Product Overview
The CD40109BPWR from Texas Instruments is a quad low-to-high voltage level shifter with 3-state outputs. It converts logic levels from low to high voltage (or vice versa) with independent enable controls for each direction, in a 16-pin TSSOP package.
Key Specifications
| Function | Quad Low-to-High Voltage Level Shifter |
| Channels | 4 |
| VDDA (Low Side) | 3V to 15V |
| VDDB (High Side) | 3V to 15V |
| Direction | Bidirectional (A to B or B to A) |
| Output Type | 3-State |
| Propagation Delay | 120ns (typ) |
| Operating Temperature | -55 to 125 C |
Features
- Four independent bidirectional level shifter channels
- Independent enable for each direction
- Wide voltage range: 3V to 15V on each side
- 3-state outputs for bus sharing
- Separate VDDA and VDDB power supplies
- High noise immunity
Applications
- Logic level translation between voltage domains
- Interface between 3.3V and 5V systems
- Microcontroller peripheral interfacing
- Industrial control bus level shifting
- Multi-voltage board-level communication