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NXP Semiconductors PCA8543AHL/AY
- Part No.:
- PCA8543AHL/AY
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 80-LQFP
- Datasheet:
-
PCA8543AHL/AY.pdf
- Description:
- PCA8543AHL - 4 x 60 automotive L
- Quantity:
- Payment:
- Shipping:
Inventory:433
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Product details
Overview
PCA8543AHL/AY from NXP Semiconductors is an automotive-grade LCD segment driver IC that interfaces microcontrollers to static or multiplexed LCDs with up to 4 backplanes and 60 segments (240 total elements). It integrates a programmable charge pump generating VLCD up to 3×VDD2, supports I²C-bus at 400 kHz, and operates across −40 °C to +105 °C for instrument clusters and climate control units.
For engineers reviewing the PCA8543AHL/AY datasheet, PCA8543AHL/AY pinout, PCA8543AHL/AY application, or PCA8543AHL/AY equivalent, key selection criteria include its AEC-Q100 Grade 2 compliance, dual-bank display RAM with auto-increment addressing, selectable frame frequency (60–300 Hz), integrated temperature sensor with readout, and linear temperature compensation of VLCD.
Technical Context
The PCA8543AHL/AY implements a dedicated LCD drive architecture with independent input/output RAM banks, enabling concurrent data loading and display refresh. Its internal oscillator-factory-calibrated to ±15% over voltage and temperature-feeds both the frame timing generator and charge pump clock.
Drive configuration is fully programmable: multiplex mode (static/2BP/4BP), bias ratio (1/2, 1/3, or 1/4), inversion scheme (line or frame), and VLCD generation (internal charge pump or external supply). Temperature compensation uses four user-selectable slope coefficients (SLA–SLD) applied to the on-chip sensor output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LCD Drive Capability | Up to 4 backplanes × 60 segments = 240 elements; supports 30×7-seg or 15×14-seg alphanumeric displays |
| I²C Interface Speed | 400 kHz maximum; compatible with standard-mode I²C-bus controllers without timing extension |
| Operating Temperature | −40 °C to +105 °C; qualified per AEC-Q100 Grade 2 for under-hood automotive use |
| Supply Voltage Range | VDD1/VDD2: 2.5 V to 5.5 V; VLCD: 2.5 V to 9.0 V (external) or up to 3×VDD2 (internal charge pump) |
| Frame Frequency | Programmable in 10 Hz steps from 60 Hz to 300 Hz; factory-calibrated ±15% across full temp/voltage range |
| On-Chip Resources | Integrated temperature sensor with digital readout; dual 60-byte display RAM banks; linear VLCD temp compensation |
| Charge Pump Output | Selectable 2× or 3× VDD2 multiplication; enables single-supply LCD bias generation without external components |
Pinout & Package
LQFP80 package (12 mm × 12 mm × 1.4 mm, SOT315-1); 80-pin quad flat lead frame with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S0–S59 | LCD segment outputs | 60 dedicated segment drivers; each sinks current to VSS during active phase |
| BP0–BP3 | LCD backplane outputs | 4 backplane drivers supporting static, 2BP, or 4BP multiplex configurations |
| VLCD | LCD supply voltage terminal | Output when internal charge pump enabled; input when external VLCD supplied |
| VDD1 | Digital/analog supply | Primary power for logic, RAM, I²C interface, and display controller (2.5–5.5 V) |
| VDD2 | Charge pump supply | Dedicated supply for internal charge pump (2.5–5.5 V); decoupled separately |
| VSS | Ground reference | Common return for all analog/digital circuits; low-impedance connection critical to minimize VLCD ripple |
| SCL/SDA | I²C-bus interface | Standard bidirectional I²C lines; support multi-master arbitration and clock stretching |
| A0, A1 | Slave address select | Set I²C slave address bits; enable up to four PCA8543AHL/AY devices on same bus |
Key Features
| Feature | Design Value |
|---|---|
| Dual-bank display RAM | Two independent 60-byte RAM banks allow background data loading while displaying from alternate bank-enabling flicker-free updates |
| Programmable charge pump | Configurable 2× or 3× VDD2 multiplication eliminates need for external high-voltage supplies; supports wide LCD threshold range (2.5–9.0 V) |
| Temperature-aware bias control | On-chip sensor + four user-selectable compensation slopes (SLA–SLD) maintain stable contrast across −40 °C to +105 °C |
| Flexible inversion schemes | Selectable line or frame inversion optimizes power vs. flicker trade-off: frame inversion reduces current by ~30% but may introduce visible flicker |
| Automotive qualification | AEC-Q100 Grade 2 certified; includes OTP-based factory calibration of oscillator, VLCD, and temperature sensor for production consistency |
Applications
| Instrument Cluster | Car Radio Display |
|---|---|
Use Scenario: Digital speedometer, fuel gauge, warning indicators, and trip computer in modern vehicle dashboards. IC Role / Device Role / Timing Role: Primary LCD segment driver managing up to 240 elements with real-time update via I²C from MCU. Use Value: AEC-Q100 Grade 2 rating ensures reliability at 105 °C ambient; integrated charge pump simplifies BOM by eliminating external DC-DC converter. |
Use Scenario: Multi-function audio head unit with alphanumeric status, track info, and menu navigation. IC Role / Device Role / Timing Role: Dedicated display controller handling concurrent segment updates and temperature-compensated contrast adjustment. Use Value: Dual RAM banks enable seamless UI transitions; frame-frequency tuning (60–300 Hz) suppresses flicker under varying lighting conditions. |
| Climate Control Panel | Driver Information Center |
Use Scenario: HVAC interface with numeric setpoints, fan speed, and mode icons in center console. IC Role / Device Role / Timing Role: Static or 2-backplane LCD driver with integrated bias generation and I²C command interface. Use Value: Wide VLCD range (2.5–9.0 V) supports both low-threshold glass and high-threshold automotive TN displays without redesign. |
Use Scenario: Reconfigurable driver display showing navigation prompts, ADAS alerts, and vehicle settings. IC Role / Device Role / Timing Role: High-reliability segment driver with temperature readout used for adaptive contrast and diagnostics. Use Value: On-chip temperature sensor provides real-time thermal feedback for display health monitoring and system-level thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD segment driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF8576CT/1/AY | Same LQFP80 package; 4×40 segment capability (160 elements); no integrated temperature sensor or linear VLCD compensation | Lower element count limits use to simpler displays (e.g., basic radio); lacks automotive temp compensation | Choose for cost-sensitive non-automotive applications requiring only 160 elements and no thermal adaptation |
| MAX6955ATL+T | 4×36 segment driver in 40-pin TQFN; integrated charge pump; I²C interface; no temperature sensor or frame-frequency tuning | Smaller footprint but lower drive capacity; no AEC-Q100 qualification; limited to commercial temp range (−40 °C to +85 °C) | Prefer for space-constrained consumer electronics where automotive qualification and 240-element support are unnecessary |
Compared with PCF8576CT/1/AY and MAX6955ATL+T, the PCA8543AHL/AY uniquely delivers AEC-Q100 Grade 2 compliance, 240-element drive capability, programmable frame frequency, and integrated temperature-sensing with linear VLCD compensation-making it the only option qualified for full-featured automotive instrument clusters.
