Overview
The PCF85176H/1,518 is a versatile LCD driver and controller produced by NXP USA Inc. This device is designed to interface with a wide range of Liquid Crystal Displays (LCDs) that operate at low multiplex rates. It is capable of generating drive signals for both static and multiplexed LCDs, supporting up to four backplanes and 40 segments. The PCF85176H is compatible with most microprocessors and microcontrollers, communicating through a two-line bidirectional I²C-bus. This makes it an ideal solution for various LCD applications, including alphanumeric and graphic displays.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | NXP USA Inc. |
| Package Style | TQFP-64 |
| Mounting Method | Surface Mount |
| Segments Count | 40 |
| No of Elements | 160 |
| Supply Voltage | 1.8V to 5.5V |
| LCD Supply Voltage [VLCD] | 2.5V to 6.5V |
| Logic Input Voltage-Max | 6.5V |
| Multiplexed Display Capability | Yes |
| I²C-bus Frequency | 400 kHz |
| Operating Temperature | -40 °C to +85 °C |
Key Features
- Single chip LCD controller and driver
- 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
- 40 segment drives: up to 20 7-segment numeric characters, up to 10 14-segment alphanumeric characters, or any graphics of up to 160 elements
- 40 × 4-bit RAM for display data storage
- 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
- No external components required
- Manufactured in silicon gate CMOS process
Applications
The PCF85176H is suitable for a variety of LCD applications, including:
- Alphanumeric displays: up to 20 7-segment numeric characters or up to 10 14-segment alphanumeric characters.
- Graphic displays: any graphics of up to 160 elements.
- Larger LCD applications: can be easily cascaded to support up to 2560 elements.
- Industrial and automotive systems: due to its wide operating temperature range and robust design.
Q & A
- What is the primary function of the PCF85176H?
The PCF85176H is a single chip LCD controller and driver designed to interface with Liquid Crystal Displays (LCDs) with low multiplex rates.
- What types of LCDs can the PCF85176H support?
The device can support both static and multiplexed LCDs with up to four backplanes and 40 segments.
- How does the PCF85176H communicate with microprocessors or microcontrollers?
It communicates via a two-line bidirectional I²C-bus.
- What is the power supply range for the PCF85176H?
The device operates with a supply voltage range of 1.8V to 5.5V and an LCD supply voltage range of 2.5V to 6.5V.
- Can the PCF85176H be cascaded for larger LCD applications?
Yes, it can be cascaded to support up to 2560 elements.
- What is the I²C-bus frequency of the PCF85176H?
The I²C-bus frequency is 400 kHz.
- Does the PCF85176H require external components?
No, it does not require any external components.
- What is the operating temperature range of the PCF85176H?
The operating temperature range is -40 °C to +85 °C.
- What package styles are available for the PCF85176H?
The device is available in TQFP-64 and TSSOP56 packages.
- How many segments can the PCF85176H drive?
The device can drive up to 40 segments.
