MC88915TFN100

Clock Generators, PLLs, Frequency Synthesizers Overview

The MC88915TFN100 is a low skew CMOS PLL clock driver manufactured by NXP USA Inc. (originally Motorola). It utilizes phase-locked loop technology to lock output frequency and phase onto an input reference clock, designed for high-performance PC and workstation clock distribution. The device features five Q outputs (Q0–Q4) with less than 500 ps skew, plus inverted Q5, doubled 2X_Q, and divided Q/2 outputs. It operates at a maximum frequency of 100 MHz on the 2X_Q output and 50 MHz on the Q outputs. Electrical characteristics include ±36 mA drive current, TTL-compatible inputs, and a 5V supply voltage range of 4.75V to 5.25V.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Phase-Locked Loop Technology: Locks low skew outputs' frequency and phase to a single input reference clock.
• Multiple Output Configurations: Provides Q0-Q4, inverted Q5, doubled 2X_Q, and divided Q/2 outputs.
• Low Skew Performance: Output-to-output skew between Q0-Q4 rising edges is guaranteed less than 500 ps.
• Programmable Frequency Ratios: Supports 1:2, 1:1, and 2:1 input/output phase-locked frequency ratios via feedback configuration.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Clock distribution for high-performance personal computers.
• Clock distribution for workstations requiring synchronous multi-board locking.
• System designs requiring local distribution of multiplied system frequencies.

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify component authenticity as this part originates from legacy Motorola manufacturing lines now under NXP USA Inc. Confirm package integrity for the 28-lead PLCC (FN suffix) format. Check datasheet revisions for specific AC characteristic guarantees, as some specifications rely on statistical characterization rather than direct ATE testing. Ensure compatibility with 5V logic levels and verify thermal dissipation requirements for the target operating temperature range of -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the MC88915TFN100 when a maximum 2X_Q output frequency of 100 MHz is required. Compare against TFN55 (55 MHz max) or TFN70 (70 MHz max) if lower speeds suffice. Ensure the application supports the 5V supply voltage; use the MC88LV915T for 3.3V systems. Verify that the board layout can accommodate the necessary 50Ω termination networks specified for accurate rise/fall time and pulse width measurements.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The MC88915T series includes versions rated for 55, 70, 100, 133, and 160 MHz. The TFN100 variant specifically targets the 100 MHz 2X_Q output capability. This family was designed to replace older clock drivers in high-speed computing architectures, offering integrated PLL functionality to reduce external component count and improve timing accuracy across multiple system boards.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

For 3.3V applications, consider the MC88LV915T. For different frequency requirements within the same package, evaluate MC88915TFN55, TFN70, TFN133, or TFN160. No direct modern cross-references are documented in the provided source material.