LSF0108PWR - 8-Ch Bidirectional Level Translator | TI
MPN: LSF0108PWR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.31 | $0.31 |
| 10 | $0.28 | $2.80 |
| 100 | $0.25 | $25.00 |
| 500 | $0.22 | $110.00 |
| 1,000 | $0.2 | $200.00 |
Drop-in alternatives for LSF0108PWR — 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:
TXS0108EPWR
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →LSF0108PW-Q100J
✅ Drop-In📋 Reference alternative (not in catalog)
TXB0108PWR
✅ Drop-In✓ In Stock
$0.39 / Unit
View Datasheet →LSF0108PWR Maximum Ratings & Electrical Characteristics
| Number of Channels | 8 |
| Input Voltage Range (A-side) | 0 V to 5 V |
| Input Voltage Range (B-side) | 0 V to 5 V |
| Propagation Delay | 1.5 ns (typical) |
| Operating Temperature Range | -40°C to 125°C |
| Package Type | TSSOP-20 (PW) |
| Mounting Type | Surface Mount |
| Supply Voltage (Vref_A) | 0 V to 5 V |
| Supply Voltage (Vref_B) | 0 V to 5 V |
| Direction Control | None (auto-bidirectional) |
| Open-Drain Support | Yes |
| Push-Pull Support | Yes |
| 5V Tolerant I/O | Yes |
| Quiescent Current | [DATA_NEEDED: Quiescent current] |
| RoHS Status | Compliant |
LSF0108PWR Pin Configuration
| Pin 1 | A1 — A-side channel 1 |
| Pin 2 | A2 — A-side channel 2 |
| Pin 3 | A3 — A-side channel 3 |
| Pin 4 | A4 — A-side channel 4 |
| Pin 5 | A5 — A-side channel 5 |
| Pin 6 | A6 — A-side channel 6 |
| Pin 7 | A7 — A-side channel 7 |
| Pin 8 | A8 — A-side channel 8 |
| Pin 9 | GND — Ground |
| Pin 10 | Vref_A — Reference voltage for A-side |
| Pin 11 | EN — Enable (active high) |
| Pin 12 | Vref_B — Reference voltage for B-side |
| Pin 13 | B8 — B-side channel 8 |
| Pin 14 | B7 — B-side channel 7 |
| Pin 15 | B6 — B-side channel 6 |
| Pin 16 | B5 — B-side channel 5 |
| Pin 17 | B4 — B-side channel 4 |
| Pin 18 | B3 — B-side channel 3 |
| Pin 19 | B2 — B-side channel 2 |
| Pin 20 | B1 — B-side channel 1 |
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
LSF0108PWR is suitable for 6 applications: I2C Bus Level Shifting, UART Interfacing, SPI Communication, Multi-Voltage Sensor Interfacing, Memory and Logic Level Translation, Industrial Control Systems.
I2C Bus Level Shifting
The LSF0108PWR is ideal for I2C bus level shifting between different voltage domains, such as 1.8V and 3.3V or 5V. Its auto-bidirectional capability and open-drain support make it perfect for I2C communication. With a propagation delay of 1.5 ns, it ensures reliable data transfer at standard and fast-mode speeds. External pull-up resistors are required on both sides, connected to the respective voltage rails. The device's 8 channels allow multiple I2C devices to be connected, simplifying mixed-voltage system design.
Recommended
UART Interfacing
The LSF0108PWR is well-suited for UART interfacing between microcontrollers and peripherals operating at different voltage levels. Its auto-bidirectional feature eliminates the need for direction control, simplifying firmware and hardware design. The device supports both open-drain and push-pull signals, making it versatile for various UART implementations. With a wide voltage range of 0V to 5V, it can handle common logic levels like 3.3V and 5V. The fast propagation delay ensures minimal signal distortion in high-speed UART communication.
