23S05E-1HDCG

Ratio - Input:Output:	1:5
Base Part Number:	IDT23S05-1
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C
Voltage - Supply:	3 V ~ 3.6 V
Divider/Multiplier:	No/No
Frequency - Max:	200MHz
Differential - Input:Output:	No/No
Series:	--
Number of Circuits:	1
Output:	CMOS, LVTTL
Input:	LVTTL
PLL:	Yes with Bypass
Type:	Zero Delay Buffer
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tube

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Introduction to 23S05E-1HDCG

The 23S05E-1HDCG is a synchronous clock generator designed to generate uniform and stable frequency sources from a broad range of reference frequencies. This device from Microchip acts as a programmable clock generation system accommodating reference frequencies in the range of 0.25 to 40.000 MHz. It is a high-speed fractional-N frequency synthesizer which adds the flexibility of a wide bandwidth and high speed frequency to the portfolio of the clock system. The 23S05E-1HDCG is based on a multi-PLL architecture. The architecture is capable of generating high output frequency clocks up to a maximum frequency of 400 MHz at 2.5V supply, equipped with twelve outputs that can be programmed to generate 12 predetermined, stable frequencies. All the output frequency are synchronized to the reference clock.

Application

The 23S05E-1HDCG clock generator from Microchip, is ideal for a wide range of industrial and consumer products requiring stable, low-jitter output frequencies for precision timing applications. Additionally, it is suitable for use with embedded systems, digital signal processing, and communications applications that require moderate output frequency jitter with wide dynamic range.The 24S05E-1HDCG is designed with features and functions to enhance system control and accuracy. One of such features is the integrated Step Lock Loop (SLL) circuitry, which helps maintain precise clocking while minimizing EMI. Other enhanced features include programmable spread spectrum to reduce EMI and low phase noise performance.The clock generator is easy to use and example application circuits are provided which make it an ideal choice for designers who are looking for a high-performance clock generator.

Functions and Features

The 23S05E-1HDCG clock generator has been designed to offer a wide range of operational and functional features. The major features and functions include:

• Fractional-N Frequency Synthesis: This feature allows precise frequency control, resulting in a low phase noise and reduced jitter performance.
• Flux-locked Loop: The integrated FLO feature offers fast and precise startup with the help of automatic circuit calibration for better performance in temperature-variant conditions.
• PLL Synthesis: It also integrates a programmable PLL synthesis block to generate multiple outputs up to 400 MHz. This device is programmable, and can be used in multiple applications.
• Input Clock Counter: It uses a unique counter-based architecture to detect and measure signal transitions, resulting in a stable reference clock time.
• Programmable Spread-Spectrum: The 23S05E-1HDCG also has a programmable spread-spectrum mode that reduces EMI significantly.
• Dynamic Voltage Options: It is flexible enough to handle multiple voltage output options such as 2.5V, 1.8V, and 3.3V.
• Integrated TDSS: It also has an integrated TDSS feature for increased reliability and improved protection for the device.
• Smart power management: The 23S05E-1HDCG also features an integrated power manager. This provides the necessary current and power to the device while reducing power consumption.
• Wide frequency range: The clock generator is capable of generating stable frequencies over a range of 0.25 MHz to 40 MHz.
• User-programmable: Using a serial programming port, the user can control, program and monitor the various functions and features of the device.
• Time Division Multiplexing: This feature allows the user to generate multiple outputs from a single reference clock.

Working Principle

The 23S05E-1HDCG is an integrated device designed for the generation of programmable, high-performance frequency sources from different reference clocks. The device consists of a multi-PLL architecture with a programmable input clock counter, a frequency synthesizer, a PLL synthesis block, a spread spectrum synthesizer, and a dynamic voltage option adapter.Firstly, a reference clock is provided to the frequency synthesizer. The frequency synthesizer then processes the reference clock and generates a stable output frequency which serves as the master clock to all the other devices connected to it. This output is then processed by the input clock counter which detects and measures signal transitions, resulting in a stable reference clock.The reference clock is then processed by the PLL synthesis block to generate multiple outputs, up to a maximum of 400MHz. The outputs of this block are further processed by the spread spectrum synthesizer, which reduces electromagnetic interference. The outputs from the spread spectrum synthesizer are then fed to the dynamic voltage option adapter, which adapts the voltage levels of the output signals as per the user’s requirement. Finally, the device is also equipped with a step-lock loop (SLL) circuitry to maintain precise clocking and minimize EMI.

Conclusion

The 23S05E-1HDCG is a high-speed frequency synthesizer designed to generate stable, uniform frequency sources from a wide range of reference frequencies. It is powered by a multi-PLL architecture with a programmable input clock counter, a frequency synthesizer, an SLL, a spread spectrum synthesizer, and a dynamic voltage option adapter. Its integrated and advanced features such as programmable spread spectrum and low phase noise performance makes it an ideal choice for applications such as embedded systems and communications which require precise timing and low-jitter output frequencies.

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