TXS0108EPWR - 8-Bit Bidirectional Level Shifter 60Mbps | TI
MPN: TXS0108EPWR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.89 | $0.89 |
| 10 | $0.8 | $8.00 |
| 100 | $0.62 | $62.00 |
| 500 | $0.51 | $255.00 |
| 1,000 | $0.42 | $420.00 |
Drop-in alternatives for TXS0108EPWR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TXS0108EQPWRQ1
✅ Drop-In✓ In Stock
$0.39 / Unit
View Datasheet →TXB0108QPWRQ1
✅ Drop-In✓ In Stock
$0.68 / Unit
View Datasheet →TXB0108PWR
✅ Drop-In✓ In Stock
$0.18 / Unit
View Datasheet →SN74LVC8T245PWR
⚡ Same Package✓ In Stock
$0.36 / Unit
View Datasheet →TXS0108EPWR Maximum Ratings & Electrical Characteristics
| Function | 8-bit bidirectional voltage-level translator |
| Signal Type | Open-drain and push-pull |
| VCCA Range (A Port) | 1.2 V to 3.6 V |
| VCCB Range (B Port) | 1.65 V to 5.5 V |
| Data Rate (Push-Pull) | 60 Mbps |
| Data Rate (Open-Drain) | 2 Mbps |
| Direction Control | Automatic (auto-direction sensing) |
| Quiescent Current | 620 uA |
| VCC Isolation | Yes - all I/O Hi-Z if either VCC at GND |
| Operating Temperature | -40C to +85C |
| Package | TSSOP-20 (PW) |
| Pins | 20 |
| Mounting Type | Surface Mount |
| MSL Level | 1 (260C unlimited) |
| RoHS Status | Compliant |
| Supply Voltage (typical) | 2.5 V |
TXS0108EPWR Pin Configuration
| Pin 1 | A1 — A-port data 1 (VCCA domain) |
| Pin 2 | A2 — A-port data 2 |
| Pin 3 | A3 — A-port data 3 |
| Pin 4 | A4 — A-port data 4 |
| Pin 5 | A5 — A-port data 5 |
| Pin 6 | A6 — A-port data 6 |
| Pin 7 | A7 — A-port data 7 |
| Pin 8 | A8 — A-port data 8 |
| Pin 9 | GND — Ground |
| Pin 10 | B8 — B-port data 8 (VCCB domain) |
| Pin 11 | B7 — B-port data 7 |
| Pin 12 | B6 — B-port data 6 |
| Pin 13 | B5 — B-port data 5 |
| Pin 14 | B4 — B-port data 4 |
| Pin 15 | B3 — B-port data 3 |
| Pin 16 | B2 — B-port data 2 |
| Pin 17 | B1 — B-port data 1 |
| Pin 18 | OE — Output enable (active high; tie to VCCA for always-on) |
| Pin 19 | VCCA — A-port supply, 1.2V-3.6V |
| Pin 20 | VCCB — B-port supply, 1.65V-5.5V |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TXS0108EPWR is suitable for 6 applications: MCU to 5V Sensor Interface, SD/MMC Memory Card Interface, I2C Bus Level Translation, UART and SPI Mixed-Voltage Links, Industrial Mixed-Voltage Automation Systems, IoT and Consumer Mixed-Domain Boards.
MCU to 5V Sensor Interface
The TXS0108EPWR is ideal for connecting 1.8V or 3.3V microcontrollers to 5V sensors and peripherals. Its VCCA range of 1.2V-3.6V and VCCB range of 1.65V-5.5V directly bridge the most common voltage mismatch in embedded systems, while auto-direction sensing eliminates DIR-pin firmware overhead. Placed on 8 parallel signal lines with 620 uA quiescent current, it adds negligible power budget. For push-pull sensor interfaces it sustains 60 Mbps, far exceeding typical sensor update rates, and the VCC isolation feature protects the low-voltage MCU during partial power-down sequences.
Recommended
SD/MMC Memory Card Interface
SD and MMC cards historically operate at 3.3V while modern controllers run at 1.8V; the TXS0108EPWR's 8-bit width matches the 4-bit data + CMD/CLK bus structure of SD interfaces. Its one-shot accelerators quickly drive edges through card connectors and capacitance, maintaining timing at the 50 MHz (High Speed) SD clock regime on push-pull lines. The auto-direction feature suits the bidirectional CMD line without a direction-control signal, and the VCC isolation Hi-Z state prevents back-powering the card when the host controller is powered down, a common failure mode in removable-media designs.
Recommended
I2C Bus Level Translation
The TXS0108EPWR supports open-drain signaling at up to 2 Mbps, comfortably covering Fast-mode Plus (1 Mbps) I2C. Its pull-up based translation path is compatible with external pull-up resistors on SDA/SCL on both sides, and the one-shot accelerators sharpen rising edges that would otherwise be slowed by bus capacitance. Engineers should size pull-ups per TI datasheet SCPS191 recommendations to keep rise times within spec. Compared with dedicated 2-channel I2C translators, the 8-bit width allows translating multiple I2C buses or combining I2C with other signals on one IC, saving board area.
