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NXP Semiconductors PCA8547BHT/AY
- Part No.:
- PCA8547BHT/AY
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 64-TQFP
- Datasheet:
-
PCA8547BHT/AY.pdf
- Description:
- IC DRVR 7 SEGMENT 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,372
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Product details
Overview
PCA8547BHT/AY from NXP Semiconductors is an automotive-grade LCD segment driver IC designed for 1:4 multiplexed VA-type displays, supporting up to 4 backplanes and 44 segments (176 total elements). It integrates an on-chip charge pump generating up to 9 V LCD supply, programmable temperature-compensated VLCD, dual RAM banks, and a 5 MHz SPI interface. It is used in instrument clusters where stable contrast across -40°C to +105°C is critical.
For engineers reviewing the PCA8547BHT/AY datasheet, PCA8547BHT/AY pinout, PCA8547BHT/AY application, or PCA8547BHT/AY equivalent, this page delivers verified technical context, exact pin functions, real-world automotive use cases, and validated alternative options - all grounded in NXP's Rev. 2 (2015) product data sheet.
Technical Context
The PCA8547BHT/AY implements a dedicated SPI-bus interface (CE, SCL, SDIO) with 5 MHz clock support and operates with two independent power domains: VDD1 (1.8–5.5 V digital logic) and VDD2 (charge pump input). Its internal oscillator drives frame timing and charge pump operation, with factory-calibrated frame frequency selection (60–300 Hz in 10 Hz steps).
It features integrated temperature sensing and four-region programmable temperature compensation (SLA–SLD coefficients), enabling precise VLCD adjustment across industrial temperature ranges. Display memory uses two 46-byte RAM banks with bank-select control, allowing seamless background updates without display flicker.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LCD Drive Capability | 4 backplanes × 44 segments = 176 elements; supports static, 1:2, or 1:4 multiplex modes |
| Interface Type | SPI-bus (CE, SCL, SDIO); 5 MHz max clock rate; no I²C support (PCA8547A variant only) |
| VLCD Generation | On-chip charge pump with 2× or 3× multiplication; programmable output 3–9 V via VPR[7:0] |
| Frame Frequency | Software-configurable 60–300 Hz in 10 Hz steps; factory-calibrated ±15% accuracy |
| Temperature Compensation | Four-region (SFA–SFD) programmable slope (±) with SLA/SLB/SLC/SLD coefficients |
| Supply Voltage Range | VDD1: 1.8–5.5 V (digital core); VDD2: matches VLCD input requirement for charge pump |
| Operating Temperature | -40°C to +105°C; AEC-Q100 Grade 2 qualified for automotive applications |
Pinout & Package
PCA8547BHT/AY is housed in a TQFP64 package (SOT357-1), 10 mm × 10 mm × 1.0 mm body, with exposed thermal pad (not electrically connected). Pin functions are specific to the PCA8547B variant and differ from PCA8547A in serial interface pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–32, 53–64 (S0–S31, S32–S43) | LCD segment outputs | Drive 44 total segment lines; grouped across two physical pin blocks for PCB layout routing |
| 45–48 (BP0–BP3) | LCD backplane outputs | Drive up to 4 backplanes in 1:4 multiplex mode; outputs active during frame generation |
| 33 (RESET) | Active-low reset input | Asynchronous hardware reset; preserves RAM content but requires Initialize command post-reset |
| 34 (CE) | SPI chip enable | Active-low signal enabling SPI communication; must be asserted before SCL/SDIO activity |
| 35 (SCL) | SPI serial clock input | Master-generated clock up to 5 MHz; synchronous edge-triggered data transfer |
| 36 (SDIO) | SPI bidirectional data I/O | Half-duplex SPI data line; direction controlled by internal state machine per command |
| 41 (VSS) | Ground reference | Digital and analog ground common node; requires low-impedance connection to PCB ground plane |
| 42 (VDD1) | Digital supply | Powers logic, SPI interface, and RAM; range 1.8–5.5 V; decoupling capacitor required |
| 43 (VDD2) | Charge pump supply | Input for internal voltage multiplier; typically tied to VDD1 or separate low-noise source |
| 44 (VLCD) | LCD supply terminal | Output of internal charge pump (or external input if CPE=0); must be ≥ VDD2 |
| 39 (CLK) | Oscillator I/O | Configurable as internal oscillator output or external clock input (OSC bit dependent) |
| 37–38, 40 (T1–T3) | Test pins | Factory test only; must be tied to VSS in production designs; no user functionality |
Key Features
| Feature | Design Value |
|---|---|
| Integrated charge pump with internal capacitors | Eliminates need for external flying capacitors; enables compact 9 V VLCD generation from single low-voltage rail |
| Programmable temperature compensation (4 regions) | Maintains consistent LCD contrast over full -40°C to +105°C range without external sensor or firmware compensation |
| Dual-display RAM banks | Enables flicker-free display updates: write new content to Bank 1 while Bank 0 drives active display |
| On-chip temperature sensor with readout | Provides calibrated digital temperature value (TD[7:0]) for system diagnostics or adaptive UI behavior |
| Factory-calibrated frame frequency | Reduces system-level timing validation effort; eliminates need for external crystal or RC tuning |
| AEC-Q100 Grade 2 qualification | Validated for under-hood automotive environments including thermal cycling, vibration, and ESD robustness |
Applications
| Instrument Cluster | Car Radio Display |
|---|---|
Use Scenario: Driving dashboard with speed, RPM, fuel, and warning indicators rendered on segmented VA-LCD. IC Role / Device Role / Timing Role: Primary LCD controller/driver managing segment activation, bias, frame inversion, and temperature-compensated VLCD. Use Value: Ensures legible, high-contrast display at extreme ambient temperatures without microcontroller intervention. |
Use Scenario: Infotainment head unit displaying station name, time, audio settings, and menu navigation on alphanumeric LCD. IC Role / Device Role / Timing Role: Offloads microcontroller from real-time waveform generation; handles 14-segment character rendering and blinking control. Use Value: Reduces host CPU load and simplifies firmware by handling display RAM management and bank switching autonomously. |
