Overview
The PCF8545BTT/AJ is a universal LCD driver designed by NXP USA Inc. This peripheral device is capable of interfacing with almost any Liquid Crystal Display (LCD) that has low multiplex rates. It is particularly versatile, supporting LCDs with up to eight backplanes and up to 320 elements. The PCF8545BTT/AJ communicates via a three-line unidirectional SPI-bus, making it compatible with a wide range of microcontrollers.
Key Specifications
| Specification | Details |
|---|---|
| Interface Type | SPI-bus (three-line unidirectional) |
| Package Type | TSSOP56 (plastic thin shrink small outline package; 56 leads; body width 6.1 mm) |
| Digital Power Supply | 1.8 V to 5.5 V |
| LCD Supply Range | 2.5 V to 5.5 V |
| Backplane Multiplexing | Selectable: 4, 6, or 8 backplanes |
| Display Bias Configuration | Selectable |
| Display RAM | 320-bit with auto-incremented addressing |
| SPI-bus Frequency | Up to 5 MHz |
| Frame Frequency | Programmable: 60 Hz to 300 Hz in steps of 10 Hz |
| Segments Driven | Up to 320 segments |
| Power Consumption | Low power consumption |
Key Features
- Single-chip 320 elements LCD controller and driver
- Wide range for digital power supply: from 1.8 V to 5.5 V
- LCD supply range from 2.5 V up to 5.5 V
- LCD and logic supplies may be separated
- Selectable backplane drive configuration: 4, 6, or 8 backplane multiplexing
- Selectable display bias configuration
- 320-bit RAM for display data storage with auto-incremented addressing
- Programmable frame frequency in the range of 60 Hz to 300 Hz in steps of 10 Hz; factory calibrated
- Supports up to 40 7-segment alphanumeric characters, up to 20 14-segment alphanumeric characters, or any graphics of up to 320 elements
- Manufactured in silicon gate CMOS process
Applications
The PCF8545BTT/AJ is suitable for a variety of industrial and consumer products. Its versatility and low power consumption make it an ideal choice for applications requiring efficient and reliable LCD control.
Q & A
- What is the PCF8545BTT/AJ used for?
The PCF8545BTT/AJ is used as a universal LCD driver to interface with and control Liquid Crystal Displays (LCDs) with low multiplex rates. - Which interface does the PCF8545BTT/AJ use?
The PCF8545BTT/AJ uses a three-line unidirectional SPI-bus interface. - What is the range of the digital power supply for the PCF8545BTT/AJ?
The digital power supply range is from 1.8 V to 5.5 V. - Can the LCD and logic supplies be separated?
Yes, the LCD and logic supplies can be separated. - What are the selectable backplane drive configurations?
The backplane drive configurations are selectable as 4, 6, or 8 backplanes. - What is the maximum SPI-bus frequency supported by the PCF8545BTT/AJ?
The maximum SPI-bus frequency supported is up to 5 MHz. - How many segments can the PCF8545BTT/AJ drive?
The PCF8545BTT/AJ can drive up to 320 segments. - What is the frame frequency range of the PCF8545BTT/AJ?
The frame frequency is programmable in the range of 60 Hz to 300 Hz in steps of 10 Hz. - Is the PCF8545BTT/AJ suitable for low power applications?
Yes, the PCF8545BTT/AJ has low power consumption, making it suitable for low power applications. - What types of displays can the PCF8545BTT/AJ support?
The PCF8545BTT/AJ can support up to 40 7-segment alphanumeric characters, up to 20 14-segment alphanumeric characters, or any graphics of up to 320 elements.
