TXS0102-Q1 - 2-Bit Auto-Direction Level Translator | TI
MPN: TXS0102-Q1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.2 | $1.20 |
| 10 | $1.02 | $10.20 |
| 100 | $0.78 | $78.00 |
| 500 | $0.62 | $310.00 |
| 1,000 | $0.51 | $510.00 |
Drop-in alternatives for TXS0102-Q1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TXS0102DCUR
β Drop-Inβ In Stock
$0.14 / Unit
View Datasheet βTXB0102DCUR
β Drop-Inπ Reference alternative (not in catalog)
LSF0102DCUR
β‘ Same Packageπ Reference alternative (not in catalog)
PCA9306DCUR
β‘ Same Packageπ Reference alternative (not in catalog)
ETF0102
β‘ Same Packageπ Reference alternative (not in catalog)
TXS0102-Q1 Maximum Ratings & Electrical Characteristics
| Function | 2-bit bidirectional voltage-level translator |
| Translator Type | Open-drain and push-pull, auto-direction |
| Channels | 2 |
| Data Rate | 24 Mbps |
| VCCA Supply Range | 1.2 V to 3.6 V |
| VCCB Supply Range | 1.65 V to 5.5 V |
| Output Enable | Yes (OE referenced to VCCA, active high) |
| Pull-up Resistors | Internal 10 kOhm on I/Os |
| High-Impedance State | Yes (OE low) |
| Package | 8-VSSOP (DCU) |
| Mounting Type | Surface Mount |
| Qualification | AEC-Q100 automotive grade |
| Operating Temperature | -40C to +125C |
| RoHS Status | Compliant |
| Applications | I2C, SMBus, UART, GPIO level translation |
TXS0102-Q1 Pin Configuration
| Pin 1 | A1 β A-port data I/O 1 |
| Pin 2 | VCCA β A-port supply, 1.2V to 3.6V; powers OE input circuit |
| Pin 3 | GND β Ground |
| Pin 4 | B2 β B-port data I/O 2 |
| Pin 5 | B1 β B-port data I/O 1 |
| Pin 6 | OE β Output enable, referenced to VCCA; low = high impedance |
| Pin 7 | VCCB β B-port supply, 1.65V to 5.5V |
| Pin 8 | A2 β A-port data I/O 2 |
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
TXS0102-Q1 is suitable for 6 applications: Automotive I2C Level Translation, MCU-to-Peripheral GPIO Bridging, UART Interface Translation, Sensor Interface Level Shifting, Infotainment and Display Control, Battery Management System (BMS) Communications.
Automotive I2C Level Translation
The TXS0102-Q1 fits automotive I2C buses bridging a 1.8V or 3.3V MCU to 5V sensors and EEPROMs because its internal 10 kOhm pull-ups and open-drain support match the shared-bus topology without external FETs or pull-up sizing. Placed between the MCU SDA/SCL pair and the peripheral rail, it auto-directions traffic at up to 24 Mbps, far beyond 400 kHz Fast-mode I2C. AEC-Q100 qualification and -40C to +125C operation cover under-hood and body-electronics environments.
Recommended
MCU-to-Peripheral GPIO Bridging
In mixed-voltage boards, a 1.2V or 1.8V MCU GPIO pair can drive 3.3V or 5V indicators and inputs through the TXS0102-Q1. The auto-direction architecture means no MCU pin is spent on a DIR signal, and the OE pin allows the GPIO banks to float safely during boot when sequenced from VCCA. Push-pull support lets the 10 kOhm pull-ups be overridden by active drivers, making this suitable for status lines, enables, and low-speed control signals up to 24 Mbps.
Recommended
UART Interface Translation
UART TX and RX form a natural 2-bit push-pull pair for the TXS0102-Q1, translating a 1.8V automotive MCU console to a 3.3V or 5V telematics modem. Because UART lines are point-to-point driven, the internal pull-ups cause no contention, and the 24 Mbps rating exceeds standard UART rates (up to 3-6 Mbaud). The OE pin referenced to VCCA ensures the lines are high-impedance until the MCU rail is up, preventing bus fights during power sequencing.
