NB2305AC1HDTG

Overview

The NB2305AC1HDTG is a 3.3 V zero delay clock buffer manufactured by onsemi, designed for distributing high-speed clocks in commercial applications. It accepts one reference input and drives five low-skew outputs using an internal PLL locked to the REF pin. The device operates within a frequency range of 15 MHz to 133 MHz and utilizes advanced 0.35 µm CMOS technology. Key electrical specifications include output-to-output skew less than 250 ps, device-to-device skew less than 700 ps, and cycle-to-cycle jitter under 200 ps. The component is housed in an 8-pin TSSOP package (CASE 948J) and supports supply voltages from 3.0 V to 3.6 V.

Feature Summary

• Zero Input-Output Propagation Delay via internal PLL feedback
• Five buffered outputs with skew less than 250 ps
• Device-to-device skew guaranteed less than 700 ps
• Cycle-to-cycle jitter less than 200 ps

Applications

• Distribution of CPU and PCI bus frequencies
• Clock distribution in Pentium-based systems
• High-speed digital circuit synchronization

Procurement Notes

Verify the ordering suffix 'C' confirms the commercial temperature range (0°C to 70°C). Confirm the '1H' designation indicates the high-drive version with faster rise/fall times compared to standard variants. Ensure the 'DTG' suffix corresponds to the lead-free TSSOP-8 package configuration as specified in the manufacturer's ordering table.

Selection Notes

Select this variant for commercial environments requiring high drive strength and low skew. Verify that the load capacitance requirements are met: 30 pF for frequencies below 100 MHz and 10 pF for frequencies between 100 MHz and 133 MHz. Ensure all outputs, including CLKOUT, have equal capacitive loading to maintain zero input-output delay characteristics.

Part Context

This part belongs to the NB2305A family of 3.3 V zero delay buffers. The specific model NB2305AC1HDTG represents the commercial grade (-C), high-drive capability (-1H), tape-and-reel packaging (-T), and lead-free construction (-G) within the SOIC/TSSOP 8-pin form factor.

Replacement Considerations

Direct substitutes within the same family include NB2305AI1HDTG for industrial temperature ranges or NB2305AC1DTG for standard drive versions. Cross-vendor equivalents such as ICS2305MI-1H may be considered if pin compatibility and electrical parameters align.