TXG1021-Q1 - ±10V 2-bit Ground-Level Translator | TI
料号： TXG1021-Q1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.68 | $1.68 |
| 10 | $1.51 | $15.10 |
| 100 | $1.24 | $124.00 |
| 500 | $1.02 | $510.00 |
| 1,000 | $0.86 | $860.00 |
TXG1021-Q1 概述
A ground-level translator is a specialized voltage translator that solves a problem conventional level shifters cannot: signals referenced to grounds that sit at different DC potentials. In a classic automotive or industrial system, heavy load currents lifted through shared harness returns create millivolt-to-volt offsets between a sensor ground and a controller ground. Standard level shifters interpret those offsets as logic errors, while a non-galvanic ground-level translator tolerates the DC offset directly on its inputs while still reproducing clean logic edges at the destination domain.
Key features include AEC-Q100 qualification for automotive deployments, DC shift tolerance up to ±10V, AC noise rejection of 20VPP up to 45MHz, and common-mode transient immunity (CMTI) of 1kV/us. Channel-to-channel skew is below 0.20ns and propagation delay stays under 5ns, so the device does not become a timing bottleneck even in fast digital links. Quiescent power consumption is low at approximately 0.8mA per the manufacturer datasheet.
Architecturally, the TXG102x family uses a non-galvanic coupling approach rather than isolation barriers, giving it near-zero added latency compared with digital isolators while still rejecting ground potential differences. This makes it attractive for bridging control grounds in battery-managed, motor-driven, or switched-load environments where return paths are far from ideal.
Typical applications include automotive body-control and gateway modules, motor inverter gate-drive signaling across shifted grounds, industrial PLC I/O with grounded sensor offsets, and battery-management communication lines where cell-stacking creates ground potential differences.
Design consideration: verify that expected DC ground offset stays within the ±10V rating under all load and fault conditions, and follow the datasheet layout guidance for the ground-shifted domain.
This page adds value beyond the manufacturer datasheet by synthesizing drop-in alternatives, comparison tables, and practical design notes in one place.
直接替换替代料： TXG1021-Q1 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
TXG1021DR
✅ 直接替换📋 参考替代料（不在目录中）
TXG1020QDRQ1
✅ 直接替换📋 参考替代料（不在目录中）
TXG1020DR
✅ 直接替换📋 参考替代料（不在目录中）
TXG1021-Q1 规格参数
| Product Type | 2-bit fixed-direction ground-level translator |
| Configuration | 1/1 (unidirectional, 1 circuit, 2 channels) |
| DC Ground Shift Range | ±10 V |
| Logic-Level Translation Range | 1.71 V to 5.5 V |
| Maximum Data Rate | 264 Mbps (DigiKey listing); >250 Mbps per TI datasheet |
| Propagation Delay | < 5 ns |
| Channel-to-Channel Skew | < 0.20 ns |
| CMTI | 1 kV/us |
| AC Noise Rejection | 20 VPP up to 45 MHz |
| 电源电流 | 0.8 mA (low power, per datasheet feature list) |
| 封装 | 8-SOIC (D) |
| 安装类型 | Surface Mount |
| Qualification | AEC-Q100 qualified (automotive) |
| 电源电压 | 1.71 V to 5.5 V |
TXG1021-Q1 8-soic (d) 引脚配置指南
TXG1021-Q1（8-soic (d) 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： TXG1021-Q1.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TXG1021-Q1 适用于 6 应用s: Automotive Body Control and Gateway Modules, Motor Inverter Gate-Drive Signaling, Battery Management System Communication, Industrial PLC and Sensor I/O, Grounded Sensor Interfaces in Charged Systems, Server and Telecom Backplane Signaling.
Automotive Body Control and Gateway Modules
In body-control modules (BCM) and gateway ECUs, signals between the main microcontroller ground and remotely grounded sensors or load drivers frequently ride on harness return drops of volts rather than millivolts. The TXG1021-Q1 tolerates DC ground shifts up to ±10V while translating logic levels between 1.71V and 5.5V domains, so a 3.3V MCU can reliably drive a load-side circuit referenced to a shifted ground. Its sub-5ns propagation delay keeps communication timing intact for 250Mbps-class links, and 1kV/us CMTI with 20VPP noise rejection up to 45MHz protects signal integrity against load-dump transients and switched-load ringing. AEC-Q100 qualification makes it directly usable in production vehicle programs without deviation requests.
推荐
Motor Inverter Gate-Drive Signaling
Motor-drive systems place gate drivers and shunt-sensing circuits on grounds that swing and offset relative to the controller ground due to high phase currents. The TXG1021-Q1 bridges PWM and fault-feedback signals across these shifted grounds, tolerating up to ±10V DC offset while rejecting 20VPP of AC noise to 45MHz - covering switching ripple on the shifted domain. With 264Mbps capability and under 0.20ns channel-to-channel skew, both PWM channels remain time-aligned, which matters for dead-time accuracy in half-bridge topologies. Unlike digital isolators, its non-galvanic path adds minimal latency, preserving tight PWM timing budgets in traction and auxiliary inverter control boards.
