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Texas Instruments CDCVF2505IDRCT
- Part No.:
- CDCVF2505IDRCT
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CDCVF2505IDRCT.pdf
- Description:
- IC PLL CLOCK DRIVER 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,284
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Product details
Overview
CDCVF2505IDRCT from Texas Instruments is a 3.3-V phase-lock loop (PLL) clock driver IC designed for synchronous DRAM clock distribution, delivering five low-skew, low-jitter outputs (1Y0–1Y3 and CLKOUT) with integrated 25-Ω series damping resistors, operating from 24 MHz to 200 MHz, and featuring automatic power-down below ~10 MHz input frequency.
For engineers reviewing the CDCVF2505IDRCT datasheet, CDCVF2505IDRCT pinout, CDCVF2505IDRCT application, or CDCVF2505IDRCT equivalent, key selection criteria include zero-delay PLL alignment, on-chip RC loop filter, 3-State output behavior during loss of clock, thermal performance in TSSOP-8 package, and compatibility with spread-spectrum clocking in memory subsystems.
Technical Context
The CDCVF2505IDRCT implements a fully integrated PLL architecture with internal feedback via CLKOUT to achieve precise phase alignment between CLKIN and all Y outputs. Its loop filter is monolithic, eliminating external components, and it uses edge-detection logic to auto-enable/disable the PLL based on input frequency presence.
It operates exclusively in active or power-down functional modes-no user configuration required-with stabilization time of 100 µs after valid CLKIN application. Output duty cycles are actively adjusted to 50% regardless of input duty cycle, and all outputs feature integrated 25-Ω series termination for point-to-point load driving.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency | 24 MHz to 200 MHz - supports full SDRAM clocking range without external frequency translation |
| Cycle-to-Cycle Jitter | <150 ps over 66–200 MHz - ensures timing margin integrity in high-speed memory interfaces |
| Output Skew (Yn to Yn) | 150 ps max - enables simultaneous clocking of multiple SDRAM banks with minimal timing skew |
| Propagation Delay | ±150 ps normalized - tunable via CLKOUT capacitive loading to achieve zero delay or controlled phase offset |
| Supply Voltage | 3.0 V to 3.6 V - compatible with standard 3.3-V memory subsystem rails |
| Power-Down Current | <100 mA typical - reduces system standby power when CLKIN is absent or below ~10 MHz |
| Operating Temperature | –40°C to +85°C - qualified for industrial and server-grade embedded applications |
Pinout & Package
The CDCVF2505IDRCT is packaged in an 8-pin TSSOP (PW) with body dimensions 4.40 mm × 3.00 mm and moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CLKIN | Input | Reference clock input to PLL phase comparator; requires fixed-frequency/fixed-phase signal for lock acquisition |
| 2 - 1Y1 | Output | Low-skew buffered copy of CLKIN with integrated 25-Ω series resistor; tri-stated during power-down |
| 3 - 1Y0 | Output | Primary clock output with same electrical characteristics as 1Y1; used for main SDRAM bank clocking |
| 4 - GND | Power | Analog/digital ground reference plane connection; critical for jitter performance and EMI control |
| 5 - 1Y2 | Output | Third buffered output; identical timing and drive strength to other Y outputs |
| 6 - VDD 3.3V | Power | Single 3.3-V supply rail; requires local 100-nF decoupling per TI layout guidelines |
| 7 - 1Y3 | Output | Fourth buffered output; supports multi-bank SDRAM or peripheral clock fanout |
| 8 - CLKOUT | Output | Internal PLL feedback path output; not for external routing-used only for capacitive delay tuning to adjust propagation phase |
Key Features
| Feature | Design Value |
|---|---|
| Integrated RC PLL Loop Filter | Eliminates need for external capacitors/resistors-reduces BOM count, PCB area, and tuning complexity |
| On-Chip 25-Ω Series Damping Resistors | Enables direct point-to-point clock trace driving without external series termination-improves signal integrity at 200 MHz |
| Automatic Power-Down Detection | Edge detector disables PLL and tri-states all outputs when CLKIN falls below ~10 MHz-cuts quiescent current without external control |
| Duty Cycle Correction | Outputs maintain 45–55% duty cycle across full 24–200 MHz range-ensures balanced setup/hold margins for DDR interfaces |
| Spread-Spectrum Clock Compatibility | PLL bandwidth accommodates modulated reference inputs-supports EMI reduction techniques in host systems |
Applications
| Synchronous DRAM Memory Subsystem | Industrial Control Backplane Clocking |
|---|---|
Use Scenario: Distributing a single reference clock to four SDRAM banks and one memory controller feedback path in a server motherboard. IC Role / Device Role / Timing Role: Zero-delay PLL clock driver providing phase-aligned, low-jitter copies of CLKIN with integrated termination and auto-power-down. Use Value: Eliminates external loop filter components and reduces inter-bank skew to ≤150 ps-enabling stable 200-MHz DDR operation. | Use Scenario: Providing synchronized clocks to multiple FPGA I/O banks and ADC/DAC peripherals in an industrial PLC rack. IC Role / Device Role / Timing Role: High-reliability clock buffer with wide temperature range (–40°C to +85°C) and robust ESD protection (±2000 V HBM). Use Value: Maintains 50% output duty cycle across frequency and temperature-preserving timing margins in deterministic real-time control loops. |
| General-Purpose Zero-Delay Clock Buffer | Embedded System Reference Clock Distribution |
Use Scenario: Replacing discrete crystal oscillator + buffer combinations in space-constrained consumer electronics designs. IC Role / Device Role / Timing Role: Single-chip PLL-based clock generator with integrated damping and no external passive components required. Use Value: Reduces total solution size by >40% versus discrete alternatives while achieving <150-ps jitter-critical for compact high-density PCBs. | Use Scenario: Driving clocks to ARM Cortex-A/M cores, DDR PHYs, and PCIe SerDes in automotive infotainment head units. IC Role / Device Role / Timing Role: Low-power, spread-spectrum-compatible clock distributor supporting dynamic frequency scaling and thermal management. Use Value: Auto-tri-state behavior prevents floating clocks during processor sleep states-reducing system-level EMI and power leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PLL clock driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CDCVF2505D | SOIC-8 package (4.90 mm × 3.90 mm); higher RθJA (112.3°C/W) vs. TSSOP-8 (175.8°C/W) | Better suited for through-hole prototyping or legacy board layouts requiring SOIC footprint | Select CDCVF2505D when board space allows larger package and thermal design prioritizes lower junction-to-ambient resistance |
| CDCVF2505-Q1 | Automotive AEC-Q100 qualified; extended temperature range (–40°C to +125°C); different qualification test flow | Required for safety-critical ADAS or infotainment modules where automotive reliability standards apply | Select CDCVF2505-Q1 only when AEC-Q100 compliance and 125°C operation are mandatory-not a drop-in replacement for CDCVF2505IDRCT |
Compared with CDCVF2505D and CDCVF2505-Q1, the CDCVF2505IDRCT offers optimized thermal performance in compact TSSOP-8 packaging for high-density server and industrial PCBs, while retaining identical electrical functionality and pinout-but lacks automotive qualification and has higher thermal resistance than the SOIC variant.
