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NXP Semiconductors PCA8547AHT/AY
- Part No.:
- PCA8547AHT/AY
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 64-TQFP
- Datasheet:
-
PCA8547AHT/AY.pdf
- Description:
- IC DRVR 7 SEGMENT 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,679
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Product details
Overview
PCA8547AHT/AY from NXP Semiconductors is an AEC-Q100 qualified automotive LCD driver IC designed for high-contrast Vertical Alignment (VA) displays with up to 1:4 multiplexing. It drives up to 4 backplanes and 44 segments (176 elements), integrates an on-chip charge pump generating up to 9 V LCD supply, and supports 400 kHz I²C-bus interface for microcontroller connectivity in instrument clusters and climate control units.
For engineers reviewing the PCA8547AHT/AY datasheet, PCA8547AHT/AY pinout, PCA8547AHT/AY application, or PCA8547AHT/AY equivalent, key selection criteria include its programmable temperature-compensated VLCD generation, dual RAM bank architecture for flicker-free display updates, factory-calibrated 60–300 Hz frame frequency, integrated temperature sensor with readout capability, and support for static/2BP/4BP drive configurations.
Technical Context
The PCA8547AHT/AY implements a fully integrated LCD peripheral controller with internal oscillator timing, configurable bias (1/2, 1/3, 1/4) and multiplex mode (static, 1:2, 1:4), and line-inversion or frame-inversion drive schemes. Its internal charge pump uses on-chip capacitors to generate VLCD up to 9 V from VDD2, while temperature compensation applies four-region slope programming (SLA–SLD) for stable contrast across –40 °C to +105 °C.
It features two independent 45-byte display RAM banks with bank-select command (IBS/OBS bits), enabling seamless background data loading while displaying from the active bank. The I²C interface operates at 400 kHz with standard 7-bit slave addressing (A0 pin selectable), and all configuration commands-including OTP refresh, oscillator control, and VPR setting-are executed via dedicated 8-bit opcodes with fixed bit patterns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LCD Drive Capacity | 4 backplanes × 44 segments = 176 elements; supports static, 1:2, or 1:4 multiplex VA LCDs |
| Interface | 400 kHz I²C-bus (PCA8547A variant); A0 pin selects slave address (0x70 or 0x71) |
| VLCD Generation | On-chip charge pump with 2× or 3× multiplication; programmable output 3–9 V via VPR[7:0] |
| Frame Frequency | 60–300 Hz in 10 Hz steps; factory-calibrated ±15%; output clock duty cycle varies per setting (e.g., 20:80 at 60 Hz) |
| Temperature Compensation | Four-region programmable slope (SLA–SLD); supports both negative and positive coefficients for optimal contrast stability |
| Supply Ranges | Digital: 1.8–5.5 V (VDD1/VDD2); LCD: 2.5–9.0 V (VLCD); VSS referenced ground |
| Operating Temperature | –40 °C to +105 °C; AEC-Q100 Grade 2 qualified for automotive use |
Pinout & Package
TQFP64 package (SOT357-1), 10 mm × 10 mm × 1.0 mm body, lead pitch 0.5 mm, exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–32, 53–64 (S0–S31, S32–S43) | LCD segment outputs | Drive up to 44 segment lines; grouped across two physical pin blocks for PCB routing flexibility |
| 45–48 (BP0–BP3) | LCD backplane outputs | Drive up to 4 backplanes; configured via Set-MUX-mode command (M[2:0] = 100 for 1:4) |
| 33 (RESET) | Active-low hardware reset input | Asynchronous reset; RAM contents retained; requires Initialize command post-reset |
| 34 (SDA) | I²C bidirectional data line | Open-drain, requires external pull-up; supports standard-mode (100 kHz) and fast-mode (400 kHz) |
| 35 (SCL) | I²C clock input | Drives internal timing; no internal pull-up; synchronizes all I²C transfers |
| 36 (A0) | Slave address LSB | Selects I²C address: 0x70 (A0 = low) or 0x71 (A0 = high) |
| 41 (VSS) | Ground reference | Common return for digital and analog domains; must be low-impedance connection |
| 42 (VDD1) | Digital core supply | Powers logic, I²C interface, and RAM; range 1.8–5.5 V |
| 43 (VDD2) | Charge pump supply | Input for internal VLCD generation; same range as VDD1; VLCD ≥ VDD2 |
