49FCT805APYG Equivalent & Substitute Parts

Part Overview

The 49FCT805APYG is a Clock Fanout Buffer (Distribution) IC manufactured by Renesas Electronics Corporation, configured as a 1:5 clock distribution device in a 20-SSOP package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The device provides clock signal distribution with CMOS and LVTTL input/output compatibility, operating within a 4.75V to 5.25V supply voltage range and a 0°C to 70°C temperature range.

Substiute Parts

49FCT805APYG

Renesas Electronics CorporationIn Stock: 217349FCT805APYG Datasheet

Current PartRFQ

8L30210NLGI

Renesas Electronics CorporationIn Stock: 9638L30210NLGI Datasheet

MFR RecommendedRFQ

PI49FCT3805CHE

Diodes IncorporatedIn Stock: 4494PI49FCT3805CHE Datasheet

MFR RecommendedRFQ

PI49FCT3805DHEX

Diodes IncorporatedIn Stock: 6960PI49FCT3805DHEX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 49FCT805APYG is determined by the following critical parameters: input/output ratio (1:5), package type (20-SSOP), number of circuits (2), input/output signal compatibility (CMOS/LVTTL), and surface mount configuration. The substitute parts are grouped into two categories based on their compatibility with these core specifications:

Category 1: Direct Package and Ratio Match PI49FCT3805CHE and PI49FCT3805DHEX maintain the identical 1:5 input:output ratio, 20-SSOP package, 2-circuit configuration, and surface mount type. Both are manufactured by Diodes Incorporated and remain in active product status. These parts differ in maximum frequency specification (100 MHz and 133 MHz respectively) and supply voltage range (3V ~ 3.6V versus the original 4.75V ~ 5.25V).

Category 2: Alternative Ratio and Package 8L30210NLGI, manufactured by Renesas Electronics Corporation, provides a 3:10 input:output ratio in a 32-VFQFN package with a single circuit. This part operates at higher frequencies (200 MHz maximum) and supports a broader range of input types (HCSL, LVCMOS, LVDS, LVPECL, LVTTL, Crystal) with lower supply voltage requirements (1.4V ~ 3.465V). This substitute is suitable only when the application can accommodate different package geometry and circuit configuration.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring direct form-fit-function replacement, PI49FCT3805CHE and PI49FCT3805DHEX are the primary substitutes. Both maintain the 20-SSOP package footprint, 1:5 distribution ratio, and dual-circuit configuration of the original 49FCT805APYG. These Diodes Incorporated parts are in active production status and carry ROHS3 compliance certification. The primary design consideration is the reduced supply voltage range (3V ~ 3.6V versus 4.75V ~ 5.25V), which requires circuit-level voltage compatibility verification. PI49FCT3805DHEX provides higher frequency capability (133 MHz) compared to PI49FCT3805CHE (100 MHz).

The 8L30210NLGI substitute from Renesas Electronics Corporation is suitable only when PCB layout can accommodate a 32-VFQFN package and the application logic supports a 3:10 distribution ratio with single-circuit operation. This part offers extended frequency performance (200 MHz) and lower supply voltage operation (1.4V ~ 3.465V), with broader input signal type support.

All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can PI49FCT3805CHE or PI49FCT3805DHEX be used as direct replacements for 49FCT805APYG?

A: Both PI49FCT3805CHE and PI49FCT3805DHEX maintain identical package geometry (20-SSOP), input:output ratio (1:5), and circuit count (2). However, the supply voltage range differs: the original operates at 4.75V ~ 5.25V, while the Diodes Incorporated substitutes operate at 3V ~ 3.6V. Direct replacement requires verification that the application circuit can operate within the lower voltage range.

Q: What is the primary difference between PI49FCT3805CHE and PI49FCT3805DHEX?

A: Both parts are functionally equivalent with identical package, ratio, and circuit configuration. The primary difference is maximum frequency specification: PI49FCT3805CHE is rated to 100 MHz, while PI49FCT3805DHEX is rated to 133 MHz. Selection depends on the clock frequency requirements of the application.

Q: Is 8L30210NLGI a suitable substitute for the 49FCT805APYG?

A: The 8L30210NLGI is a functional substitute only when the application can accommodate a different package type (32-VFQFN versus 20-SSOP), different input:output ratio (3:10 versus 1:5), and single-circuit operation (versus dual-circuit). This part is suitable for new designs where PCB layout permits the larger package footprint.

Q: Are all substitute parts RoHS compliant?

A: Yes, all substitute parts listed (PI49FCT3805CHE, PI49FCT3805DHEX, and 8L30210NLGI) are ROHS3 compliant, consistent with the original 49FCT805APYG.

Q: What is the operating temperature range difference between the original and substitute parts?

A: The original 49FCT805APYG operates from 0°C to 70°C. Both Diodes Incorporated substitutes (PI49FCT3805CHE and PI49FCT3805DHEX) and the Renesas 8L30210NLGI operate from -40°C to 85°C, providing extended low-temperature and high-temperature capability.