49FCT805APYGI Equivalent & Substitute Parts

Part Overview

The 49FCT805APYGI is a Clock Fanout Buffer (Distribution) IC manufactured by Renesas Electronics Corporation, designed for 1:5 clock distribution in 20-SSOP surface mount packaging. This part operates with CMOS and LVTTL input/output compatibility and a supply voltage range of 4.75V to 5.25V. The device is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

49FCT805APYGI

Renesas Electronics CorporationIn Stock: 108849FCT805APYGI 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 49FCT805APYGI is determined by the following critical parameters: 1:5 input-to-output ratio, fanout buffer functionality, 20-SSOP package compatibility, surface mount mounting type, CMOS/LVTTL input and output support, and -40°C to 85°C operating temperature range. The substitute parts are grouped into two categories based on package and performance characteristics:

Category 1 - Direct Package Match (20-SSOP): PI49FCT3805CHE and PI49FCT3805DHEX maintain identical 20-SSOP packaging, 1:5 ratio, 2-circuit configuration, and operating temperature range. Both are active products from Diodes Incorporated within the 49FCT series.

Category 2 - Functional Alternative (Different Package): 8L30210NLGI provides equivalent clock distribution functionality with a 3:10 ratio and 32-VFQFN package, suitable for applications where package footprint flexibility is acceptable and higher frequency operation (200 MHz) is beneficial.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Package, Same Ratio):

PI49FCT3805CHE and PI49FCT3805DHEX are active products suitable for direct substitution in applications currently using the 49FCT805APYGI. Both maintain the 20-SSOP package footprint and 1:5 distribution ratio. PI49FCT3805DHEX offers higher maximum frequency (133 MHz) compared to PI49FCT3805CHE (100 MHz), providing greater performance headroom. Both devices are ROHS3 compliant and operate across the -40°C to 85°C temperature range. Note that supply voltage differs: the Diodes Incorporated parts operate at 3V to 3.6V, whereas the original Renesas part operates at 4.75V to 5.25V. Circuit design modifications may be required to accommodate this voltage difference.

For Functional Alternative (Different Package, Different Ratio):

The 8L30210NLGI from Renesas Electronics provides clock distribution functionality with a 3:10 ratio in a 32-VFQFN package. This part is suitable when PCB layout flexibility permits package change and higher frequency operation (200 MHz) is advantageous. The lower supply voltage range (1.4V to 3.465V) and expanded input compatibility (HCSL, LVCMOS, LVDS, LVPECL, LVTTL, Crystal) offer design flexibility for modern low-power applications. The single-circuit configuration differs from the dual-circuit design of the original part.

All substitute options are active products with current manufacturing support and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can PI49FCT3805CHE and PI49FCT3805DHEX be used interchangeably with the 49FCT805APYGI?

A: Both parts maintain the same 20-SSOP package, 1:5 input-to-output ratio, dual-circuit configuration, and -40°C to 85°C operating temperature range. However, the supply voltage differs: the original part requires 4.75V to 5.25V, while the Diodes Incorporated substitutes operate at 3V to 3.6V. Circuit design modifications are necessary to accommodate this voltage difference. PI49FCT3805DHEX provides higher maximum frequency (133 MHz) than PI49FCT3805CHE (100 MHz).

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

A: Both parts are functionally equivalent with identical packaging and ratio specifications. The primary difference is maximum frequency: PI49FCT3805CHE supports 100 MHz, while PI49FCT3805DHEX supports 133 MHz. Selection depends on the frequency requirements of the application.

Q: Is the 8L30210NLGI a suitable replacement for the 49FCT805APYGI?

A: The 8L30210NLGI provides clock distribution functionality but differs in several key parameters: it uses a 3:10 ratio instead of 1:5, features a single circuit instead of dual circuits, and employs a 32-VFQFN package instead of 20-SSOP. This part is suitable only when the application can accommodate these differences and when the higher frequency capability (200 MHz) and expanded input compatibility are beneficial.

Q: What are the package compatibility considerations?

A: The 49FCT805APYGI uses a 20-SSOP (0.209", 5.30mm Width) package. PI49FCT3805CHE and PI49FCT3805DHEX maintain this identical package, allowing direct PCB footprint compatibility. The 8L30210NLGI uses a 32-VFQFN Exposed Pad package, requiring PCB layout redesign if selected.

Q: Are all substitute parts RoHS compliant?

A: Yes, all substitute parts listed (PI49FCT3805CHE, PI49FCT3805DHEX, and 8L30210NLGI) are ROHS3 compliant, matching the compliance status of the original 49FCT805APYGI.

Q: What supply voltage considerations apply when substituting these parts?

A: The original 49FCT805APYGI operates at 4.75V to 5.25V. PI49FCT3805CHE and PI49FCT3805DHEX require 3V to 3.6V, necessitating power supply circuit modifications. The 8L30210NLGI operates at 1.4V to 3.465V, offering the widest voltage range but requiring the most significant circuit redesign.