TXB0104-Q1 - 4-Bit Auto-Direction Level Translator | TI
MPN： TXB0104-Q1 ✓ 啟用中TXB0104-Q1 概覽
A voltage-level translator is a logic-family device that allows integrated circuits operating at different supply voltages on the same PCB to exchange digital signals safely. Within the power-and-signal-management hierarchy, it sits alongside buffers and bus switches as a fundamental interface IC, preventing overvoltage damage and ensuring valid logic thresholds between low-voltage MCUs, FPGAs, and 5 V peripherals.
Key features include auto-direction sensing, which eliminates the DIR control pins required by '245-style translators, a data rate of up to 100 Mbps, and VCC isolation: when either supply is at GND, all I/O enters Hi-Z. The AEC-Q100-qualified TXB0104-Q1 also carries +/-15 kV HBM ESD protection, exceeding the standard JESD ratings cited in the TI datasheet family.
Architecturally, the TXB0104 uses a self-directed, edge-rate-driven one-shot scheme that detects the direction of each transition and briefly strengthens the opposite driver, allowing it to drive 4 channels in either direction without software intervention. The OE pin three-states all outputs for power sequencing and bus isolation.
Typical applications include SPI and UART level conversion between 3.3 V MCUs and 5 V peripherals, GPIO expansion in automotive body and infotainment modules, and mixed-voltage FPGA I/O. Note that the push-pull architecture is not recommended for open-drain buses such as I2C or 1-Wire; use the TXS0104E-Q1 for those.
Design consideration: keep unloaded outputs low-impedance driven or grounded, since the auto-direction circuitry can oscillate on lightly loaded or capacitively large nets; series resistors above 25 k-ohm are not supported.
This page adds value beyond the TI datasheet by synthesizing distributor availability, drop-in alternatives (NXP NTS0304E, ADI ADG3304), and practical design notes for automotive level-shifter selection.
直接替換替代品，適用於 TXB0104-Q1 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TXB0104-Q1 （相同外形與佔位） — 差異在於 Automotive Qualification, Data Rate, Package.
TXB0104PWR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TXS0104EPWR
✅ 直接替換📋 參考替代品（不在目錄中）
TXU0104PWR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
NTS0304EPWJ
✅ 直接替換📋 參考替代品（不在目錄中）
ADG3304BRUZ
✅ 直接替換📋 參考替代品（不在目錄中）
TXB0104QRUTRQ1
✅ 直接替換聯絡詢價
查看資料表 →TXB0104-Q1 規格
| Product Type | 4-bit bidirectional voltage-level translator |
| 通道數 | 4 |
| VCCA Supply Range | 1.2 V to 3.6 V |
| VCCB Supply Range | 1.65 V to 5.5 V |
| 資料速率 | 100 Mbps |
| Direction Control | Automatic direction sensing |
| ESD Protection (HBM) | +/-15 kV |
| 輸出類型 | Push-pull, 3-state (OE controlled) |
| VCC Isolation | Yes - Hi-Z when either VCC is at GND |
| Automotive Qualification | AEC-Q100 |
| 封裝 | TSSOP-14 (PW) |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +125C |
| Logic Family | TXB (auto-direction translating transceiver) |
| RoHS 狀態 | Compliant |
TXB0104-Q1 tssop-14 (pw) 腳位配置指南
TXB0104-Q1（tssop-14 (pw) 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： TXB0104-Q1.
請參閱 資料表 以查看完整腳位配置。
典型應用
TXB0104-Q1 適用於 6 應用s: Automotive Body Control Modules, SPI and UART Level Translation, Mixed-Voltage FPGA I/O Expansion, Industrial Sensor Interface, Portable and Consumer Mixed-Rail Designs, Infotainment and Display Interfaces.
Automotive Body Control Modules
The TXB0104-Q1 is AEC-Q100 qualified, making it suitable for level translation between a 3.3 V microcontroller and 5 V automotive peripheral sensors or actuators inside body control modules, gateways, and lighting controllers. Its +/-15 kV ESD rating withstands harsh 12 V-vehicle assembly and in-service environments, while VCC isolation (Hi-Z when either rail is grounded) protects the logic during cold-crank and load-dump power sequencing events. Placed on the MCU GPIO bank with OE tied to the 3.3 V rail through an RC delay, all four channels safely bridge 1.8-3.3 V processor I/O to legacy 5 V modules. The auto-direction feature removes firmware burden - no direction pins need servicing inside interrupt routines. Keep translations below 100 Mbps and avoid open-drain buses, using TXS0104E-Q1 for those nets.
推薦
SPI and UART Level Translation
SPI (up to ~50 MHz clock) and UART signaling are push-pull, exactly matching the TXB0104-Q1's auto-direction push-pull architecture. Connecting a 1.8 V or 3.3 V MCU to a 5 V SD card, flash memory, or GPS module requires only the translator between rails: SCLK, MOSI, and CS flow MCU-to-peripheral while MISO flows back, and the one-shot direction sensing handles per-edge direction changes on the shared net without software overhead. The 100 Mbps rating provides generous timing margin over standard SPI clock rates. Place the device close to the load with 100 nF decoupling on both VCCA and VCCB. Do not add series resistors above 25 k-ohm on SPI lines - they weaken the edge-rate detection and cause signal integrity failures.