| 44 (VLCD) | LCD supply terminal | Output when charge pump enabled; input when external VLCD used; must be ≥ VDD2 |
| 39 (CLK) | Oscillator I/O | Configurable as internal oscillator output (COE=1) or external clock input (OSC=1) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated charge pump with internal capacitors | Eliminates need for external boost components; enables single-supply operation with VLCD up to 9 V |
| Programmable temperature compensation (SLA–SLD) | Maintains consistent LCD contrast over full automotive temperature range without external thermistor network |
| Dual-display RAM banks (Bank 0/Bank 1) | Enables flicker-free display updates by writing new content to inactive bank while active bank drives display |
| Factory-calibrated frame frequency (60–300 Hz) | Reduces system-level timing calibration effort; ±15% accuracy eliminates need for external crystal or trim capacitor |
| On-chip temperature sensor with digital readout | Provides real-time die temperature for closed-loop VLCD adjustment or system thermal monitoring |
| AEC-Q100 Grade 2 qualification | Validated for automotive under-hood and cabin environments including thermal cycling, vibration, and ESD robustness |
Applications
| Instrument Cluster | Car Radio Display |
|---|---|
Use Scenario: Driving information display with speed, RPM, fuel level, and warning indicators in modern automotive dashboards. IC Role / Device Role / Timing Role: Primary LCD segment driver managing 4 backplanes and up to 44 segments; handles bias, multiplex timing, and VLCD regulation. Use Value: Enables high-contrast VA LCD readability under direct sunlight and wide viewing angles; temperature compensation ensures consistent legibility from –40 °C cold start to +85 °C summer operation. |
Use Scenario: Multi-function audio head unit display showing station name, track info, equalizer settings, and menu navigation. IC Role / Device Role / Timing Role: Dedicated display controller interfacing MCU via I²C; manages dual RAM banks for smooth scrolling text and icon transitions. Use Value: Reduces MCU firmware overhead via autonomous display refresh; built-in frame inversion minimizes power consumption during long idle periods. |
| Climate Control Panel | Driver Information Center |
Use Scenario: HVAC interface with numeric temperature setpoints, fan speed, air distribution, and mode icons on segmented LCD. IC Role / Device Role / Timing Role: Static or 1:2 multiplex driver supporting alphanumeric characters (e.g., "22°C", "AUTO") and custom symbols. Use Value: Programmable bias and multiplex mode allow optimization for low-threshold TN or high-threshold VA glass; internal VLCD generation simplifies BOM. |
Use Scenario: Centralized driver assistance display showing ADAS status, navigation prompts, and vehicle diagnostics in premium vehicles. IC Role / Device Role / Timing Role: High-reliability display driver with OTP-calibrated timing and temperature sensing for safety-critical visual feedback. Use Value: AEC-Q100 qualification and dual-bank RAM ensure deterministic behavior and zero display artifacts during system wake-up or mode transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF8576CT/1Y | 4 × 40 segment capacity; no integrated temperature sensor; 200 kHz I²C max; VLCD up to 6.5 V only | Lacks programmable temperature compensation and frame inversion; suitable for non-automotive consumer panels | Choose for cost-sensitive non-automotive designs where contrast stability over temperature is less critical |
| RA8835-GN | Parallel interface only; no I²C/SPI; supports graphic LCDs up to 128 × 64; no internal charge pump | Requires external DC-DC for VLCD; targets monochrome graphic displays, not segment-based automotive UIs | Choose only when migrating from segment to dot-matrix LCDs and external power management is acceptable |
Compared with PCF8576CT/1Y and RA8835-GN, the PCA8547AHT/AY uniquely combines AEC-Q100 qualification, on-chip temperature-sensing with four-region compensation, and dual-bank RAM in a 4×44 segment driver-making it the only option that meets full automotive instrument cluster requirements without external analog support circuitry.
