TXG4021-Q1 - ±40V 2-bit Ground-Level Translator | TI
部品番号: TXG4021-Q1 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
TXG4021-Q1 概要
A ground-level translator is a specialized type of voltage level shifter within the broader logic IC family. While standard level translators only shift logic thresholds between supply domains (for example 3.3V to 5V), a ground-level translator also bridges systems whose ground references differ by tens of volts - a common condition in automotive and industrial environments where load currents in shared returns lift local ground potentials. The TXG402x-Q1 family solves this without galvanic isolation, offering a lower-cost, smaller-footprint alternative to digital isolators where only ground-offset tolerance is needed.
Key features include the ±40V ground-shift tolerance, the 1.71V to 5.5V logic-level range on both sides, a fixed (unidirectional) direction configuration with two channels in a 1/1 arrangement, and a 264 Mbps maximum data rate. The -Q1 variant is qualified for automotive applications per TI's automotive qualification flow, supporting AEC-oriented design flows.
Architecturally, the device is non-galvanic: input and output stages share a common substrate reference topology that tolerates large ground differentials while translating logic swings, unlike optocoupler or transformer-based isolators. This yields lower propagation delay and lower cost than isolation approaches, with the trade-off that the ground offset is tolerated rather than fully isolated.
Typical applications include automotive body electronics and lighting modules, motor-drive gate-drive interfaces where ground lift occurs, and industrial PLC I/O cards bridging a 1.71V-5.5V controller domain to a high-side domain with a shifted ground.
Design consideration: because the part is unidirectional, confirm signal direction is fixed in your topology; it cannot be used for bidirectional buses such as I2C without external direction handling.
This page synthesizes verified distributor data, drop-in alternatives, and practical design guidance beyond the manufacturer datasheet.
ドロップイン代替品: TXG4021-Q1 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
TXG4021DR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TXG4021
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TXG4021-Q1 最大定格＆電気的特性
| 機能 | 2-bit fixed direction ground-level translator |
| チャネル数 | 2 (1 circuit, 2 channel, 1/1 configuration) |
| Direction Type | Unidirectional (fixed direction) |
| Ground-Level Shift Range | ±40 V |
| Logic-Level Range | 1.71 V to 5.5 V |
| Maximum Data Rate | 264 Mbps |
| Translator Type | Non-galvanic voltage and ground-level translator |
| Automotive Qualification | AEC-Q100 qualified (Q1 automotive variant) |
| パッケージ | 8-SOIC (D) |
| 実装タイプ | Surface Mount |
TXG4021-Q1 8-soic (d) ピン配置ガイド
TXG4021-Q1 (8-soic (d) パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: TXG4021-Q1.
詳細は データシート をご参照ください。
主な用途
TXG4021-Q1 の用途: 6 件s: Automotive Body Electronics and Lighting, Motor Drive and Gate-Driver Interface, Industrial PLC I/O Cards, Logic Level Shifting Between 1.71V and 5.5V Domains, Ground-Shift Tolerant Sensor Interfaces, Telecom and Backplane Control Signaling.
Automotive Body Electronics and Lighting
The TXG4021-Q1 fits automotive body-control and lighting modules because it is TI's -Q1 automotive-qualified grade of the TXG402x family and tolerates ground shifts up to ±40V - precisely the condition created in vehicles when high-current lamp or actuator return paths lift a local ground relative to the module controller ground. Its 1.71V to 5.5V logic range lets it interface directly with 3.3V or 5V automotive MCUs without additional level-shifting stages, and the fixed-direction 2-bit (1/1) configuration suits control and status signaling lines. The 264 Mbps data rate far exceeds the bandwidth required for these control links, providing ample timing margin. Use it between the MCU logic domain and high-side driver domains whose grounds differ, replacing more costly digital isolators where only ground-offset tolerance, not true isolation, is needed.
おすすめ
Motor Drive and Gate-Driver Interface
In motor-drive systems, current flowing through shared power returns commonly raises power-stage ground potentials by tens of volts relative to the controller ground. The TXG4021-Q1 addresses exactly this: its ±40V ground-level shift rating lets PWM or enable signals cross from the 1.71V-5.5V MCU domain to the power-stage domain without a galvanic isolator. The unidirectional 2-bit configuration maps well to PWM and enable lines with fixed direction, and the 264 Mbps capability leaves large timing headroom for even fast switching frequencies, keeping propagation-induced pulse distortion minimal. Because the part is non-galvanic, verify in your topology that the ground offset stays within ±40V under all fault conditions; for functional-safety cases requiring true isolation, a digital isolator remains the correct choice, but for pure ground-lift tolerance this part is smaller and cheaper.
おすすめ
Industrial PLC I/O Cards
PLC digital I/O cards must bridge a controller logic domain (1.71V to 5.5V) with field-side domains whose grounds can differ substantially due to long cable runs and high return currents. The TXG4021-Q1's ±40V ground-shift tolerance and 1.71V-5.5V logic range cover both requirements in a single 8-SOIC device, while its 264 Mbps rate supports fast status and control updates on parallel-style signaling. The fixed-direction, 2-bit (1/1) configuration suits output-control and input-status channels; two bits per device lets one SOIC-8 handle a paired signal. In noisy industrial cabinets, its non-galvanic tolerance of ground lift avoids the cost, delay, and footprint of optocouplers. Confirm the field-side offset remains within ±40V including surge events, and add standard TVS protection on field-facing nodes per your module's isolation strategy.
