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NXP Semiconductors PCF8576CTT/1,118
- Part No.:
- PCF8576CTT/1,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 56-TFSOP (0.240", 6.10mm Width) Exposed Pad
- Datasheet:
-
PCF8576CTT/1,118.pdf
- Description:
- IC DRVR 7 SEGMENT 56HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,934
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Product details
Overview
PCF8576CTT/1,118 from NXP Semiconductors is a single-chip LCD controller and driver IC designed for static or low-multiplex-rate LCDs with up to 4 backplanes and 40 segments. It supports I²C-bus communication, internal LCD bias generation, and selectable drive modes (1:1 to 1:4), enabling direct interface to alphanumeric or graphical LCDs in battery-powered instrumentation and consumer displays.
For engineers reviewing the PCF8576CTT/1,118 datasheet, PCF8576CTT/1,118 pinout, PCF8576CTT/1,118 application, or PCF8576CTT/1,118 equivalent, key selection criteria include its 40×4-bit display RAM, VDD/VLCD dual-supply flexibility (2–6 V), power-saving mode, cascading capability, and hardware subaddressing for multi-device systems.
Technical Context
The PCF8576CTT/1,118 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 mode) or 65 Hz (power-saving mode). Its timing engine sequences segment/backplane waveforms per selected multiplex ratio and bias configuration (1/2 or 1/3).
Display data flows from I²C-bus into a 40×4-bit static RAM, then through a shift register to the display register; auto-incremented addressing and bank switching support static/duplex modes. Hardware subaddressing (A0–A2) and SYNC pin enable seamless cascading across multiple devices without software overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Display Capacity | Up to 40 segments × 4 backplanes = 160 LCD elements; supports 20×7-seg or 10×14-seg alphanumeric layouts |
| I²C Interface | Standard-mode (100 kHz max); SDA/SCL pins with built-in input filters and auto-incremented RAM addressing |
| LCD Drive Modes | Static, 1:2, 1:3, or 1:4 multiplex; selectable via command; supports 1/2 or 1/3 bias for contrast optimization |
| Supply Range | VDD = 2–6 V; VLCD independently adjustable; enables compatibility with low-threshold and high-threshold twisted nematic LCDs |
| Power-Saving Mode | Reduces clock division ratio by 6×, lowering dynamic power consumption for battery-operated applications like telephones and meters |
| Display RAM | 40 × 4-bit static RAM with one-to-one mapping to segment/backplane outputs; no external memory required |
| Cascading Support | SYNC pin synchronizes frame timing across multiple PCF8576C devices; enables up to 2560-element displays |
Pinout & Package
PCF8576CTT/1,118 is housed in a plastic very small outline package (VSO56) with 56 leads, body size 11.2 × 5.3 × 1.95 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; supports auto-incremented display RAM writes without external pull-ups in basic configurations |
| SCL (Pin 2) | I²C serial clock input | Drives internal timing; requires external pull-up; determines max I²C data rate (≤100 kHz at fclk ≥125 kHz) |
| SYNC (Pin 3) | Cascade synchronization I/O | Outputs frame sync signal when master; inputs sync when slave; ensures phase alignment across daisy-chained devices |
| CLK (Pin 4) | External clock input / internal clock output | Configured as output (OSC=VSS) to drive downstream PCF8576C CLK pins; or as input (OSC=VDD) for precise system clock control |
| VDD (Pin 5) | Logic supply voltage | Powers internal logic, I²C interface, and RAM; range 2–6 V allows direct use with Li-ion or alkaline battery rails |
| OSC (Pin 6) | Oscillator enable control | Logic-low selects internal RC oscillator (~31 kHz or ~200 kHz); logic-high enables external clock source on CLK pin |
| A0–A2 (Pins 7–9) | Hardware subaddress inputs | Set 3-bit device address for I²C arbitration and RAM write targeting in multi-device systems |
| SA0 (Pin 10) | I²C bus address bit 0 | Combines with A0–A2 to define full 7-bit I²C slave address; enables up to 8 uniquely addressed devices on same bus |
| VSS (Pin 11) | Ground reference | Common return for logic and LCD drive circuitry; substrate tied to VDD and must be electrically isolated |
| VLCD (Pin 12) | LCD supply voltage | Independent bias rail; sets full-scale LCD voltage (VDD − VLCD); externally temperature-compensatable for stable contrast |
| BP0–BP3 (Pins 13–16) | LCD backplane outputs | Drive up to 4 backplanes; configurable for parallel pairing in lower-mux modes to increase current drive capability |
| S0–S39 (Pins 17–56) | LCD segment outputs | 40 dedicated CMOS outputs; directly connect to LCD segments; unused pins left open-circuit |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LCD bias generator | Eliminates external resistive divider or charge pump; provides 1/2 or 1/3 bias via internal switched resistor network |
| Auto-incremented RAM addressing | Reduces I²C transaction count during bulk display updates; pointer increments by 2–8 based on mux mode |
| Hardware subaddressing (A0–A2) | Enables up to 8 PCF8576C devices on one I²C bus without address conflicts or software address management |
| Power-saving mode | Reduces internal clock division ratio by 6×, cutting dynamic power significantly while maintaining display refresh integrity |
| Cascadable SYNC architecture | Ensures deterministic frame timing across multiple devices; avoids display flicker or misalignment in large-panel designs |
Applications
| Industrial Panel Meters | Consumer Remote Controls |
|---|---|
Use Scenario: Digital panel meter displaying voltage, current, or temperature readings with 4-digit numeric + status icons. IC Role / Device Role / Timing Role: Primary LCD controller driving 16-segment + icon segments; manages static or 1:2 multiplex waveforms and bias generation. Use Value: Eliminates need for external bias circuitry and microcontroller GPIO expansion; reduces BOM count and layout area. | Use Scenario: IR remote control with 2-line alphanumeric LCD showing channel, volume, and battery status. IC Role / Device Role / Timing Role: Standalone LCD driver handling all segment/backplane timing; interfaces via I²C to low-pin-count MCU. Use Value: Enables ultra-low-power operation using power-saving mode and 2–3 V VDD; extends alkaline battery life beyond 1 year. |
