Overview
The PCF8576DT, produced by NXP USA Inc., is a versatile peripheral device designed to interface with a wide variety of Liquid Crystal Displays (LCDs) that have low multiplex rates. This single-chip LCD controller and driver is capable of generating the drive signals for static or multiplexed LCDs, making it highly adaptable for various display configurations.
Key Specifications
| Specification | Description |
|---|---|
| Interface | 400 kHz I2C-bus interface |
| Display Drive Capability | Up to 40 segment drives; supports up to 20 7-segment numeric characters, up to 10 14-segment alphanumeric characters, or any graphics of up to 160 segments/elements |
| Display Bias Configuration | Selectable: static, 1⁄2, or 1⁄3 |
| Backplane Drive Configuration | Selectable: static or 2, 3, 4 backplane multiplexing |
| Power Supply Range | From 1.8 V to 5.5 V for logic, and from 2.5 V to 6.5 V for LCD supply |
| Memory | 40 × 4-bit RAM for display data storage |
| Addressing | Subaddress inputs (A0 to A2) and I2C-bus address input (SA0) |
| Automotive Compliance | AEC-Q100 compliant (PCF8576DT/S400/2) |
Key Features
- Internal LCD bias generation with voltage-follower buffers
- Auto-incremented display data loading across device subaddress boundaries
- Display memory bank switching in static and duplex drive modes
- Versatile blinking modes
- Independent supplies possible for LCD and logic voltages
- Low power consumption
- Cascading capability for large LCD applications (up to 2560 segments/elements possible)
Applications
The PCF8576DT is suitable for a wide range of applications, including automotive systems due to its AEC-Q100 compliance. It can be used in various display systems such as instrument clusters, infotainment systems, industrial control panels, and any other application requiring the control of LCD displays with low multiplex rates.
Q & A
- What is the primary function of the PCF8576DT? The PCF8576DT is a single-chip LCD controller and driver designed to interface with various LCD displays.
- What types of LCD displays can the PCF8576DT support? It supports static or multiplexed LCDs with up to four backplanes and up to 40 segments.
- What is the I2C-bus interface frequency of the PCF8576DT? The I2C-bus interface operates at 400 kHz.
- What is the power supply range for the PCF8576DT? The logic supply range is from 1.8 V to 5.5 V, and the LCD supply range is from 2.5 V to 6.5 V.
- Is the PCF8576DT automotive compliant? Yes, the PCF8576DT/S400/2 is AEC-Q100 compliant for automotive applications.
- How many segment drives can the PCF8576DT handle? It can handle up to 40 segment drives.
- Can the PCF8576DT be cascaded for larger LCD applications? Yes, it can be cascaded to support up to 2560 segments/elements.
- What types of display configurations does the PCF8576DT support? It supports configurations such as 7-segment with dot, 14-segment with dot and accent, and dot matrix displays.
- Does the PCF8576DT have internal LCD bias generation? Yes, it has internal LCD bias generation with voltage-follower buffers.
- What is the memory capacity of the PCF8576DT for display data storage? It has 40 × 4-bit RAM for display data storage.
