TXB0104RUTR - 4-Bit Bidirectional Level Shifter | TI
MPN: TXB0104RUTR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.62 | $0.62 |
| 10 | $0.56 | $5.60 |
| 100 | $0.42 | $42.00 |
| 500 | $0.32 | $160.00 |
| 1,000 | $0.24 | $240.00 |
Drop-in alternatives for TXB0104RUTR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TXS0104ERUTR
β Drop-Inπ Reference alternative (not in catalog)
NTS0104GU12
β Drop-Inπ Reference alternative (not in catalog)
TXB0104RUTR Maximum Ratings & Electrical Characteristics
| Function | 4-bit bidirectional voltage-level translator |
| Direction Control | Automatic direction sensing |
| A Port Supply (VCCA) | 1.2 V to 3.6 V |
| B Port Supply (VCCB) | 1.65 V to 5.5 V |
| Supply Constraint | VCCA must be less than or equal to VCCB |
| Max Data Rate | 100 Mbps |
| Channels | 4 |
| ESD Protection | Β±15 kV (HBM) |
| Output Enable | Yes (OE pin, tri-state outputs) |
| Architecture | One-shot edge accelerator |
| Operating Temperature | -40C to +85C |
| Package | UQFN-12 (RUT), 1.7 mm x 2 mm |
| Mounting Type | Surface Mount |
| Application Note | Not recommended for open-drain buses (I2C, 1-Wire) |
| Hot Insertion / Partial Power-Down | Supported via OE pin |
| RoHS Status | Compliant |
TXB0104RUTR Pin Configuration
| Pin 1 | VCCA β A-port supply, 1.2 V to 3.6 V |
| Pin 2 | A1 β A-port data channel 1 |
| Pin 3 | A2 β A-port data channel 2 |
| Pin 4 | A3 β A-port data channel 3 |
| Pin 5 | A4 β A-port data channel 4 |
| Pin 6 | GND β Ground |
| Pin 7 | B4 β B-port data channel 4 |
| Pin 8 | B3 β B-port data channel 3 |
| Pin 9 | B2 β B-port data channel 2 |
| Pin 10 | B1 β B-port data channel 1 |
| Pin 11 | OE β Output enable, tri-state when low |
| Pin 12 | VCCB β B-port supply, 1.65 V to 5.5 V |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TXB0104RUTR is suitable for 6 applications: SPI Level Shifting, SD Card Interfaces, SIM Card and Mobile Peripherals, Mixed-Voltage MCU GPIO Expansion, UART Communication Between Different Voltage Domains, Partial Power-Down and Hot Insertion Protection.
SPI Level Shifting
The TXB0104RUTR fits SPI clock/data translation between a 3.3 V or 1.8 V MCU and 5 V peripherals because its push-pull auto-direction one-shot drivers sustain 100 Mbps, well above typical SPI rates of 10-50 MHz. MOSI, SCLK, and CS on the A port translate to the B port without direction pins. Place the device close to the MCU and keep traces short; the one-shot edge accelerator adds about 5 ns of propagation delay, negligible for SPI timing budgets.
Recommended
SD Card Interfaces
SD/SDIO cards in 1.8 V signaling modes need translation to and from 3.3 V host controllers. The TXB0104RUTR supports the required bidirectional CMD/DATA lines at speeds up to 100 Mbps, matching high-speed SD clock operation. The auto-direction feature handles the bidirectional CMD line without firmware control, and the OE pin enables power sequencing so the card socket can be fully isolated during hot insertion, protecting both host and card.
Recommended
SIM Card and Mobile Peripherals
SIM card interfaces commonly run at 1.8 V while baseband controllers operate at higher voltages. The TXB0104RUTR translates the SIM clock, reset, and bidirectional data lines between rails from 1.2 V to 5.5 V. Its Β±15-kV ESD rating adds robustness against card insertion events, and the 1.7 mm x 2 mm UQFN-12 footprint fits dense mobile PCBs. The OE pin supports the card power-up sequence required by ISO-style SIM signaling.
