Overview
The CDCLVD1208RHDT is a low jitter, 2-input selectable 1:8 universal-to-LVDS buffer produced by Texas Instruments. This device is designed to distribute one of two selectable clock inputs to eight pairs of differential LVDS clock outputs, ensuring minimal skew for clock distribution. It supports inputs in LVDS, LVPECL, and LVCMOS formats and is optimized for driving 50-Ω transmission lines. The CDCLVD1208RHDT operates within a 2.5-V supply environment and is characterized over an industrial temperature range of –40°C to 85°C. It is packaged in a compact 5-mm × 5-mm, 28-pin VQFN (RHD) package.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | VQFN (RHD) | - |
| Pins | 28 | - |
| Operating Temperature Range | –40 to 85 | °C |
| Clock Frequency | Up to 800 | MHz |
| Device Power Supply | 2.375 to 2.625 | V |
| Low Additive Jitter | < 300 fs RMS (10 kHz to 20 MHz) | - |
| Low Output Skew | 45 ps (Maximum) | - |
| LVDS Outputs | 8 pairs, ANSI EIA/TIA-644A Standard Compatible | - |
| LVDS Reference Voltage (VAC_REF) | 1.1 to 1.35 V | V |
| ESD Protection | Exceeds 3-kV HBM, 1-kV CDM | - |
Key Features
- 2:8 Differential Buffer
- Low Additive Jitter: < 300-fs RMS in 10-kHz to 20-MHz
- Low Output Skew of 45 ps (Maximum)
- Universal Inputs Accept LVDS, LVPECL, and LVCMOS
- Selectable Clock Inputs Through Control Pin
- 8 LVDS Outputs, ANSI EIA/TIA-644A Standard Compatible
- LVDS Reference Voltage, VAC_REF, Available for Capacitive Coupled Inputs
- Industrial Temperature Range: –40°C to 85°C
- Packaged in 5-mm × 5-mm, 28-Pin VQFN (RHD)
- ESD Protection Exceeds 3-kV HBM, 1-kV CDM
- Input Hysteresis to Prevent Random Oscillation of Outputs
Applications
- Telecommunications and Networking
- Medical Imaging
- Test and Measurement Equipment
- Wireless Communications
- General-Purpose Clocking
Q & A
- What is the primary function of the CDCLVD1208RHDT?
The CDCLVD1208RHDT is a clock buffer that distributes one of two selectable clock inputs to eight pairs of differential LVDS clock outputs.
- What types of input signals does the CDCLVD1208RHDT support?
The device supports LVDS, LVPECL, and LVCMOS input signals.
- What is the maximum clock frequency supported by the CDCLVD1208RHDT?
The device supports clock frequencies up to 800 MHz.
- What is the operating temperature range of the CDCLVD1208RHDT?
The device operates over an industrial temperature range of –40°C to 85°C.
- How many LVDS output pairs does the CDCLVD1208RHDT provide?
The device provides 8 pairs of differential LVDS clock outputs.
- What is the package type and size of the CDCLVD1208RHDT?
The device is packaged in a 5-mm × 5-mm, 28-pin VQFN (RHD) package.
- What level of ESD protection does the CDCLVD1208RHDT offer?
The device exceeds 3-kV HBM and 1-kV CDM ESD protection.
- How does the CDCLVD1208RHDT handle input signal absence?
The device incorporates input hysteresis to prevent random oscillation of the outputs in the absence of an input signal.
- What are some common applications of the CDCLVD1208RHDT?
Common applications include telecommunications and networking, medical imaging, test and measurement equipment, wireless communications, and general-purpose clocking.
- What is the power supply voltage range for the CDCLVD1208RHDT?
The device operates with a power supply voltage range of 2.375 V to 2.625 V.
