8305AGLF

Overview

The 8305AGLF is a low skew, 1-to-4 multiplexed differential/LVCMOS-to-LVCMOS/LVTTL fanout buffer manufactured by Renesas Electronics. It operates within a 0°C to +70°C ambient temperature range and is housed in a 16-pin TSSOP package. The device supports selectable clock inputs, accepting either differential signals (LVPECL, LVDS, LVHSTL, HCSL, SSTL) or single-ended levels (LVCMOS, LVTTL). Key electrical specifications include a maximum output frequency of 350 MHz, a maximum output skew of 35 ps, and a part-to-part skew of 700 ps. Typical additive phase jitter is 0.04 ps RMS.

Feature Summary

• Multiplexed input capability allowing selection between differential pairs (CLK, nCLK) and single-ended LVCMOS/LVTTL sources.
• Low skew performance with a maximum output skew of 35 ps and typical additive phase jitter of 0.04 ps RMS.
• Flexible power supply modes supporting Core/Output combinations of 3.3V/3.3V, 3.3V/2.5V, 3.3V/1.8V, and 3.3V/1.5V.
• Internally synchronized clock enable to eliminate runt pulses during asynchronous assertion or deassertion.

Applications

• Clock distribution networks requiring precise timing alignment.
• Systems utilizing mixed signal standards such as LVDS to LVCMOS translation.
• High-speed digital circuits demanding low jitter and defined repeatability.

Procurement Notes

The 8305AGLF is classified as an obsolete product. Verification of availability should focus on surplus distributors or secondary markets, as standard manufacturing channels no longer support this part number. Confirm RoHS compliance status and specific lot dates when sourcing from non-original suppliers.

Selection Notes

Select the 8305AGLF for applications requiring a 1:4 fanout with multiplexed input options. Ensure the design accommodates the specified voltage domains, particularly the 3.3V core requirement. Verify that the 350 MHz maximum frequency meets system requirements and that the 35 ps skew specification satisfies timing constraints.

Part Context

This component belongs to the 8305 family of high-performance clock solutions. It serves as a fanout buffer designed to drive multiple loads while maintaining signal integrity. The device integrates features for board-level testing via tri-state outputs and ensures stable operation through internal synchronization mechanisms.

Replacement Considerations

As the 8305AGLF is obsolete, verify functional equivalents within the same family or newer generations. Check datasheets for compatible pinouts, voltage levels, and skew specifications to ensure direct replacement viability without circuit redesign.

FAQ

What input signal types does the 8305AGLF support?

It supports selectable differential inputs (LVPECL, LVDS, LVHSTL, HCSL, SSTL) and single-ended LVCMOS or LVTTL inputs.

What is the maximum operating frequency?

The maximum output frequency is 350 MHz.

How is the clock enable handled internally?

The clock enable is internally synchronized to prevent runt pulses on the outputs during asynchronous assertion or deassertion.