Recommended
Mixed-Voltage MCU GPIO Expansion
When a 1.8 V or 3.3 V MCU must drive 5 V logic inputs (relays, optocouplers, legacy TTL peripherals), the TXB0104RUTR provides four channels of automatic translation. Per TI datasheet, the A port accepts 1.2 V to 3.6 V and the B port 1.65 V to 5.5 V, giving headroom for 5 V signaling. Designers should confirm each GPIO is push-pull, since the TXB architecture is unsuitable for open-drain or heavily loaded capacitive buses.
Recommended
UART Communication Between Different Voltage Domains
UART TX and RX lines are ideal TXB0104RUTR signals: unidirectional per line, push-pull driven, and typically at 115.2 kbps to a few Mbps, far below the 100 Mbps rating. Assign TX from the low-voltage side and RX from the high-voltage side to the four channels as needed; automatic direction sensing removes the need for a DIR pin. Add the OE control to isolate the UART during bootloader flashing sequences when the peer device may be unpowered.
Recommended
Partial Power-Down and Hot Insertion Protection
Systems with hot-swappable cards or modules need I/O that does not back-drive unpowered rails. The TXB0104RUTR supports partial power-down operation: with OE low or one supply absent, the I/Os go to tri-state and leakage into the unpowered domain stays minimal, per TI datasheet. This makes it suitable for backplane and docking connectors where one board may be inserted while the other is off, protecting sensitive low-voltage silicon from overvoltage stress.
Recommended
Recommended Products Summary
Engineering reference data for TXB0104RUTR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TXS0104ERUTR | NTS0104GU12 | TXS0104EPWR |
|---|---|---|---|---|
| Package | UQFN-12 (RUT) 1.7x2 mm | UQFN-12 (RUT) - same | XSON-12 1.7x2 mm - same footprint | TSSOP-14 - different |
| Brand | Texas Instruments | Texas Instruments | NXP Semiconductors | Texas Instruments |
| Bit Width | 4 | 4 | 4 | 4 |
| Max Data Rate | 100 Mbps | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| A Port Range | 1.2 V to 3.6 V | 1.65 V to 3.6 V | [DATA_NEEDED] | 1.65 V to 3.6 V |
| Open-Drain Support (I2C) | No | Yes (10-kOhm pull-ups) | Yes | Yes (10-kOhm pull-ups) |
| ESD Rating | Β±15 kV HBM | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Direction Control | Automatic | Automatic | Automatic | Automatic |
Key Differentiators
- 100 Mbps push-pull throughput with auto direction (vs TXS0104ERUTR)
- Β±15-kV HBM ESD protection on all pins (vs NTS0104GU12)
- 1.2 V minimum A-port operation (vs TXS0104ERUTR)
Design Notes
Sequence power so VCCA ramps before VCCB. Decouple both supply pins with 0.1 Β΅F ceramic capacitors placed within 2 mm of pins 1 and 12. VCCA must remain <= VCCB during all operating conditions, including transient brownouts, to prevent undefined channel states or excess current draw.
The most common failure mode reported on TI E2E forums is using the TXB0104 on open-drain buses such as I2C or 1-Wire, where the push-pull one-shot driver conflicts with external pull-ups. Use TXS0104E or LSF0104 for open-drain. Also avoid heavy capacitive loads (>30 pF) on channel pins, which can distort the one-shot edge acceleration.
The UQFN-12 (RUT) land pattern is only 1.7 mm x 2 mm; follow the TI datasheet mechanical drawing exactly for stencil aperture design. Keep A-port and B-port traces short and matched per channel to minimize the ~5 ns one-shot propagation skew. Use the OE pin with a 10-kOhm pull-down if power sequencing control from firmware is needed.
Compliance Information
RoHS compliant and lead-free per TI product page and distributor listings. Detailed REACH/halogen status: [DATA_NEEDED].
