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TXB0108YZPR2 Equivalent & Substitute Parts
Part Overview
The TXB0108YZPR2 is a voltage level translator manufactured by Texas Instruments, designed for bidirectional signal translation between different voltage domains. This IC translator operates with VCCA ranging from 1.2V to 3.6V and VCCB from 1.65V to 5.5V, supporting 8 channels at 100Mbps data rate in a 20-DSBGA package. The device is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1). Substitute parts are necessary when the 20-DSBGA package is unavailable, when alternative voltage specifications are required, or when different operating temperature ranges are needed for specific applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Translator Type | Voltage Level |
| Channel Type | Bidirectional |
| Number of Circuits | 1 |
| Channels per Circuit | 8 |
| 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 (TA) |
| Package / Case | 20-XFBGA, DSBGA |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the TXB0108YZPR2 is determined by the following critical parameters:
Primary Substitution Criteria:
- Bidirectional channel configuration with 8 channels per circuit
- Voltage level translation capability between specified VCCA and VCCB ranges
- Tri-state output configuration
- Surface mount packaging compatibility with board layout requirements
- Operating temperature range support (-40°C minimum to 85°C or higher)
- RoHS3 compliance and MSL 1 rating
Package Considerations: The TXB0108YZPR2 uses a 20-DSBGA package. Substitute parts may employ alternative packages including 24-TSSOP, 24-DHVQFN, or 24-QSOP, which require PCB layout modifications but maintain functional equivalence when electrical parameters align.
Voltage Domain Flexibility: Substitute parts with overlapping or extended voltage ranges (such as 0.8V ~ 3.6V or 1.2V ~ 5.5V) are acceptable when the application voltage requirements fall within both the original and substitute specifications.
Parameter Comparison
| Part Number | Manufacturer | Channels | VCCA Range | VCCB Range | Output Type | Package | Temp Range | Status |
|---|---|---|---|---|---|---|---|---|
| TXB0108YZPR2 | Texas Instruments | 8 | 1.2V ~ 3.6V | 1.65V ~ 5.5V | Tri-State, Non-Inverted | 20-DSBGA | -40°C ~ 85°C | Active |
| 74AVC8T245BQ,118 | Nexperia USA Inc. | 8 | 0.8V ~ 3.6V | 0.8V ~ 3.6V | 3-State | 24-DHVQFN | -40°C ~ 125°C | Active |
| 74AVC8T245PW,118 | Nexperia USA Inc. | 8 | 0.8V ~ 3.6V | 0.8V ~ 3.6V | 3-State | 24-TSSOP | -40°C ~ 125°C | Active |
| 74AVC8T245PW-Q100J | Nexperia USA Inc. | 8 | 0.8V ~ 3.6V | 0.8V ~ 3.6V | 3-State | 24-TSSOP | -40°C ~ 125°C | Active |
| 74AVC8T245PW:112 | Nexperia USA Inc. | 8 | 0.8V ~ 3.6V | 0.8V ~ 3.6V | 3-State | 24-TSSOP | -40°C ~ 125°C | Obsolete |
| 74LVC4245APW-Q100J | Nexperia USA Inc. | 8 | 1.5V ~ 5.5V | 1.5V ~ 3.6V | Tri-State | 24-TSSOP | -40°C ~ 125°C | Active |
| 74LVC8T245PW,118 | Nexperia USA Inc. | 8 | 1.2V ~ 5.5V | 1.2V ~ 5.5V | 3-State | 24-TSSOP | -40°C ~ 125°C | Active |
| 74LVCH8T245BQ,118 | Nexperia USA Inc. | 8 | 1.2V ~ 5.5V | 1.2V ~ 5.5V | 3-State | 24-DHVQFN | -40°C ~ 125°C | Active |
| 74LVCH8T245PW,118 | Nexperia USA Inc. | 8 | 1.2V ~ 5.5V | 1.2V ~ 5.5V | 3-State | 24-TSSOP | -40°C ~ 125°C | Active |
| 74LVCH8T245PW-Q10J | Nexperia USA Inc. | 8 | 1.2V ~ 5.5V | 1.2V ~ 5.5V | 3-State | 24-TSSOP | -40°C ~ 125°C | Active |
| 74LVX3245QSCX | Fairchild Semiconductor | 8 | 2.7V ~ 3.6V | 4.5V ~ 5.5V | Tri-State, Non-Inverted | 24-QSOP | -40°C ~ 85°C | Active |
Engineering Selection Recommendations
Active Production Parts (Preferred): The 74LVCH8T245PW-Q10J and 74LVCH8T245PW,118 are recommended as primary substitutes. Both maintain 8-channel bidirectional translation with extended voltage range (1.2V ~ 5.5V), active production status, RoHS3 compliance, and MSL 1 rating. The -Q10J variant includes AEC-Q100 automotive qualification, suitable for automotive and industrial applications. The 24-TSSOP package requires PCB layout modification from the original 20-DSBGA but provides superior availability and cost efficiency.
Voltage-Matched Alternatives: The 74LVC4245APW-Q100J provides asymmetric voltage translation (VCCA 1.5V ~ 5.5V, VCCB 1.5V ~ 3.6V) with AEC-Q100 qualification and active status. This part is suitable when the application requires higher VCCA voltage tolerance. The 74AVC8T245PW-Q100J offers symmetric voltage range (0.8V ~ 3.6V) with automotive qualification and active production status.
Avoid Obsolete Parts: The 74AVC8T245PW:112 is marked obsolete and should not be selected for new designs despite functional equivalence.
Temperature Range Consideration: All substitute parts support -40°C ~ 125°C operating temperature, exceeding the TXB0108YZPR2 specification of -40°C ~ 85°C. This extended range provides additional design margin for thermal management.
Frequently Asked Questions (FAQ)
Q: Can I substitute the TXB0108YZPR2 with a 24-pin package part on a board designed for 20-DSBGA?
A: No. The 20-DSBGA and 24-pin packages (TSSOP, DHVQFN, QSOP) have different pinouts and footprints. PCB layout modification is required. Verify pin assignments and signal routing before substitution.
Q: What is the difference between 74AVC and 74LVCH series translators?
A: The 74AVC series operates at 0.8V ~ 3.6V symmetric voltage range with lower output current (12mA). The 74LVCH series operates at 1.2V ~ 5.5V symmetric voltage range with higher output current (32mA). Select based on application voltage requirements and drive capability needs.
Q: Is the 74LVX3245QSCX compatible with the TXB0108YZPR2?
A: The 74LVX3245QSCX provides asymmetric voltage translation (VCCA 2.7V ~ 3.6V, VCCB 4.5V ~ 5.5V) with tri-state non-inverted output, matching the original part's output configuration. However, its voltage range is narrower and does not support the full 1.2V minimum VCCA specification. Use only if application voltages fall within 2.7V ~ 3.6V and 4.5V ~ 5.5V ranges.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts carry RoHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, matching the original TXB0108YZPR2 environmental specifications.
Q: Which substitute part has the best availability?
A: The 74LVC4245APW-Q100J shows the highest inventory (26,405 pcs) among active production parts. The 74LVCH8T245PW,118 and 74LVCH8T245PW-Q10J also maintain substantial stock levels (14,721 and 6,398 pcs respectively).
Q: Can I use a substitute part with a higher operating temperature range?
A: Yes. All substitute parts support -40°C ~ 125°C, which exceeds the TXB0108YZPR2 specification of -40°C ~ 85°C. Extended temperature range provides additional design margin and is functionally compatible.
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