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TXB0104ZXUR Equivalent & Substitute Parts
Part Overview
The TXB0104ZXUR is a voltage level translator IC manufactured by Texas Instruments, designed for bidirectional signal translation between different voltage domains. This device features 1 circuit with 4 channels, supporting data rates up to 100Mbps with auto-direction sensing capability. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | TXB0104ZXUR |
| Manufacturer | Texas Instruments |
| Translator Type | Voltage Level |
| Channel Type | Bidirectional |
| Number of Circuits | 1 |
| Channels per Circuit | 4 |
| Voltage - VCCA | 1.2 V ~ 3.6 V |
| Voltage - VCCB | 1.65 V ~ 5.5 V |
| Output Type | Tri-State, Non-Inverted |
| Data Rate | 100Mbps |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Features | Auto-Direction Sensing |
| Package / Case | 12-UFBGA |
| Supplier Device Package | 12-BGA Microstar Junior (2.5x2) |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the TXB0104ZXUR is determined by the following critical parameters:
Primary Substitution Criteria:
- Translator Type: Voltage Level
- Channel Type: Bidirectional
- Number of Circuits: 1
- Channels per Circuit: 4
- Output Type: Tri-State, Non-Inverted
- Voltage - VCCA: 1.2 V ~ 3.6 V (minimum requirement)
- Voltage - VCCB: 1.65 V ~ 5.5 V (minimum requirement)
- Operating Temperature: -40°C ~ 85°C (TA)
- RoHS Status: ROHS3 Compliant
Secondary Considerations:
- Data Rate: 100Mbps (TXB0104ZXUR specification; lower rates acceptable for non-performance-critical applications)
- Package compatibility: Different packages available; physical footprint must be verified for PCB layout
- Product Status: Active parts preferred for long-term availability
Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications) and manufacturer-recommended alternatives (functionally equivalent with acceptable parameter variations).
Parameter Comparison
| Part Number | Manufacturer | Translator Type | Channels | VCCA Range | VCCB Range | Data Rate | Temp Range | Package | Status |
|---|---|---|---|---|---|---|---|---|---|
| TXB0104ZXUR | Texas Instruments | Voltage Level | 4 | 1.2V ~ 3.6V | 1.65V ~ 5.5V | 100Mbps | -40°C ~ 85°C | 12-UFBGA | Obsolete |
| TXB0104GXUR | Texas Instruments | Voltage Level | 4 | 1.2V ~ 3.6V | 1.65V ~ 5.5V | 100Mbps | -40°C ~ 85°C | 12-UFBGA | Discontinued |
| ADG3304BCBZ-REEL7 | Analog Devices Inc. | Voltage Level | 4 | 1.15V ~ 5.5V | 1.65V ~ 5.5V | 50Mbps | -40°C ~ 85°C | 12-WLCSP | Active |
| ADG3304BRUZ-REEL7 | Analog Devices Inc. | Voltage Level | 4 | 1.15V ~ 5.5V | 1.65V ~ 5.5V | 50Mbps | -40°C ~ 85°C | 14-TSSOP | Active |
| ADG3304SRUZ-EP-RL7 | Analog Devices Inc. | Voltage Level | 4 | 1.15V ~ 5.5V | 1.65V ~ 5.5V | 50Mbps | -55°C ~ 125°C | 14-TSSOP | Active |
| FXL4T245BQX | onsemi | Translation Transceiver | 4 | 1.1V ~ 3.6V | 1.1V ~ 3.6V | — | -40°C ~ 85°C | 14-DQFN | Active |
| FXL4TD245BQX | onsemi | Voltage Level | 4 | 1.1V ~ 3.6V | 1.1V ~ 3.6V | — | -40°C ~ 85°C | 16-DQFN | Active |
| FXL4TD245UMX | onsemi | Voltage Level | 4 | 1.1V ~ 3.6V | 1.1V ~ 3.6V | — | -40°C ~ 85°C | 16-UMLP | Active |
| FXLA0104QFX-F106 | Fairchild Semiconductor | Voltage Level | 4 | 1.1V ~ 3.6V | 1.1V ~ 3.6V | 140Mbps | -40°C ~ 85°C | 12-UMLP | Active |
| FXMA2104UMX | onsemi | Voltage Level | 4 | 1.65V ~ 5.5V | 1.65V ~ 5.5V | 26MHz | -40°C ~ 85°C | 12-UMLP | Active |
| FXMAR2104UMX | onsemi | Voltage Level | 4 | 1.65V ~ 5.5V | 1.65V ~ 5.5V | 26MHz | -40°C ~ 85°C | 12-UMLP | Active |
Engineering Selection Recommendations
Parametric Equivalent (Preferred for Direct Replacement): TXB0104GXUR is the closest parametric equivalent, matching all electrical specifications of the TXB0104ZXUR. However, this part is discontinued at DiGi Electronics, limiting availability.
