TXB0104RUTR - 4-Bit Bidirectional Level Shifter | Texas Instruments
N.º de pieza: TXB0104RUTR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.32 | $1,32 |
| 10 | $1.19 | $11,90 |
| 100 | $0.98 | $98,00 |
| 500 | $0.79 | $395,00 |
| 1.000 | $0.65 | $650,00 |
TXB0104RUTR Descripción general
A voltage-level translator, also called a level shifter, is an integrated circuit in the logic-translation family that enables communication between digital devices operating at different supply voltages. In mixed-voltage systems, a 1.8 V or 3.3 V MCU may need to interface with 5 V peripherals; translators convert logic levels bidirectionally while protecting low-voltage silicon. The TXB0104 belongs to the auto-direction-sensing translator family, eliminating direction-control pins and simplifying both PCB design and firmware.
Key features include per-channel automatic direction sensing, ±15-kV HBM ESD protection on all pins, tri-state outputs with an output-enable (OE) pin for bus isolation, and an operating temperature range of -40C to +85C. Low quiescent current and the tiny UQFN footprint suit space-constrained portable designs.
Architecturally, the TXB0104 uses a one-shot edge accelerator that speeds rising and falling edges, enabling 100 Mbps operation with low static power. The A port tracks VCCA and the B port tracks VCCB. Partial power-down via OE and Ioff-style isolation make it suitable for hot-insertion environments.
Typical applications include SPI, UART, and push-pull GPIO level shifting between MCUs, sensors, SIM card and SD card interfaces, and memory peripherals in mobile, industrial, and consumer products. The push-pull driver topology is not recommended for open-drain buses such as I2C or 1-Wire, as confirmed in TI E2E forum threads.
Design tip: power VCCA before VCCB, place 0.1 uF bypass capacitors close to both supply pins, and use the OE pin for sequencing. For open-drain buses, consider TXS0104E instead.
Alternativas directas para TXB0104RUTR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con TXB0104RUTR (mismo factor de forma y huella) — difiere en Operating Temperature, Package, Automotive Qualification, Data Rate, ESD Protection.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TXB0104QRUTRQ1
✅ Sustitución directa✓ En stock
$0.55 / unidad
Ver hoja de datos →TXS0104ERUTR
⚡ Mismo encapsulado ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
NTS0104GU12
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TXB0104RUTR Valores máximos y características eléctricas
| Función | 4-bit bidirectional voltage-level translator |
| A Port Voltage Range | 1.2 V to 3.6 V |
| B Port Voltage Range | 1.65 V to 5.5 V |
| Translation Type | Bidirectional, auto direction sensing (push-pull) |
| Number of Channels | 4 |
| Max Data Rate | 100 Mbps |
| ESD Protection | ±15 kV HBM |
| Tipo de salida | Tri-state with output enable (OE) |
| Temperatura de funcionamiento | -40C to +85C |
| Encapsulado | 12-UQFN (RUT), 1.7 mm x 2.0 mm |
| Supply Condition | VCCA <= VCCB |
| Tipo de montaje | Surface Mount |
Configuración de pines de TXB0104RUTR
| Pin 1 | A1 — A-port data 1 |
| Pin 2 | VCCA — A-port supply, 1.2 V to 3.6 V |
| Pin 3 | GND — Ground |
| Pin 4 | B1 — B-port data 1 |
| Pin 5 | B2 — B-port data 2 |
| Pin 6 | OE — Output enable, tri-state control |
| Pin 7 | B3 — B-port data 3 |
| Pin 8 | B4 — B-port data 4 |
| Pin 9 | VCCB — B-port supply, 1.65 V to 5.5 V |
| Pin 10 | A4 — A-port data 4 |
| Pin 11 | A3 — A-port data 3 |
| Pin 12 | A2 — A-port data 2 |
Aplicaciones típicas
TXB0104RUTR es adecuado para 6 aplicacións: SPI Level Shifting, SD Card and SIM Card Interfaces, Push-Pull GPIO Expansion, UART Communication Bridges, Portable and Wearable Electronics, Industrial Mixed-Voltage Subsystems.
SPI Level Shifting
The TXB0104RUTR provides bidirectional level translation for 4-wire SPI buses between a 1.8V or 3.3V MCU and 3.3V or 5V peripherals. Its 100 Mbps capability comfortably covers typical SPI clock rates, and auto direction sensing removes the need for a DIR pin on the shared MISO line. Place the translator close to the peripheral and use 0.1 uF bypass capacitors on both VCCA and VCCB. Note the ~4k ohm output impedance limits drive strength, so keep traces short and avoid heavily loaded buses.
