PI3EQX12908AZFE Equivalent & Substitute Parts

Part Overview

The PI3EQX12908AZFE is an 8-channel buffer/redriver IC manufactured by Diodes Incorporated, designed for PCIe applications with 12Gbps data rate capability. This part operates at 3.3V supply voltage and features input equalization and output de-emphasis signal conditioning in a 54-TQFN package. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI3EQX12908AZFE
Manufacturer	Diodes Incorporated
Product Type	Buffer, ReDriver
Number of Channels	8
Data Rate (Max)	12Gbps
Input/Output Type	CML
Signal Conditioning	Input Equalization, Output De-Emphasis
Voltage - Supply	3.3V
Operating Temperature	-40°C ~ 85°C
Package / Case	54-WFQFN Exposed Pad (10x5.5)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PI3EQX12908AZFE is determined by the following critical parameters:

Primary Substitution Criteria:

8-channel buffer/redriver architecture
CML input and output signaling
54-WFQFN (10x5.5) package with exposed pad
Input equalization and output de-emphasis capability
Surface mount configuration
Operating temperature range -40°C ~ 85°C
ROHS3 compliance

Acceptable Variations:

Data rate: Minimum 10.3Gbps (PI3EQX12908AZFE operates at 12Gbps; lower-rated parts remain compatible for PCIe applications)
Supply voltage: 2.375V ~ 3.6V range (accommodates 3.3V operation)
Delay time: 80ps to 200ps (functional parameter, not a limiting factor for substitution)
Packaging format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® (logistics variation only)

Substitute Parts Identified:

Texas Instruments DS100KR series (10.3Gbps rated):

DS100KR401SQ/NOPB
DS100KR401SQE/NOPB
DS100KR800SQ/NOPB
DS100KR800SQE/NOPB

Texas Instruments DS125BR series (12.5Gbps rated):

DS125BR800ANJYR
DS125BR800ANJYT
DS125BR800SQ/NOPB
DS125BR800SQE/NOPB
DS125BR820NJYR
DS125BR820NJYT

Parameter Comparison

Parameter	PI3EQX12908AZFE	DS100KR401SQ/NOPB	DS100KR401SQE/NOPB	DS100KR800SQ/NOPB	DS100KR800SQE/NOPB	DS125BR800ANJYR	DS125BR800ANJYT	DS125BR800SQ/NOPB	DS125BR800SQE/NOPB	DS125BR820NJYR	DS125BR820NJYT
Manufacturer	Diodes Inc.	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Number of Channels	8	8	8	8	8	8	8	8	8	8	8
Data Rate (Max)	12Gbps	10.3Gbps	10.3Gbps	10.3Gbps	10.3Gbps	12.5Gbps	12.5Gbps	12.5Gbps	12.5Gbps	12.5Gbps	12.5Gbps
Input/Output Type	CML	CML	CML	CML	CML	CML	CML	CML	CML	CML	CML
Signal Conditioning	Input Equalization, Output De-Emphasis	Input Equalization, Output De-Emphasis	Input Equalization, Output De-Emphasis	Input Equalization, Output De-Emphasis	Input Equalization, Output De-Emphasis	Input Equalization, Output De-Emphasis	Input Equalization, Output De-Emphasis	Input Equalization, Output De-Emphasis	Input Equalization, Output De-Emphasis	Input Equalization, Output De-Emphasis	Input Equalization, Output De-Emphasis
Voltage - Supply	3.3V	2.375V ~ 3.6V	2.375V ~ 3.6V	2.375V ~ 3.6V	2.375V ~ 3.6V	2.375V ~ 3.6V	2.375V ~ 3.6V	2.375V ~ 3.6V	2.375V ~ 3.6V	2.5V ~ 3.3V	2.5V ~ 3.3V
Delay Time	—	200ps	200ps	200ps	200ps	200ps	200ps	200ps	200ps	80ps	80ps
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	54-WFQFN Exposed Pad	54-WFQFN Exposed Pad	54-WFQFN Exposed Pad	54-WFQFN Exposed Pad	54-WFQFN Exposed Pad	54-WFQFN Exposed Pad	54-WFQFN Exposed Pad	54-WFQFN Exposed Pad	54-WFQFN Exposed Pad	54-WFQFN Exposed Pad	54-WFQFN Exposed Pad
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)

Engineering Selection Recommendations

All identified substitute parts are active products with ROHS3 compliance, ensuring regulatory alignment with current manufacturing standards. The PI3EQX12908AZFE obsolescence status necessitates transition to one of the active alternatives.

Texas Instruments DS100KR Series (10.3Gbps): These parts provide direct functional equivalence with lower data rate specification. Suitable for PCIe Gen 2 applications and legacy systems where 10.3Gbps performance meets bandwidth requirements. Available in both Tape & Reel and Cut Tape packaging formats.

Texas Instruments DS125BR800 Series (12.5Gbps): These parts exceed the original 12Gbps specification, providing performance margin for PCIe Gen 3 and SAS applications. DS125BR800ANJYR and DS125BR800ANJYT variants support PCIe, SAS, and SATA protocols. Available in Tape & Reel packaging.

Texas Instruments DS125BR820 Series (12.5Gbps): These parts offer the lowest propagation delay (80ps versus 200ps in DS100KR and DS125BR800 variants), with supply voltage range 2.5V ~ 3.3V and 220mA supply current specification. Support PCIe, SAS, and SATA applications. Available in Cut Tape and Tape & Reel formats.

All substitute parts maintain identical 54-WFQFN package geometry, operating temperature range, and CML signal conditioning architecture, enabling direct PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can DS100KR401 series parts replace PI3EQX12908AZFE in existing designs?

A: Yes. The DS100KR401 series maintains identical package, channel count, signal conditioning, and operating temperature specifications. The 10.3Gbps data rate is lower than the original 12Gbps specification but remains compatible with PCIe applications. Verify system bandwidth requirements before selection.

Q: What is the difference between DS100KR and DS125BR series?

A: The DS125BR series supports higher data rates (12.5Gbps versus 10.3Gbps) and broader application support (PCIe, SAS, SATA versus unspecified). Both maintain identical package and channel architecture. DS125BR selection provides performance margin for high-speed serial applications.

Q: Are packaging format differences (Tape & Reel vs. Cut Tape) functionally significant?

A: No. Packaging format differences (TR, CT & Digi-Reel) represent logistics and handling variations only. Electrical and mechanical specifications remain identical. Selection depends on assembly process requirements and volume.

Q: Why do substitute parts specify 2.375V ~ 3.6V supply range while PI3EQX12908AZFE specifies 3.3V fixed?

A: The substitute parts feature wider supply voltage tolerance, accommodating 3.3V operation within their specified range. This provides design flexibility for systems with variable supply conditions while maintaining compatibility with fixed 3.3V supplies.

Q: What is the significance of Moisture Sensitivity Level differences?

A: PI3EQX12908AZFE carries MSL 1 (unlimited shelf life), while substitutes carry MSL 2 (1-year shelf life). MSL 2 components require controlled storage conditions and have defined reflow windows. Verify storage and assembly procedures align with MSL 2 requirements.

Q: Can DS125BR820 parts be used where DS125BR800 is specified?

A: Yes. DS125BR820 variants provide identical functionality with lower propagation delay (80ps versus 200ps). The narrower supply voltage range (2.5V ~ 3.3V) must be verified against system supply specifications. Higher current draw (220mA) requires power budget confirmation.

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