SY89296UTG

Overview

The SY89296UTG is a programmable delay line from the Precision Edge® series, manufactured by Microchip Technology. It operates on a 2.5V ±5% or 3.3V ±10% power supply and supports frequencies up to 1.5GHz. The device provides a programmable delay range of 3.2ns to 14.8ns in 10ps increments using a 10-bit control word, with an additional fine-tune capability via the FTUNE pin for approximately 40ps continuous adjustment. It features LVPECL differential inputs and outputs, low jitter performance (<10ps PP total), and is available in a 32-pin TQFP package.

Feature Summary

• Features precision LVPECL programmable delay time with guaranteed AC performance over temperature and voltage.
• Includes a 40ps/V fine tune range controlled by the FTUNE pin for analog delay adjustments.
• Supports cascading via D10 bit to extend the delay range beyond the single-device limit.
• Accepts parallel inputs for digital control bits at LVPECL, CMOS, or LVTTL logic levels.

Applications

• Clock de-skewing
• Timing adjustments
• Aperture centering

Procurement Notes

Verify that the ordering suffix 'UTG' corresponds to the lead-free NiPdAu finish and the 32-pin TQFP package type as specified in the manufacturer's ordering information. Confirm compatibility with industrial operating temperatures ranging from -40°C to +85°C. Ensure design requirements align with the specific Pb-Free package recommendations for new designs.

Selection Notes

Select the SY89296UTG when analog fine-tuning of the delay is required, distinguishing it from the SY89295U which lacks the FTUNE pin. Consider the 32-pin TQFP package if through-hole or standard surface-mount assembly methods are preferred over the MLF variant. Verify that the input signal swing and logic levels match the supported LVPECL, CMOS, or LVTTL specifications.

Part Context

The SY89296UTG belongs to Micrel’s (now Microchip) high-speed Precision Edge product line. It serves as an enhanced version of the SY89295U by adding analog fine-tune control capabilities. This component is designed for applications requiring precise timing alignment in high-frequency clock distribution networks.

Replacement Considerations

The SY89295U is a related part within the same family but lacks the FTUNE pin for analog fine-tuning. Designers requiring only discrete step delays may consider this alternative, though functional differences regarding fine-tuning must be evaluated.

FAQ

How does the SY89296UTG handle floating input pins?

The IN and /IN pins default to an equivalent low state when left floating. Similarly, the D control bits contain pull-downs and default LOW when unconnected.

What is the purpose of the VBB pin?

The VBB pin provides an internally generated reference voltage output. It is used to bias the unused input of a differential pair when using a single-ended source or to re-bias AC-coupled inputs.

Can the device be cascaded to increase delay range?

Yes, two or more devices can be cascaded using the D10 bit and the Cascade/CASCADE outputs to extend the total delay range.