Renesas Electronics 2308-2DCGI8 Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 2308-2DCGI8 is a Multiplier, Zero Delay Buffer IC designed for clock/timing applications. This component integrates a Phase-Locked Loop (PLL) with bypass capability, operating at a maximum frequency of 133.3MHz with a 1:8 input-to-output ratio. The device accepts LVTTL input signals and delivers LVTTL output, housed in a 16-SOIC surface mount package.

The 2308-2DCGI8 is classified as Obsolete. Due to its discontinued status, locating original inventory may present supply chain challenges. Identifying functionally equivalent substitute components ensures design continuity and project timeline adherence.

Substiute Parts

2308-2DCGI8

Renesas Electronics CorporationIn Stock: 61092308-2DCGI8 Datasheet

Current PartRFQ

2305A-1HDCGI8

Renesas Electronics CorporationIn Stock: 11332305A-1HDCGI8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2308-2DCGI8 is determined by the following critical parameters:

Functional Compatibility Criteria:

• Clock/Timing category classification
• PLL with Bypass capability
• LVTTL input signal compatibility
• Operating voltage range: 3V ~ 3.6V
• Operating temperature range: -40°C ~ 85°C
• Surface mount technology

Acceptable Variation Parameters:

• Output signal type (LVTTL, CMOS, LVCMOS, or TTL are compatible with LVTTL input systems)
• Frequency maximum (equal to or greater than 133.3MHz)
• Input-to-output ratio (functional equivalence does not require identical multiplication ratios)
• Package form factor (alternative SOIC packages acceptable if pin count and signal routing accommodate the application)
• Product status (Active status preferred for long-term availability)

The substitute part 2305A-1HDCGI8 meets these criteria as a Zero Delay Buffer IC with PLL and bypass functionality, LVTTL input compatibility, matching voltage and temperature specifications, and Active product status.

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration: Product Status

The 2308-2DCGI8 is Obsolete. The 2305A-1HDCGI8 carries Active status, ensuring ongoing manufacturer support, documented availability, and compliance with current supply chain standards.

Compliance & Certification Alignment

Both components are ROHS3 Compliant and REACH Unaffected, meeting regulatory requirements for industrial and commercial applications. The substitute part carries improved Moisture Sensitivity Level (MSL 1 vs. MSL 3), reducing handling and storage constraints during manufacturing and assembly.

Electrical Parameter Alignment

Supply voltage (3V ~ 3.6V) and operating temperature range (-40°C ~ 85°C) are identical. Both components feature LVTTL input compatibility and PLL with bypass functionality. The substitute's maximum frequency (133MHz) is within 0.3MHz of the original specification, maintaining timing performance for most clock distribution applications.

Package & Mechanical Considerations

The substitute uses an 8-SOIC package versus the original 16-SOIC. This reduction in pin count reflects the functional difference (1:5 ratio vs. 1:8 ratio). PCB layout modifications are required to accommodate the smaller package footprint and reduced pin configuration.

Frequently Asked Questions (FAQ)

Q: Can the 2305A-1HDCGI8 directly replace the 2308-2DCGI8 without circuit modifications?

A: Direct pin-for-pin replacement is not possible due to different package types (8-SOIC vs. 16-SOIC) and pin counts. The 1:5 input-to-output ratio differs from the original 1:8 ratio. Circuit redesign is necessary to accommodate the substitute's functional specifications and physical footprint.

Q: What is the significance of the different input-to-output ratios?

A: The 2308-2DCGI8 multiplies the input clock frequency by 8, while the 2305A-1HDCGI8 multiplies by 5. Applications requiring an 8x frequency multiplication must be redesigned or an alternative substitute identified. Applications requiring 5x multiplication or lower are compatible with the substitute.

Q: Why does the substitute have a lower Moisture Sensitivity Level (MSL 1 vs. MSL 3)?

A: MSL 1 (Unlimited) indicates superior moisture resistance compared to MSL 3 (168 Hours). This is advantageous for manufacturing environments with extended lead times or storage periods, reducing the risk of moisture-induced component degradation.

Q: Are the output signal types compatible?

A: The original part outputs LVTTL signals. The substitute outputs CMOS, LVCMOS, or TTL signals. These output types are compatible with LVTTL input receivers in most clock distribution circuits, as LVTTL receivers accept TTL-compatible voltage levels.

Q: What is the impact of the frequency difference (133.3MHz vs. 133MHz)?

A: The 0.3MHz difference is negligible for most timing applications. Both frequencies support the same clock distribution bandwidth. Verify application timing margins if operating at the maximum specified frequency.

Q: Is the substitute suitable for new designs?

A: Yes. The Active product status, improved MSL rating, and ROHS3 compliance make the 2305A-1HDCGI8 suitable for new designs. Ensure the 1:5 multiplication ratio and 8-SOIC package meet application requirements.