8305AGI-02LF

Overview

The ICS8305AGI-02LF is a low skew, 1-to-4 multiplexed differential/LVCMOS-to-LVCMOS fanout buffer manufactured by Renesas Electronics Corporation. It features selectable clock inputs accepting either differential (LVPECL, LVDS, LVHSTL, HCSL) or single-ended (LVCMOS, LVTTL) levels. The device provides four LVCMOS/LVTTL outputs organized into two independent banks with separate supply pins (VDDO_A, VDDO_B). It supports core/output voltage configurations of 3.3V/3.3V, 3.3V/2.5V, 3.3V/1.8V, and 3.3V/1.5V. Maximum output frequency is 250MHz, with an output skew of 100ps maximum and part-to-part skew of 900ps maximum.

Feature Summary

• Four LVCMOS/LVTTL outputs divided into two independent banks (QA0/QA1 and QB0/QB1)
• Selectable differential CLK/nCLK pair or single-ended LVCMOS_CLK input
• Supports multiple power supply modes: Core 3.3V with Output 3.3V, 2.5V, 1.8V, or 1.5V
• Internally synchronized clock enable to eliminate runt pulses

Applications

• Clock distribution in high-performance computing systems
• Voltage translation between different logic families
• Low skew clock buffering for memory interfaces

Procurement Notes

Verify the component status as the datasheet indicates it was originally produced by Integrated Device Technology (IDT), which has since been acquired by Renesas Electronics. Confirm availability through official Renesas channels or authorized distributors, as older IDT-branded stock may be subject to discontinuation notices. Ensure the specific ordering suffix matches the required packaging format (Tube vs Tape & Reel).

Selection Notes

Select this component when a 1-to-4 fanout buffer with low skew characteristics is required. Ensure the application utilizes compatible input signal types (LVPECL, LVDS, LVHSTL, HCSL, LVCMOS, or LVTTL). Verify that the target output voltage requirements align with the available VDDO options (3.3V, 2.5V, 1.8V, or 1.5V). Consider the thermal resistance (100.3°C/W) and total power dissipation calculations if operating at maximum frequencies with all outputs loaded.

Part Context

This component belongs to the ICS8305 family of low skew fanout buffers. It is functionally similar to other parts in the series but specifically configured for 1-to-4 multiplexing with dual-bank output control. The 'AGI' designation typically refers to the lead-free RoHS compliant version in the 16-lead TSSOP package.

Replacement Considerations

Direct functional replacements within the same family include variants like the ICS8305AGILF or ICS8305AGIT, though pinouts and specific electrical characteristics should be verified against the new part's datasheet. Cross-referencing with newer Renesas timing solutions is recommended for long-term supply chain stability.

FAQ

What are the supported differential input levels?

The CLK/nCLK pair accepts LVPECL, LVDS, LVHSTL, and HCSL differential input levels.

How is the output impedance determined?

The output impedance varies based on the VDDO supply voltage: 9Ω at 3.3V, 11Ω at 2.5V, 15Ω at 1.8V, and 20Ω at 1.5V.

Can unused inputs be left floating?

Yes, unused CLK/nCLK and LVCMOS_CLK inputs can be left floating, though adding a 1kΩ resistor to ground is recommended for additional protection.