SY89296UMI

Overview

The SY89296UMI is a programmable delay line from the Precision Edge® series, manufactured by Microchip Technology. It provides a delay range of 3.2ns to 14.8ns in 10ps increments, with an additional 40ps fine-tune control via the FTUNE pin. The device operates on a 2.5V ±5% or 3.3V ±10% supply and supports frequencies up to 1.5GHz. It features LVPECL inputs and outputs, low jitter (<10ps PP total), and accepts CMOS/TTL control signals. Available in a 32-pin MLF package, it functions within an industrial temperature range of –40°C to +85°C.

Feature Summary

• Programmable delay adjustment using digital control signals
• Fine-tune voltage control for continuous delay variation
• Low-jitter design ensuring signal integrity at high speeds
• Supports cascading for extended delay ranges

Applications

• Clock de-skewing
• Timing adjustments
• Aperture centering

Procurement Notes

Verify the specific ordering suffix (e.g., UMI vs. UMITR) to confirm the required packaging format, such as tube or tape and reel. Confirm lead finish options, including Sn-Pb or Pb-Free variants, align with assembly requirements. Ensure the selected part number matches the desired operating temperature range and package type before finalizing procurement.

Selection Notes

Select the SY89296UMI when analog fine-tuning capability is required, distinguishing it from the SY89295U which lacks this feature. Consider the 32-pin MLF package for compact designs. Verify that the control logic interface (CMOS/LVTTL vs. ECL) matches the system's control voltage levels. Ensure power supply stability meets the specified 2.5V or 3.3V tolerances for optimal performance.

Part Context

The SY89296UMI belongs to Micrel’s Precision Edge® product line, now under Microchip Technology. It is designed for high-speed applications requiring precise timing control. The device complements other delay lines like the SY89295U but adds analog fine-tune functionality. It is suitable for systems needing adjustable latency with minimal jitter degradation over varying temperatures and voltages.

Replacement Considerations

The SY89295U serves as a related component but lacks the FTUNE pin for analog fine-tuning. When replacing the SY89296UMI, verify if the analog control input is necessary for the application. If fine-tuning is not required, the SY89295U may be considered, provided the pinout and functional differences are accounted for in the design.

FAQ

How does the SY89296UMI handle single-ended inputs?

For single-ended operation, connect the signal to IN or /IN and use the VBB pin to bias the unused input of the differential pair. This configuration is functional only at 3.3V.

What is the purpose of the D10 pin?

The D10 pin is used to cascade multiple SY89296U devices to extend the total delay range. It drives the CASCADE and /CASCADE outputs for inter-device synchronization.

Can the control inputs accept TTL levels?

Yes, the control register interface accepts CMOS or TTL level signals. Proper biasing of the VCF and VEF pins is required to set the logic transition thresholds for these standards.