8-Bit Bi-Directional Level Shifter with Automatic Direction Sensing for Push-Pull and Open-Drain Applications
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The LSF0106Q/0108Q is 6/8-CH bi-directional multi-voltage level translator for open-drain and push-pull applications. This device is a universal level translator with A port operating from 0.65V to 4.5V (Vref_A) and B port 1.5V to 5.5V (Vref_B). This range allows for bidirectional voltage translations between 0.65V and 5.0V. Meanwhile, Vref_B is recommended to be at 1V higher than Vref_A for best signal integrity.
The EN pin is used to activate the device. When EN is HIGH, the translator switch is on. Otherwise, EN is LOW, the translator switch is off, and a high-impedance state exists between ports. The EN input must be connected to Vref_B and both pins pulled to HIGH through a pullup resistor (typically 200kΩ). EN must be LOW to ensure the high-impedance state during power-up or power-down.
Be aware that external Rpu (pullup resistor) is required on each signal in both A and B ports for push-pull application because a pull-high state can avoid misoperation during power-up or power-down. As same as open-drain application, the smaller Rpu results in the larger driving current. For bi-directional signal flows, there is no need for a direction pin to minimize system effort. This device supports 5V tolerant I/O pins in a variety of applications which require different voltage translation levels.
| Compliance (Only Automotive supports PPAP) | Automotive |
|---|---|
| Translation From (V) | 0.65 to 4.5 |
| Translation To (V) | 1.5 to 5.5 |
| Max Signal Rate | 100MHz |
| Bits Needed | 8 |
| Auto Direction Sensing? | No |
| Shift | Bi-Directional |
| Prop Delay (ns) | 0.1 |
| Ambient or Junction Temperature (°C) | -40 to 125 |
Additional Technical Documents are available upon request:
Application information, Evaluation board, and Other technical documents
