ICS8531AY-01T Equivalent & Substitute Parts

Part Overview

The ICS8531AY-01T is a Clock Fanout Buffer (Distribution) Multiplexer IC manufactured by Renesas Electronics Corporation. This device functions as a 2:9 clock distribution buffer operating at a maximum frequency of 500 MHz with LVPECL output. The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility through equivalent input/output ratios, frequency capabilities, and signal integrity specifications.

Substiute Parts

ICS8531AY-01T

Renesas Electronics CorporationIn Stock: 1606ICS8531AY-01T Datasheet

Current PartRFQ

MC100LVEP111FARG

onsemiIn Stock: 31267MC100LVEP111FARG Datasheet

MFR RecommendedRFQ

SY89809ALTZ

Microchip TechnologyIn Stock: 2274SY89809ALTZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ICS8531AY-01T are selected based on the following critical parameters:

Primary Substitution Criteria:

• Fanout Buffer (Distribution) Multiplexer functionality
• Input:Output ratio of 2:9 or higher (2:10 acceptable for expanded capability)
• Maximum frequency capability at or above 500 MHz
• Differential input and output support
• 32-pin LQFP package compatibility
• Surface mount technology

Secondary Compatibility Factors:

• Input signal type compatibility (LVPECL, LVDS, HSTL, PECL, ECL)
• Output signal type compatibility (LVPECL, PECL, ECL, HSTL)
• Supply voltage overlap with 3.135V ~ 3.465V range
• Operating temperature range coverage

The two qualified substitutes meet these criteria with enhanced specifications in frequency capability and product status, though with different output signal configurations and temperature ranges.

Parameter Comparison

Engineering Selection Recommendations

MC100LVEP111FARG (onsemi): This substitute provides the highest frequency capability at 3 GHz with a 2:10 output ratio, exceeding the original 500 MHz specification. The device supports LVDS and PECL input/output compatibility with the ICS8531AY-01T. Supply voltage range of 2.375V ~ 3.8V encompasses the original 3.135V ~ 3.465V specification. The part is ROHS3 compliant and carries active product status, ensuring long-term availability. Operating temperature range extends to -40°C ~ 85°C, providing broader environmental coverage. Moisture sensitivity level of 2 (1 Year) represents improved handling characteristics compared to the original part.

SY89809ALTZ (Microchip Technology): This substitute maintains the exact 2:9 input:output ratio of the original ICS8531AY-01T with a maximum frequency of 750 MHz, providing a 50% frequency margin above the 500 MHz requirement. The device is ROHS3 compliant with active product status. Moisture sensitivity level of 1 (Unlimited) offers superior handling and storage characteristics. Operating temperature range of 0°C ~ 85°C aligns with the original lower bound while extending the upper limit. Supply voltage range of 3V ~ 3.6V overlaps with the original specification. Output signal type is HSTL rather than LVPECL, requiring signal integrity verification in the target application.

Both substitutes are active products with improved compliance and availability compared to the obsolete ICS8531AY-01T. Selection between them depends on output signal type requirements and frequency headroom needs for the specific application.

Frequently Asked Questions (FAQ)

Q: Can MC100LVEP111FARG replace ICS8531AY-01T in all applications?

A: MC100LVEP111FARG is functionally compatible as a fanout buffer multiplexer with superior frequency capability (3 GHz vs. 500 MHz) and a 2:10 ratio versus the original 2:9. However, output signal type differs (ECL/PECL vs. LVPECL), requiring verification that the receiving circuitry accepts these signal levels. Supply voltage and temperature ranges are broader, supporting wider operational envelopes.

Q: What is the key difference between the two substitute parts?

A: MC100LVEP111FARG offers higher frequency (3 GHz) and expanded output ratio (2:10) with ECL/PECL output compatibility. SY89809ALTZ maintains the original 2:9 ratio with 750 MHz frequency and HSTL output. SY89809ALTZ provides better moisture sensitivity (MSL 1 vs. MSL 2) and matches the original input:output ratio more closely.

Q: Are the package dimensions identical between all three parts?

A: ICS8531AY-01T and MC100LVEP111FARG both use 32-LQFP (7x7) packages with identical footprints. SY89809ALTZ uses 32-TQFP (7x7), which shares the same 7x7mm body size but may have minor pin configuration differences. PCB layout verification is required before substitution.

Q: What compliance improvements do the substitute parts offer?

A: Both MC100LVEP111FARG and SY89809ALTZ are ROHS3 compliant, whereas the original ICS8531AY-01T is RoHS non-compliant. Both substitutes carry active product status, ensuring continued manufacturing and availability. Moisture sensitivity levels are improved (MSL 2 and MSL 1 respectively vs. MSL 3 for the original).

Q: Can I use SY89809ALTZ if my application requires LVPECL output?

A: SY89809ALTZ provides HSTL output, not LVPECL. If LVPECL output is mandatory, MC100LVEP111FARG with PECL output capability is the appropriate choice, though signal level translation may be required depending on receiver specifications.

Q: What is the frequency margin when using these substitutes?

A: SY89809ALTZ provides 250 MHz margin (750 MHz vs. 500 MHz requirement). MC100LVEP111FARG provides 2.5 GHz margin (3 GHz vs. 500 MHz requirement), offering significantly greater frequency headroom for future design iterations or signal integrity optimization.