TXB0604 - 4-Bit Auto-Bidirectional Level Translator 345Mbps | TI
N.º de pieza: TXB0604 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.35 | $1,35 |
| 10 | $1.22 | $12,20 |
| 100 | $0.98 | $98,00 |
| 500 | $0.82 | $410,00 |
| 1.000 | $0.65 | $650,00 |
TXB0604 Descripción general
A voltage level translator is an integrated circuit that allows digital signals to cross between different voltage domains, ensuring valid logic levels and signal integrity in mixed-voltage systems. Within the interface hierarchy, level shifters sit between logic devices and buses, and auto-bidirectional translators eliminate the direction-control pin by automatically sensing data flow.
Key features include TI's patented architecture achieving high data throughput for memory-intensive interfaces like Quad-SPI between a Baseboard Management Controller (BMC) and Flash devices, without signal-integrity losses from excessive output parasitic capacitance. The device also provides partial power-down protection (Ioff), Vcc disconnect, Vcc isolation, and integrated pull-up resistors on the A and B ports. Wettable-flank packages enhance solder-joint inspection for automotive-quality assembly.
Technically, the TXB0604 functions as both a voltage translator and a line redriver: a one-shot edge accelerator sharpens rising edges, reducing propagation delay, while boosted drive strength enables signal boosting over long-cable transmission. Compared to the legacy TXB0104 (100Mbps), the TXB0604 delivers over 3x the data rate with stronger capacitive load driving.
Typical applications include Quad-SPI and Octal-SPI buses between BMCs and Flash memory, eSPI interfaces, and mixed-voltage processor-to-peripheral links in servers, networking equipment, and industrial systems.
Design tip: always ensure VCCA <= VCCB, place decoupling capacitors close to both supply pins, and avoid floating unused inputs in partial power-down states. Pricing below is as of 2026-08-30.
Alternativas directas para TXB0604 — 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 TXB0604 (mismo factor de forma y huella) — difiere en Channels, Direction Control.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TXB0104PWR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TXB0104QRUTRQ1
⚡ Mismo encapsulado✓ En stock
$0.55 / unidad
Ver hoja de datos →TXU0104PWR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TXU0204PWR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
ADG3304BRUZ
⚡ Mismo encapsulado📋 Alternativa de referencia (no en el catálogo)
TXB0604 Especificaciones
| Función | 4-bit non-inverting auto-bidirectional voltage level translator / line redriver |
| Velocidad de datos | 345 Mbps (15 pF load) |
| Data Rate (100 pF load) | 190 Mbps |
| VCCA Range (A port) | 0.9 V to 2 V |
| VCCB Range (B port) | 1.65 V to 3.6 V |
| Supply Constraint | VCCA <= VCCB |
| Canales | 4 |
| Direction Control | Auto-bidirectional (no DIR pin) |
| Package (primary) | 14-TSSOP (PWR) |
| Package (alternative) | 12-X2QFN 1.6x1.6 mm (RWBR) |
| Ioff (Partial Power-Down) | Yes |
| Vcc Isolation | Yes |
| Integrated Pull-ups | Yes (A and B ports) |
| Special Features | Vcc disconnect, one-shot edge accelerator, wettable flank option |
| Estado RoHS | Compliant |
Configuración de pines de TXB0604
| Pin 1 | VCCA — A-port supply, 0.9V to 2V |
| Pin 2 | A1 — A-port data 1 (auto-bidirectional) |
| Pin 3 | A2 — A-port data 2 (auto-bidirectional) |
| Pin 4 | A3 — A-port data 3 (auto-bidirectional) |
| Pin 5 | A4 — A-port data 4 (auto-bidirectional) |
| Pin 6 | GND — Ground |
| Pin 7 | NC / OE — No connect or output enable per package datasheet |
| Pin 8 | B4 — B-port data 4 (auto-bidirectional) |
| Pin 9 | B3 — B-port data 3 (auto-bidirectional) |
| Pin 10 | B2 — B-port data 2 (auto-bidirectional) |
| Pin 11 | B1 — B-port data 1 (auto-bidirectional) |
| Pin 12 | VCCB — B-port supply, 1.65V to 3.6V |
| Pin 13 | NC — No connect (TSSOP-14) |
| Pin 14 | NC — No connect (TSSOP-14) |
Aplicaciones típicas
TXB0604 es adecuado para 6 aplicacións: Quad-SPI BMC-to-Flash Interface, Server and Datacenter Mixed-Voltage I/O, Networking Equipment Line Redriving, Industrial Automation Interfaces, Automotive-Quality Assembly Modules, eSPI and Low-Voltage Bus Expansion.
Quad-SPI BMC-to-Flash Interface
The TXB0604's flagship application: translating Quad-SPI signals between a low-voltage Baseboard Management Controller and 3.3V NOR flash in servers. Its patented architecture sustains 345Mbps at 15pF load without the signal-integrity losses caused by excessive output parasitic capacitance found in conventional translators. Placed between the BMC SPI master and the W25Q-class flash, the one-shot edge accelerator sharpens edges so the 50-100MHz quad clock meets flash timing margins even with board trace capacitance, while Ioff protection allows safe sequencing during partial power-down states.
