Overview
The PCF8551ATT/AY is a universal 36 x 4 LCD segment driver produced by NXP USA Inc. This single-chip LCD controller and driver is designed to provide a comprehensive solution for various LCD display needs. It features either an I2C-bus (PCF8551A) or an SPI-bus (PCF8551B) interface, making it versatile for different application requirements. The device includes an internal oscillator, bias generation, instruction decoding, and a display controller, ensuring efficient and reliable operation.
Key Specifications
| Specification | Description |
|---|---|
| Package | TSSOP48 |
| Interface | I2C-bus (PCF8551A) or SPI-bus (PCF8551B) |
| Segment Drivers | 36 segment drivers |
| Backplane Drivers | 4 backplane drivers |
| Temperature Range | -40 °C to 85 °C |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| Supply Voltage (VLCD) | 1.8 V to 5.5 V |
| Backplane Drive Configuration | Static, 2, 3, or 4 backplane multiplexing |
| Display Bias Configuration | Static, 1/2, or 1/3 |
| Internal Oscillator | Internally generated or externally supplied clock signal |
| I2C/SPI Bus Frequency | 400 kHz (I2C), 5 MHz (SPI) |
Key Features
- Ultra low-power consumption
- 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 buffers
- 36 segment drives supporting up to 18 7-segment numeric characters, up to 9 14-segment alphanumeric characters, or any graphics of up to 144 segments/elements
- Auto-incrementing display data and instruction loading
- Versatile blinking modes
- Independent supplies for VDD and VLCD
Applications
- Metering equipment
- Consumer healthcare devices
- Battery operated devices
- Measuring equipment
Q & A
- What is the PCF8551ATT/AY used for? The PCF8551ATT/AY is used as a universal 36 x 4 LCD segment driver, providing a single-chip solution for LCD display control and driving.
- What interfaces does the PCF8551ATT/AY support? The PCF8551ATT/AY supports either an I2C-bus (PCF8551A) or an SPI-bus (PCF8551B) interface.
- What is the temperature range of the PCF8551ATT/AY? The temperature range is -40 °C to 85 °C.
- How many segment and backplane drivers does the PCF8551ATT/AY have? It has 36 segment drivers and 4 backplane drivers.
- What are the supply voltage ranges for VDD and VLCD? Both VDD and VLCD have supply voltage ranges of 1.8 V to 5.5 V.
- What are the backplane drive and display bias configurations available? The backplane drive configuration can be static, 2, 3, or 4 backplane multiplexing, and the display bias configuration can be static, 1/2, or 1/3.
- Does the PCF8551ATT/AY have an internal oscillator? Yes, it has an internally generated or externally supplied clock signal.
- What are the typical applications of the PCF8551ATT/AY? Typical applications include metering equipment, consumer healthcare devices, battery operated devices, and measuring equipment.
- What package type is the PCF8551ATT/AY available in? It is available in a TSSOP48 package.
- Is the PCF8551ATT/AY compliant with environmental standards? Yes, it is PbFree, EU RoHS compliant, and Halogen Free, with a REACH SVHC status.
