Logic ICs
Products (2)
LSF0108QPWRQ1 - Auto 8-Ch Bidirectional Level Shifter | TI
The Texas Instruments LSF0108QPWRQ1 is an automotive-grade, 8-channel bidirectional multi-voltage level translator for open-drain and push-pull applications. It translates between voltage domains from 0.95V to 5V without a direction pin, housed in a 20-pin TSSOP (PW) package and rated for -40C to +125C operation per AEC-Q100. A level translator, or voltage level shifter, is an interface IC that enables digital communication between circuits operating at different supply voltages. It sits between a low-voltage controller, such as a 1.8V MCU, and a higher-voltage peripheral, such as a 3.3V sensor, ensuring logic levels are interpreted correctly. Level translators belong to the broader interface IC family, and the LSF family uses a pass-gate (N-MOSFET) architecture with external pull-up resistors, allowing automatic bidirectional translation without direction control. Key features include bidirectional operation with no direction pin, voltage support from 0.95V to 5V, and compatibility with both open-drain buses like I2C and push-pull signals. The device supports up to 100 MHz up-translation and greater than 100 MHz down-translation at <=30 pF load, and 40 MHz up/down translation at 50 pF load, per the TI datasheet (Rev. H). Technically, each channel uses a single N-channel MOSFET with external pull-ups defining the high level on each side. When either side drives low, the MOSFET conducts and pulls the opposite side low through the resistor network, enabling automatic bidirectional shifting. This removes GPIO overhead for direction signaling and simplifies firmware in multi-voltage systems. Typical applications include automotive body control modules, infotainment systems, MDIO management buses, and sensor interfaces where 1.8V, 2.5V, 3.3V, and 5V domains coexist, plus industrial automation mixed-voltage links. Design tip: select pull-up resistor values according to bus capacitance and speed; lower values improve edge rates but raise current consumption, and VREF pins must be tied to the respective rails to set translation levels correctly.
TXB0104QRUTRQ1 - 4-Bit Auto-Direction Level Translator | TI
The Texas Instruments TXB0104QRUTRQ1 is an automotive-qualified 4-bit bidirectional voltage-level translator with automatic direction sensing, delivered in a compact 12-pin UQFN (RUT) package measuring 1.7 mm x 2.0 mm. It translates between a 1.2 V to 3.6 V A-port supply and a 1.65 V to 5.5 V B-port supply (VCCA <= VCCB), supporting data rates up to 100 Mbps. A voltage-level translator is a logic device that interfaces digital circuits operating at different supply voltages on the same PCB, such as a 1.8 V microcontroller talking to a 3.3 V or 5 V peripheral. translators sit within the broader logic IC hierarchy as members of the voltage-translation and signal-conditioning family used in mixed-voltage embedded systems. Key features include AEC-Q100 Grade 1 qualification (-40C to +125C ambient), +/-15kV IEC ESD protection on the I/O pins, and automatic direction sensing that eliminates direction-control pins or firmware overhead. The TXB family push-pull architecture uses internal one-shot edge accelerators, giving rise and fall symmetry suited to push-pull CMOS outputs. The 12-UQFN package enables very dense layouts in space-constrained automotive modules. Typical applications include automotive body electronics and lighting, infotainment and cluster SPI/I2C-adjacent push-pull signaling, sensor interface level shifting, and general-purpose MCU-to-peripheral level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V domains. The wide 1.2 V low-side support makes it suitable for next-generation low-voltage processors. Design note: this device is intended for push-pull CMOS signals; for open-drain buses such as I2C, choose the TXS family instead. Do not add external pull-up or pull-down resistors on TXB I/O lines, as they can defeat the automatic direction sensing.