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NXP Semiconductors PCF8576CT/1,518
- Part No.:
- PCF8576CT/1,518
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 56-BSOP (0.435", 11.05mm Width)
- Datasheet:
-
PCF8576CT/1,518.pdf
- Description:
- IC DRVR 7 SEGMENT 56VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,889
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Product details
Overview
PCF8576CT/1,518 from NXP Semiconductors is a universal LCD controller and driver IC designed for static or low-multiplex-rate LCDs with up to 4 backplanes and 40 segments. It integrates I²C-bus interface, internal LCD bias generation, 40 × 4-bit display RAM, selectable 1:1–1:4 multiplex drive modes, and power-saving mode - enabling direct drive of alphanumeric displays (e.g., 20×7-segment digits) in battery-powered instrumentation.
For engineers reviewing the PCF8576CT/1,518 datasheet, PCF8576CT/1,518 pinout, PCF8576CT/1,518 application, or PCF8576CT/1,518 equivalent, key selection criteria include its VSO56 package compatibility, 2–6 V logic/LCD supply flexibility, auto-incremented RAM addressing across subaddresses, cascading capability via SYNC/CLK pins, and support for 1/2 or 1/3 LCD bias configurations without external components.
Technical Context
The PCF8576CT/1,518 implements a synchronous LCD drive architecture with an internal oscillator (enabled by OSC = VSS) or external clock input (OSC = VDD), generating frame frequencies of 69 Hz (normal mode) or 65 Hz (power-saving mode) at fclk = 200 kHz. Its display RAM is statically mapped to segment outputs S0–S39 and backplane outputs BP0–BP3, with data pointer auto-increment values dependent on multiplex mode: +8 (static), +4 (1:2), +3 (1:3), or +2 (1:4).
Hardware subaddressing via A0–A2 enables seamless cascading of multiple PCF8576C devices on one I²C bus, while the SYNC pin synchronizes timing between units. The device uses internal voltage-follower buffers for VLCD bias generation and supports combined or separate VDD/VLCD supplies - critical for optimizing contrast across twisted-nematic or low-threshold LCD panels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Display Capacity | Up to 40 segments × 4 backplanes = 160 LCD elements; supports static, 1:2, 1:3, or 1:4 multiplex drive |
| I²C Interface | Standard-mode (100 kHz max); bidirectional SDA/SCL with hardware subaddressing (A0–A2) and auto-incremented RAM addressing |
| LCD Bias Generation | Internal resistor-divider network; selectable 1/2 or 1/3 bias for 1:2/1:3/1:4 modes; no external components required |
| Supply Range | VDD = 2 V to 6 V; VLCD independently configurable - enables operation with low-threshold (2 V) or high-threshold (6 V) LCDs |
| Power Modes | Normal-power mode (69 Hz frame rate @ 200 kHz clk) and power-saving mode (65 Hz @ 31 kHz clk; 6× lower current) |
| Display Memory | 40 × 4-bit static RAM; one-to-one mapping between RAM bits and LCD elements; bank switching supported in static/duplex modes |
| Cascading Support | SYNC and CLK pins enable synchronized multi-device operation; up to 2560 total elements possible (e.g., 16 × PCF8576C) |
Pinout & Package
PCF8576CT/1,518 is housed in a plastic very small outline package (VSO56) with 56 leads, body size 12.8 × 7.5 × 2.35 mm (SOT190-1), optimized for plane wiring in single- and multi-device LCD systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDA (Pin 1) | I²C serial data I/O | Bidirectional open-drain interface; requires external pull-up; handles command/data transfers and ACK/NACK |
| SCL (Pin 2) | I²C serial clock input | Master-generated clock; synchronizes all I²C transactions including display RAM writes and mode commands |
| SYNC (Pin 3) | Cascade synchronization I/O | Output when master; input when slave; ensures phase alignment of frame timing across multiple PCF8576C devices |
| CLK (Pin 4) | External clock input / internal clock output | Driven by external source if OSC = VDD; outputs internal oscillator signal if OSC = VSS for daisy-chained devices |
| VDD (Pin 5) | Logic supply | Primary power for digital core and I²C interface; range 2–6 V; substrate tied to this pin |
| OSC (Pin 6) | Oscillator enable control | Connect to VSS to enable internal oscillator; connect to VDD to use external clock on CLK pin |
| A0–A2 (Pins 7–9) | Hardware subaddress inputs | Set 3-bit device address for cascaded operation; allows up to 8 uniquely addressed PCF8576C units per I²C bus |
| SA0 (Pin 10) | I²C bus address bit 0 | Defines LSB of 7-bit I²C slave address; combined with A0–A2 for full device addressing in multi-unit systems |
| VSS (Pin 11) | Ground reference | Common return for logic, I²C, and internal bias circuitry; must be low-impedance connection |