Availability
CDCVF2505IDRCT is available at Aetrix Electronics and suitable for synchronous DRAM memory subsystems, industrial backplane clocking, and general-purpose zero-delay clock buffering requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for CDCVF2505IDRCT 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 specializing in analog, embedded processing, and digital signal processing technologies, with leadership in precision timing, power management, and interface solutions.
The CDCVF2505 product line was developed specifically for high-performance, low-skew clock distribution in synchronous memory systems-emphasizing zero-delay PLL alignment, integrated termination, and spread-spectrum compatibility for EMI-sensitive server and industrial applications.
FAQ
What is the function of the CLKOUT pin on the CDCVF2505IDRCT?
The CLKOUT pin on the CDCVF2505IDRCT provides the internal PLL feedback signal and must not be routed externally as a clock output. It is used solely for capacitive delay tuning-adding a discrete capacitor between CLKOUT and GND adjusts the feedback path delay to achieve zero delay, leading, or lagging phase relationships between CLKIN and the 1Y outputs. This pin is not intended to drive any external load beyond the tuning capacitor.
Does the CDCVF2505IDRCT require external loop filter components?
No, the CDCVF2505IDRCT does not require external loop filter components. It integrates a complete RC-based PLL loop filter on-die, which eliminates the need for external resistors or capacitors typically associated with PLL clock drivers. This integration reduces bill-of-materials cost, PCB area, and design complexity while ensuring consistent loop response across manufacturing lots and temperature ranges.
What happens to the outputs of the CDCVF2505IDRCT when the input clock is removed?
When the input clock (CLKIN) is removed or drops below ~10 MHz, the CDCVF2505IDRCT's internal edge detector triggers automatic power-down mode: the PLL is disabled, and all five outputs (1Y0–1Y3 and CLKOUT) enter high-impedance (3-State) condition. This prevents floating clock signals, reduces system-level EMI, and lowers quiescent current to less than 100 mA typical-enabling seamless integration into power-managed architectures.
Can the CDCVF2505IDRCT drive unterminated transmission lines?
No, the CDCVF2505IDRCT is not designed to drive unterminated transmission lines. Each output (1Y0–1Y3) includes an integrated 25-Ω series damping resistor optimized for point-to-point connections to properly terminated loads (e.g., 50-Ω traces with 50-Ω receiver termination). Driving unterminated lines would cause signal reflections, degraded edge fidelity, and increased jitter-violating the device's specified switching characteristics and nullifying its low-skew advantage.
Is the CDCVF2505IDRCT pin-compatible with other members of the CDCVF2505 family?
Yes, the CDCVF2505IDRCT is pin-compatible with all other CDCVF2505 variants-including CDCVF2505D (SOIC-8), CDCVF2505DR (SOIC-8 tape-and-reel), and CDCVF2505PW (TSSOP-8)-as they share identical 8-pin pinout, signal assignment, and electrical interface. The only differences are package type, thermal characteristics, and ordering format; no PCB layout changes are required when substituting among these variants.
CDCVF2505IDRCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- PLL Clock Driver
- PLL:
- Yes with Bypass
- Input:
- Clock
- Output:
- Clock
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:8
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 200MHz
- Divider/Multiplier:
- No/No
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
CDCVF2505IDRCT FAQ
1.How can I place an order for CDCVF2505IDRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CDCVF2505IDRCT 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 CDCVF2505IDRCT reliable?
The price and inventory of CDCVF2505IDRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CDCVF2505IDRCT is usually 5 days.
3.What payment methods are accepted for CDCVF2505IDRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CDCVF2505IDRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CDCVF2505IDRCT?
CDCVF2505IDRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CDCVF2505IDRCT 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 CDCVF2505IDRCT?
For technical support, including CDCVF2505IDRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CDCVF2505IDRCT requirements.
6.How does Aetrix verify that CDCVF2505IDRCT is sourced from the original manufacturer or authorized distributors?
All CDCVF2505IDRCT 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 CDCVF2505IDRCT meets industry standards.
7.What is the process for return or replacement of CDCVF2505IDRCT?
All CDCVF2505IDRCT units undergo pre-shipment inspection (PSI). If there is an issue with CDCVF2505IDRCT, 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 CDCVF2505IDRCT part is unused and in its original packaging.
Return procedure for CDCVF2505IDRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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