Recommended
SPI Communication
The LSF0108PWR can be used for SPI communication between devices with different voltage domains, such as a 3.3V microcontroller and a 5V sensor. Its push-pull support and fast propagation delay of 1.5 ns make it suitable for SPI clock rates up to several MHz. The device's 8 channels can accommodate the MOSI, MISO, SCK, and chip select lines, reducing the number of level shifters needed. External pull-up resistors are not required for push-pull signals, simplifying the design. The wide operating temperature range of -40°C to 125°C ensures reliable operation in industrial environments.
Recommended
Multi-Voltage Sensor Interfacing
The LSF0108PWR is ideal for interfacing sensors that operate at different voltage levels, such as a 5V analog sensor with a 3.3V microcontroller. Its wide voltage range of 0V to 5V allows seamless integration of various sensors. The device supports both open-drain and push-pull outputs, accommodating different sensor types. With 8 channels, it can handle multiple sensor signals simultaneously, reducing component count. The auto-bidirectional feature simplifies design, as no direction control is needed. This makes the LSF0108PWR a versatile solution for multi-voltage sensor systems.
Recommended
Memory and Logic Level Translation
The LSF0108PWR is used to translate voltage levels between memory devices and logic ICs operating at different voltages. For example, it can interface a 5V EEPROM with a 3.3V microcontroller. Its bidirectional capability allows read and write operations without direction control. The device supports both open-drain and push-pull signals, making it compatible with various memory interfaces like I2C and SPI. The fast propagation delay ensures reliable data transfer. The wide operating temperature range makes it suitable for industrial memory applications.
Recommended
Industrial Control Systems
The LSF0108PWR is widely used in industrial control systems where different voltage domains coexist, such as 24V PLCs and 3.3V microcontrollers. Its wide voltage range and robust operating temperature of -40°C to 125°C make it suitable for harsh environments. The device's auto-bidirectional feature simplifies wiring and reduces the number of control lines. It supports both open-drain and push-pull signals, accommodating various industrial sensors and actuators. The 8-channel capacity allows multiple signals to be translated in a single IC, saving board space and cost.
Recommended
Recommended Products Summary
Engineering reference data for LSF0108PWR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TXS0108EPWR | LSF0108PW-Q100J | TXB0108PWR |
|---|---|---|---|---|
| Package | TSSOP-20 (PW) | TSSOP-20 (PW) - same | TSSOP-20 (PW) - same | TSSOP-20 (PW) - same |
| Brand | Texas Instruments | Texas Instruments | Nexperia | Texas Instruments |
| Number of Channels | 8 | 8 | 8 | 8 |
| Direction Control | None (auto-bidirectional) | None (auto-bidirectional) | None (auto-bidirectional) | Direction control pin |
| Integrated Pull-up Resistors | No (external required) | Yes | No (external required) | No (external required) |
| Propagation Delay | 1.5 ns | 1.5 ns | 1.5 ns | 1.5 ns |
| Operating Temperature Range | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C |
| Automotive Grade | No | No | Yes (AEC-Q100) | No |
Key Differentiators
- Auto-bidirectional without direction pin (vs TXB0108PWR)
- Lower cost due to external pull-ups (vs TXS0108EPWR)
- Automotive-grade option available (vs LSF0108PW-Q100J)
Design Notes
Place external pull-up resistors close to the LSF0108PWR pins to minimize parasitic inductance and ensure signal integrity. For I2C applications, typical pull-up values range from 1kΩ to 10kΩ depending on bus capacitance and speed. Use 1% tolerance resistors for accurate voltage levels.
Ensure Vref_A and Vref_B are properly decoupled with 0.1µF capacitors placed close to the pins. The reference voltages must be stable and within the specified range (0V to 5V) to ensure correct level shifting. Avoid noise on these rails as it can affect signal integrity.
Do not exceed the absolute maximum ratings for voltage on any pin. The LSF0108PWR is 5V tolerant, but applying voltages above 5V can damage the device. Also, ensure that the EN pin is tied high for normal operation; leaving it floating may cause unpredictable behavior.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified; automotive variant is LSF0108PW-Q100J from Nexperia.