| VLCD (Pin 12) | LCD supply voltage | Independent analog supply for LCD panel; sets full-scale LCD voltage (Voper = VDD − VLCD); enables temperature compensation |
| BP0–BP3 (Pins 13–16) | LCD backplane outputs | Time-multiplexed outputs; configured per drive mode (e.g., all active in 1:4; BP0/BP2 & BP1/BP3 paired in 1:2) |
| S0–S39 (Pins 17–56) | LCD segment outputs | 40 dedicated outputs directly driving LCD segments; unused pins left open-circuit; mapped 1:1 to RAM columns |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LCD bias generator | Eliminates need for external resistive divider or charge pump; supports 1/2 or 1/3 bias via internal switchable resistor network |
| Auto-incremented RAM addressing | Enables continuous multi-byte display updates without repeated address commands; increment step adapts to multiplex mode (2–8) |
| Hardware subaddressing (A0–A2) | Allows up to 8 PCF8576C devices on same I²C bus without address conflict; simplifies firmware for multi-display systems |
| Power-saving mode | Reduces frame clock frequency by factor of 6 (200 kHz → 31 kHz), cutting dynamic power consumption significantly for portable applications |
| Cascadable SYNC/CLK architecture | Ensures deterministic timing alignment across multiple drivers; avoids display flicker or ghosting in large-panel implementations |
| No external components required | Full functionality achieved with only VDD, VSS, VLCD, and LCD panel connections - reduces BOM cost and PCB area |
Applications
| Industrial Panel Meters | Medical Device Displays |
|---|---|
|
Use Scenario: Digital multimeters and process controllers requiring stable, low-power numeric readouts with 4–5 digit resolution. IC Role / Device Role / Timing Role: Primary LCD controller/driver; manages 1:4 multiplexed 20×7-segment display using internal bias and 69 Hz frame rate. Use Value: Enables direct microcontroller interface via I²C with no external bias components, reducing system cost and layout complexity while maintaining >10% contrast over temperature. |
Use Scenario: Portable blood glucose monitors and infusion pump interfaces needing reliable segment-based status indicators under battery operation. IC Role / Device Role / Timing Role: Low-power LCD driver operating in power-saving mode (31 kHz clock, 65 Hz frame); drives 10×14-segment alphanumeric display. Use Value: Achieves <10 µA standby current and supports VLCD adjustment to maintain contrast across varying LCD thresholds, extending battery life. |
| Consumer Appliance UIs | Telecom Handsets |
|
Use Scenario: Microwave ovens and washing machines with segmented time/temperature displays and icon-based feedback. IC Role / Device Role / Timing Role: Universal LCD driver supporting mixed static (icons) and 1:2 multiplexed (digits) configurations; uses SA0/A0–A2 for dual-display addressing. Use Value: Single IC replaces discrete driver solutions; hardware subaddressing allows independent control of two 40-segment displays from one microcontroller. |
Use Scenario: Feature phone keypads and status screens requiring blinking indicators and low-voltage operation from 3 V coin cells. IC Role / Device Role / Timing Role: I²C-controlled driver with programmable blink modes and 2 V minimum VDD support; uses internal oscillator for autonomous timing. Use Value: Eliminates external crystal and blink timer IC; integrated blinking logic reduces firmware overhead and enables synchronized LED/LCD alerts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF8576CHL/1,118 | LQFP64 package (10 × 10 × 1.4 mm); identical electrical specs and register map; different pinout and thermal profile | Preferred for high-density PCBs requiring better thermal dissipation and reworkability; not drop-in compatible with VSO56 footprint | Select when board space allows larger package and thermal management is critical; verify layout for 64-pin routing and decoupling. |
| PCF8576CU/2/F2,026 | Bare die (3.2 × 2.92 × 0.40 mm); same functionality but requires custom COB or module integration; no leadframe or solder joints | Targeted at ultra-compact modules (e.g., smart card displays) where VSO56 height or lead pitch is prohibitive | Choose only for volume production with wire-bond assembly capability; no evaluation or prototyping support available. |
Compared with PCF8576CHL/1,118 and PCF8576CU/2/F2,026, the PCF8576CT/1,518 offers optimal balance of compactness (VSO56), manufacturability (standard SMT), and design flexibility - making it the default choice for mid-volume consumer and industrial LCD applications where board area and assembly yield are constrained.