Active Alternatives with Full Compliance: The Analog Devices ADG3304 series (BCBZ-REEL7, BRUZ-REEL7, SRUZ-EP-RL7) are active products with ROHS3 compliance and identical circuit configuration. These parts support the required voltage ranges and operating temperature. Data rate is reduced to 50Mbps, which is acceptable for applications not requiring 100Mbps performance.
High-Performance Active Alternative: FXLA0104QFX-F106 (Fairchild Semiconductor) offers 140Mbps data rate with auto-direction sensing and power-off protection. Voltage ranges are 1.1V ~ 3.6V for both VCCA and VCCB, which covers the TXB0104ZXUR requirements. This part is available in high volume.
Extended Temperature Range Option: ADG3304SRUZ-EP-RL7 extends operating temperature to -55°C ~ 125°C, suitable for industrial and automotive applications requiring wider temperature margins.
Package Considerations: Substitutes are available in multiple packages (12-UFBGA, 12-WLCSP, 14-TSSOP, 16-DQFN, 12-UMLP). Package selection depends on PCB layout constraints and assembly capabilities. Verify footprint compatibility before design implementation.
Frequently Asked Questions (FAQ)
Q: Can I use ADG3304BCBZ-REEL7 as a direct replacement for TXB0104ZXUR? A: ADG3304BCBZ-REEL7 is functionally equivalent with identical circuit configuration (1 circuit, 4 channels, bidirectional, tri-state output). The primary difference is reduced data rate (50Mbps vs. 100Mbps). If your application operates below 50Mbps, this part is suitable. Package differs (12-WLCSP vs. 12-UFBGA), requiring PCB layout verification.
Q: What is the difference between FXLA0104QFX-F106 and TXB0104ZXUR? A: Both are 4-channel bidirectional voltage level translators with auto-direction sensing. FXLA0104QFX-F106 offers higher data rate (140Mbps vs. 100Mbps) and includes power-off protection. Voltage ranges differ slightly (1.1V ~ 3.6V for both VCCA and VCCB on FXLA0104 vs. asymmetric ranges on TXB0104). Both support -40°C ~ 85°C operation and are ROHS3 compliant.
Q: Why do some substitutes have lower data rates? A: Data rate is determined by internal circuit design and process technology. Lower data rates do not indicate inferior quality; they reflect design optimization for different applications. Select based on your system bandwidth requirements.
Q: Are all listed substitutes ROHS3 compliant? A: Yes. All active substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.
Q: What is the difference between 12-UFBGA and 12-UMLP packages? A: Both are 12-pin packages with similar pin counts. UFBGA (Ultra Fine Ball Grid Array) uses solder balls; UMLP (Ultra Micro Lead Package) uses lead contacts. Physical dimensions differ (2.5x2mm for UFBGA vs. 1.7x2mm or 1.8x1.8mm for UMLP variants). PCB design and assembly process must accommodate the selected package type.
Q: Can I use FXMA2104UMX or FXMAR2104UMX for high-speed applications? A: These parts operate at 26MHz, significantly lower than TXB0104ZXUR (100Mbps). They are suitable only for low-speed signal translation applications. For applications requiring 100Mbps or higher performance, select FXLA0104QFX-F106 or ADG3304 series with appropriate data rate verification.
Q: What is the advantage of ADG3304SRUZ-EP-RL7 over other ADG3304 variants? A: ADG3304SRUZ-EP-RL7 extends operating temperature range to -55°C ~ 125°C, compared to -40°C ~ 85°C on other variants. This extended range is required for industrial, automotive, and military applications. All other electrical parameters remain identical.
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