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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Display Drivers

NXP Semiconductors PCF8576T/1,112

Name: PCF8576T/1,112
Brand: NXP Semiconductors
SKU: PCF8576T/1,112
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PCF8576T/1,112

Manufacturer:: NXP Semiconductors

Category:: Display Drivers

Package:: 56-BSOP (0.435", 11.05mm Width)

Datasheet:: PCF8576T/1,112.pdf

Description:: IC DRVR 8 SEGMENT 56VSOP

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Product details

Overview

PCF8576T/1,112 from NXP Semiconductors (formerly Philips) is a single-chip I²C-bus LCD controller/driver supporting static or 2/3/4-backplane multiplexing, 40 segment outputs (S0–S39), internal LCD bias generation, and 40 × 4-bit display RAM. It operates from 2 V to 9 V logic/LCD supplies and targets low-power embedded displays in consumer electronics and instrumentation.

For engineers reviewing the PCF8576T/1,112 datasheet, PCF8576T/1,112 pinout, PCF8576T/1,112 application, or PCF8576T/1,112 equivalent, key selection criteria include its VSO56 package compatibility, I²C-bus address configuration via A0–A2/SA0, selectable 1/2 or 1/3 LCD bias, power-saving mode for battery operation, and cascading capability with PCF8566 for large-panel systems.

Technical Context

The PCF8576T/1,112 integrates an I²C-bus controller with command decoder, display RAM auto-increment addressing, hardware subaddressing, and display memory bank switching for static and duplex drive modes. Its oscillator supports internal (R_OSC-based) or external clock input at pin CLK, with frame frequency derived as f_CLK/2880 (normal) or f_CLK/480 (power-saving).

It implements LCD drive waveforms for static, 1:2, 1:3, and 1:4 multiplex modes using internal voltage divider biasing (1/2 or 1/3), with backplane outputs BP0–BP3 and segment outputs S0–S39 directly driving the LCD panel. Blinking is supported via dedicated BLINK command with configurable frequencies tied to f_CLK.

Key Specifications

Parameter	Value and Actual Design Meaning
Display Drive Capability	Up to 160 LCD elements (e.g., 20×8-segment digits or 10×15-segment alphanumerics) using 4 backplanes and 40 segments.
I²C-Bus Interface	Standard-mode (100 kHz max) bidirectional interface with slave address set by A0–A2 and SA0 pins; supports cascaded multi-device systems.
Supply Voltage Range	VDD = 2 V to 9 V; VLCD independently configurable - enables use with low-threshold (2 V) or high-threshold (automotive TN) LCDs.
Display Memory	40 × 4-bit static RAM with auto-incremented addressing and subaddress boundary wraparound for seamless cascading.
Power-Saving Mode	Reduces internal clock division ratio by 6×, lowering supply current significantly while increasing I²C data transfer latency.
Oscillator Options	Internal RC oscillator (R_OSC to VSS) or external clock applied to CLK pin; minimum f_CLK = 125 kHz required for full 100 kHz I²C throughput.

Pinout & Package

PCF8576T/1,112 is housed in a space-saving 56-lead plastic Very Small Outline (VSO56) package per SOT190-1 outline, optimized for plane wiring in single- and multi-device LCD applications.

Pin/Terminal	Circuit Role	Design Meaning
SDA (1)	I²C serial data I/O	Open-drain bidirectional bus line requiring external pull-up; handles command/data transfers and ACK/NACK signaling.
SCL (2)	I²C serial clock input	Master-generated clock synchronizing all I²C transactions; device samples SDA on rising edge.
SYNC (3)	Cascade synchronization I/O	Propagates timing alignment signal between multiple PCF8576 devices in daisy-chained configurations.
CLK (4)	External clock input/output	Accepts external clock when OSC = VDD; outputs internal oscillator signal when OSC = VSS for driving PCF8566 slaves.
VDD (5)	Logic supply voltage	Primary power for digital core and I²C interface; range 2–9 V supports wide LCD threshold compatibility.
OSC (6)	Oscillator control	Connect to VSS for internal RC oscillator; connect to VDD to enable external clock mode.
A0–A2 (7–9)	I²C subaddress inputs	Hardware-configured 3-bit subaddress enabling up to 8 devices on same I²C bus without address conflict.
SA0 (10)	I²C slave address bit 0	LSB of 7-bit slave address; combined with fixed prefix 0x70–0x77 depending on A0–A2 state.
VSS (11)	Logic ground	Reference for digital circuitry and internal oscillator; must be low-impedance connection to minimize noise coupling.
VLCD (12)	LCD supply voltage	Independent bias source for LCD panel; sets V_op = VDD − VLCD and enables temperature compensation via external circuitry.
BP0–BP3 (13–16)	LCD backplane outputs	Drive up to four LCD backplanes; support pairing (e.g., BP0/BP2 in 1:2 mode) for enhanced current delivery.
S0–S39 (17–56)	LCD segment outputs	40 CMOS-compatible outputs directly connected to LCD segments; unused pins may be left open.

