Overview
The CDCE6214RGET from Texas Instruments is an ultra-low power, four-channel clock generator featuring a high-performance, low-power frac-N PLL. This device is designed to generate five independent clock outputs with various driver modes, including differential and LVCMOS outputs. It supports input sources such as single-ended or differential clock signals, or a crystal. The CDCE6214RGET is configurable via an I2C interface or through GPIO pins in Pin Mode, making it versatile for different system configurations. With integrated EEPROM, the device allows for factory- and user-programmable settings, ensuring easy and instant-on operation with low power consumption.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | VQFN (RGE) | - |
| Pins | 24 | - |
| Operating Temperature Range | -40 to 105 | °C |
| Power Supply Voltage | 1.8 V, 2.5 V, 3.3 V ±5% | V |
| Typical Power Consumption (4-output channel) | 65 mA | mA |
| Typical Power Consumption (1-output channel) | 23 mA | mA |
| RMS Jitter (Integer Mode, Differential Output) | 350 fs (typ), 600 fs (max) | fs |
| RMS Jitter (Integer Mode, LVCMOS Output) | 1.05 ps (typ), 1.5 ps (max) | ps |
| RMS Jitter (Fractional Mode, Differential Output) | 1.7 ps (typ), 2.1 ps (max) | ps |
| RMS Jitter (Fractional Mode, LVCMOS Output) | 2.0 ps (typ), 4.0 ps (max) | ps |
| Output Frequency Range | 24 kHz to 328.125 MHz | Hz |
| I2C Interface Speed | Up to 400 kHz | kHz |
Key Features
- Configurable high-performance, low-power frac-N PLL with RMS jitter performance.
- Supports PCIe Gen1/2/3/4 with SSC and Gen 1/2/3/4/5 without SSC.
- Internal VCO range: 2.335 GHz to 2.625 GHz.
- Universal clock input: differential AC-coupled or LVCMOS (10 MHz to 200 MHz), crystal (10 MHz to 50 MHz).
- Flexible output clock distribution: 4 channel dividers for up to 5 unique output frequencies.
- Output modes: LVDS-like, LP-HCSL, or LVCMOS on OUT0 – OUT4 pins.
- Glitchless output divider switching and output channel synchronization.
- Individual output enable through GPIO and register.
- Frequency margining options with glitch-free operation.
- DCO mode: frequency increment/decrement with 10 ppb or less step-size.
- Configurable GPIOs and flexible configuration options.
- Integrated EEPROM with two pages and external select pin for in-situ programming.
- Single or mixed supply for level translation: 1.8 V, 2.5 V, 3.3 V.
- Low electromagnetic emissions and small footprint: 24-pin VQFN (4 mm × 4 mm).
Applications
- PCIe Gen 1 - Gen 5 clocking.
- Data Center & Enterprise Computing, PC & Notebook.
- Enterprise Machine - Multi-Function Printer.
- Test & Measurement, Handheld Equipment.
Q & A
- What is the CDCE6214RGET's primary function?
The CDCE6214RGET is a four-channel, ultra-low power clock generator that can generate five independent clock outputs from a single reference input.
- What types of output modes does the CDCE6214RGET support?
The device supports LVDS-like, LP-HCSL, and LVCMOS output modes on its output pins.
- What is the typical power consumption of the CDCE6214RGET?
The typical power consumption is 65 mA for a 4-output channel configuration and 23 mA for a 1-output channel configuration.
- What is the RMS jitter performance of the CDCE6214RGET in integer mode?
In integer mode, the RMS jitter is 350 fs typical and 600 fs maximum for differential outputs, and 1.05 ps typical and 1.5 ps maximum for LVCMOS outputs.
- How can the CDCE6214RGET be configured?
The device can be configured through an I2C interface or via GPIO pins in Pin Mode.
- What is the operating temperature range of the CDCE6214RGET?
The operating temperature range is -40°C to 105°C.
- Does the CDCE6214RGET support PCIe clocking?
Yes, it supports PCIe Gen1/2/3/4 with SSC and Gen 1/2/3/4/5 without SSC.
- What is the frequency range of the output clocks?
The output frequency range is from 24 kHz to 328.125 MHz.
- Does the CDCE6214RGET have integrated EEPROM?
Yes, it has integrated EEPROM with two pages and an external select pin for in-situ programming.
- What are the power supply voltage options for the CDCE6214RGET?
The device can operate from 1.8 V, 2.5 V, or 3.3 V ±5% power supplies.
