TXB0604 - 4-Bit Auto-Bidirectional Level Translator 345Mbps | TI
料号： TXB0604 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 概述
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.
直接替换替代料： TXB0604 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TXB0604 （相同外形与封装尺寸） ——差异在于 Channels, Direction Control.
快速对比工具——选择替代料号进行并排对比：
TXB0104PWR
✅ 直接替换📋 参考替代料（不在目录中）
TXB0104QRUTRQ1
⚡ 相同封装✓ 有现货
$0.55 / 个
查看数据手册 →TXU0104PWR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TXU0204PWR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADG3304BRUZ
⚡ 相同封装📋 参考替代料（不在目录中）
TXB0604 规格参数
| 功能 | 4-bit non-inverting auto-bidirectional voltage level translator / line redriver |
| 数据速率 | 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 |
| 通道数 | 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 |
| RoHS 状态 | Compliant |
TXB0604 引脚配置
| 引脚 1 | VCCA — A-port supply, 0.9V to 2V |
| 引脚 2 | A1 — A-port data 1 (auto-bidirectional) |
| 引脚 3 | A2 — A-port data 2 (auto-bidirectional) |
| 引脚 4 | A3 — A-port data 3 (auto-bidirectional) |
| 引脚 5 | A4 — A-port data 4 (auto-bidirectional) |
| 引脚 6 | GND — Ground |
| 引脚 7 | NC / OE — No connect or output enable per package datasheet |
| 引脚 8 | B4 — B-port data 4 (auto-bidirectional) |
| 引脚 9 | B3 — B-port data 3 (auto-bidirectional) |
| 引脚 10 | B2 — B-port data 2 (auto-bidirectional) |
| 引脚 11 | B1 — B-port data 1 (auto-bidirectional) |
| 引脚 12 | VCCB — B-port supply, 1.65V to 3.6V |
| 引脚 13 | NC — No connect (TSSOP-14) |
| 引脚 14 | NC — No connect (TSSOP-14) |
典型应用
TXB0604 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： TXB0604 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- 345Mbps data rate vs 100Mbps legacy （对比 TXB0104PWR)
- Line redriver with edge accelerator （对比 TXB0104PWR)
- Partial power-down Ioff and Vcc isolation （对比 TXB0104QRUTRQ1)
- Trade-off: fixed-direction siblings give cleaner timing （对比 TXU0104PWR)
设计说明
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.
合规信息
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.