おすすめ
Logic Level Shifting Between 1.71V and 5.5V Domains
Beyond ground shifting, the TXG4021-Q1 works as a conventional fixed-direction logic level translator between supply domains in the 1.71V to 5.5V range - for example, a 1.8V MCU driving 5V legacy logic, or 3.3V outputs feeding 1.8V inputs. Because both sides accept the full 1.71V-5.5V range, designers gain flexibility in mixed-voltage boards without selecting asymmetric translator families. The 264 Mbps capability supports fast SPI, parallel address/data, and general GPIO signaling with low propagation delay compared to open-drain bidirectional translators. The two-channel unidirectional arrangement handles a clock-and-data pair per package, and the standard 8-SOIC footprint keeps routing simple. In purely same-ground designs, the ground-shift rating simply adds robustness headroom rather than being a mandatory feature, making this part a conservative choice for margin-focused designs.
おすすめ
Ground-Shift Tolerant Sensor Interfaces
Automotive and industrial sensors mounted on switched or high-current grounds can present ground potentials shifted relative to the ECU logic ground. A two-wire or pulse-type sensor signal referenced to a lifted ground exceeds the input range of ordinary buffers, but the TXG4021-Q1's ±40V ground-shift tolerance lets it receive such signals directly, translating them to the 1.71V-5.5V controller domain. Its fixed-direction inputs accept the sensor's digital output and the 264 Mbps limit imposes no constraint on typical sensor pulse trains (for example crank or cam style signals are orders of magnitude slower). Using this part avoids discrete resistive dividers or comparator-plus-reference chains, reducing component count and error sources. Verify sensor signal amplitude falls within the translator's logic thresholds and that continuous offset plus signal swing stays within the ±40V rating.
おすすめ
Telecom and Backplane Control Signaling
Line cards and backplane systems frequently contain slots whose ground references differ from the management-controller ground by several volts, and fault conditions can drive much larger offsets. The TXG4021-Q1 bridges these control signals: with logic levels from 1.71V to 5.5V and ground tolerance to ±40V, it moves fixed-direction status and control bits across the boundary in a compact 8-SOIC package. The 264 Mbps data rate supports fast alarm aggregation and enable distribution, while its non-galvanic design keeps cost and board area below optocoupler or digital-isolator solutions. The two-channel 1/1 configuration pairs naturally with alarm/enable signal pairs per card. During hot-swap or fault events, confirm that worst-case ground offset including transients remains within the ±40V rating; otherwise add series protection or select a true isolator for those rails.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: TXG4021-Q1 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | TXG4021DR | TXG4021 |
|---|---|---|---|
| Package | 8-SOIC (D) | 8-SOIC (D) - same | 8-SOIC (D) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Ground-Level Shift Range | ±40 V | ±40 V | ±40 V |
| Logic-Level Range | 1.71 V to 5.5 V | 1.71 V to 5.5 V | 1.71 V to 5.5 V |
| Bits / Channels | 2-bit, 1/1 configuration | 2-bit, 1/1 configuration | 2-bit, 1/1 configuration |
| Max Data Rate | 264 Mbps | 264 Mbps | 264 Mbps |
| Automotive Qualification | Yes (-Q1 automotive grade) | No (standard grade) | No (standard grade) |
| Direction | Unidirectional (fixed) | Unidirectional (fixed) | Unidirectional (fixed) |
主な差別化要因
- Automotive-qualified grade available （vs TXG4021DR)
- ±40V ground-shift tolerance without isolation （vs TXG4021DR)
- 264 Mbps data rate （vs TXG4021DR)
設計ノート
The TXG4021-Q1 is fixed-direction (unidirectional). It cannot replace a bidirectional translator on buses such as I2C or shared data lines where signal direction changes. Reserve it for one-way signaling: PWM/enable outputs, sensor status inputs, or alarm aggregation. Substituting it into a bidirectional net will latch or corrupt communication. Confirm direction per channel before layout freeze.
The ±40V rating refers to ground-level shift tolerance, not galvanic isolation. Verify that worst-case ground differential - including load-dump, fault, and surge conditions in automotive systems - remains within ±40V. Estimated: if a shared return carries 20 A through 50 milliohms of harness resistance, the ground lift is 1 V, well within rating; but crank transients can be far larger, so measure or bound the offset empirically on your harness before relying on the translator alone.
Keep the ground-shift path in mind during layout: input-side and output-side grounds intentionally sit at different potentials, so do not merge them with a local copper pour. Follow the TI datasheet layout guidance for the 8-SOIC (D) footprint, place the required decoupling capacitors close to each supply pin, and route the two translated signals away from high-dV/dt power nodes to preserve the clean edges available at 264 Mbps operation.
コンプライアンス情報
The -Q1 suffix denotes TI automotive qualification flow (AEC-Q100 qualified). RoHS, REACH, lead-free and halogen-free statuses were not stated in retrieved data; confirm on TI product page.
