Overview
The CDCE937-Q1 is a programmable 3-PLL VCXO clock synthesizer produced by Texas Instruments. This device is designed for automotive applications and is AEC-Q100 qualified, ensuring it meets stringent automotive standards. It operates over a wide temperature range of –40°C to 125°C and is packaged in a 20-pin TSSOP (PW) package.
The CDCE937-Q1 provides flexible and programmable options for output clocks, input signals, and control pins, allowing users to configure the device according to their specific needs. It generates up to seven output clocks from a single input frequency, enabling both board space and cost savings.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 20-TSSOP (PW) |
| Pins | 20 |
| Operating Temperature Range | –40°C to 125°C |
| Input Clock Frequency | 8 MHz to 32 MHz (external crystal) |
| Output Clock Frequency | Up to 230 MHz |
| Output Type | Single-Ended LVCMOS |
| Supply Voltage | 2.5 V or 3.3 V (CDCE937-Q1), 1.8 V (CDCEL937-Q1) |
| PLL | Yes, with bypass |
| VCXO Pull Range | ±150 ppm |
| Period Jitter | Typical 60 ps |
| ESD Classification | HBM Level 2, CDM Level C4B |
Key Features
- Qualified for Automotive Applications and AEC-Q100 certified.
- In-system programmability and nonvolatile EEPROM to store customer settings.
- Flexible input clocking concept with external crystal or LVCMOS clock signal.
- On-chip VCXO with ±150 ppm pull range.
- Low-noise PLL core with integrated PLL loop filter components.
- Supports spread-spectrum clocking (SSC) with programmable down and center spread.
- Three user-definable control inputs for frequency selection, SSC parameters, PLL bypass, power down, and output-disable function.
- Separate output supply pins (VDDOUT) for 2.5 V or 3.3 V (CDCE937-Q1) and 1.8 V (CDCEL937-Q1).
- Generates highly accurate clocks for various applications including video, audio, USB, IEEE1394, RFID, Bluetooth™, WLAN, Ethernet™, and GPS.
- Development and programming kit available (TI Pro-Clock™) for easy PLL design and programming.
Applications
- Clusters
- Head Units
- Navigation Systems
- Advanced Driver Assistance Systems (ADAS)
- Infotainment and camera systems in automotive applications.
Q & A
- What is the operating temperature range of the CDCE937-Q1?
The operating temperature range is –40°C to 125°C.
- What types of input clocks can the CDCE937-Q1 accept?
The device can accept an external crystal (8 MHz to 32 MHz) or an LVCMOS clock signal.
- What is the maximum output clock frequency of the CDCE937-Q1?
The maximum output clock frequency is up to 230 MHz.
- Does the CDCE937-Q1 support spread-spectrum clocking (SSC)?
Yes, it supports SSC with programmable down and center spread.
- What is the purpose of the three user-definable control inputs on the CDCE937-Q1?
These inputs can be used for frequency selection, SSC parameters, PLL bypass, power down, and output-disable function.
- What is the supply voltage range for the CDCE937-Q1?
The supply voltage range is 2.5 V or 3.3 V for CDCE937-Q1 and 1.8 V for CDCEL937-Q1.
- Is the CDCE937-Q1 AEC-Q100 qualified?
Yes, it is AEC-Q100 qualified.
- What type of package is the CDCE937-Q1 available in?
The device is packaged in a 20-pin TSSOP (PW) package.
- Can the CDCE937-Q1 be programmed in-system?
Yes, it supports in-system programmability and nonvolatile EEPROM to store customer settings.
- What is the typical period jitter of the CDCE937-Q1?
The typical period jitter is 60 ps.
