ICS556M-04I

Clock Buffers, Drivers Overview

The ICS556M-04I is a quad LVDS oscillator and buffer manufactured by Renesas Electronics Corporation, derived from the IDT ICS556-03 architecture. It generates four differential LVDS clock outputs using an external 25 MHz crystal without additional components. The device operates at a nominal supply voltage of 2.5 V (range 2.375 V to 2.625 V) with low phase jitter (<1 ps RMS from 10 kHz to 10 MHz). Key electrical parameters include a maximum output frequency of 25 MHz, channel-to-channel skew of 20–100 ps, and part-to-part skew of 1.5 ns. It is housed in a 16-pin TSSOP package.

Clock Buffers, Drivers Feature Summary

• Quad differential LVDS outputs generated from a single 25 MHz crystal input
• Low phase jitter specification of less than 1 ps RMS integrated from 10 kHz to 10 MHz
• Requires no external components other than the crystal and decoupling capacitors
• Individual enable pins (EN1-EN4) allow independent control of each output pair

Clock Buffers, Drivers Applications

• Clock generation for high-speed digital systems requiring low jitter
• Distributed clock distribution networks utilizing LVDS interfaces
• Data communication equipment requiring precise timing signals

Clock Buffers, Drivers Procurement Notes

Verify component authenticity as this model originates from Integrated Device Technology (IDT), which was acquired by Renesas Electronics. Confirm that the specific ordering suffix matches the required temperature range and packaging format (Tube or Tape & Reel). Check for end-of-life status regarding non-green parts, as noted in historical documentation.

Clock Buffers, Drivers Selection Notes

Select this component when a fixed 25 MHz frequency is required with minimal external circuitry. Ensure the design accommodates a 2.5 V power supply and provides 100-ohm differential termination near the receiver inputs. Verify that the operating temperature range aligns with the specific suffix variant selected, as ratings vary between commercial and industrial grades.

Clock Buffers, Drivers Part Context

This part belongs to the ICS556 family of clock oscillators. The 'M' and '04I' suffixes typically denote specific manufacturing revisions, temperature ranges, or packaging configurations distinct from the base ICS556-03 model. While functionally similar to the ICS556-03, exact pinout and electrical characteristics should be validated against the specific datasheet for the full part number.

Clock Buffers, Drivers Replacement Considerations

Direct replacements include the ICS556-03 variants such as 556G-03ILF or 556G-03ILFT. When substituting, verify that the replacement part supports the same 25 MHz crystal requirement and LVDS output configuration. Ensure the new part's temperature range and package dimensions are compatible with the existing PCB layout.