Key Features

Feature	Design Value
Configurable LCD drive modes	Supports static, 1:2, 1:3, and 1:4 multiplexing with selectable 1/2 or 1/3 bias - matches diverse LCD panel architectures without external components.
Low external component count	Requires at most one external resistor (R_OSC) even in multi-device systems - reduces BOM cost and PCB area.
Bank-switchable display RAM	Enables dual-bank display preparation in static and 1:2 modes - allows flicker-free content updates by switching active RAM banks via BANK SELECT command.
Versatile blinking control	Full-display or arbitrary segment blinking via hardware-controlled bank exchange or RAM update - eliminates MCU intervention for common UI feedback patterns.
Chip-on-glass compatibility	Optimized pinout and bonding pad layout support direct integration with COG LCD modules - simplifies mechanical design and improves signal integrity.

Applications

Consumer Electronics Display	Industrial Instrumentation Panel
Use Scenario: Driving 16-character alphanumeric LCD in portable multimeter or thermostat. IC Role / Device Role / Timing Role: Primary LCD controller/driver handling I²C commands, RAM management, and multiplexed segment/backplane waveform generation. Use Value: Eliminates need for discrete timing ICs or microcontroller GPIO expansion; 40×4-bit RAM stores full display state with auto-increment writes reducing firmware overhead.	Use Scenario: Controlling segmented bar-graph and numeric readout in programmable logic controller (PLC) HMI. IC Role / Device Role / Timing Role: Standalone display engine interfacing to host MCU via I²C, managing static + 1:2 multiplexed segments simultaneously via bank switching. Use Value: Enables dual-display zones (e.g., status indicators + measurement digits) with independent update timing and zero-latency visual transitions.
Automotive Dashboard Indicator	Telecom Handset Display
Use Scenario: Driving high-threshold twisted-nematic LCD in vehicle instrument cluster under 9 V battery supply. IC Role / Device Role / Timing Role: LCD bias generator and driver delivering stable V_op across temperature via VLCD compensation, operating in 1:4 multiplex mode. Use Value: Wide 2–9 V supply range and internal 1/3-bias generation ensure reliable contrast at cold start (-40°C) and hot idle (85°C) without external voltage dividers.	Use Scenario: Power-constrained monochrome display in cordless phone base station with intermittent backlight usage. IC Role / Device Role / Timing Role: Low-power LCD driver activating power-saving mode during standby, reducing quiescent current while maintaining display retention. Use Value: Achieves sub-10 µA typical supply current in power-save mode - extends battery life in always-on telecom applications without display blanking.

Consumer Electronics Display

Industrial Instrumentation Panel

Use Scenario: Driving 16-character alphanumeric LCD in portable multimeter or thermostat.

IC Role / Device Role / Timing Role: Primary LCD controller/driver handling I²C commands, RAM management, and multiplexed segment/backplane waveform generation.

Use Value: Eliminates need for discrete timing ICs or microcontroller GPIO expansion; 40×4-bit RAM stores full display state with auto-increment writes reducing firmware overhead.

Use Scenario: Controlling segmented bar-graph and numeric readout in programmable logic controller (PLC) HMI.

IC Role / Device Role / Timing Role: Standalone display engine interfacing to host MCU via I²C, managing static + 1:2 multiplexed segments simultaneously via bank switching.

Use Value: Enables dual-display zones (e.g., status indicators + measurement digits) with independent update timing and zero-latency visual transitions.

Automotive Dashboard Indicator

Telecom Handset Display

Use Scenario: Driving high-threshold twisted-nematic LCD in vehicle instrument cluster under 9 V battery supply.

IC Role / Device Role / Timing Role: LCD bias generator and driver delivering stable V_op across temperature via VLCD compensation, operating in 1:4 multiplex mode.

Use Value: Wide 2–9 V supply range and internal 1/3-bias generation ensure reliable contrast at cold start (-40°C) and hot idle (85°C) without external voltage dividers.

Use Scenario: Power-constrained monochrome display in cordless phone base station with intermittent backlight usage.

IC Role / Device Role / Timing Role: Low-power LCD driver activating power-saving mode during standby, reducing quiescent current while maintaining display retention.