Availability
PCA8543AHL/AY is available at Aetrix Electronics and suitable for instrument cluster, car radio, and climate control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PCA8543AHL/AY 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.
The PCA8543AHL/AY belongs to NXP's automotive LCD driver product line, engineered specifically for high-reliability, temperature-resilient dashboard and infotainment displays in vehicles.
FAQ
What is the maximum LCD element count supported by the PCA8543AHL/AY?
The PCA8543AHL/AY supports up to 240 LCD elements, achieved with 4 backplanes and 60 segments. This enables driving configurations such as 30 seven-segment alphanumeric characters, 15 fourteen-segment characters, or custom graphics layouts. The PCA8543AHL/AY achieves this using dedicated segment and backplane output drivers with programmable multiplexing modes.
Does the PCA8543AHL/AY require external capacitors for the internal charge pump?
Yes, the PCA8543AHL/AY requires external capacitors on VDD1, VDD2, and VLCD pins. The minimum recommended value is 100 nF per rail. Larger capacitors reduce VLCD ripple but increase charge time to reach target voltage. When VDD1 and VDD2 are externally tied, a single 200 nF capacitor suffices. These capacitors are mandatory for stable charge pump operation and flicker-free display performance.
How does the PCA8543AHL/AY handle temperature compensation of the LCD supply voltage?
The PCA8543AHL/AY integrates a calibrated temperature sensor and supports linear VLCD compensation using four user-programmable slope coefficients (SLA–SLD). Compensation is enabled via the temp-msr-ctrl command and applied automatically to maintain consistent display contrast across −40 °C to +105 °C. The PCA8543AHL/AY allows fine-tuning for specific LCD glass characteristics without external circuitry.
Can the PCA8543AHL/AY operate with an external clock source?
Yes, the PCA8543AHL/AY supports both internal and external clock sources. Pin CLK functions as oscillator output (internal mode) or input (external mode), selected via the oscillator-ctrl command. External clock operation allows synchronization with system timing or noise-sensitive environments. The PCA8543AHL/AY maintains full functionality-including frame frequency control and charge pump timing-regardless of clock source.
What is the purpose of the dual-bank display RAM in the PCA8543AHL/AY?
The PCA8543AHL/AY features two independent 60-byte display RAM banks to enable concurrent data loading and display output. While one bank drives the LCD, the other can be updated via I²C-eliminating visual artifacts during dynamic content changes. Bank selection is controlled by input-bank-select and output-bank-select commands, making the PCA8543AHL/AY ideal for responsive automotive UIs requiring smooth transitions.
PCA8543AHL/AY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 80-LQFP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Display Type:
- LCD
- Configuration:
- 7 Segment + DP, 14 Segment + DP + AP, Dot Matrix
- Interface:
- I2C
- Digits or Characters:
- 15 Characters, 30 Characters, 240 Elements
- Current - Supply:
- 250 µA
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 80-LQFP (12x12)
PCA8543AHL/AY FAQ
1.How can I place an order for PCA8543AHL/AY through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA8543AHL/AY 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 PCA8543AHL/AY reliable?
The price and inventory of PCA8543AHL/AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA8543AHL/AY is usually 5 days.
3.What payment methods are accepted for PCA8543AHL/AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA8543AHL/AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA8543AHL/AY?
PCA8543AHL/AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA8543AHL/AY 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 PCA8543AHL/AY?
For technical support, including PCA8543AHL/AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA8543AHL/AY requirements.
6.How does Aetrix verify that PCA8543AHL/AY is sourced from the original manufacturer or authorized distributors?
All PCA8543AHL/AY 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 PCA8543AHL/AY meets industry standards.
7.What is the process for return or replacement of PCA8543AHL/AY?
All PCA8543AHL/AY units undergo pre-shipment inspection (PSI). If there is an issue with PCA8543AHL/AY, 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 PCA8543AHL/AY part is unused and in its original packaging.
Return procedure for PCA8543AHL/AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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