Overview
The CDCS502PWR is a spread spectrum capable, fundamental mode crystal oscillator with selectable frequency multiplication, designed and manufactured by Texas Instruments. This device is part of a family of easy-to-use clock generator devices that offer optional spread spectrum clocking (SSC) for EMI reduction. It operates in a 3.3V environment and is characterized for operation from -40°C to 85°C, making it suitable for a wide range of consumer and industrial applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | TSSOP (PW) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage Range | -0.5 to 4.6 | V |
| Input Voltage Range | -0.5 to 4.6 | V |
| Output Voltage Range | -0.5 to 4.6 | V |
| Crystal Input Frequency Range | 8 to 32 | MHz |
| Effective Series Resistance (ESR) | Up to 180 | Ω |
| On-chip Load Capacitance | 10 | pF |
| Crystal Power Dissipation | 50 | µW |
| Output Frequency Range | 8 to 108 | MHz |
| Frequency Multiplication | x1 or x4 | - |
| Spread Spectrum Clocking (SSC) | ±0%, ±0.5%, ±1%, ±2% | - |
| Device Supply Current | 8 to 22 | mA |
Key Features
- Advanced gain-controlled fundamental mode crystal oscillator stage with built-in load capacitance of 10pF.
- Selectable frequency multiplication between x1 and x4 using an external control pin.
- Spread spectrum clocking (SSC) controllable via two external pins with options of ±0%, ±0.5%, ±1%, and ±2% center spread.
- Single 3.3V device power supply.
- Wide temperature range operation from -40°C to 85°C.
- Low space consumption in an 8-pin TSSOP package.
- LVCMOS clock output.
- Internal pull-up on spread selection and frequency multiplication selection pins.
Applications
The CDCS502PWR is suitable for various consumer and industrial applications that require a crystal oscillator with the possibility of EMI reduction through spread spectrum clocking. These applications include but are not limited to:
- Consumer electronics requiring low EMI emissions.
- Industrial control systems needing reliable clock signals.
- Communication devices that benefit from reduced electromagnetic interference.
- Automotive systems where temperature stability and low EMI are crucial.
Q & A
- What is the operating temperature range of the CDCS502PWR?
The CDCS502PWR operates from -40°C to 85°C.
- What are the available frequency multiplication options for the CDCS502PWR?
The device can multiply the input frequency by either x1 or x4.
- What is the range of spread spectrum clocking (SSC) available on the CDCS502PWR?
The SSC options are ±0%, ±0.5%, ±1%, and ±2% centered around the output clock frequency.
- What is the typical supply current for the CDCS502PWR?
The device supply current ranges from 8 to 22 mA depending on the operating conditions.
- What type of package is the CDCS502PWR offered in?
The device is offered in an 8-pin TSSOP package.
- What is the recommended crystal frequency range for the CDCS502PWR?
The recommended crystal frequency range is from 8 MHz to 32 MHz.
- How does the CDCS502PWR reduce EMI?
The device reduces EMI through spread spectrum clocking (SSC) using a triangular modulation scheme.
- What is the on-chip load capacitance of the CDCS502PWR?
The on-chip load capacitance is 10 pF.
- Can the CDCS502PWR operate without the internal PLL?
- What is the typical output duty cycle of the CDCS502PWR when the PLL is active?
The output duty cycle is between 45% and 55% when the PLL is active.
