MC100E196FN

Overview

The MC100E196FN is a 5V/EnECL programmable delay chip (PDC) designed for accurate differential ECL input edge placement. It features a digitally selectable resolution of approximately 20 ps and an analog FTUNE input for finer adjustment. The device operates in PECL mode with VCC = 4.2 V to 5.7 V or NECL mode with VEE = −4.2 V to −5.7 V. It provides a worst-case delay range of 2.0 ns, supports on-chip cascading via the D7 input, and includes internal 50 kΩ pulldown resistors. The component is housed in a PLCC-28 package.

Feature Summary

• Analog FTUNE input enables linear voltage-controlled fine-tuning of delay resolution beyond digital steps.
• On-chip cascade circuitry allows expansion of programmable range using only one additional address line per device.
• Temperature compensation ensures stable performance across the operating temperature range.
• Internal reference voltage output (VBB) facilitates single-ended input configurations.

Applications

• Differential ECL clock deskewing
• Timing adjustment in high-speed digital systems
• Edge placement applications requiring precise delay control

Procurement Notes

Verify the specific ordering suffix to confirm package type and environmental compliance. The 'FN' suffix indicates a PLCC-28 package. Confirm whether the part requires lead-free specifications by checking for the 'G' suffix. Ensure moisture sensitivity level requirements are met during storage and handling procedures.

Selection Notes

Select the MC100E196FN when analog fine-tuning is required alongside digital delay steps. Compare against the MC100E195 if the FTUNE feature is unnecessary. Verify power supply compatibility with PECL or NECL standards. Consider cascading capabilities if the total delay requirement exceeds the single-device maximum range.

Part Context

The MC100E196FN belongs to the MC100E196 series within the ECLinPS family. It shares architectural similarities with the MC100E195 but adds the FTUNE pin for enhanced resolution. The 100 Series designation indicates temperature-compensated characteristics suitable for broader industrial environments compared to the standard 10 Series.

Replacement Considerations

The MC100E195FN serves as a functional substitute if the FTUNE analog tuning capability is not required. Verify that the replacement part meets the same delay range and resolution specifications for the target application.

FAQ

How does the FTUNE input improve delay resolution?

The FTUNE input applies an analog voltage to an internal linear ramp, allowing for delay adjustments finer than the 20 ps digital least significant bit resolution.

What is the purpose of the VBB pin?

The VBB pin provides an internally generated reference voltage used for single-ended input switching references or to rebias AC-coupled inputs.

Can multiple MC100E196 devices be cascaded?

Yes, the device includes on-chip cascade logic controlled by the D7 input, allowing multiple units to be chained without external gating.