Availability
PCF8576CT/1,518 is available at Aetrix Electronics and suitable for industrial panel meters, medical device displays, consumer appliance UIs, and telecom handsets requiring stable component supply with long-term lifecycle assurance.
Supply support for PCF8576CT/1,518 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 applications, with deep expertise in mixed-signal and interface ICs.
The PCF8576C family was developed to simplify LCD integration in resource-constrained embedded systems, delivering single-chip control, bias generation, and drive capability for low-multiplex-rate displays without external components.
FAQ
What is the maximum LCD segment count supported by PCF8576CT/1,518?
The PCF8576CT/1,518 supports up to 40 segment outputs (S0–S39) and up to 4 backplane outputs (BP0–BP3), enabling drive of LCDs with up to 160 elements (e.g., 20×7-segment digits or 10×14-segment characters). This capacity is fixed and cannot be extended beyond 40 segments per device, though cascading multiple PCF8576CT/1,518 units increases total element count linearly.
Does PCF8576CT/1,518 require external components for LCD bias generation?
No - the PCF8576CT/1,518 includes an internal voltage-divider network with switchable resistors to generate 1/2 or 1/3 LCD bias voltages. Only VDD, VSS, and VLCD supplies plus the LCD panel are needed; no external resistors, capacitors, or charge pumps are required for standard operation across all supported multiplex modes.
How does the PCF8576CT/1,518 handle cascaded configurations?
The PCF8576CT/1,518 uses hardware subaddressing (A0–A2 pins) to assign unique 3-bit addresses and the SYNC/CLK pins to synchronize frame timing across multiple devices. When display data exceeds one device's RAM capacity, auto-incremented addressing wraps to the next PCF8576CT/1,518 in the chain - enabling seamless expansion to 2560 total elements without firmware address management.
What are the power supply requirements for PCF8576CT/1,518?
The PCF8576CT/1,518 operates with VDD = 2 V to 6 V for logic and I²C interface, and VLCD independently configurable within the same range. Separate or combined VDD/VLCD supplies are supported. Minimum 2 V operation enables compatibility with low-threshold LCDs in battery-powered designs, while 6 V support accommodates high-threshold twisted-nematic panels.
Can PCF8576CT/1,518 drive both static and multiplexed LCDs?
Yes - the PCF8576CT/1,518 natively supports static (1:1), 1:2, 1:3, and 1:4 multiplex drive modes via mode-set commands. Backplane outputs BP0–BP3 are dynamically assigned based on selected mode (e.g., all four active in 1:4; BP0/BP2 and BP1/BP3 paired in 1:2), and internal bias generation automatically adapts to 1/2 or 1/3 configuration as required.
PCF8576CT/1,518 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 56-BSOP (0.435", 11.05mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Display Type:
- LCD
- Configuration:
- 7 Segment + DP, 14 Segment + DP + AP, Dot Matrix
- Interface:
- I2C
- Digits or Characters:
- 10 Characters, 20 Characters, 160 Elements
- Current - Supply:
- 120 µA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-VSO
PCF8576CT/1,518 FAQ
1.How can I place an order for PCF8576CT/1,518 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCF8576CT/1,518 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 PCF8576CT/1,518 reliable?
The price and inventory of PCF8576CT/1,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCF8576CT/1,518 is usually 5 days.
3.What payment methods are accepted for PCF8576CT/1,518?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCF8576CT/1,518 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCF8576CT/1,518?
PCF8576CT/1,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCF8576CT/1,518 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 PCF8576CT/1,518?
For technical support, including PCF8576CT/1,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCF8576CT/1,518 requirements.
6.How does Aetrix verify that PCF8576CT/1,518 is sourced from the original manufacturer or authorized distributors?
All PCF8576CT/1,518 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 PCF8576CT/1,518 meets industry standards.
7.What is the process for return or replacement of PCF8576CT/1,518?
All PCF8576CT/1,518 units undergo pre-shipment inspection (PSI). If there is an issue with PCF8576CT/1,518, 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 PCF8576CT/1,518 part is unused and in its original packaging.
Return procedure for PCF8576CT/1,518:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCF8576CT/1,518 Tags
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