Overview
The PCF8576CTT/1,118, produced by NXP USA Inc., is a universal LCD driver designed to interface with a wide range of Liquid Crystal Displays (LCDs) that operate at low multiplex rates. This peripheral device generates the necessary drive signals for both static and multiplexed LCDs, supporting up to four backplanes and up to 40 segments. It is highly versatile and can be easily cascaded for larger LCD applications. The PCF8576CTT communicates via a two-line bidirectional I2C-bus, making it compatible with most microcontrollers and minimizing communication overheads through features like display RAM with auto-incremented addressing and hardware subaddressing.
Key Specifications
| Parameter | Description |
|---|---|
| Package / Case | 56-TFSOP (0.240", 6.10mm Width) Exposed Pad |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C |
| Interface | I²C (two-line bidirectional) |
| LCD Segment Drives | Up to 40 segments |
| LCD Supply Range | From 2 V for low-threshold LCDs to 6 V for high-threshold twisted nematic LCDs |
| Display RAM | 40 × 4-bit RAM for display data storage |
| Power Consumption | Low power consumption with power-saving mode |
Key Features
- Single-chip LCD controller and driver
- Supports up to twenty 7-segment alphanumeric characters, up to ten 14-segment alphanumeric characters, or any graphics of up to 160 elements
- Versatile blinking modes
- No external components required, even in multiple device applications
- Selectable backplane drive configuration: static, 2, 3, or 4 backplane multiplexing
- Selectable display bias configuration: static, 1⁄2, or 1⁄3
- 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
- Optimized pinning for plane wiring in both single and multiple PCF8576C applications
- Power-saving mode for extremely low power consumption in battery-operated and telephone applications
Applications
The PCF8576CTT is suitable for a variety of applications, including:
- LCD displays in consumer electronics, such as telephones, calculators, and other handheld devices
- Industrial control panels and displays
- Automotive displays and instrument clusters
- Battery-operated devices where low power consumption is critical
- Larger LCD applications through cascading multiple devices (up to 2560 elements possible)
Q & A
- What is the primary function of the PCF8576CTT?
The PCF8576CTT is a universal LCD driver that generates the drive signals for Liquid Crystal Displays (LCDs) with low multiplex rates.
- What types of LCDs can the PCF8576CTT support?
The PCF8576CTT can support both static and multiplexed LCDs, including those with up to four backplanes and up to 40 segments.
- How does the PCF8576CTT communicate with microcontrollers?
The PCF8576CTT communicates via a two-line bidirectional I2C-bus.
- What is the operating temperature range of the PCF8576CTT?
The operating temperature range is -40°C to 85°C.
- Does the PCF8576CTT require external components for operation?
No, the PCF8576CTT does not require external components, even in multiple device applications.
- What are the power consumption characteristics of the PCF8576CTT?
The PCF8576CTT has low power consumption and includes a power-saving mode for extremely low power consumption in battery-operated applications.
- Can the PCF8576CTT be cascaded for larger LCD applications?
- What types of displays can be driven by the PCF8576CTT?
The PCF8576CTT can drive displays with up to twenty 7-segment alphanumeric characters, up to ten 14-segment alphanumeric characters, or any graphics of up to 160 elements.
- What is the LCD supply range supported by the PCF8576CTT?
The PCF8576CTT supports an LCD supply range from 2 V for low-threshold LCDs to 6 V for high-threshold twisted nematic LCDs.
- Does the PCF8576CTT have any specific features for display data management?