Recommended
UART and SPI Mixed-Voltage Links
For point-to-point UART or SPI links between a 1.8V processor and 3.3V or 5V peripherals, the TXS0108EPWR provides 60 Mbps push-pull throughput, well beyond standard UART rates (up to 12 Mbps) and typical SPI clocks. The auto-direction design handles per-pin bidirectionality on SPI MOSI/MISO without DIR control, simplifying layout. Because the TXS architecture trades drive strength for bidirectionality, it performs best on lightly loaded point-to-point traces; keep series resistance and trace capacitance low to preserve the 4.8 ns-class transition times at maximum data rates.
Recommended
Industrial Mixed-Voltage Automation Systems
Industrial control systems routinely mix legacy 5V logic with modern 3.3V or 1.8V controllers. The TXS0108EPWR's -40C to +85C operating range and VCC isolation feature make it suitable for factory automation I/O boards, where power sequencing between subsystems is unpredictable. If either rail collapses, all eight channels enter high impedance, preventing latch-up or back-feeding into a dead rail. Its RoHS compliance and MSL 1 rating (260C unlimited floor life) simplify high-volume reflow assembly, while the active lifecycle status ensures long-term sourcing for multi-year industrial product cycles.
Recommended
IoT and Consumer Mixed-Domain Boards
IoT products combine low-voltage wireless SoCs (1.8V typical) with 3.3V sensors and 5V legacy peripherals; the TXS0108EPWR bridges up to eight such signals in one 20-pin TSSOP, minimizing BOM count versus discrete transistor shifters. The 620 uA quiescent current is acceptable for mains-powered nodes, and outputs go Hi-Z during sleep/power-down via VCC isolation. For push-pull links to displays or touch controllers it supports 60 Mbps, and for open-drain touch or interrupt lines it handles 2 Mbps, covering the full signal mix of a typical consumer IoT mainboard with a single translator IC.
Recommended
Recommended Products Summary
Engineering reference data for TXS0108EPWR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TXS0108EQPWRQ1 | TXB0108QPWRQ1 | TXB0108PWR | TXS0108ERGYR | SN74LVC8T245PWR |
|---|---|---|---|---|---|---|
| Package | TSSOP-20 (PW) | TSSOP-20 (PW) - same | TSSOP-20 (PW) - same | TSSOP-20 (PW) - same | UFBGA-20 - different | TSSOP-20 (PW) - same footprint, different pinout |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Channels | 8-bit bidirectional | 8-bit | 8-bit | 8-bit | 8-bit | 8-bit |
| Push-Pull Data Rate | 60 Mbps | 60 Mbps | 100 Mbps | 100 Mbps | 60 Mbps | [DATA_NEEDED] |
| Open-Drain Support | Yes (2 Mbps) | Yes (2 Mbps) | No - push-pull only | No - push-pull only | Yes (2 Mbps) | Push-pull only |
| VCCA Range | 1.2V-3.6V | 1.2V-3.6V | 1.2V-3.6V | 1.2V-3.6V | 1.2V-3.6V | 1.65V-3.6V |
| Direction Control | Automatic | Automatic | Automatic | Automatic | Automatic | DIR + OE pins |
| Automotive Grade (AEC-Q100) | No (commercial) | Yes | Yes | No | [DATA_NEEDED] | No (Q1 variant exists) |
| Quiescent Current | 620 uA | 620 uA | 4 uA | 4 uA | 620 uA | [DATA_NEEDED] |
Key Differentiators
- Open-drain and push-pull support in one IC (vs TXB0108PWR)
- Automotive drop-in upgrade path (vs TXS0108EQPWRQ1)
- Auto-direction sensing saves pins and firmware (vs SN74LVC8T245PWR)
- VCC isolation for partial power-down (vs TXB0108PWR)
Design Notes
For open-drain (I2C) use, external pull-up resistors are mandatory on both A and B sides. Oversized pull-ups degrade rise time and cap the achievable rate well below the 2 Mbps open-drain limit; undersized values waste current. The TXS one-shot accelerators can also produce short glitches on heavily capacitive buses - keep bus capacitance within datasheet limits. Never leave OE floating; tie it to VCCA through a pull-up if always-on operation is desired.
Decouple VCCA and VCCB each with 0.1 uF ceramic capacitors placed within 2 mm of the pins, plus bulk capacitance on each rail. VCCA must power up before or with VCCB to avoid undefined states, although VCC isolation ensures Hi-Z outputs if either rail is grounded. The 620 uA quiescent current is per-device; for battery designs consider the TXB0108 (4 uA) if open-drain support is not needed.
The auto-direction architecture senses direction from drive strength, so keep each channel point-to-point. Do not connect multiple drivers to a single translated line, and avoid heavy resistive loads (below ~50 kohm pull-ups) that can confuse the direction sensors. Keep traces short; the 60 Mbps push-pull rating assumes the light loading typical of point-to-point links. Unused channels may be left unconnected but per TI E2E guidance, confirm termination on unused A/B pins during design review.
The TSSOP-20 (PW) footprint supports direct drop-in of TXB0108PWR and TXS0108EQPWRQ1, so consider dual-footprint layout flexibility for sourcing resilience. Route VCCA-domain and VCCB-domain traces to separate rail planes to minimize crosstalk between translated domains. MSL 1 with 260C unlimited floor life allows standard reflow profiles without bake handling.
Compliance Information
RoHS compliant and MSL 1 per distributor data (PartGenie, DigiKey). AEC-Q100 applies only to the TXS0108EQPWRQ1 variant, not this commercial part.
