MC100H646FNR2G

Clock Buffers, Drivers Overview

The MC100H646FNR2G is a high-speed clock buffer and distribution device manufactured by onsemi. It operates within the MC100H series, designed for demanding digital applications requiring precise timing. The component accepts differential ECL or TTL inputs and provides eight non-inverting TTL outputs. It supports maximum operating frequencies up to 80 MHz with a supply voltage range of 4.75 V to 5.25 V. Housed in a 28-lead PLCC package, it ensures signal integrity across industrial temperature ranges from 0°C to +85°C.

Clock Buffers, Drivers Feature Summary

• Converts differential ECL/TTL inputs to eight single-ended TTL outputs
• Supports clock distribution frequencies up to 80 MHz
• Operates on a single 5V supply (4.75V to 5.25V)
• Available in a 28-lead Plastic Leadless Chip Carrier (PLCC) surface-mount package

Clock Buffers, Drivers Applications

• High-speed data acquisition systems
• Telecommunications equipment clock distribution
• Test and measurement instrumentation
• Industrial control system timing networks

Clock Buffers, Drivers Procurement Notes

Verify RoHS compliance status as historical records indicate potential variations between leaded and lead-free versions for this part number. Confirm current availability through authorized distributors, noting that older manufacturing runs may be subject to obsolescence or limited stock conditions. Ensure the specific suffix matches project requirements for environmental standards.

Clock Buffers, Drivers Selection Notes

Select this component when interfacing ECL logic families with downstream TTL circuits in high-frequency environments. The 8-output fan-out capability makes it suitable for driving multiple synchronous loads. Verify that the 80 MHz frequency limit aligns with system clock speeds and that the PLCC-28 footprint is compatible with the PCB layout constraints.

Clock Buffers, Drivers Part Context

This device belongs to the MC100H family of high-speed ECL-to-TTL translators. It serves as a bridge between legacy high-speed ECL sources and modern TTL-based processing units. Similar parts in the series include the MC100H641 and MC100H642, which offer different output configurations or latch features for specialized clock management tasks.

Clock Buffers, Drivers Replacement Considerations

Direct pin-compatible replacements may include other MC100H series buffers like the MC100H642 if latch functionality is not required. Cross-reference with MC10H646 variants, noting differences in speed grades and RoHS compliance. Always verify electrical parameters against the original design specifications before substitution.