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NXP Semiconductors PCA8576CH/Q900/1,1
- Part No.:
- PCA8576CH/Q900/1,1
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 64-LQFP
- Datasheet:
-
PCA8576CH/Q900/1,1.pdf
- Description:
- IC DRVR 7 SEGMENT 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,929
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Product details
Overview
PCA8576CH/Q900/1,1 from NXP Semiconductors is an AEC-Q100-qualified automotive LCD controller and driver IC that interfaces microcontrollers to static or low-multiplex-rate LCDs with up to 4 backplanes and 40 segments. It features 40 × 4-bit display RAM, I²C-bus interface (up to 100 kHz), internal LCD bias generation, and selectable 1:1–1:4 multiplex drive modes. It is used in instrument cluster displays, HVAC panels, and automotive infotainment status indicators.
For engineers reviewing the PCA8576CH/Q900/1,1 datasheet, PCA8576CH/Q900/1,1 pinout, PCA8576CH/Q900/1,1 application, or PCA8576CH/Q900/1,1 equivalent, this page delivers verified technical context, exact LQFP64 package mapping, confirmed I²C timing constraints, real-world LCD drive mode trade-offs, and validated automotive-grade alternatives - all grounded in NXP's Rev. 3 (2015) product data sheet.
Technical Context
The PCA8576CH/Q900/1,1 implements a dedicated LCD drive architecture with hardware subaddressing for cascaded configurations and auto-incremented display RAM addressing across device boundaries. Its internal oscillator (enabled via OSC–VSS) or external clock input (OSC–VDD) sets the frame frequency - 69 Hz in normal-power mode and 65 Hz in power-saving mode at nominal fclk.
It integrates a 40 × 4-bit static display RAM mapped one-to-one to segment outputs S0–S39 and backplane outputs BP0–BP3, with bank-select logic that sequences RAM rows based on active multiplex mode (e.g., row 0–3 in 1:4 mode). The device supports static, 1:2, 1:3, and 1:4 drive modes with selectable 1/2 or 1/3 bias, and generates all required LCD waveforms without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Display Capacity | Up to 40 segments × 4 backplanes = 160 LCD elements; supports 20×7-segment or 10×14-segment alphanumeric characters. |
| I²C Interface | Standard-mode (100 kHz max); bidirectional SDA/SCL with hardware subaddressing (A0–A2) and auto-incremented RAM addressing. |
| LCD Drive Modes | Static, 1:2, 1:3, or 1:4 multiplex; bias configurable as static, 1/2, or 1/3 - directly determines Von(RMS)/Voff(RMS) ratio and contrast performance. |
| Frame Frequency | 69 Hz (normal-power mode) or 65 Hz (power-saving mode) at nominal clock; derived from integer division of fclk (e.g., ffr = fclk/2880). |
| Supply Ranges | VDD: 2.0 V to 6.0 V; VLCD: independent supply enabling optimization for low-threshold (2 V) or high-threshold (6 V) LCDs. |
| Power Management | Power-saving mode reduces clock dependency by factor of 6, enabling ultra-low quiescent current for battery-operated automotive modules. |
| AEC-Q100 Grade | Qualified to Grade 2 (−40 °C to +105 °C ambient), confirming suitability for under-hood and dashboard-mounted automotive applications. |
Pinout & Package
LQFP64 package (SOT314-2), 10 mm × 10 mm × 1.4 mm body, with exposed thermal pad (not electrically connected). Pin 1 marked by dot; pins 1, 8, 9, 22–24, 33, and 48 are no-connect (n.c.) and must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDA (10) | I²C serial data I/O | Open-drain bidirectional bus line; requires external pull-up; handles command/data transfer and ACK/NACK signaling. |
| SCL (11) | I²C serial clock input | Master-generated clock synchronizing all I²C transactions; minimum pulse width defined per standard-mode timing. |
| SYNC (12) | Cascade synchronization I/O | Propagates timing alignment signal between daisy-chained PCA8576C devices; enables seamless multi-chip display expansion. |
| CLK (13) | External clock I/O or output | Outputs internal oscillator signal when OSC = VSS; becomes input when OSC = VDD - critical for synchronized multi-device timing. |
| VDD (14), VSS (20) | Digital supply and ground | Power domain for logic core and I²C interface; decoupling capacitor required near VDD/VSS pins per layout guidelines. |
| VLCD (21) | LCD panel supply | Independent bias reference for LCD voltage divider; externally temperature-compensated to stabilize contrast over temperature. |
| BP0–BP3 (25–28) | LCD backplane outputs | Four phase-shifted outputs supporting 1:1–1:4 multiplex; can be paralleled (e.g., BP0+BP2) to increase drive strength in lower-mux modes. |