推薦
Mixed-Voltage FPGA I/O Expansion
FPGA banks such as those on Xilinx 7-series devices often run banks at 1.8 V while board-level peripherals, LEDs, and legacy buses expect 3.3 V or 5 V. The TXB0104-Q1 bridges these domains on general-purpose push-pull nets: VCCA tracks the 1.8 V bank rail, VCCB tracks the 3.3 V or 5 V system rail, and the OE pin, driven by FPGA power-good, guarantees Hi-Z during configuration to prevent bus contention with other reset-of-fab drivers. Its 100 Mbps capability supports medium-speed parallel buses and status signaling beyond what resistor-divider solutions allow. For heavily loaded nets, verify that trace capacitance stays below the one-shot re-trigger threshold; short point-to-point routes on the same PCB are the intended topology.
推薦
Industrial Sensor Interface
Industrial controllers frequently mix a modern 3.3 V MCU with 5 V-dominant sensors, encoders, and legacy PLC-side signaling. The TXB0104-Q1's 1.2-3.6 V VCCA and 1.65-5.5 V VCCB ranges cover this exact combination, and its -40C to +125C operating envelope suits cabinet and machine-mounted electronics. Because each channel auto-senses direction, bidirectional lines such as ready/acknowledge handshakes work without host intervention. The +/-15 kV ESD capability provides extra margin near connector-entry points, though TVS diodes remain best practice on field-wired nets. Note that the push-pull architecture suits TTL/CMOS push-pull sensor outputs only; for open-collector NPN sensor outputs, add an external pull-up stage or select the TXS0104E-Q1 instead.
推薦
Portable and Consumer Mixed-Rail Designs
Battery-powered consumer products commonly combine a 1.8 V application processor with 3.3 V memory cards, 2.5 V RF modules, and 5 V USB-attached accessories. The TXB0104-Q1's wide 1.2 V VCCA support allows translation from the lowest processor banks, while VCC isolation prevents back-powering when the 5 V accessory rail is absent - all I/O go Hi-Z, protecting both sides. Although the standard TXB0104 may suffice for non-automotive builds, using the Q1 version adds thermal and ESD margin at near-identical cost. Keep VCCA decoupled with 100 nF close to the pin, sequence OE after both rails are stable, and route the four channels as short matched pairs when carrying clocked data above 50 Mbps.
推薦
Infotainment and Display Interfaces
Automotive infotainment head units bridge 1.8 V/3.3 V SoC graphics and control banks to 5 V backlight controllers, touch-controller interrupts, and legacy display enable lines. The TXB0104-Q1 translates four such control/status channels with auto-direction, eliminating direction-control firmware in display bring-up code. Its AEC-Q100 grade and -40C to +125C range meet cabin environment requirements, and the +/-15 kV ESD rating adds robustness at the display FPC connector where assembly handling stress is highest. Use OE under SoC power-good control so the translator stays Hi-Z through infotainment power sequencing and standby transitions. For high-speed LVDS or SerDes video itself, dedicated serializers are required - the TXB0104-Q1 serves the low-speed control plane only.
推薦
推薦產品摘要
工程參考資料，適用於 TXB0104-Q1 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TXB0104PWR | TXS0104EPWR | NTS0304EPWJ | ADG3304BRUZ | TXB0104QRUTRQ1 |
|---|---|---|---|---|---|---|
| Package | TSSOP-14 (PW) | TSSOP-14 (PW) - same | TSSOP-14 (PW) - same | TSSOP-14 (PW) - same | TSSOP-14 (RU-14) - same footprint | UQFN-12 (RU) - different |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | NXP Semiconductors | Analog Devices | Texas Instruments |
| Direction Control | Auto-direction sensing | Auto-direction sensing | Auto-direction sensing | Auto-direction (per NXP community) | Auto-direction | Auto-direction sensing |
主要差異化特點
- Auto-direction sensing with no DIR pins (對比TXU0104PWR)
- AEC-Q100 automotive qualification at TSSOP-14 cost point (對比TXB0104PWR)
- True push-pull 100 Mbps drive (對比ADG3304BRUZ)
設計說明
Never use the TXB0104-Q1 on I2C, 1-Wire, MDIO, or any open-drain bus. Its push-pull auto-direction architecture actively drives both rails, fighting external pull-ups and corrupting wired-OR data - this exact failure is documented in TI E2E thread 1577689 where a 1-Wire DQ design failed. Select the TXS0104E-Q1 (same TSSOP-14 footprint) for open-drain protocols. Also avoid series resistors above approximately 25 k-ohm in series with any data line: the one-shot direction-detection relies on edge rates that high resistance destroys.
Place 100 nF ceramic decoupling capacitors within 2 mm of both VCCA and VCCB pins, each with a low-inductance via to ground. Route the four translated channels as short, direct point-to-point nets below 50 mm; long or capacitively heavy traces (multi-drop stubs, cable harnesses) can exceed the one-shot drive capability and cause ringing or re-trigger oscillation. Tie the OE pin to VCCA through an RC (e.g., 10 k-ohm plus 100 nF) so outputs stay Hi-Z until both rails are stable, preventing bus contention during power sequencing.
The TXB0104-Q1 drives push-pull nets to 100 Mbps, but leave unused channels driven low from the source side or tied to ground on one port - floating auto-direction inputs can self-oscillate. For clocked buses (SPI above 50 MHz), verify setup/hold at the receiver since the translator adds propagation delay on every edge; consult the manufacturer datasheet timing tables for your exact VCCA/VCCB combination. For mixed push-pull and open-drain systems, dedicate TXB channels to push-pull and reserve a TXS0104E-Q1 for the open-drain nets rather than compromising on one part.
合規資訊
AEC-Q100 qualified per TI product page (automotive 4-bit translator). RoHS/lead-free per standard TI logic-family compliance; REACH and halogen-free status not stated in provided data.
