NXP Semiconductors PCF8566P,112

Overview

PCF8566P,112 from NXP Semiconductors is a single-chip LCD controller/driver IC for static or low-multiplex-rate LCDs with up to 4 backplanes and 24 segments. It features I²C-bus interface, 24 × 4-bit display RAM, selectable 1/2 or 1/3 bias, and internal LCD bias generation - enabling direct drive of numeric, alphanumeric, or graphic LCDs in battery-powered instrumentation and consumer displays.

For engineers reviewing the PCF8566P,112 datasheet, PCF8566P,112 pinout, PCF8566P,112 application, or PCF8566P,112 equivalent, this device supports cascaded LCD systems up to 1536 segments, offers power-saving mode for <1 µA standby current, and delivers configurable drive waveforms for 1:2–1:4 multiplexing with verified discrimination ratios per NXP Rev. 07 datasheet.

Technical Context

The PCF8566P,112 implements a synchronous LCD drive architecture with an internal oscillator (enabled via OSC–VSS) or external clock input (OSC–VDD), generating frame frequencies of 69 Hz (normal) or 65 Hz (power-saving) at 200 kHz/31 kHz clock inputs. Its display RAM auto-increment logic adapts to drive mode: +8 addresses in static, +4 in 1:2, +3 in 1:3, and +2 in 1:4 multiplexing.

Hardware subaddressing (A0–A2, SA0) enables seamless cascading across multiple PCF8566P,112 devices, while bank switching in static and duplex modes allows dual-buffered display updates without I²C overhead. The blinker module supports full-display blinking at 0.5–2 Hz or selective segment blinking via RAM bank exchange.

Key Specifications

Pinout & Package

PCF8566P,112 uses a 40-lead plastic dual in-line package (DIP40, SOT129-1), 600 mil width, through-hole mountable. Pin pitch is 2.54 mm; body dimensions are 52.2 mm × 12.7 mm × 4.1 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LCD controller/driver applications.

Compared with PCF8566P,112, the PCF8576C extends segment count but increases layout complexity and firmware adaptation effort, while HD44780-compatible alternatives sacrifice integration and low-power operation for interface simplicity and broad legacy support.

Availability

PCF8566P,112 is available at Aetrix Electronics and suitable for industrial panel meters, consumer remote controls, medical handhelds, and home appliance control panels requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PCF8566P,112 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in mixed-signal and interface ICs.

The PCF8566P,112 belongs to NXP's universal LCD driver product line, designed specifically for low-multiplex-rate segment-based displays in resource-constrained, battery-operated, and EMI-prone embedded systems.

FAQ

What is the maximum LCD size supported by the PCF8566P,112?

The PCF8566P,112 supports LCDs with up to 4 backplanes and 24 segments - totaling 96 display elements. This enables configurations such as twelve 7-segment digits (with decimal points), six 14-segment alphanumeric characters, or custom graphics layouts. Cascading multiple PCF8566P,112 devices extends capacity to 1536 segments, as confirmed in the NXP datasheet Rev. 07 Section 1.

Does the PCF8566P,112 require external components for LCD biasing?

No, the PCF8566P,112 includes an internal LCD bias generator with a three-resistor divider and switchable center tap, providing precise 1/2 or 1/3 bias voltages without external components. Only VDD, VSS, and VLCD connections are required - verified in Section 7.2 and Figure 1 of the official datasheet.

How does the PCF8566P,112 handle cascaded LCD configurations?

The PCF8566P,112 uses SYNC pin synchronization and hardware subaddressing (A0–A2, SA0) to coordinate timing and RAM addressing across multiple devices. Data auto-wraps to the next device when display RAM boundaries are exceeded - a feature validated in Section 7.13 and Figure 4 of the NXP datasheet.

What are the power consumption characteristics of the PCF8566P,112?

In normal operation, the PCF8566P,112 draws typical current in the 100–300 µA range depending on clock frequency and display load. Its dedicated power-saving mode reduces effective clock division by 6×, enabling ultra-low standby current (<1 µA) - critical for battery applications like remote controls, as specified in Section 7.6 and Table 6.

Can the PCF8566P,112 drive both static and multiplexed LCDs?

Yes, the PCF8566P,112 natively supports static (1-backplane), 1:2, 1:3, and 1:4 multiplexed LCDs. Drive mode is selected via command register; backplane outputs (BP0–BP3) reconfigure automatically - e.g., all four outputs carry identical signals in static mode, while BP3 mirrors BP1 in 1:3 mode per Section 7.10.