Recomendado
SD Card and SIM Card Interfaces
SD and SIM card controllers often run at 1.8V while legacy card interfaces expect 3.3V. The TXB0104RUTR translates CMD, CLK, and data lines bidirectionally at up to 100 Mbps, matching high-speed card clocking requirements. The ±15-kV HBM ESD rating protects the translator against card insertion transients. Because card slots are user-accessible and card insertion sequencing varies, use the OE pin to keep the translator tri-stated until card power is stable, preventing contention during hot insertion.
Recomendado
Push-Pull GPIO Expansion
General-purpose GPIO level shifting between mixed-voltage domains, such as a 1.8V sensor readout feeding a 5V PLC input, is the most common TXB0104RUTR use case. Each of the 4 channels senses direction automatically per transition, so one package replaces four discrete two-transistor shifters. The tiny 1.7 mm x 2.0 mm UQFN footprint fits dense portable boards. Verify the receiving side can tolerate the TXB output impedance of roughly 4k ohm at both rails, which limits DC fan-out to light loads.
Recomendado
UART Communication Bridges
UART TX and RX lines between a 1.8V application processor and a 5V RS-232 transceiver or GPS module are cleanly translated by the TXB0104RUTR, using two of its four channels. The auto-direction feature handles the opposing directions of TX and RX without control pins, and the 100 Mbps rating is far above typical UART baud rates, ensuring clean edge timing. Wire unused channels per the datasheet recommendation (inputs tied to VCCA) to minimize power draw and avoid floating-node oscillation.
Recomendado
Portable and Wearable Electronics
Space-constrained portable devices benefit from the 1.7 mm x 2.0 mm UQFN package and low quiescent power of the TXB0104RUTR when interfacing 1.8V processors with 3.3V peripheral rails. The -40C to +85C range covers typical consumer environmental requirements, and tri-state OE enables partial power-down of sub-systems to save battery. For industrial-grade extended temperature (-40C to +125C), the pin-compatible automotive variant TXB0104QRUTRQ1 can be dropped onto the same footprint without redesign.
Recomendado
Industrial Mixed-Voltage Subsystems
In industrial controllers mixing 3.3V logic with 5V field-side sensors and actuators, the TXB0104RUTR translates push-pull control and feedback signals bidirectionally. The ±15-kV ESD rating adds robustness near connectors, and the OE pin supports deterministic power sequencing required in DIN-rail modules. Because the industrial 24V domain typically has transients, keep the translator behind local ESD/TVS devices and route translated lines with series damping resistors if cable stubs are present.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TXB0104RUTR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TXB0104QRUTRQ1 | NTS0104GU12 | TXS0104ERUTR |
|---|---|---|---|---|
| Package | 12-UQFN (RUT) 1.7mm x 2.0mm | 12-UQFN (RUT) - same | 12-XQFN - same footprint (verify) | 12-UQFN (RUT) - same |
| Brand | Texas Instruments | Texas Instruments | Nexperia | Texas Instruments |
| A Port Range | 1.2 V to 3.6 V | 1.2 V to 3.6 V | 1.2 V to 3.6 V | 1.65 V to 3.6 V |
| B Port Range | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 2.3 V to 5.5 V |
| Open-Drain (I2C) Support | No | No | No (push-pull) | Yes |
Diferenciadores clave
- Wider A-port range than TXS0104ERUTR (frente a TXS0104ERUTR)
- Automotive drop-in upgrade path (frente a TXB0104QRUTRQ1)
- Cross-brand second source availability (frente a NTS0104GU12)
Notas de diseño
Power VCCA before VCCB and keep VCCA <= VCCB per the TI TXB0104 datasheet. Use the OE pin to keep outputs tri-stated until both supplies are stable, which provides clean power sequencing in multi-rail systems. Place 0.1 uF ceramic bypass capacitors within 2 mm of both VCCA and VCCB pins to supply the transient charge demanded by the one-shot edge accelerators.
The TXB0104 outputs have approximately 4k ohm output impedance at both ports; this limits DC drive to light loads. Do not connect pull-up or pull-down resistors directly on translated lines, as they fight the auto-direction sensing and can corrupt the logic level. Keep traces short and unterminated stubs minimal at 100 Mbps operation.
The most common design failure is using TXB0104 on open-drain buses (I2C, 1-Wire); TI E2E forum threads document failed designs. The push-pull one-shot architecture cannot sustain a low level imposed by an external open-drain device. Select TXS0104E for those protocols. Unused channels should have inputs tied to VCCA rather than left floating.
The 12-UQFN (RUT) land pattern requires fine-pitch soldering; follow the TI recommended footprint with a non-solder-mask-defined pad. Add via-in-pad or short thermal relief to the ground connection for repeatable reflow. Consider reusing the same footprint with the automotive TXB0104QRUTRQ1 for future mixed industrial/automotive BOM flexibility.
Información de cumplimiento
Compliance data not present in verified web data; consult TI product page at ti.com/product/TXB0104 for RoHS/REACH certificates.
