2-Bits Bidirectional Level Translator, Open-Drain and Push-Pull Applications
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The LSF0102 is a 2-channel bidirectional multi-voltage level translator for open-drain and push-pull applications. This device is a universal level translator that A port operates from 0.65V to 4.5V (Vref_A) and B port 1.8V to 5.5V (Vref_B). This range allows for bidirectional voltage translations between 0.65V and 5.0V. Be aware that Vref_B is recommended to be at 1.0V 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 circuit is designed to be supplied by Vref_B via an external Rpu (pullup resistor, typ. 200kΩ) and The EN must be LOW during power-up or power-down to avoid miss operation.
Be aware that external Rpu (pull-up resistor) is required on each signal in both A and B ports for push-pull application because a pull-high state can avoid miss operation during power-up or power-down. As same as open-drain application, the smaller Rpu results in the larger driving current. For bidirectional 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) | Standard |
|---|---|
| Translation From (V) | 0.65 to 4.5 |
| Translation To (V) | 1.8 to 5.5 |
| Max Signal Rate | 100Mhz |
| Bits Needed | 2 |
| Auto Direction Sensing? | No |
| Shift | Bi-Directional |
| Prop Delay (ns) | N/A |
| Ambient or Junction Temperature (°C) | -40 to 85 |
Additional Technical Documents are available upon request:
Application information, Evaluation board, and Other technical documents
