TXS0108EPWR - 8-Bit Bidirectional Level Shifter 60Mbps | TI
部品番号: TXS0108EPWR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.05 | $1.05 |
| 10 | $0.94 | $9.40 |
| 100 | $0.76 | $76.00 |
| 500 | $0.62 | $310.00 |
| 1,000 | $0.51 | $510.00 |
TXS0108EPWR 概要
A voltage-level translator, also called a level shifter, is an integrated circuit that enables digital communication between systems operating at different voltage domains. Within the logic-translation hierarchy, bidirectional auto-direction translators such as the TXS0108E sit alongside direction-controlled families like the SN74LVC8T245 and TXB0108, providing mixed-voltage interfacing for microcontrollers, peripherals, and buses.
Key features include automatic direction sensing, which eliminates a direction-control pin, and a VCC isolation feature: if either supply rail is at GND, all I/Os enter high impedance, preventing back-powering during partial power-down. Quiescent current is low at 620 uA, and the one-shot accelerator architecture speeds low-to-high transitions for high-speed push-pull operation. The device is specified from -40C to +85C, is RoHS compliant, and carries MSL 1 (260C unlimited floor life).
Architecturally, the TXS0108E combines a pull-up based open-drain translation path with edge-accelerating one-shots, making it equally suitable for I2C-style open-drain buses and push-pull SPI/UART links. This auto-direction design trades output drive strength for bidirectionality, so it excels on lightly loaded point-to-point links rather than heavily bused systems.
Typical applications include interfacing 1.8V or 3.3V microcontrollers with 5V sensors, SD/MMC memory-card interfaces, UART/SPI/I2C bus translation, and mixed-voltage communication in consumer, industrial, and IoT systems.
Design tip: for open-drain use, external pull-up resistors are required on both sides; keep them sized per datasheet recommendations to avoid rise-time degradation at target data rates. Pricing as of 2026-08-29.
ドロップイン代替品: TXS0108EPWR — 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。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: TXS0108EPWR （同一形状・フットプリント） — 相違点: Direction Control, Output Type, Translator Type, Operating Temperature, Package.
クイック比較ツール — 並列比較する代替部品を選択:
TXS0108EQPWRQ1
✅ ドロップイン✓ 在庫あり
$0.39 / 個
データシートを見る →TXB0108PWR
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$0.26 / 個
データシートを見る →TXB0108QPWRQ1
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$0.68 / 個
データシートを見る →NXB0108PW
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
TXS0108EPWR 最大定格＆電気的特性
| 機能 | 8-bit bidirectional voltage-level translator |
| Translator Type | Voltage Level Translator, Bidirectional, 1 Circuit, 8 Channel |
| Signal Type | Open-drain and push-pull |
| VCCA Supply Range (A Port) | 1.2 V to 3.6 V |
| VCCB Supply Range (B Port) | 1.65 V to 5.5 V |
| Max Data Rate (Push-Pull) | 60 Mbps |
| Max Data Rate (Open-Drain) | 2 Mbps |
| Propagation Delay | 4.8 ns |
| 静止電流 | 620 uA |
| Direction Control | Automatic direction sensing |
| VCC Isolation | Yes - outputs high impedance if either VCC at GND |
| 動作温度 | -40C to +85C |
| パッケージ | TSSOP (PW), 20 pins |
| 実装タイプ | Surface Mount |
| MSLレベル | 1 (260C unlimited floor life) |
| RoHS ステータス | Compliant |
| OE Pin | Yes - output enable, three-state outputs |
TXS0108EPWR ピン構成
| ピン 1 | A1 — A-port data I/O 1 |
| ピン 2 | VCCA — A-port supply, 1.2V to 3.6V |
| ピン 3 | A2 — A-port data I/O 2 |
| ピン 4 | A3 — A-port data I/O 3 |
| ピン 5 | A4 — A-port data I/O 4 |
| ピン 6 | GND — Ground |
| ピン 7 | A5 — A-port data I/O 5 |
| ピン 8 | A6 — A-port data I/O 6 |
| ピン 9 | A7 — A-port data I/O 7 |
| ピン 10 | A8 — A-port data I/O 8 |
| ピン 11 | B8 — B-port data I/O 8 |
| ピン 12 | B7 — B-port data I/O 7 |
| ピン 13 | B6 — B-port data I/O 6 |
| ピン 14 | B5 — B-port data I/O 5 |
| ピン 15 | B4 — B-port data I/O 4 |
| ピン 16 | B3 — B-port data I/O 3 |
| ピン 17 | B2 — B-port data I/O 2 |
| ピン 18 | VCCB — B-port supply, 1.65V to 5.5V |
| ピン 19 | B1 — B-port data I/O 1 |
| ピン 20 | OE — Output enable; low = three-state outputs |
主な用途
TXS0108EPWR の用途: 6 件s: Mixed-Voltage MCU-to-Peripheral Interface, SD/MMC Memory Card Interface, I2C Bus Level Translation, UART and SPI Serial Link Translation, Industrial Control and PLC I/O, IoT and Consumer Mixed-Voltage Systems.
Mixed-Voltage MCU-to-Peripheral Interface
The TXS0108EPWR interfaces 1.8V or 3.3V microcontroller GPIO ports with 5V sensors and peripherals. Its auto-direction sensing eliminates direction pins, and the 1.2V-3.6V VCCA / 1.65V-5.5V VCCB ranges cover the most common mixed-domain combinations. Placed directly on the 8-bit parallel or serial bus between MCU and peripheral, the 4.8 ns propagation delay is negligible at typical GPIO speeds, while VCC isolation prevents back-powering the 5V peripheral during MCU partial power-down sequences.
