ICS889831AKLF

Clock Buffers, Drivers Overview

The ICS889831AKLF is a low skew, 1-to-4 differential LVPECL/ECL fanout buffer from the HiPerClockS family. It operates with a maximum output frequency exceeding 2.1 GHz and features an additive phase jitter of 0.27 ps (typical). The device supports LVPECL mode with VCC at 2.5V or 3.3V and ECL mode with VEE at -3.3V or -2.5V. It includes built-in 50Ω input termination and accepts LVDS, CML, SSTL, and LVHSTL inputs. Packaged in a 16-pin VFQFN (3mm x 3mm), it functions within a -40°C to +85°C ambient temperature range.

Clock Buffers, Drivers Feature Summary

• Maximum output frequency > 2.1 GHz with 30 ps maximum output skew
• Accepts LVDS, LVPECL, CML, SSTL, and LVHSTL differential inputs via built-in 50Ω termination
• Additive phase jitter of 0.27 ps typical (12kHz to 20MHz offset)
• Supports LVPECL (VCC=2.5V/3.3V) and ECL (VEE=-3.3V/-2.5V) supply configurations

Clock Buffers, Drivers Applications

• SONET systems
• 1 Gigabit Ethernet interfaces
• 10 Gigabit Ethernet interfaces
• Fibre Channel applications

Clock Buffers, Drivers Procurement Notes

Verify the 'FLK' suffix indicates lead-free and RoHS compliance as specified in the ordering information table. Confirm the package type is the 16-lead VFQFN with a 3mm x 3mm body. Ensure the operating environment stays within the -40°C to +85°C temperature range for standard commercial use.

Clock Buffers, Drivers Selection Notes

Select this component when interfacing various differential signal families like LVDS or CML to LVPECL/ECL loads without external input termination resistors. Choose the LVPECL supply configuration for positive voltage logic levels or the ECL configuration for negative voltage supplies. Ensure the design accommodates the 51.5°C/W thermal resistance for junction temperature calculations under full load conditions.

Clock Buffers, Drivers Part Context

This part belongs to the HiPerClockS family of high-performance clock solutions manufactured by Integrated Circuit Systems, Inc. (ICS). It is pin-compatible with the SY89831U variant. The device is designed for space-constrained applications requiring high-speed clock distribution with minimal skew.

Clock Buffers, Drivers Replacement Considerations

The datasheet explicitly states the device is pin compatible with the SY89831U. No other substitute part numbers are documented in the provided source material.

Clock Buffers, Drivers FAQ

How does the ICS889831 handle unused inputs?

To prevent oscillation and reduce noise, unused inputs should have pull-up and pull-down resistors connected to the true and complement lines, as illustrated in Figures 6 and 7 of the datasheet.

What is the purpose of the VREF_AC pin?

The VREF_AC pin allows proper offset level adjustment for AC-coupled differential inputs, facilitating easy interfacing with signal families such as LVDS, LVHSTL, and CML.

Can the ICS889831 operate with both VCC and VEE powered simultaneously?

No. The device operates in either LVPECL mode (VCC powered, VEE = 0V) or ECL mode (VEE powered, VCC = 0V). Absolute maximum ratings specify distinct supply configurations for each mode.