2308-1HPGG

Overview

The IDT2308-1HPGG is a 3.3V Zero Delay Clock Multiplier manufactured by Renesas Electronics Corporation, designed for high-speed clock distribution and multiplication applications operating between 10MHz and 133MHz. It features a Phase-Lock Loop (PLL) architecture that aligns the phase of incoming clocks with output clocks to achieve zero delay. The device provides eight outputs organized into two banks of four, controlled via select addresses. Key electrical specifications include a maximum frequency of 133.3MHz, an input voltage range of 3V to 3.6V, and cycle-to-cycle jitter of less than 200ps. It operates within a commercial temperature range of 0°C to 70°C and is housed in a 16-TSSOP package.

Feature Summary

• Zero Delay Buffer: Synchronizes outputs to the clock input using an external feedback pin to eliminate propagation delay.
• Low Jitter Performance: Achieves less than 200ps cycle-to-cycle jitter and output skew under 200ps.
• Dual Output Banks: Distributes one clock input to two independent banks of four outputs, each with separate enable control.
• Flexible Input/Output: Accepts LVCMOS/LVTTL inputs and provides LVTTL outputs without requiring an external RC network.

Applications

• High-speed clock distribution systems requiring precise timing alignment.
• Multiplication applications ranging from 10MHz to 133MHz operating frequencies.
• System testing modes where the PLL can be bypassed to drive outputs directly from the input clock.

Procurement Notes

The IDT2308-1HPGG is listed as obsolete and no longer manufactured. Verification of availability should focus on surplus or secondary market sources rather than direct distributor stock. Buyers must confirm RoHS compliance status, as specific listings indicate non-compliance with current environmental standards. Replacement components such as the CDCVF25081PW are available from Texas Instruments for new designs.

Selection Notes

Select this component only if the design requires a 1:8 ratio zero-delay buffer with LVTTL interfaces and 3.3V operation. Ensure the application frequency does not exceed 133.3MHz. Verify that the PCB layout supports the 16-TSSOP package dimensions (5.0 x 4.4mm). Consider the commercial temperature range (0°C to 70°C) against environmental requirements. For new designs, evaluate modern replacements due to the part's discontinued status.

Part Context

This component belongs to the IDT2308 family of clock multipliers, which includes variants like IDT2308-2 and IDT2308-3 offering different prescaling options. The Renesas Electronics timing product portfolio has been acquired by SiTime, with full transition expected by the end of 2026. Documentation and support remain available through official channels during this transition period.

Replacement Considerations

Publicly confirmed substitute part numbers include the CDCVF25081PW and CDCVF25081PWR from Texas Instruments. These devices serve as upgrade alternatives for the discontinued IDT2308 series. Designers should verify pin compatibility and electrical parameter alignment before substitution.