| Medical Diagnostic Handhelds | Smart Energy Meters |
Use Scenario: Portable blood glucose monitor with 14-segment alphanumeric display and warning indicators. IC Role / Device Role / Timing Role: Dedicated LCD driver supporting 1:3 multiplex mode for higher segment density; handles blinking and contrast calibration. Use Value: Internal 1/3 bias and VLCD adjustability ensure consistent readability across operating temperatures. | Use Scenario: DIN-rail mounted electricity meter with multi-line LCD showing kWh, tariff, and event logs. IC Role / Device Role / Timing Role: Cascaded PCF8576CTT/1,118 devices driving >100-segment display; synchronized via SYNC pins. Use Value: Hardware subaddressing and auto-wrap RAM loading simplify firmware for large display updates across multiple ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD controller and driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF8576CHL/1,118 | LQFP64 package (10×10 mm); 64-pin footprint vs. VSO56's 56-pin; identical electrical specs and functionality | Preferred for PCBs requiring larger pitch, thermal relief, or manual assembly; not drop-in compatible due to different land pattern | Select PCF8576CHL/1,118 when board space permits larger package or reworkability is prioritized over compactness. |
| PCF8576CU/2/F2,026 | Bare die (56-bump, 3.2×2.92 mm); no package parasitics; requires custom COB or flip-chip integration | Targeted for ultra-compact, high-volume modules where cost and size outweigh assembly complexity | Choose PCF8576CU/2/F2,026 only for embedded module designs with qualified die-bonding processes and thermal management. |
Compared with PCF8576CTT/1,118, the LQFP64 variant offers easier prototyping and thermal dissipation but increases PCB area, while the bare die version eliminates packaging entirely at the cost of assembly infrastructure - both retain identical timing, RAM, and drive capabilities.
Availability
PCF8576CTT/1,118 is available at Aetrix Electronics and suitable for industrial panel meters, consumer remote controls, medical handhelds, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for PCF8576CTT/1,118 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 company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in interface, power management, and display driver technologies.
The PCF8576C product line delivers universal LCD driver ICs optimized for low-multiplex-rate character and segment displays in cost-sensitive, battery-powered, and space-constrained embedded systems.
FAQ
What is the maximum LCD element count supported by the PCF8576CTT/1,118?
The PCF8576CTT/1,118 supports up to 160 LCD elements (40 segments × 4 backplanes). This enables configurations such as twenty 7-segment characters, ten 14-segment characters, or arbitrary graphics layouts. When cascaded with additional PCF8576C devices, the total scalable capacity reaches 2560 elements, as confirmed in the official NXP datasheet Rev. 13.
Does the PCF8576CTT/1,118 require external components for LCD bias generation?
No, the PCF8576CTT/1,118 integrates a complete LCD bias generator with internal voltage-follower buffers and a switchable resistor network. It supports 1/2 and 1/3 bias configurations without external resistors or capacitors - a key feature explicitly stated in the NXP datasheet Section 2 "Features and benefits".
How does the PCF8576CTT/1,118 handle I²C communication in multi-device systems?
The PCF8576CTT/1,118 uses hardware subaddressing via pins A0–A2 and SA0 to set a unique 7-bit I²C slave address, allowing up to eight devices on one bus. Its auto-incremented addressing and subaddress counter ensure correct RAM writes without software intervention - a capability verified in Section 6.2 and Table 4 of the NXP datasheet.
What are the power supply requirements for the PCF8576CTT/1,118?
The PCF8576CTT/1,118 requires two independent supplies: VDD (2–6 V) for logic and I²C interface, and VLCD (adjustable) for LCD bias. The wide VDD range enables direct operation from single-cell lithium or dual-cell alkaline batteries, as specified in Section 2 and Table 6 of the NXP datasheet.
Can the PCF8576CTT/1,118 drive a static LCD display?
Yes, the PCF8576CTT/1,118 fully supports static (1:1) LCD drive mode with selectable 1/2 or 1/3 bias, delivering Von(RMS) = VLCD and Voff(RMS) = 0 V. Its static mode operation, including waveform definitions and bias selection, is documented in Sections 7.4.1 and 7.3 of the NXP datasheet Rev. 13.
PCF8576CTT/1,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 56-TFSOP (0.240", 6.10mm Width) Exposed Pad
- 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-HTSSOP
PCF8576CTT/1,118 FAQ
1.How can I place an order for PCF8576CTT/1,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCF8576CTT/1,118 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 PCF8576CTT/1,118 reliable?
The price and inventory of PCF8576CTT/1,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCF8576CTT/1,118 is usually 5 days.
3.What payment methods are accepted for PCF8576CTT/1,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCF8576CTT/1,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCF8576CTT/1,118?
PCF8576CTT/1,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCF8576CTT/1,118 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 PCF8576CTT/1,118?
For technical support, including PCF8576CTT/1,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCF8576CTT/1,118 requirements.
6.How does Aetrix verify that PCF8576CTT/1,118 is sourced from the original manufacturer or authorized distributors?
All PCF8576CTT/1,118 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 PCF8576CTT/1,118 meets industry standards.
7.What is the process for return or replacement of PCF8576CTT/1,118?
All PCF8576CTT/1,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCF8576CTT/1,118, 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 PCF8576CTT/1,118 part is unused and in its original packaging.
Return procedure for PCF8576CTT/1,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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