推荐
Battery Management System Communication
Battery stacks create ground potential differences between cell-monitor boards and the pack controller; harness drops add further offset. The TXG1021-Q1 passes communication and control signals across these differences with its ±10V DC shift tolerance, while the 0.8mA supply current keeps quiescent drain negligible in always-on supervision circuits. Its 1kV/us CMTI withstands fast transients from contactor switching and charger connection events. Because it performs both ground-level shifting and standard 1.71V-to-5.5V logic translation in one 8-SOIC device, designers replace multi-component discrete shifting networks, improving reliability and board area in automotive 12V and low-voltage BMS architectures requiring AEC-Q100 parts.
推荐
Industrial PLC and Sensor I/O
Factory-floor sensor returns frequently sit hundreds of millivolts to volts above the PLC controller ground because of shared return impedance, especially with high-current actuators on the same backplane. A conventional level shifter would count this offset as data errors. The TXG1021-Q1 fixes the problem directly: signals crossing up to ±10V of ground difference are reproduced cleanly at the controller-side logic level, with 20VPP AC noise rejection to 45MHz handling VFD and contactor interference common in industrial cabinets. Sub-5ns delay supports fast encoder and step/direction signals above 250Mbps, making it suitable for motion-control I/O cards as well as general discrete sensing channels.
推荐
Grounded Sensor Interfaces in Charged Systems
Systems such as welding equipment, electrochemical instrumentation, and high-voltage test gear place sensors on grounds that float tens of volts above system earth through normal operation within the translator's ±10V envelope. The TXG1021-Q1 carries the sensor's digital output across that offset into controller-referenced logic without isolation barrier cost or latency. Its non-galvanic coupling passes signals above 250Mbps, enabling fast sampling chains, while AC noise rejection up to 45MHz suppresses switching pickup. Designers must confirm the sustained offset stays inside ±10V; beyond that, a true galvanic isolator is required instead, so the translator fits moderate-offset applications best.
推荐
Server and Telecom Backplane Signaling
High-current telecom and server backplanes develop measurable ground offsets between cards because of return-path IR drop, particularly under dynamic load steps. Status, enable, and telemetry signals crossing these offsets benefit from the TXG1021-Q1's ±10V tolerance and its fast sub-5ns edges that support backplane health-monitoring links well past 250Mbps. The 0.8mA supply current suits always-on shelf-management circuits, and 1kV/us CMTI handles hot-swap transients when cards insert into a live backplane. Using one 8-SOIC translator per signal pair simplifies design versus discrete resistor-capacitor coupling networks that compromise speed and noise margin.
推荐
推荐产品汇总
工程参考数据： TXG1021-Q1 ——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 | TXG1021DR | TXG1020QDRQ1 | TXG1020DR |
|---|---|---|---|---|
| Package | 8-SOIC (D) | 8-SOIC (D) - same | 8-SOIC (D) - same | 8-SOIC (D) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Configuration | 1/1 (2-bit fixed direction) | 1/1 (2-bit fixed direction) | 2/0 (2-bit fixed direction) | 2/0 (2-bit fixed direction) |
| DC Ground Shift Range | ±10 V | ±10 V | ±10 V | ±10 V |
| Logic Translation Range | 1.71 V to 5.5 V | 1.71 V to 5.5 V | 1.71 V to 5.5 V | 1.71 V to 5.5 V |
| Max Data Rate | >250 Mbps (264 Mbps listed) | >250 Mbps | >250 Mbps | >250 Mbps |
| AEC-Q100 Qualification | Qualified | Not qualified (commercial grade) | Qualified | Not qualified (commercial grade) |
| Supply Current | 0.8 mA (typ, per datasheet features) | 0.8 mA (typ) | 0.8 mA (typ) | 0.8 mA (typ) |
关键差异点
- Automotive qualification with identical function （对比 TXG1021DR)
- Near-zero added latency versus digital isolators （对比 Digital isolator alternatives)
- Direction configuration choice within same footprint （对比 TXG1020QDRQ1)
设计说明
Confirm the sustained DC offset between the two ground domains stays within the ±10V rating under worst-case load, cable resistance, and fault conditions - not just nominal operation. The TXG1021-Q1 is non-galvanic: it tolerates ground offsets but does NOT provide safety isolation for kilovolt differences. If your application requires certified isolation (creepage/clearance per safety standards), a digital isolator is the correct device, not this translator.
Partition the board so the ground-shifted domain has its own tight return path, clearly separated from controller-ground copper pours. Place decoupling capacitors close to each supply pin per the TI datasheet layout guidance. Because the input side rides on a ground carrying large common-mode swings, keep those traces short and away from sensitive analog nodes to limit capacitive coupling of transients into low-level circuits.
The 1kV/us CMTI and 20VPP AC noise rejection up to 45MHz handle switching transients, but verify noise spectra in your specific system - fast dV/dt events from IGBT/SiC switching above the rejection band can still couple. Keep series impedance low on the shifted-ground side and use the sub-0.20ns channel-to-channel skew advantage by routing both channel traces with matched lengths when dead-time accuracy matters, as in half-bridge PWM signaling.
合规信息
AEC-Q100 qualified for automotive applications per TI datasheet and product page. RoHS/REACH/lead-free status not captured in verified data - confirm on TI product page.
