8S89202BKILF

Clock Buffers, Drivers Overview

The 8S89202 is a high-speed clock divider and distribution component manufactured by Renesas Electronics Corporation, originally designed by Integrated Device Technology. It functions as a low skew, 2:1 LVPECL multiplexer with a 1:8 fanout capability and internal termination. The device accepts differential inputs in LVPECL, LVDS, or CML formats and provides three banks of LVPECL outputs. Key electrical parameters include a maximum input frequency of 3 GHz and a maximum output frequency of 1.5 GHz. It operates on full 2.5V ±5% or 3.3V ±10% supply voltages within an ambient temperature range of -40°C to +85°C.

Clock Buffers, Drivers Feature Summary

• Three output banks providing eight total LVPECL differential output pairs with selectable ÷1, ÷2, or ÷4 division ratios per bank.
• Internal 50Ω termination on IN/nIN inputs allows direct interfacing with LVPECL, LVDS, and CML signal families.
• Low skew performance with typical bank-to-bank skew of 6ps and part-to-part skew of 250ps maximum.
• Additive phase jitter of 0.166ps RMS (typical) measured at 156.25MHz with a 12kHz to 20MHz integration range.

Clock Buffers, Drivers Applications

• SONET network infrastructure timing
• 1 Gigabit and 10 Gigabit Ethernet systems
• Fibre Channel data transmission links

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix for packaging configuration. The 'BKILF' variant indicates a tray package, while 'BKILFT' denotes tape and reel with EIA-481-C pin orientation. The '/W' suffix specifies tape and reel with EIA-481-D pin orientation. Confirm RoHS compliance status and lead-free certification requirements against current manufacturing standards before procurement.

Clock Buffers, Drivers Selection Notes

Select this component when designing systems requiring precise clock distribution with minimal skew across multiple loads. Ensure the input source matches the supported differential signaling levels (LVPECL, LVDS, CML). Verify that the PCB layout accommodates the 32-lead VFQFN package dimensions and includes thermal vias for the exposed pad to manage heat dissipation effectively under worst-case power conditions.

Clock Buffers, Drivers Part Context

This device belongs to the IDT 8S89200 series of high-performance clock solutions. It was acquired by Renesas Electronics Corporation following the merger with IDT. The component serves as a specialized timing solution for high-speed digital interfaces, replacing older discrete buffer designs with integrated multiplexing and division capabilities in a compact form factor.

Clock Buffers, Drivers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Renesas Electronics for current equivalent products or cross-reference with other manufacturers offering similar low-skew LVPECL dividers with internal termination if discontinuation occurs.

Clock Buffers, Drivers FAQ

How does the internal termination affect input interface design?

The IN and nIN pins feature built-in 50Ω resistors connected to the VT pin. This allows direct connection to LVDS, LVPECL, and CML drivers without external series or parallel termination resistors, simplifying the schematic and reducing component count.

What is the function of the DIVSEL_A, DIVSEL_B, and DIVSEL_C pins?

These pins control the output division ratio for their respective output banks (A, B, and C). By setting these pins to logic high or low, users can independently configure each bank to operate at ÷1, ÷2, or ÷4 frequencies relative to the input clock.

How should unused LVPECL outputs be handled?

Unused LVPECL output pairs can be left floating. However, it is recommended that no trace be attached to these pins to prevent potential noise coupling or signal integrity issues on the PCB.