination components but sacrifices supply flexibility	Prefer when board space is constrained and 3.3-V-only design simplifies power architecture; verify layout matches termination requirements.

Compared with CDCLVC1107PWR and PI6C20400LEX, the CDCV304PWG4 uniquely balances PCI-X 1.0 compliance, dual-supply operation, and active-low OE control in an industry-standard TSSOP-8 package-making it optimal for legacy PCI-X upgrades and mixed-voltage industrial timing systems where layout reuse and thermal robustness are critical.

Availability

CDCV304PWG4 is available at Aetrix Electronics and suitable for PCI-X server backplanes, industrial embedded controllers, and automotive ADAS domain controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CDCV304PWG4 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

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The CDCV304PWG4 belongs to TI's clock buffer product line, designed specifically for high-fidelity, low-skew clock distribution in PCI-X and industrial timing-critical systems where signal integrity and thermal reliability are paramount.

FAQ

What is the maximum operating frequency supported by the CDCV304PWG4?

The CDCV304PWG4 supports a maximum clock frequency of 200 MHz across its full operating temperature range (–40°C to +85°C) and supply voltage range (2.3 V to 3.6 V). This rating is validated per TI's SCAS643I datasheet, with timing specifications guaranteed up to 200 MHz under recommended conditions, making it suitable for PCI-X 133 MHz applications with margin.

Does the CDCV304PWG4 require external termination resistors?

No, the CDCV304PWG4 does not require external series or parallel termination resistors. Its outputs are designed to drive standard CMOS loads directly, with specified drive strength (±24 mA at 3.3 V) and slew rates (1.5–2.7 V/ns) compliant with PCI-X 1.0 waveform requirements. External termination may be added only if board-level impedance matching or EMI reduction is needed.

Is the CDCV304PWG4 pin-compatible with other TI clock buffers like the CDCV305?

No, the CDCV304PWG4 is not pin-compatible with the CDCV305. While both are TSSOP-8 clock buffers, the CDCV305 has different pin assignments-including dual clock inputs and separate output banks-and lacks the OE control pin present on the CDCV304PWG4. Pin mapping must be verified against each device's respective datasheet; direct replacement is not supported.

What is the function of the OE pin on the CDCV304PWG4?

The OE (Output Enable) pin on the CDCV304PWG4 is an active-low control input. When OE is high, all four outputs (1Y0–1Y3) actively buffer the CLKIN signal. When OE is low, all outputs are driven low-regardless of CLKIN state-providing deterministic clock gating for power management or system reset sequences without floating outputs.

Can the CDCV304PWG4 operate reliably at 85°C ambient temperature?

Yes, the CDCV304PWG4 is fully characterized and guaranteed to operate reliably at +85°C ambient temperature. TI specifies its recommended operating conditions from –40°C to +85°C, with thermal metrics (θJA = 149°C/W, θJB = 102°C/W) confirming safe junction temperatures under typical PCB layouts and airflow conditions, making it suitable for enclosed industrial and automotive environments.

CDCV304PWG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 8-TSSOP (0.173", 4.40mm Width)

Packaging:: Tube

Product Status:: Discontinued at Digi-Key

Type:: Fanout Buffer (Distribution)

Number of Circuits:: 1

Ratio - Input:Output:: 1:4

Differential - Input:Output:: No/No

Input:: LVTTL

Output:: LVTTL

Frequency - Max:: 200 MHz

Voltage - Supply:: 2.3V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 8-TSSOP

CDCV304PWG4 FAQ

1.How can I place an order for CDCV304PWG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for CDCV304PWG4 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 CDCV304PWG4 reliable?

The price and inventory of CDCV304PWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CDCV304PWG4 is usually 5 days.

3.What payment methods are accepted for CDCV304PWG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CDCV304PWG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CDCV304PWG4?

CDCV304PWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CDCV304PWG4 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 CDCV304PWG4?

For technical support, including CDCV304PWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CDCV304PWG4 requirements.

6.How does Aetrix verify that CDCV304PWG4 is sourced from the original manufacturer or authorized distributors?

All CDCV304PWG4 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 CDCV304PWG4 meets industry standards.

7.What is the process for return or replacement of CDCV304PWG4?

All CDCV304PWG4 units undergo pre-shipment inspection (PSI). If there is an issue with CDCV304PWG4, 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 CDCV304PWG4 part is unused and in its original packaging.

Return procedure for CDCV304PWG4:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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