CDCE421YS

Product Overview

• Category: Integrated Circuit (IC)
• Use: Clock Generator
• Characteristics: High-performance, low-jitter clock generator
• Package: Small Outline Integrated Circuit (SOIC)
• Essence: Generates multiple clock signals with precise frequencies and low phase noise
• Packaging/Quantity: Available in tape and reel packaging, 2500 units per reel

Specifications

• Input Voltage Range: 2.375V to 3.465V
• Output Frequency Range: 8kHz to 1.5GHz
• Number of Outputs: 4
• Output Types: LVCMOS, LVDS, HCSL
• Operating Temperature Range: -40°C to +85°C
• Supply Voltage: 3.3V ±10%
• Power Dissipation: 200mW (typical)

Detailed Pin Configuration

The CDCE421YS has a total of 20 pins arranged as follows:

1. VDDA: Power supply voltage for analog circuitry
2. GND: Ground reference
3. XIN: Crystal oscillator input
4. XOUT: Crystal oscillator output
5. SEL0: Output frequency selection bit 0
6. SEL1: Output frequency selection bit 1
7. SDA: Serial data input/output for I2C communication
8. SCL: Serial clock input for I2C communication
9. OE: Output enable control
10. VDDD: Power supply voltage for digital circuitry
11. OUT0: Output 0
12. OUT1: Output 1
13. OUT2: Output 2
14. OUT3: Output 3
15. VDDO: Power supply voltage for outputs
16. GND: Ground reference
17. GND: Ground reference
18. GND: Ground reference
19. GND: Ground reference
20. VDDO: Power supply voltage for outputs

Functional Features

• Generates up to four clock signals with precise frequencies and low phase noise
• Supports various output types including LVCMOS, LVDS, and HCSL
• Flexible output frequency selection through SEL0 and SEL1 pins
• I2C interface for easy configuration and control
• Output enable control for individual output signal activation
• Low power consumption and high-performance operation
• Wide operating temperature range for versatile applications

Advantages and Disadvantages

Advantages

• High-performance clock generation with low jitter
• Multiple output options for compatibility with different systems
• Easy configuration and control through the I2C interface
• Precise frequency selection for optimal system synchronization
• Compact SOIC package for space-constrained designs

Disadvantages

• Limited number of output channels (4)
• Requires an external crystal oscillator for accurate frequency generation
• Relatively higher power dissipation compared to some alternative models

Working Principles

The CDCE421YS utilizes a combination of internal PLL (Phase-Locked Loop) and frequency dividers to generate multiple clock signals. The input clock is provided through the XIN pin, which can be sourced from an external crystal oscillator. The PLL locks onto the input frequency and generates a high-frequency clock internally. This high-frequency clock is then divided down to the desired output frequencies based on the configuration set through the SEL0 and SEL1 pins. The resulting clock signals are available at the OUT0 to OUT3 pins.

Detailed Application Field Plans

The CDCE421YS finds applications in various fields where precise clock generation is crucial. Some of the key application areas include:

1. Telecommunications: Clock synchronization in network equipment, routers, and switches.
2. Data Centers: Timing synchronization for servers, storage systems, and network infrastructure.
3. Industrial Automation: Control systems, PLCs (Programmable Logic Controllers), and robotics.
4. Test and Measurement: High-precision timing for oscilloscopes, signal generators, and data acquisition systems.
5. Consumer Electronics: Audio/video equipment, gaming consoles, and digital televisions.

Detailed and Complete Alternative Models

1. CDCE913: Clock generator with 8 output channels and lower power dissipation.
2. CDCE925: Clock generator with integrated voltage-controlled oscillator (VCO) for wider frequency range.
3. CDCE937: Clock generator with enhanced phase noise performance for sensitive applications.
4. CDCE941: Clock generator with additional I2C programmable features and extended temperature range.

These alternative models offer different features and specifications to cater to specific application requirements.

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