TXB0104D Voltage Level Translator - Equivalent & Substitute Parts

Part Overview

The TXB0104D is a bidirectional voltage level translator manufactured by Texas Instruments, designed for translating logic signals between different voltage domains. This device operates with VCCA ranging from 1.2V to 3.6V and VCCB from 1.65V to 5.5V, supporting data rates up to 100Mbps across 4 channels in a single circuit. The part is currently in active production status with 1350 units in stock.

Substitute parts become necessary when the TXB0104D reaches end-of-life, when specific packaging requirements differ from application constraints, or when alternative voltage specifications better match system requirements. The following equivalent devices maintain core functionality while offering variations in voltage ranges, package types, data rates, and operating temperature specifications.

Key Parameters

Parameter	TXB0104D Specification
Translator Type	Voltage Level
Channel Type	Bidirectional
Number of Circuits	1
Channels per Circuit	4
Voltage - VCCA	1.2V ~ 3.6V
Voltage - VCCB	1.65V ~ 5.5V
Output Type	Tri-State, Non-Inverted
Data Rate	100Mbps
Operating Temperature	-40°C ~ 85°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the TXB0104D is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Translator Type: Voltage Level (bidirectional operation required)
Channel Type: Bidirectional
Channels per Circuit: 4 channels minimum
Output Type: Tri-State capability required
Voltage overlap: VCCA and VCCB ranges must accommodate 1.2V ~ 3.6V and 1.65V ~ 5.5V respectively

Acceptable Variation Parameters:

Data Rate: 100Mbps or higher acceptable; lower rates acceptable if application permits
Operating Temperature: Extended ranges acceptable; minimum -40°C ~ 85°C required
Package Type: Alternative packages acceptable if PCB layout permits
Mounting Type: Surface mount required

Substitute parts are grouped into three categories based on package compatibility and voltage specification alignment:

Group 1 - Direct SOIC Package Substitutes: Parts maintaining 14-SOIC packaging with compatible voltage specifications (NLSX5014DR2G)

Group 2 - Alternative Package Substitutes with Extended Voltage Range: Parts offering wider voltage specifications in different packages (ADG3304SRUZ-EP-RL7, MAX3023EUD+)

Group 3 - Compact Package Alternatives: Miniaturized packages (DQFN, UMLP, TDFN) for space-constrained applications (FXL4TD245BQX, FXLA0104QFX-F106, MAX14611ETD+T)

Parameter Comparison

Part Number	Manufacturer	Translator Type	Channels	VCCA Range	VCCB Range	Output Type	Data Rate	Temp Range	Package	Status
TXB0104D	Texas Instruments	Voltage Level	4	1.2V ~ 3.6V	1.65V ~ 5.5V	Tri-State, Non-Inverted	100Mbps	-40°C ~ 85°C	14-SOIC	Active
NLSX5014DR2G	onsemi	Voltage Level	4	0.9V ~ 4.5V	0.9V ~ 4.5V	Tri-State, Non-Inverted	100Mbps	-55°C ~ 125°C	14-SOIC	Obsolete
ADG3304SRUZ-EP-RL7	Analog Devices Inc.	Voltage Level	4	1.15V ~ 5.5V	1.65V ~ 5.5V	Tri-State, Non-Inverted	50Mbps	-55°C ~ 125°C	14-TSSOP	Active
MAX3023EUD+	Analog Devices Inc./Maxim Integrated	Voltage Level	4	1.2V ~ 3.6V	1.65V ~ 3.6V	Tri-State, Non-Inverted	100Mbps	-40°C ~ 85°C	14-TSSOP	Active
FXL4TD245BQX	onsemi	Voltage Level	4	1.1V ~ 3.6V	1.1V ~ 3.6V	Tri-State, Non-Inverted	Not specified	-40°C ~ 85°C	16-DQFN	Active
FXLA0104QFX-F106	Fairchild Semiconductor	Voltage Level	4	1.1V ~ 3.6V	1.1V ~ 3.6V	Tri-State, Non-Inverted	140Mbps	-40°C ~ 85°C	12-UMLP	Active
FXLA104UMX	Fairchild Semiconductor	Voltage Level	4	1.1V ~ 3.6V	1.1V ~ 3.6V	Tri-State, Non-Inverted	140Mbps	-40°C ~ 85°C	16-UFQFN	Active
MAX14611ETD+T	Analog Devices Inc./Maxim Integrated	Voltage Level	4	0.9V ~ 5.5V	1.65V ~ 5.5V	Open Drain, Push-Pull, Tri-State	20Mbps	-40°C ~ 85°C	14-TDFN	Active

Engineering Selection Recommendations

Primary Substitute - Same Package Class: MAX3023EUD+ is the preferred substitute when 14-SOIC package compatibility is not required but TSSOP footprint is acceptable. This part maintains identical voltage specifications (VCCA 1.2V ~ 3.6V, VCCB 1.65V ~ 3.6V), 100Mbps data rate, and operating temperature range (-40°C ~ 85°C) as the TXB0104D. Both devices are in active production status with ROHS3 compliance and unlimited moisture sensitivity rating.