おすすめ
SD/MMC Memory Card Interface
SD/MMC card interfaces require translation between a 1.8V or 3.3V host controller and card I/O. The TXS0108EPWR's 60 Mbps push-pull data rate supports high-speed SD modes, and its open-drain capability handles the card's open-drain initialization phase without a separate translator. Internal 10 kOhm pull-ups aid the CMD/DATA lines, though external pull-ups may be added for heavy bus capacitance. VCC isolation keeps card rails high-impedance when the host controller powers down the slot.
おすすめ
I2C Bus Level Translation
For I2C buses spanning 1.8V and 3.3V or 5V domains, the TXS0108EPWR supports open-drain signaling at up to 2 Mbps, exceeding Fast-mode Plus (1 Mbps). Its internal 10 kOhm pull-ups form part of the pull-up network on SDA/SCL channels, and external resistors are sized per datasheet recommendations to meet rise times at the bus capacitance. Two channels of the 8-bit device can serve SDA/SCL while remaining channels translate other mixed-voltage control lines on the same footprint.
おすすめ
UART and SPI Serial Link Translation
UART and SPI links between a 1.8V microcontroller and 3.3V or 5V peripherals use the TXS0108EPWR's push-pull mode at 60 Mbps, far above typical UART and SPI clock rates. The one-shot accelerator sharpens slow rising edges from the internal pull-up path, maintaining signal integrity across the 8 channels. Dedicated TX (A-to-B) and RX (B-to-A) channels coexist on the same device because auto-direction sensing resolves traffic direction per channel without a DIR pin.
おすすめ
Industrial Control and PLC I/O
Industrial controllers mix legacy 5V logic with modern 3.3V or 1.8V processors. The TXS0108EPWR bridges these domains on 8 parallel lines simultaneously, and its -40C to +85C operating range suits factory-floor temperature extremes. VCC isolation ensures that when either rail collapses, all outputs go high-impedance, protecting both sides during power sequencing faults. The TSSOP-20 package supports standard industrial PCB assembly with MSL 1 handling.
おすすめ
IoT and Consumer Mixed-Voltage Systems
Battery-powered IoT nodes frequently pair 1.8V low-power MCUs with 3.3V radios or sensors. The TXS0108EPWR's 620 uA quiescent current and low standby behavior fit power-constrained designs, while the 60 Mbps capability covers high-throughput sensor and display buses. The auto-direction architecture simplifies firmware since no GPIO direction control is needed, and the OE pin allows complete three-stating of the bus during deep-sleep modes to eliminate translation-path leakage.
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: TXS0108EPWR — 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 | TXS0108EQPWRQ1 | TXB0108PWR | NXB0108PW |
|---|---|---|---|---|
| Package | TSSOP-20 (PW) | TSSOP-20 (PW) - same | TSSOP-20 (PW) - same | TSSOP-20 (PW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | NXP Semiconductors |
| VCCA Range | 1.2V to 3.6V | 1.2V to 3.6V | 1.2V to 3.6V | 1.2V to 3.6V |
| VCCB Range | 1.65V to 5.5V | 1.65V to 5.5V | 1.65V to 5.5V | 1.65V to 5.5V |
| Max Data Rate (Push-Pull) | 60 Mbps | 60 Mbps | 100 Mbps | 100 Mbps |
| Open-Drain Support | Yes (2 Mbps) | Yes (2 Mbps) | No | Limited |
| Automotive Grade | No | Yes (AEC-Q100) | No | No |
| Quiescent Current | 620 uA | 620 uA | 4 uA | 6 uA |
| Internal Pull-Ups | 10 kOhm on all I/O | 10 kOhm | Weak (one-shot only) | Weak |
主な差別化要因
- Open-drain and push-pull capability in one device （vs TXB0108PWR)
- Automotive drop-in upgrade available （vs TXS0108EQPWRQ1)
- One-shot edge acceleration （vs NXB0108PW)
設計ノート
The TXS0108E's internal 10 kOhm pull-ups combine with external pull-up resistors on open-drain buses; the effective resistance is the parallel combination, which increases static current on I2C lines pulled low. Do not use the TXS0108E in heavily loaded or multi-drop buses where bus contention can exceed its weak output drive - use a direction-controlled translator such as SN74LVC8T245 for those topologies.
Tie OE through a pull-down resistor (about 10 kOhm) to GND so outputs remain three-stated during power-up until both VCCA and VCCB are stable. The VCC isolation feature protects against back-powering when one rail is at GND, but sequencing OE after both rails prevents transient glitches on the bus during startup.
Place 0.1 uF ceramic decoupling capacitors within 2 mm of both VCCA and VCCB pins to ground. Because the one-shot accelerator drives fast edges, keep series traces short (<50 mm) and maintain a solid ground plane to control ringing on 60 Mbps push-pull channels. For open-drain channels, compute external pull-up values from total bus capacitance to meet rise-time targets at 2 Mbps.
コンプライアンス情報
RoHS compliant per PartGenie compliance data (RoHS Yes, MSL 1-260C-UNLIM). Not AEC-Q100 qualified; use TXS0108EQPWRQ1 for automotive.