Recomendado
Server and Datacenter Mixed-Voltage I/O
Servers routinely mix 1.2V/1.8V silicon with 3.3V legacy peripherals. The TXB0604 bridges these domains with VCCA down to 0.9V and VCCB up to 3.6V, under the VCCA <= VCCB rule. Vcc isolation and Vcc disconnect features ensure that when one rail collapses, the translator outputs do not back-drive the powered-down domain, protecting BMC and CPLD I/O rings. The 4-bit width matches common control and status buses, and auto-direction sensing removes firmware-managed DIR pins, reducing software complexity in dense datacenter platforms.
Recomendado
Networking Equipment Line Redriving
In switches and routers, control signals traverse long board traces or backplane cabling that add significant capacitance. The TXB0604 doubles as a line redriver: boosted drive strength and the edge accelerator restore rise times degraded by cable capacitance, sustaining over 190Mbps even with 100pF loads. This remedies voltage domain mismatches and signal attenuation simultaneously, which legacy translators like TXB0104 cannot do at speed. Place the device near the cable connector for maximum benefit, with local decoupling on both VCCA and VCCB rails.
Recomendado
Industrial Automation Interfaces
Industrial PLC and sensor systems combine low-voltage MCUs (1.8V class) with 3.3V or 5V-tolerant field I/O. The TXB0604's four auto-bidirectional channels shift SPI or parallel status buses without direction control logic, and Ioff partial power-down protection is essential where modules are hot-plugged or powered independently. Integrated pull-ups on both ports hold undefined lines at valid levels during startup, preventing glitch-triggered state machine faults. Operating alongside industrial MCUs such as the MSPM0 family, it provides robust, glitch-free domain crossing on 4-bit buses.
Recomendado
Automotive-Quality Assembly Modules
The TXB0604 is offered in wettable-flank packages that enable automated optical inspection (AOI) and X-ray solder-joint inspection demanded by automotive-quality assembly lines. Translation between 1.2V domain controllers and 3.3V sensors or memories in ADAS and body-electronics modules benefits from Ioff protection and auto-direction operation, which tolerate the unsequenced power states common in vehicles. Where full AEC-Q100 qualification is mandatory, engineers should verify the specific orderable grade on the TI product page, as the summarized data does not state Q1 status.
Recomendado
eSPI and Low-Voltage Bus Expansion
The eSPI bus and similar low-voltage expansion interfaces run at 1.8V while companion devices or test points often require 3.3V. The TXB0604 translates these four-bit-wide buses at the speeds eSPI requires, and its redriver function compensates for the capacitance of socketed test fixtures and debug headers. Vcc isolation allows the debug rail to be removed without corrupting the main bus, and the compact 12-X2QFN (1.6x1.6mm) RWBR package fits the tight routing regions typical of expansion connector regions on modern embedded boards.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TXB0604 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TXB0104PWR | TXB0104QRUTRQ1 | TXU0104PWR | ADG3304BRUZ |
|---|---|---|---|---|---|
| Package | 14-TSSOP (PWR) / 12-X2QFN (RWBR) | 14-TSSOP - same footprint | 14-SON (RUT) - different footprint | 14-TSSOP - same footprint | 14-TSSOP - pinout differs |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Direction Control | Auto-bidirectional | Auto-bidirectional | Auto-bidirectional | Fixed direction | Auto-bidirectional |
| VCCA Range | 0.9 V to 2 V | 1.2 V to 3.6 V | 1.2 V to 3.6 V | 1.65 V to 3.6 V | 1.15 V to 5.5 V |
| Ioff (Partial Power-Down) | Yes | No | No | Yes | No |
| Integrated Pull-ups | Yes (A and B) | Yes | Yes | Yes (integrated pull-ups/pull-downs) | No |
| Line Redriver / Edge Accelerator | Yes | No | No | No | No |
Diferenciadores clave
- 345Mbps data rate vs 100Mbps legacy (frente a TXB0104PWR)
- Line redriver with edge accelerator (frente a TXB0104PWR)
- Partial power-down Ioff and Vcc isolation (frente a TXB0104QRUTRQ1)
- Trade-off: fixed-direction siblings give cleaner timing (frente a TXU0104PWR)
Notas de diseño
Always enforce VCCA <= VCCB in the power sequencing design; the TXB0604 datasheet constrains A-port supply (0.9V-2V) to never exceed B-port supply (1.65V-3.6V). Place 0.1uF ceramic decoupling capacitors within 2mm of both VCCA and VCCB pins. The Ioff and Vcc isolation features tolerate partial power-down, but floating rails during startup can still cause undefined bus states - add weak external pull-downs if the bus must be quiet at boot.
For Quad-SPI clock lines, keep traces short and series-terminate at the driver. The TXB0604's one-shot edge accelerator redrives edges, which helps at 100pF loads (190Mbps+), but the one-shot can interact with very slow or glitchy edges - avoid RC-filtered signals on translated channels. TI app note SDAA333 provides comparative waveforms vs TXB0104 for timing closure at high speeds.
Do not use the TXB family on open-drain buses such as I2C; the push-pull drive and integrated pull-ups cause contention - use TXS-family devices instead. Unused inputs should not float in partial power-down states. When substituting the legacy TXB0104 footprint, note the TXB0604's added Vcc isolation behavior can leave B-port outputs at valid logic rather than Hi-Z when A-side is unpowered, which may require system-level review.
Información de cumplimiento
RoHS compliant and lead-free per TI product data. Wettable-flank package options available for automotive-quality assembly. AEC-Q100 qualification status and REACH detail not stated in summarized data - consult TI product page.