Use Value: Achieves sub-10 µA typical supply current in power-save mode - extends battery life in always-on telecom applications without display blanking.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
PCF8566T/1,112	24-segment, 3-backplane driver; smaller RAM (24×4-bit); shares identical I²C protocol and cascade architecture.	Targeted for smaller displays (e.g., 6-digit numeric); requires fewer PCB pads but lacks PCF8576T/1,112's 40-segment capacity and 4-backplane support.	Select when display size is ≤120 elements and board space is constrained; not suitable for 4-backplane panels.
PCF8576AT/1,112	Enhanced version with improved ESD rating (±4 kV HBM) and extended temperature range (−40°C to +105°C) versus standard PCF8576T/1,112 (−40°C to +85°C).	Required for automotive under-hood or industrial environments exceeding 85°C ambient; otherwise functionally identical in electrical behavior and pinout.	Choose for extended thermal reliability where qualification to AEC-Q100 or industrial-grade operation is mandatory.

Compared with PCF8576T/1,112, PCF8566T/1,112 offers reduced segment count and lower pin count for compact designs, while PCF8576AT/1,112 provides higher thermal and ESD robustness without altering functionality - both retain full software compatibility and cascade interoperability.

Availability

PCF8576T/1,112 is available at Aetrix Electronics and suitable for consumer electronics, industrial instrumentation, and telecom handset applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for PCF8576T/1,112 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 specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with legacy roots in Philips' analog and mixed-signal product lines.

The PCF8576T/1,112 belongs to NXP's universal LCD driver family designed specifically for low-multiplex-rate character and segment-based displays in cost-sensitive, low-power embedded systems.

FAQ

What is the maximum number of LCD segments the PCF8576T/1,112 can drive?

The PCF8576T/1,112 supports up to 40 segment outputs (S0–S39) and up to 4 backplane outputs (BP0–BP3), enabling a maximum of 160 LCD elements (e.g., 20 eight-segment digits or 10 fifteen-segment alphanumeric characters). This capacity is fixed per device and scalable via cascading with additional PCF8576T/1,112 or PCF8566T/1,112 units.

Does the PCF8576T/1,112 require external resistors for LCD bias generation?

No, the PCF8576T/1,112 includes an internal three-resistor voltage divider between VDD and VLCD to generate 1/2 or 1/3 LCD bias levels. Only one external resistor (R_OSC) is needed if using the internal oscillator; no bias-setting resistors are required for standard operation.

Can the PCF8576T/1,112 operate with separate logic and LCD supply voltages?

Yes, the PCF8576T/1,112 supports independent VDD (2–9 V) and VLCD supplies, allowing optimization of logic-level compatibility and LCD contrast requirements. This separation enables use with low-threshold (2 V) or high-threshold (9 V) LCD panels without compromising digital interface integrity.

How does the PCF8576T/1,112 handle I²C-bus address conflicts in multi-device systems?

The PCF8576T/1,112 uses hardware-configurable address bits A0–A2 and SA0 to set a unique 7-bit slave address within the 0x70–0x77 range. Up to eight devices can share one I²C bus without address collision, and subaddressing ensures correct data routing across cascaded units via automatic boundary wraparound.

Is the PCF8576T/1,112 compatible with chip-on-glass (COG) LCD modules?

Yes, the PCF8576T/1,112 is explicitly designed for chip-on-glass compatibility, with optimized pinout, bonding pad layout, and drive strength matching COG module requirements. Its VSO56 package and direct segment/backplane output structure simplify integration into COG-based displays.

PCF8576T/1,112 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

Package/Case:: 56-BSOP (0.435", 11.05mm Width)

Packaging:: Tube

Product Status:: Obsolete

Display Type:: LCD

Configuration:: 8 Segment, 15 Segment, 160 Element

Interface:: I2C

Digits or Characters:: 10 Characters, 20 Characters, 160 Elements

Current - Supply:: 180 µA

Voltage - Supply:: 2V ~ 9V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-VSO

PCF8576T/1,112 FAQ

1.How can I place an order for PCF8576T/1,112 through Aetrix?

Please submit a Request for Quotation (RFQ) for PCF8576T/1,112 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for PCF8576T/1,112 reliable?

The price and inventory of PCF8576T/1,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCF8576T/1,112 is usually 5 days.

3.What payment methods are accepted for PCF8576T/1,112?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCF8576T/1,112 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PCF8576T/1,112?

PCF8576T/1,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PCF8576T/1,112 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for PCF8576T/1,112?

For technical support, including PCF8576T/1,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCF8576T/1,112 requirements.

6.How does Aetrix verify that PCF8576T/1,112 is sourced from the original manufacturer or authorized distributors?

All PCF8576T/1,112 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PCF8576T/1,112 meets industry standards.

7.What is the process for return or replacement of PCF8576T/1,112?

All PCF8576T/1,112 units undergo pre-shipment inspection (PSI). If there is an issue with PCF8576T/1,112, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The PCF8576T/1,112 part is unused and in its original packaging.

Return procedure for PCF8576T/1,112:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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