Extended Temperature Range Alternative: ADG3304SRUZ-EP-RL7 provides extended operating temperature range (-55°C ~ 125°C) and wider VCCA specification (1.15V ~ 5.5V) for applications requiring enhanced thermal performance. Data rate is reduced to 50Mbps, suitable for non-critical timing applications. Package is 14-TSSOP. Active production status with full compliance certifications.

High-Speed Compact Package Options: FXLA0104QFX-F106 and FXLA104UMX offer superior data rate performance (140Mbps) in miniaturized packages (12-UMLP and 16-UFQFN respectively), with identical voltage specifications (1.1V ~ 3.6V for both VCCA and VCCB). Both include auto-direction sensing and power-off protection features. Active production status.

Obsolete Part Consideration: NLSX5014DR2G maintains 14-SOIC packaging and 100Mbps performance but is marked obsolete. This part offers wider voltage specifications (0.9V ~ 4.5V for both VCCA and VCCB) and extended temperature range (-55°C ~ 125°C). Use only when inventory availability is critical and design timeline permits obsolete component qualification.

Lower Data Rate Application: MAX14611ETD+T supports 20Mbps operation with widest voltage specification range (VCCA 0.9V ~ 5.5V, VCCB 1.65V ~ 5.5V) and includes thermal-shutdown protection. Suitable for low-speed communication interfaces where power supply decoupling and thermal management are design priorities.

Frequently Asked Questions (FAQ)

Q: Can NLSX5014DR2G replace TXB0104D in new designs? A: NLSX5014DR2G is marked obsolete and should not be selected for new production designs. While it maintains 14-SOIC packaging and 100Mbps performance, active production alternatives (MAX3023EUD+, ADG3304SRUZ-EP-RL7) are preferred for long-term supply assurance.

Q: What is the primary difference between TXB0104D and MAX3023EUD+? A: Both devices share identical VCCA (1.2V ~ 3.6V), VCCB (1.65V ~ 3.6V), 100Mbps data rate, and operating temperature specifications. The primary difference is package type: TXB0104D uses 14-SOIC while MAX3023EUD+ uses 14-TSSOP. Electrical performance is equivalent for applications within these voltage and speed parameters.

Q: Are FXLA0104QFX-F106 and FXLA104UMX interchangeable? A: Both parts share identical electrical specifications (1.1V ~ 3.6V for VCCA and VCCB, 140Mbps data rate, auto-direction sensing, power-off protection). The difference is package size: FXLA0104QFX-F106 uses 12-UMLP (1.7x2mm) while FXLA104UMX uses 16-UFQFN (1.8x2.6mm). Selection depends on PCB layout constraints and pin count requirements.

Q: Can I use ADG3304SRUZ-EP-RL7 in applications requiring 100Mbps? A: ADG3304SRUZ-EP-RL7 is rated for 50Mbps maximum data rate, which is half the TXB0104D specification. Use this part only in applications where 50Mbps performance is sufficient. For 100Mbps requirements, select MAX3023EUD+, FXLA0104QFX-F106, or FXLA104UMX.

Q: What voltage specifications must I verify before substitution? A: Verify that your system's VCCA voltage (typically 1.2V ~ 3.6V) and VCCB voltage (typically 1.65V ~ 5.5V) fall within the substitute part's specified ranges. All listed substitutes accommodate the TXB0104D voltage envelope, but some offer extended ranges. Confirm your actual supply voltages match the selected part's minimum and maximum ratings.

Q: Are all substitute parts ROHS3 compliant? A: All listed substitute parts are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1), matching the TXB0104D compliance profile. Verify compliance documentation for your specific procurement source.

Q: Which substitute offers the smallest footprint? A: FXLA0104QFX-F106 provides the smallest footprint at 12-UMLP (1.7x2mm). This part maintains 140Mbps performance and identical voltage specifications to FXLA104UMX but in a more compact package suitable for space-constrained PCB layouts.

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