ICS551M

Clock Buffers, Drivers Overview

The ICS551M is a low-cost, high-speed single-input to four-output clock buffer from the IDT ClockBlocks family. It operates on a supply voltage of 3.0V to 5.5V and supports input/output clock frequencies up to 160 MHz. The device features non-inverting outputs with a maximum output-to-output skew of 250 ps. Propagation delay ranges from 4 ns to 8 ns depending on voltage and temperature conditions. It utilizes an advanced, low-power CMOS process and includes an Output Enable mode that tri-states outputs when driven low.

Clock Buffers, Drivers Feature Summary

• Single input to four output fan-out buffer configuration
• Low skew outputs (250 ps typical) for precise timing
• Input/Output frequency support up to 160 MHz
• Operating voltage range of 3.0 V to 5.5 V
• 8-pin SOIC package with internal pull-up resistors

Clock Buffers, Drivers Applications

• Networking clock distribution
• General-purpose clock buffering in commercial electronics
• Industrial control systems requiring low-cost clock solutions

Clock Buffers, Drivers Procurement Notes

Verify the specific suffix for the required temperature grade: 'MI' or 'MILF' indicates industrial (-40°C to +85°C), while 'M' or 'MLF' indicates commercial (0°C to +70°C). Confirm RoHS compliance by checking for 'LF' or 'LN' suffixes. Note that non-green parts have reached End-of-Life status as per manufacturer documentation.

Clock Buffers, Drivers Selection Notes

Select the ICS551M variant based on the required ambient operating temperature range. Ensure the power supply voltage falls within the 3.0 V to 5.5 V specification. For PCB layout, place a 0.01 µF decoupling capacitor close to the VDD pin and consider using 33Ω series terminating resistors if trace lengths exceed one inch.

Clock Buffers, Drivers Part Context

The ICS551 is part of the IDT ClockBlocks family, designed as a cost-effective solution for clock distribution. It serves as a foundational component for synchronizing clocks in systems where low jitter PLLs are not required. Related variants include the ICS552-02B, which offers a dual version in a 20-pin QSOP package.

Clock Buffers, Drivers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided datasheet. Designers should consult the manufacturer for current alternatives or verify compatibility with existing system timing requirements before swapping components.