LSF0102DDFR - 2-Ch Bidirectional Level Translator | TI
MPN: LSF0102DDFR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.55 | $0.55 |
| 10 | $0.48 | $4.80 |
| 100 | $0.39 | $39.00 |
| 500 | $0.32 | $160.00 |
| 1,000 | $0.28 | $280.00 |
Drop-in alternatives for LSF0102DDFR — 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:
TXB0102DDFR
✅ Drop-In📋 Reference alternative (not in catalog)
SN74LVC2T45DDFR
✅ Drop-In📋 Reference alternative (not in catalog)
TXS0102DDFR
✅ Drop-In📋 Reference alternative (not in catalog)
LSF0102DDFR Maximum Ratings & Electrical Characteristics
| Number of Channels | 2 |
| Circuit Type | Bidirectional |
| Voltage - VCCA | 0.95 V to 4.5 V |
| Voltage - VCCB | 1.8 V to 5.5 V |
| Data Rate | 100 Mbps |
| Operating Temperature Range | -40°C to +125°C |
| Package / Case | TSOT-23-8 (DDF) |
| Mounting Type | Surface Mount |
| Output Type | Open Drain, Push-Pull |
| Input Type | TTL |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Number of Circuits | 1 |
| RoHS Status | Compliant |
| Moisture Sensitivity Level (MSL) | 1 |
| Propagation Delay | [DATA_NEEDED: Propagation Delay] |
LSF0102DDFR Pin Configuration
| Pin 1 | VREF_A — Reference voltage for A-side (low-voltage side) |
| Pin 2 | A1 — Data I/O for channel 1 on A-side |
| Pin 3 | A2 — Data I/O for channel 2 on A-side |
| Pin 4 | GND — Ground |
| Pin 5 | B2 — Data I/O for channel 2 on B-side |
| Pin 6 | B1 — Data I/O for channel 1 on B-side |
| Pin 7 | VREF_B — Reference voltage for B-side (high-voltage side) |
| Pin 8 | EN — Enable (active high) |
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
LSF0102DDFR is suitable for 6 applications: I2C Bus Level Shifting, SPI and UART Interfaces, GPIO Level Translation, Battery-Powered Devices, Industrial Control Systems, Consumer Electronics.
I2C Bus Level Shifting
The LSF0102DDFR is ideal for I2C bus level shifting between different voltage domains, such as 1.8V and 3.3V or 5V. Its open-drain support and auto-direction sensing make it perfect for bidirectional I2C communication. The device's low quiescent current and small package are beneficial for space-constrained designs. With data rates up to 100 Mbps, it easily handles standard and fast-mode I2C. The external pull-up resistors allow tuning of rise times and power consumption. This application is common in mixed-voltage systems where sensors, microcontrollers, and peripherals operate at different supply voltages.
Recommended
SPI and UART Interfaces
The LSF0102DDFR supports push-pull signals, making it suitable for SPI and UART interfaces that need level translation between different voltage domains. Its 100 Mbps data rate accommodates high-speed SPI clocks and UART baud rates. The auto-direction sensing eliminates the need for a direction pin, simplifying the design. The device's wide voltage range (0.95V to 5V) allows interfacing between low-voltage logic and legacy 5V peripherals. This is particularly useful in embedded systems with mixed-voltage components, such as microcontrollers and external memory or sensors.
Recommended
GPIO Level Translation
The LSF0102DDFR can be used to translate GPIO signals between different voltage domains, enabling communication between a 3.3V microcontroller and 5V peripherals. Its bidirectional capability allows both input and output signals to be translated without direction control. The device's small TSOT-23-8 package is ideal for compact designs. The wide operating temperature range (-40°C to +125°C) makes it suitable for industrial applications. This application is common in automation, robotics, and consumer electronics where multiple voltage domains coexist.
Recommended
Battery-Powered Devices
The LSF0102DDFR's low power consumption and wide voltage range make it suitable for battery-powered devices that need to interface between different voltage domains. The device's quiescent current is minimal, extending battery life. Its small package is ideal for portable electronics like wearables and IoT sensors. The auto-direction sensing simplifies firmware and hardware design. The device supports both open-drain and push-pull signals, making it versatile for various sensor interfaces. This application is critical in IoT devices where power efficiency is paramount.
Recommended
Industrial Control Systems
The LSF0102DDFR operates over a wide temperature range (-40°C to +125°C), making it suitable for industrial control systems that experience harsh environments. It can translate signals between different voltage domains in PLCs, motor drives, and sensors. The device's robust design ensures reliable operation in noisy industrial environments. Its small package allows for high-density PCB layouts. The auto-direction sensing reduces the number of control lines needed, simplifying wiring and reducing cost. This application is common in factory automation and process control.
Recommended
Consumer Electronics
The LSF0102DDFR is used in consumer electronics to interface between different voltage domains, such as a 1.8V application processor and 3.3V peripherals. Its small package and low power consumption are ideal for smartphones, tablets, and wearables. The device supports high-speed data rates up to 100 Mbps, suitable for camera sensors and display interfaces. The auto-direction sensing simplifies design and reduces component count. This application is common in devices with multiple voltage rails, such as audio codecs, touch controllers, and memory cards.
Recommended
Recommended Products Summary
Engineering reference data for LSF0102DDFR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TXB0102DDFR | SN74LVC2T45DDFR | TXS0102DDFR |
|---|---|---|---|---|
| Package | TSOT-23-8 (DDF) | TSOT-23-8 (DDF) | TSOT-23-8 (DDF) | TSOT-23-8 (DDF) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Channels | 2 | 2 | 2 | 2 |
| Direction Control | Auto-bidirectional | Auto-bidirectional | Direction pin | Auto-bidirectional |
| Voltage Range (VCCA) | 0.95V to 4.5V | 1.2V to 3.6V | 1.65V to 5.5V | 1.2V to 3.6V |
| Voltage Range (VCCB) | 1.8V to 5.5V | 1.65V to 5.5V | 1.65V to 5.5V | 1.65V to 5.5V |
| Data Rate | 100 Mbps | 100 Mbps | 420 Mbps | 24 Mbps |
| Open-Drain Support | Yes | No | No | Yes |
Key Differentiators
- Supports both open-drain and push-pull signals (vs TXB0102DDFR)
- Wider voltage range down to 0.95V (vs TXB0102DDFR)
- Auto-direction sensing without direction pin (vs SN74LVC2T45DDFR)
Design Notes
Place pull-up resistors on both A and B sides as close to the LSF0102DDFR as possible. The pull-up resistors should be connected to the respective VREF voltages. For I2C applications, typical values are 10kΩ for 100kHz and 2kΩ for 400kHz. Ensure the PCB traces are short to minimize parasitic capacitance and maintain signal integrity.
The LSF0102DDFR requires external pull-up resistors for operation. The value of these resistors affects the maximum data rate and power consumption. Lower resistance values increase speed but also increase power dissipation. For battery-powered applications, use higher resistance values to reduce power consumption, but ensure they are low enough to meet the required rise times.
Do not connect the VREF_A and VREF_B pins to the same voltage. The device requires VREF_A to be lower than VREF_B for proper operation. Also, ensure that the pull-up resistors are connected to the correct supply voltages, not to the VREF pins directly. Incorrect wiring can cause the device to malfunction or damage the connected components.
Compliance Information
RoHS compliant per JLCPCB listing. AEC-Q100 not applicable for this non-automotive part.