Recommended
Sensor Interface Level Shifting
Analog-front-end and sensor modules frequently run 3.3V digital interfaces while host MCUs drop to 1.8V for power savings. The TXS0102-Q1 translates the two-wire sensor control/data pair (such as I2C or a clock/data pair) between these domains. Its open-drain tolerance makes it safe for shared alert and ready lines, and AEC-Q100 qualification permits placement in camera, radar, and battery-management sensor harnesses where automotive reliability screening is mandatory.
Recommended
Infotainment and Display Control
Cluster and infotainment modules mix 1.8V SoC GPIO domains with 3.3V or 5V display, backlight, and touch-controller interfaces. The TXS0102-Q1 provides a compact 2-bit bridge for I2C touch-panel control or configuration lines, keeping the design small in the DCU package. Its high-impedance OE state protects the display connector during module power cycling, and 24 Mbps headroom supports configuration updates without constraining bus timing.
Recommended
Battery Management System (BMS) Communications
BMS stack controllers often run 1.8V logic while monitoring ICs and isolation interfaces use 3.3V or 5V digital levels. The TXS0102-Q1 bridges the I2C/SMBus or status pair between these domains. Its tolerance of open-drain shared buses suits multi-drop monitoring links, and the automotive temperature range plus AEC-Q100 rating match the under-hood and in-pack environments where BMS electronics operate over -40C to +125C.
Recommended
Recommended Products Summary
Engineering reference data for TXS0102-Q1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TXS0102DCUR | TXB0102DCUR | LSF0102DCUR |
|---|---|---|---|---|
| Package | 8-VSSOP (DCU) | 8-VSSOP (DCU) - same | 8-VSSOP (DCU) - same | 8-VSSOP (DCU) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Automotive Qualification | AEC-Q100 qualified | No (standard grade) | [DATA_NEEDED] | [DATA_NEEDED] |
| Data Rate | 24 Mbps | 24 Mbps | 24 Mbps | [DATA_NEEDED] |
| Internal Pull-ups | 10 kOhm per I/O | 10 kOhm per I/O | None | None (external required) |
| Open-Drain Support | Yes (I2C/SMBus) | Yes | No (push-pull only) | Yes |
| Direction Control | Auto-direction + OE pin | Auto-direction + OE pin | Auto-direction + OE | Passive switch + EN |
| VCCA Range | 1.2V to 3.6V | 1.2V to 3.6V | 1.2V to 3.6V | 0.95V to 3.6V |
| Pin-to-Pin Compatible | - | Yes (drop-in) | Yes | No - verify pinout |
Key Differentiators
- Automotive AEC-Q100 qualification (vs TXS0102DCUR)
- Open-drain bus support with internal 10 kOhm pull-ups (vs TXB0102DCUR)
- True auto-direction operation (vs LSF0102DCUR)
Design Notes
Observe power sequencing guidance: VCCA powers the OE input circuit, so if VCCA is absent OE must be held low to keep outputs high-impedance. TI's product documentation explicitly recommends tying OE to GND through a pull-down resistor (value set by the driver's current-sourcing capability) to guarantee high-Z during power-up or power-down. Sequence VCCA before or together with VCCB for predictable I/O states.
The internal 10 kOhm pull-ups on every I/O mean rise time is set by pull-up resistance times bus capacitance. On I2C Fast-mode (400 kHz) buses with 200 pF load, the 10 kOhm pull-up gives roughly 2 us RC rise, potentially violating the 300 ns specification; add external parallel pull-ups (e.g., 1-2 kOhm) on the bus if needed, or use external pull-ups exclusively on push-pull-driven nets.
Do not substitute cross-brand SOIC-8 or VSSOP-8 level shifters without checking pinout: a TI E2E forum thread confirms TXS0102QDCURQ1 does not share the pinout of onsemi NLVSX4373DR2G despite both being 8-pin packages. Also remember the TXS (open-drain capable) and TXB (push-pull only) families are not functionally interchangeable on shared buses like I2C.
Place 0.1 uF ceramic decoupling capacitors within 2 mm of both VCCA and VCCB pins to the nearest ground. Keep the A-side and B-side traces short and matched for the signal pair to minimize skew; the DCU footprint allows routing both channels side-by-side. No thermal pad is present, so standard SMD reflow profiles apply.
Compliance Information
AEC-Q100 automotive qualification per TI product page. RoHS/lead-free status per standard TI catalog practice; detailed REACH and halogen data [DATA_NEEDED: REACH/halogen-free certificate].
