Overview
The CDCM1802RGTT is a clock buffer with programmable divider, designed by Texas Instruments. This component is specifically engineered to distribute one pair of differential clock input to one LVPECL differential clock output and one single-ended LVCMOS output. It is optimized for driving 50-Ω transmission lines and operates over a wide temperature range from -40°C to 85°C. The CDCM1802 is ideal for applications requiring precise clock signal distribution and minimal noise impact during signal transitions.
Key Specifications
| Specification | Value |
|---|---|
| Package | 16-Pin VQFN (RGT) with Exposed Pad |
| Operating Temperature Range (°C) | -40 to 85 |
| Power Supply | 3.3 V (2.5 V Functional) |
| Signaling Rate | Up to 800 MHz LVPECL, 200 MHz LVCMOS |
| Output Skew | 1.6 ns between LVCMOS and LVPECL transitions |
| Input Threshold | ±75 mV |
| Package Dimensions | 3.00 mm × 3.00 mm |
Key Features
- Distributes one differential clock input to one LVPECL differential clock output and one single-ended LVCMOS output.
- Programmable output divider for both LVPECL and LVCMOS outputs.
- 1.6-ns output skew between LVCMOS and LVPECL transitions to minimize noise.
- Differential input stage with wide common-mode range and VBB bias voltage output for single-ended input signals.
- Two control pins (S0 and S1) for selecting different output mode settings.
- An enable pin (EN) to disable or enable all outputs simultaneously.
- Provides a VBB output pin for single-ended driver applications as a common-mode voltage reference.
Applications
The CDCM1802RGTT is suitable for various applications requiring precise clock signal distribution, such as:
- High-speed data transmission systems.
- Telecommunication equipment.
- Networking devices.
- High-performance computing systems.
- Embedded systems requiring low noise and high signal integrity.
Q & A
- What is the primary function of the CDCM1802RGTT?
The CDCM1802RGTT is a clock buffer that distributes one differential clock input to one LVPECL differential clock output and one single-ended LVCMOS output.
- What is the operating temperature range of the CDCM1802RGTT?
The operating temperature range is from -40°C to 85°C.
- What is the maximum signaling rate for LVPECL and LVCMOS outputs?
The maximum signaling rate is up to 800 MHz for LVPECL and 200 MHz for LVCMOS.
- What is the output skew between LVCMOS and LVPECL transitions?
The output skew is 1.6 ns.
- How are the output modes selected on the CDCM1802RGTT?
The output modes are selected using two control pins, S0 and S1, which are 3-level inputs.
- Is there an enable pin to control the outputs?
- What is the purpose of the VBB output pin?
The VBB output pin provides a common-mode voltage reference for single-ended driver applications.
- What type of package does the CDCM1802RGTT come in?
The CDCM1802RGTT comes in a 16-pin VQFN (RGT) package with an exposed pad.
- What is the power supply requirement for the CDCM1802RGTT?
The power supply requirement is 3.3 V, with functional operation at 2.5 V.
- What is the input threshold for the receiver?
The input threshold for the receiver is ±75 mV.
