PI2EQX4402DNBEX Equivalent & Substitute Parts

Part Overview

The PI2EQX4402DNBEX is a 4-channel PCIe buffer and redriver IC manufactured by Diodes Incorporated, housed in an 84-LFBGA (9x9) package. This device provides signal conditioning with input equalization and output de-emphasis for PCIe applications at 2.5Gbps data rates. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI2EQX4402DNBEX
Manufacturer	Diodes Incorporated
Product Category	Interface - Buffer, ReDriver
Package Type	84-LFBGA (9x9)
Number of Channels	4
Data Rate (Max)	2.5Gbps
Applications	PCIe
Input/Output Type	CML
Signal Conditioning	Input Equalization, Output De-Emphasis
Voltage Supply Range	1.7V ~ 1.9V
Operating Temperature	0°C ~ 70°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution for the PI2EQX4402DNBEX is determined by the following critical parameters:

Channel Count: 4 channels (fixed requirement)
Application Compatibility: PCIe primary application
Signal Type: CML input and output
Signal Conditioning: Input equalization and output de-emphasis capability
Package Compatibility: Surface mount packages with similar form factors
Voltage Supply Range: Must accommodate or exceed the original 1.7V ~ 1.9V range
Data Rate Capability: Minimum 2.5Gbps; higher data rates are acceptable for backward compatibility

The substitute parts listed are Texas Instruments redriver ICs that maintain 4-channel architecture with CML signal conditioning. While some substitutes support higher data rates (6.4Gbps to 12.5Gbps) and broader application support (PCIe, SAS, SATA), they remain functionally compatible for PCIe 2.5Gbps operation. Package differences (48-WQFN, 54-WQFN, 42-WQFN versus 84-LFBGA) require PCB layout redesign but do not affect electrical compatibility.

Parameter Comparison

Parameter	PI2EQX4402DNBEX	DS100BR410SQ/NOPB	DS125BR401SQE/NOPB	DS64BR401SQE/NOPB	SN65LVPE504RUAR
Manufacturer	Diodes Inc.	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Number of Channels	4	4	4	4	4
Data Rate (Max)	2.5Gbps	10.3Gbps	12Gbps	6.4Gbps	5Gbps
Applications	PCIe	SATA	PCIe, SAS, SATA	SAS, SATA	PCIe
Input/Output	CML	CML	CML	CML	CML
Signal Conditioning	Input EQ, Output DE	Input EQ, Output DE	Input EQ, Output DE	Input EQ, Output DE	Input EQ, Output DE
Package Type	84-LFBGA (9x9)	48-WQFN (7x7)	54-WQFN (10x5.5)	54-WQFN (10x5.5)	42-WQFN (4.6x9)
Voltage Supply	1.7V ~ 1.9V	2.375V ~ 2.625V	2.375V ~ 3.6V	2.375V ~ 2.625V	3V ~ 3.6V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-10°C ~ 85°C	-40°C ~ 85°C
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)	2 (1 Year)	2 (1 Year)	2 (1 Year)

Engineering Selection Recommendations

DS125BR401SQE/NOPB is the primary substitute for PCIe applications. This part maintains 4-channel architecture with CML signal conditioning and supports PCIe operation at 12Gbps, providing significant performance headroom above the original 2.5Gbps specification. The device is in active production status with ROHS3 compliance and improved MSL rating (2 versus 3). Voltage supply range extends to 3.6V, accommodating broader power supply designs. Operating temperature range (-40°C to 85°C) exceeds the original specification.

SN65LVPE504RUAR is suitable for PCIe-specific designs requiring lower pin count and smaller footprint. This 42-WQFN package offers 5Gbps data rate capability with 4-channel configuration. Supply voltage range (3V ~ 3.6V) and active product status support long-term availability.

DS64BR401SQE/NOPB and DS100BR410SQ/NOPB are secondary options for designs that can accommodate multi-protocol support (SAS, SATA). Both maintain 4-channel architecture and CML signal conditioning with active product status and ROHS3 compliance.

All substitute parts are in active production, ensuring supply chain continuity and long-term availability compared to the obsolete PI2EQX4402DNBEX.

Frequently Asked Questions (FAQ)

Q: Can DS125BR401SQE/NOPB directly replace PI2EQX4402DNBEX without PCB modification?

A: Electrical substitution is valid; however, package differences (54-WQFN versus 84-LFBGA) require PCB layout redesign. Pin assignments differ between packages, necessitating schematic and layout updates.

Q: What is the primary difference between DS100BR410SQ/NOPB and DS125BR401SQE/NOPB?

A: DS100BR410SQ/NOPB is optimized for SATA applications with 10.3Gbps data rate in a 48-WQFN package. DS125BR401SQE/NOPB supports PCIe, SAS, and SATA with 12Gbps capability in a 54-WQFN package, offering broader application flexibility.

Q: Are voltage supply differences between PI2EQX4402DNBEX (1.7V ~ 1.9V) and substitute parts critical?

A: The original part operates at lower voltage levels. Substitute parts require higher supply voltages (2.375V minimum). Power supply redesign may be necessary. Verify that system power architecture can accommodate the substitute part's voltage requirements.

Q: Does higher data rate capability of substitute parts affect PCIe 2.5Gbps operation?

A: No. Substitute parts with higher data rate ratings (6.4Gbps, 10.3Gbps, 12Gbps) operate correctly at lower speeds. The higher rating provides performance margin and future design flexibility.

Q: What is the impact of MSL rating differences?

A: PI2EQX4402DNBEX has MSL 3 (168 hours); substitute parts have MSL 2 (1 year). MSL 2 provides extended moisture protection, reducing risk during storage and assembly processes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the original part's environmental certification status.

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