Diodes Incorporated LSF0106/LSF0108 8-Bit Bidirectional Level Shifters
Diodes Inc. LSF0106/LSF0108 8-Bit Bidirectional Level Shifters are 6-channel (LSF0106) or 8-channel (LSF0108) multi-voltage bidirectional level translators for open-drain and push-pull applications. These devices are universal level translators with an A port operating from 0.65V to 4.5V (Vref_A) and a B port operating from 1.5V to 5.5V (Vref_B). This operating 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 ideal signal integrity.
The EN pin is used to activate the devices. 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-down and -up.
Be aware that an 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 misoperation during power-up or -down. Like an open-drain application, the smaller Rpu results in the larger driving current. There is no need for a direction pin to minimize system effort for bi-directional signal flows. The Diodes Inc. LSF0106/LSF0108 supports 5V-tolerant I/O pins in various applications that require different voltage translation levels.
Features
- Bi-directional level shifter for both push-pull and open-drain
- The maximum data rate is dominated by the system capacitance and pullup resistors
- ≤100MHz; CL = 15pF, 30pF, Rpu ≤300Ω
- ≤50MHz; CL = 50pF, Rpu ≤300Ω
- Bi-directional voltage level translation between
- 65V and 1.5V, 1.8V, 2.5V, 3.3V and 5.0V
- 2V and 1.8V, 2.5V, 3.3V and 5.0V
- 8V and 2.5V, 3.3V and 5.0V
- 5V and 3.3V and 5.0V
- 3V and 5.0V
- ESD protection exceeds JESD 22
- 3500V HBM (A114)
- 1500V CDM (C101)
- Latchup exceeds 100mA per JESD 17
- 5V-tolerant I/O pins to support TTL
- Specified from -40°C to +125°C
- Lead-free and RoHS-compliant
- Halogen and antimony-free Green device
Applications
- GPIO, MDIO, SDIO, SVID, and UART
- PMBus, SMBus, I2C, and other interfaces
- Telecom infrastructures
- Industrial
- High-performance computing
- Wide array of products such as:
- PCs, networking, notebooks
- Smartphones
- Tablets
Functional Diagram
