SY89321LMG-TR

Translators, Level Shifters Overview

The SY89321LMG-TR is a differential LVPECL, CML, and LVDS to LVTTL translator powered by a single +3.3V supply. It features a typical propagation delay of 1.9ns and a maximum frequency (fMAX) of 275MHz. The device includes internal input resistors, with a pulldown on IN and both pullup/pulldown on /IN. It provides a VBB output for biasing and ensures the Q output defaults LOW when inputs are open. The component is housed in an ultra-small 8-pin MLF package measuring 2mm x 2mm.

Translators, Level Shifters Feature Summary

• Translates differential LVPECL, CML, or LVDS signals to single-ended LVTTL levels using a single 3.3V power supply.
• Includes internal biasing resistors on inputs and a dedicated VBB reference voltage output for interface flexibility.
• Ensures system stability by forcing the Q output LOW under open input conditions.
• Delivers high-speed performance with low skew and minimal propagation delay in a compact footprint.

Translators, Level Shifters Applications

• Clock signal translation in space-constrained digital systems
• Data signal level shifting between differential sources and TTL logic
• High-density board designs requiring minimal component footprint

Translators, Level Shifters Procurement Notes

Verify the specific ordering suffix 'MG' indicates the Pb-Free NiPdAu lead finish as documented in the manufacturer's ordering information. Confirm that the industrial temperature range (-40°C to +85°C) aligns with your operational environment requirements. Ensure proper thermal management by soldering the exposed pad to a ground plane, as specified in the package notes for effective heat dissipation.

Translators, Level Shifters Selection Notes

Select this component when translating LVPECL, CML, or LVDS signals to LVTTL within a strict space limitation. It serves as a functional equivalent to the SY100EPT21L but utilizes a significantly smaller 8-pin MLF package. Choose this part for applications prioritizing low power consumption and reduced board area over higher pin counts or alternative package styles.

Translators, Level Shifters Part Context

This device belongs to Micrel's Precision Edge family of high-speed translators. It is functionally equivalent to the SY100EPT21L but offers a 70% smaller footprint through its 8-pin MLF packaging. The series targets applications where minimal space, low power, and cost efficiency are critical design constraints for clock and data signal translation.

Translators, Level Shifters Replacement Considerations

The SY100EPT21L is identified as a functionally equivalent part. Note that the SY100EPT21L uses a different package type compared to the SY89321LMG-TR. Verify pinout compatibility and physical dimensions before substitution to ensure mechanical fit and electrical equivalence in the target design.

Translators, Level Shifters FAQ

How does the device behave if the differential inputs are left open?

Under open input conditions, the /IN input is biased at a VCC/2 voltage level while the IN input is pulled to ground. This configuration forces the Q output LOW to provide added stability.

What is the purpose of the VBB output pin?

The VBB output provides a reference voltage equal to VCC minus 1.3V. It is used to bias differential, single-ended, or AC-coupled interfaces to the IN and /IN inputs.