| Climate Control Unit | Driver Information Center |
Use Scenario: HVAC panel showing temperature setpoint, fan speed, air mode, and recirculation status on small-format segmented LCD. IC Role / Device Role / Timing Role: SPI-driven display controller with integrated bias generation and programmable frame frequency for flicker suppression. Use Value: Enables reliable, low-power display operation in thermally unstable cabin environments using on-chip temperature compensation. |
Use Scenario: Centralized driver display showing navigation prompts, ADAS alerts, and vehicle status on multi-line segmented LCD. IC Role / Device Role / Timing Role: Dual-bank RAM display engine supporting dynamic content updates without visual artifacts during scrolling or animation. Use Value: Delivers smooth UI transitions and real-time data refresh while maintaining AEC-Q100 compliance and EMC robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA8547AHT/AY | I²C interface (400 kHz), different pinout (SDA/SCL vs CE/SCL/SDIO); identical core functionality and package | Used where microcontroller has limited GPIO but available I²C bus; not SPI-compatible | Select PCA8547AHT/AY only when I²C is preferred and PCB layout accommodates pin mapping change |
| PCF8576CT/1Y | 40-segment × 4-backplane; no integrated charge pump; requires external VLCD supply; I²C-only interface | Suitable for cost-sensitive non-automotive applications with simpler bias requirements and external voltage sources | Choose PCF8576CT/1Y only if charge pump and AEC-Q100 are unnecessary and external VLCD is already available |
Compared with PCA8547AHT/AY, the PCA8547BHT/AY provides SPI-native control and distinct pin assignment, while PCF8576CT/1Y lacks on-chip voltage generation and automotive qualification - making PCA8547BHT/AY the sole option for SPI-based, self-contained, AEC-Q100-compliant VA-LCD driving.
Availability
PCA8547BHT/AY is available at Aetrix Electronics and suitable for instrument cluster, car radio, and climate control units requiring stable component supply, long-term automotive lifecycle support, and guaranteed traceable sourcing.
Supply support for PCA8547BHT/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 display interface IP.
The PCA8547 series was developed specifically for automotive LCD instrumentation, emphasizing robustness, integrated power management, and temperature-stable contrast - targeting high-reliability human-machine interface subsystems.
FAQ
What interface does the PCA8547BHT/AY support?
The PCA8547BHT/AY supports only the SPI interface (CE, SCL, SDIO pins) operating up to 5 MHz. It does not support I²C - that functionality is exclusive to the PCA8547AHT/AY variant. The SPI protocol is half-duplex and command-driven, with register access defined in Tables 5–23 of the NXP datasheet.
Does the PCA8547BHT/AY include an integrated charge pump?
Yes, the PCA8547BHT/AY includes a software-programmable internal charge pump capable of generating VLCD voltages from 3 V to 9 V using internal capacitors. The multiplication factor (2× or 3×) and target voltage are set via the Charge-pump-ctrl and Set-VPR commands per Section 8.1.4 and 8.1.7 of the datasheet.
How is temperature compensation implemented in the PCA8547BHT/AY?
The PCA8547BHT/AY implements four-region programmable temperature compensation (SFA–SFD) using SLA/SLB/SLC/SLD coefficients stored in dedicated registers. These coefficients adjust VLCD slope (positive or negative) per region, based on readings from its integrated temperature sensor - all configured via Temp-comp commands without host MCU calculation.
What is the maximum number of LCD elements the PCA8547BHT/AY can drive?
The PCA8547BHT/AY drives up to 176 LCD elements: configured as 4 backplanes × 44 segments in 1:4 multiplex mode, or 2 backplanes × 44 segments (1:2), or 1 backplane × 44 segments (static). This supports up to 22 seven-segment characters or 11 fourteen-segment alphanumeric displays per the NXP datasheet Section 2.
Is the PCA8547BHT/AY qualified for automotive use?
Yes, the PCA8547BHT/AY is AEC-Q100 Grade 2 qualified (-40°C to +105°C), with built-in features essential for automotive reliability: on-chip temperature sensing, factory-calibrated timing, robust ESD protection, and validated operation across thermal and voltage extremes per NXP's official qualification report.
PCA8547BHT/AY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 64-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Display Type:
- LCD
- Configuration:
- 7 Segment + DP, 14 Segment + DP + AP, Dot Matrix
- Interface:
- SPI
- 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)
PCA8547BHT/AY FAQ
1.How can I place an order for PCA8547BHT/AY through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA8547BHT/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 PCA8547BHT/AY reliable?
The price and inventory of PCA8547BHT/AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA8547BHT/AY is usually 5 days.
3.What payment methods are accepted for PCA8547BHT/AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA8547BHT/AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA8547BHT/AY?
PCA8547BHT/AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA8547BHT/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 PCA8547BHT/AY?
For technical support, including PCA8547BHT/AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA8547BHT/AY requirements.
6.How does Aetrix verify that PCA8547BHT/AY is sourced from the original manufacturer or authorized distributors?
All PCA8547BHT/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 PCA8547BHT/AY meets industry standards.
7.What is the process for return or replacement of PCA8547BHT/AY?
All PCA8547BHT/AY units undergo pre-shipment inspection (PSI). If there is an issue with PCA8547BHT/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 PCA8547BHT/AY part is unused and in its original packaging.
Return procedure for PCA8547BHT/AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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