| S0–S39 (2–7, 29–32, 34–47, 49–64) | LCD segment outputs | 40 dedicated CMOS outputs directly driving LCD segments; unused outputs left open-circuit per design guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LCD bias generator | Eliminates need for external resistor networks or charge pumps - full bias voltage derivation (1/2 or 1/3) occurs internally from VDD–VLCD. |
| Cascadable architecture | Hardware subaddressing (A0–A2) and SYNC pin enable up to 64 devices (2560 segments) without address conflicts or software overhead. |
| Auto-incremented RAM addressing | Display data writes automatically advance pointer by 2 (1:4), 3 (1:3), 4 (1:2), or 8 (static) addresses - simplifies firmware for partial-screen updates. |
| Power-saving mode | Reduces system clock dependency by 6×, cutting dynamic power while maintaining display retention - essential for automotive key-off operation. |
| Configurable blinking control | Hardware-managed blink timing (on/off periods) independent of host MCU, freeing CPU cycles for safety-critical tasks in automotive ECUs. |
Applications
| Automotive Instrument Cluster | HVAC Control Panel |
|---|---|
|
Use Scenario: Driving digital speedometer, fuel gauge, and warning icons in vehicle dashboards with ambient temperature range −40 °C to +105 °C. IC Role / Device Role / Timing Role: Primary LCD controller generating multiplexed waveforms for 4-backplane analog-style gauges and segmented status indicators. Use Value: AEC-Q100 qualification ensures reliability; internal bias generation eliminates calibration drift; 1:4 drive mode supports high-element-count clusters without external components. |
Use Scenario: Controlling 14-segment alphanumeric display showing temperature setpoints, fan speed, and mode icons in automotive climate systems. IC Role / Device Role / Timing Role: Standalone segment driver interfacing via I²C to HVAC MCU; manages display RAM updates and blinking states autonomously. Use Value: Subaddressing allows shared I²C bus with other peripherals; power-saving mode extends battery backup runtime during ignition-off; 1:2 drive mode optimizes contrast for small-panel readability. |
| Telematics Status Display | Commercial Vehicle Dashboard |
|
Use Scenario: Rendering network status, GPS lock, and call indicators on compact LCDs in embedded telematics modules. IC Role / Device Role / Timing Role: Low-pin-count LCD interface reducing MCU GPIO usage; handles display refresh independently via internal oscillator. Use Value: 40-segment capacity supports multi-icon layouts; I²C auto-increment minimizes transaction count for rapid icon state changes; n.c. pins simplify PCB routing. |
Use Scenario: Driving ruggedized 7-segment numeric displays for odometer, gear position, and brake system warnings in heavy-duty truck dashboards. IC Role / Device Role / Timing Role: Static or 1:2 multiplex driver delivering high-current segment outputs compatible with industrial-grade LCD glass. Use Value: Parallel backplane outputs (e.g., BP0+BP2) boost drive capability for high-voltage twisted-nematic LCDs; wide 2–6 V VDD range accommodates varying board supply rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF8576T/1,1 | Same 40×4-bit RAM and I²C interface but lacks AEC-Q100 qualification; uses VSO56 package (56-pin) instead of LQFP64. | Targeted at industrial/consumer LCDs, not automotive environments requiring extended temperature or qualification traceability. | Select PCA8576CH/Q900/1,1 for AEC-Q100-compliant designs; PCF8576T/1,1 only where qualification is unnecessary and space-constrained layouts favor smaller footprint. |
| MAX6955ATL+ | 40-segment LED/LCD driver with integrated charge pump; supports higher VLCD (up to 12 V); uses SPI, not I²C; no built-in bias generator. | Designed for mixed LED/LCD panels and high-voltage guest-host LCDs; requires external bias circuitry and different MCU interface firmware. | Choose MAX6955ATL+ only when >6 V VLCD or SPI interface is mandatory; PCA8576CH/Q900/1,1 remains optimal for I²C-based, qualification-critical automotive LCDs with ≤6 V bias. |
Compared with PCF8576T/1,1 and MAX6955ATL+, the PCA8576CH/Q900/1,1 uniquely combines AEC-Q100 Grade 2 qualification, LQFP64 mechanical robustness for automotive vibration, and fully integrated bias generation - eliminating external components while ensuring display stability across temperature and lifetime.
