Overview
The ST2378E device, produced by STMicroelectronics, is an 8-bit, dual supply, bidirectional level translator designed to facilitate data transfer between low voltage ASICs/PLDs and higher voltage systems. It operates within a wide voltage range of 1.71 V to 5.5 V for both VL and VCC, with VCC required to be higher than VL for proper operation. This device features a transmission-gate-based design, enabling bidirectional asynchronous data transfer without the need for a direction pin. It also includes ±15 kV ESD protection on I/Os at the VCC side and supports a guaranteed data rate of 13 Mbps across the entire operating voltage range.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VL) | 1.71 to 5.5 | V |
| Supply Voltage (VCC) | 1.71 to 5.5 | V |
| Guaranteed Data Rate | 13 Mbps | |
| Propagation Delay (tPD) | 15 ns (max.) at TA = 85 °C | ns |
| Output Impedance | |IOHA| = 20 µA (min.) at VL = 1.8 V; VCC = 5.5 V | µA |
| Low Power Dissipation | ITS-VL = ITS-VCC = 1 µA (max.) at TA = 85 °C | µA |
| Operating Temperature | -40 to 85 | °C |
| Package | TSSOP-20 | |
| ESD Protection | ±15 kV on I/Os at VCC side | kV |
Key Features
- High Speed: Propagation delay of 15 ns (max.) at TA = 85 °C.
- Guaranteed Data Rate: 13 Mbps over the entire specified operating voltage range.
- Low Power Dissipation: Current consumption reduced to less than 1 µA in disable mode.
- Bidirectional Level Translation: Allows data transfer in both VCC to VL and VL to VCC directions independently.
- Totem Pole and Open Drain Driving: Suitable for I2C communications.
- 5 V Tolerant on Enable Pin: Ensures compatibility with various voltage levels.
- Wide Operating Voltage Range: VL and VCC can range from 1.71 V to 5.5 V.
- ESD Protection: ±15 kV ESD protection on I/Os at the VCC side.
Applications
The ST2378E is ideal for various applications requiring level translation between different voltage domains, such as:
- Interface between low voltage ASICs/PLDs and higher voltage systems.
- I2C bus level translation.
- General-purpose level translation in mixed-voltage systems.
- Industrial and consumer electronics where voltage level compatibility is crucial.
Q & A
- What is the primary function of the ST2378E device?
The ST2378E is an 8-bit, dual supply, bidirectional level translator designed to interface data transfer between low voltage ASICs/PLDs and higher voltage systems.
- What is the operating voltage range for VL and VCC?
The operating voltage range for both VL and VCC is from 1.71 V to 5.5 V, with VCC required to be higher than VL.
- What is the guaranteed data rate of the ST2378E?
The guaranteed data rate is 13 Mbps over the entire specified operating voltage range.
- What type of ESD protection does the ST2378E offer?
The ST2378E offers ±15 kV ESD protection on I/Os at the VCC side.
- What is the propagation delay of the ST2378E?
The propagation delay (tPD) is 15 ns (max.) at TA = 85 °C.
- How does the ST2378E manage power consumption in disable mode?
In disable mode, the current consumption is reduced to less than 1 µA.
- What package type is the ST2378E available in?
The ST2378E is available in a TSSOP-20 package.
- Is the ST2378E suitable for I2C communications?
Yes, the ST2378E supports totem pole and open drain driving, making it suitable for I2C communications.
- What is the operating temperature range of the ST2378E?
The operating temperature range is from -40 °C to 85 °C.
- Can the ST2378E handle different data transfer directions independently?
Yes, the ST2378E allows bidirectional asynchronous data transfer, enabling each channel to have either VCC to VL or VL to VCC data transfer direction independently.