Availability
PCA8547AHT/AY is available at Aetrix Electronics and suitable for instrument cluster, car radio, and climate control units requiring stable component supply across extended automotive temperature ranges and long production lifecycles.
Supply support for PCA8547AHT/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, with deep expertise in mixed-signal and power-efficient interface ICs.
The PCA8547 belongs to NXP's automotive-grade LCD driver product line, engineered specifically for high-reliability, temperature-stable segment driving in safety-critical vehicle human-machine interfaces.
FAQ
What interface protocol does the PCA8547AHT/AY support?
The PCA8547AHT/AY supports a 400 kHz I²C-bus interface with 7-bit slave addressing. Pin A0 selects between addresses 0x70 and 0x71. It does not support SPI - that functionality is exclusive to the PCA8547BHT variant. All register access, configuration, and display data writes occur through standardized I²C transactions using dedicated command opcodes defined in the datasheet.
How does the PCA8547AHT/AY achieve stable LCD contrast across temperature?
The PCA8547AHT/AY achieves stable contrast using an integrated temperature sensor and programmable four-region temperature compensation (SLA–SLD coefficients). These coefficients adjust the VLCD voltage in real time based on measured die temperature, counteracting LCD threshold voltage drift. This eliminates the need for external thermistors or manual calibration, ensuring consistent readability from –40 °C to +105 °C.
Can the PCA8547AHT/AY drive both static and multiplexed LCDs?
Yes, the PCA8547AHT/AY supports static, 1:2, and 1:4 multiplex drive modes via the Set-MUX-mode command (M[2:0]). In static mode, it drives 1 backplane and 44 segments; in 1:4 mode, it drives 4 backplanes and 44 segments (176 total elements). Bias configuration (1/2, 1/3, 1/4) is independently programmable to match LCD glass requirements.
What is the purpose of the dual RAM banks in the PCA8547AHT/AY?
The PCA8547AHT/AY includes two independent 45-byte display RAM banks (Bank 0 and Bank 1). This allows the host MCU to write updated display data to the inactive bank while the active bank continues driving the LCD - eliminating visible flicker during dynamic content changes such as scrolling text or animated icons in automotive HMI applications.
Does the PCA8547AHT/AY require external capacitors for its charge pump?
No, the PCA8547AHT/AY uses internal capacitors for its charge pump and requires no external flying or reservoir capacitors. The charge pump generates VLCD up to 9 V from VDD2 using on-chip capacitance. However, an external 100 nF capacitor on VLCD is recommended for noise filtering and transient stabilization, especially during startup.
PCA8547AHT/AY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 64-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Display Type:
- LCD
- Configuration:
- 7 Segment + DP, 14 Segment + DP + AP, Dot Matrix
- Interface:
- I2C
- Digits or Characters:
- 11 Characters, 22 Characters, 176 Elements
- Current - Supply:
- 90 µA
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 95°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-TQFP (10x10)
PCA8547AHT/AY FAQ
1.How can I place an order for PCA8547AHT/AY through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA8547AHT/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 PCA8547AHT/AY reliable?
The price and inventory of PCA8547AHT/AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA8547AHT/AY is usually 5 days.
3.What payment methods are accepted for PCA8547AHT/AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA8547AHT/AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA8547AHT/AY?
PCA8547AHT/AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA8547AHT/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 PCA8547AHT/AY?
For technical support, including PCA8547AHT/AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA8547AHT/AY requirements.
6.How does Aetrix verify that PCA8547AHT/AY is sourced from the original manufacturer or authorized distributors?
All PCA8547AHT/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 PCA8547AHT/AY meets industry standards.
7.What is the process for return or replacement of PCA8547AHT/AY?
All PCA8547AHT/AY units undergo pre-shipment inspection (PSI). If there is an issue with PCA8547AHT/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 PCA8547AHT/AY part is unused and in its original packaging.
Return procedure for PCA8547AHT/AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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