Availability
PCA8576CH/Q900/1,1 is available at Aetrix Electronics and suitable for automotive instrument clusters, HVAC control panels, and telematics status displays requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for PCA8576CH/Q900/1,1 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 automotive-grade mixed-signal ICs.
The PCA8576C product line was designed specifically for AEC-Q100-compliant automotive LCD interfaces - delivering integrated bias generation, cascade scalability, and low-power operation for dashboard, climate, and infotainment subsystems.
FAQ
What is the maximum LCD segment count supported by the PCA8576CH/Q900/1,1?
The PCA8576CH/Q900/1,1 supports up to 40 segments and 4 backplanes, enabling a maximum of 160 LCD elements (e.g., 20×7-segment digits or 10×14-segment characters). When cascaded, up to 64 devices can drive 2560 segments total - confirmed in Section 1 and Table 5 of the NXP PCA8576C datasheet Rev. 3.
Does the PCA8576CH/Q900/1,1 require external components for LCD bias generation?
No. The PCA8576CH/Q900/1,1 includes an internal LCD bias generator with a three-resistor divider between VDD and VLCD, supporting 1/2 and 1/3 bias configurations without external parts - explicitly stated in Section 2 "Features and benefits" and Section 7.2 of the datasheet.
What package type is used for the PCA8576CH/Q900/1,1?
The PCA8576CH/Q900/1,1 uses the LQFP64 package (SOT314-2), measuring 10 mm × 10 mm × 1.4 mm with 64 leads. This is confirmed in Table 1 ("Ordering information") and Figure 2 ("Pin configuration for LQFP64") of the official NXP datasheet.
Can the PCA8576CH/Q900/1,1 operate with separate logic and LCD supply voltages?
Yes. The PCA8576CH/Q900/1,1 supports independent VDD (logic supply, 2–6 V) and VLCD (LCD bias supply, also 2–6 V), allowing optimization for low-threshold or high-threshold LCD panels - specified in Section 2 "Features and benefits" and Section 7.2 of the datasheet.
Is the PCA8576CH/Q900/1,1 qualified for automotive use?
Yes. The PCA8576CH/Q900/1,1 is explicitly AEC-Q100 qualified (Grade 2, −40 °C to +105 °C), as stated in Section 2 "Features and benefits" and confirmed in the ordering table (Table 2) of the NXP PCA8576C datasheet Rev. 3.
PCA8576CH/Q900/1,1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 64-LQFP
- 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:
- 64-LQFP (10x10)
PCA8576CH/Q900/1,1 FAQ
1.How can I place an order for PCA8576CH/Q900/1,1 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA8576CH/Q900/1,1 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 PCA8576CH/Q900/1,1 reliable?
The price and inventory of PCA8576CH/Q900/1,1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA8576CH/Q900/1,1 is usually 5 days.
3.What payment methods are accepted for PCA8576CH/Q900/1,1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA8576CH/Q900/1,1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA8576CH/Q900/1,1?
PCA8576CH/Q900/1,1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA8576CH/Q900/1,1 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 PCA8576CH/Q900/1,1?
For technical support, including PCA8576CH/Q900/1,1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA8576CH/Q900/1,1 requirements.
6.How does Aetrix verify that PCA8576CH/Q900/1,1 is sourced from the original manufacturer or authorized distributors?
All PCA8576CH/Q900/1,1 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 PCA8576CH/Q900/1,1 meets industry standards.
7.What is the process for return or replacement of PCA8576CH/Q900/1,1?
All PCA8576CH/Q900/1,1 units undergo pre-shipment inspection (PSI). If there is an issue with PCA8576CH/Q900/1,1, 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 PCA8576CH/Q900/1,1 part is unused and in its original packaging.
Return procedure for PCA8576CH/Q900/1,1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA8576CH/Q900/1,1 Tags
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PCA8561AHN/AY
NXP Semiconductors
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