ICS581G-01

Clock Generators, PLLs, Frequency Synthesizers Overview

The ICS581G-01 is a glitch-free, Phase Locked Loop (PLL) based clock multiplexer with zero delay from input to output. It features four low skew outputs configurable as one, three, or four simultaneous outputs. The device allows user control over mux switching via the SELA pin and operates within a frequency range of 6 MHz to 200 MHz. It supports SpreadSmart technology for spread spectrum compatibility and provides duty cycle correction with a 50% output duty cycle. The component is housed in a 16-pin TSSOP package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Glitch-free PLL-based clock multiplexing with zero input-to-output delay
• Four low skew CMOS outputs with selectable configuration (1, 3, or 4 outputs)
• User-controlled mux switching via SELA pin
• Operates from 6 MHz to 200 MHz with SpreadSmart technology support

Clock Generators, PLLs, Frequency Synthesizers Applications

• Systems requiring backup or redundant clocks
• Clock distribution networks needing glitch-free switching
• Applications requiring duty cycle correction

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix for temperature range and packaging. Standard commercial grade parts operate from 0°C to +70°C, while industrial variants (-I suffix) cover -40°C to +85°C. Packaging options include tubes and tape-and-reel configurations. Confirm RoHS compliance status if lead-free specifications are required for the assembly process.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the ICS581G-01 when manual control of clock source switching is required via the SELA pin. Ensure the operating frequency falls within the specified ranges defined by S0 and S1 pins: 6-19 MHz, 19-75 MHz, 50-150 MHz, or 150-200 MHz. Connect one of the CLK outputs to the FBIN pin to establish the zero-delay feedback loop. Use series termination resistors near the chip for signal integrity.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The ICS581G-01 belongs to the IDT ClockBlocks family of clock generation and distribution devices. It is functionally similar to the ICS581-02 but differs in that the -01 variant requires external logic or microcontroller intervention to switch between clock inputs, whereas the -02 handles this automatically. For non-PLL applications, the ICS580-01 is an alternative.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The ICS581G-02 serves as a direct functional replacement if automatic switching capability is acceptable or desired instead of manual control. Both share identical electrical characteristics, pinouts, and package dimensions.