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NXP Semiconductors PCA8546BTT/AJ
- Part No.:
- PCA8546BTT/AJ
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
PCA8546BTT/AJ.pdf
- Description:
- IC DRVR 176 SEGMENT 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,529
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Product details
Overview
PCA8546BTT/AJ from NXP Semiconductors is an automotive-grade 4-backplane, 176-segment LCD controller and driver with SPI interface, 1.8 V–5.5 V logic supply, 2.5 V–9 V LCD supply, and programmable 60–300 Hz frame frequency - used in climate control and dashboard displays.
For engineers reviewing the PCA8546BTT/AJ datasheet, PCA8546BTT/AJ pinout, PCA8546BTT/AJ application, or PCA8546BTT/AJ equivalent, this page delivers verified technical context, validated pin functions, confirmed AEC-Q100 Grade 3 compliance, and real-world automotive display integration requirements.
Technical Context
The PCA8546BTT/AJ implements a dedicated SPI-bus interface (CE, SCL, SDI) with 5 MHz clock support and integrates on-chip display RAM with auto-increment addressing to minimize MCU communication overhead. It uses a factory-calibrated internal oscillator or accepts external 9.6 kHz/230 kHz clocks via OSCCLK for precise frame timing.
It supports four backplane drive with configurable bias (1/2, 1/3, 1/4), line/frame inversion modes, and backplane swapping (BPS bit) to simplify PCB routing. Power-down mode disables outputs and halts the oscillator while retaining RAM content.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Interface | SPI-bus: CE (active-low chip enable), SCL (serial clock), SDI (data input) |
| Segment/Backplane Count | 176 segments driven across 4 backplanes - supports up to 22 alphanumeric 7-segment digits or full graphics panels |
| Logic Supply Range | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V, 3.3 V, or 5 V microcontrollers without level shifting |
| LCD Supply Range | 2.5 V to 9 V - accommodates diverse automotive LCD panel voltage requirements |
| Frame Frequency | 60 Hz to 300 Hz in ~10 Hz steps - factory-calibrated for stable flicker-free display operation |
| Operating Temperature | −40 °C to +95 °C - meets AEC-Q100 Grade 3 for under-hood and dashboard environments |
| Bias Configuration | Selectable 1/2, 1/3, or 1/4 bias - matches common multiplexed LCD panel architectures |
Pinout & Package
TSSOP56 package (SOT364-1), 56-pin plastic thin shrink small outline, 6.1 mm body width, lead pitch 0.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–11, 20–31, 48–56 | S0–S43 (segment outputs) | Drive individual LCD segment electrodes; pin mapping varies with BPS configuration |
| 12–15, 32–35 | BP0–BP3 (backplane outputs) | Generate multiplexed backplane waveforms; location swaps based on BPS bit setting |
| 40 | CE | SPI chip enable - active-low signal controlling SPI transaction initiation and bus arbitration |
| 41 | SCL | SPI serial clock input - synchronizes data sampling at up to 5 MHz |
| 42 | SDI | SPI serial data input - receives command and display RAM data from host MCU |
| 43 | RESET | Active-low asynchronous reset - clears internal state but preserves RAM contents |
| 44 | VSS | Digital ground reference for logic and interface circuitry |
| 45 | VDD | Logic supply input - powers internal registers, SPI controller, and RAM |
| 46 | OSCCLK | Configurable clock terminal - input for external 9.6 kHz/230 kHz clock or output for internal oscillator signal |
| 47 | VLCD | Independent LCD supply - decoupled from VDD to optimize contrast and power efficiency |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 3 qualification | Validated for automotive ambient temperatures (−40 °C to +95 °C) and reliability stress testing |
| On-chip 176-byte display RAM | Eliminates need for external memory; auto-increment addressing reduces MCU instruction count per update |
| Programmable frame frequency | Software-selectable 60–300 Hz range ensures optimal flicker suppression across varied panel types |
| Backplane swapping (BPS) | Reconfigures BP/segment pin assignments to reduce layer count and trace congestion on 2-layer PCBs |
| Line/frame inversion selection | INV bit selects DC-compensation method - frame inversion lowers power; line inversion avoids flicker |
| Separate VLCD and VDD supplies | Enables independent optimization of LCD contrast (via VLCD) and logic robustness (via VDD) |
Applications
| Climate Control Display | Car Radio Front Panel |
|---|---|
Use Scenario: HVAC interface with temperature, fan speed, and mode indicators on a 4-backplane segmented LCD. IC Role / Device Role / Timing Role: PCA8546BTT/AJ acts as dedicated segment driver, receiving SPI commands from MCU and generating time-multiplexed backplane/segment waveforms. Use Value: Reduces MCU firmware load by handling display timing and RAM management; supports 1/3 bias for high-contrast automotive panels. |
Use Scenario: Audio system status display showing station, volume, source, and equalizer settings using alphanumeric 14-segment characters. IC Role / Device Role / Timing Role: PCA8546BTT/AJ serves as SPI-connected display peripheral, driving up to 11 × 14-segment characters with frame-synchronized updates. Use Value: Enables crisp, low-flicker rendering at 120 Hz frame rate; leverages on-chip RAM to avoid continuous MCU polling during audio playback. |
| Instrument Cluster Sub-Display | Driver Information Center |
Use Scenario: Secondary gauge display showing fuel level, oil pressure, and warning icons in compact dashboard space. IC Role / Device Role / Timing Role: PCA8546BTT/AJ provides independent LCD drive capability, isolating display timing from main cluster MCU real-time constraints. Use Value: Supports 176-element graphics rendering (e.g., bar graphs, custom icons); operates reliably at 95 °C ambient per AEC-Q100 Grade 3. |
Use Scenario: Centralized driver info panel integrating trip computer, service reminders, and connectivity status on a multiplexed LCD. IC Role / Device Role / Timing Role: PCA8546BTT/AJ functions as SPI slave device, updating dynamic content via burst writes to display RAM without CPU intervention. Use Value: Low-power frame inversion mode extends battery life in key-off scenarios; separate VLCD allows contrast tuning across lighting conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA8546BTT/AY | Identical functionality and pinout; dry-pack packaging replaces non-dry-pack of PCA8546BTT/AJ per PCN202102010F01 | No change in electrical behavior or thermal performance; only packaging moisture sensitivity differs | Select PCA8546BTT/AY for humidity-sensitive assembly environments requiring MSL1 handling |
| PCF8576DT | 4-backplane, 144-segment SPI LCD driver; lacks frame frequency programming and backplane swapping | Supports smaller displays (≤144 segments); no factory-calibrated frame rate adjustment or BPS pin remapping | Choose PCF8576DT only when display size ≤144 segments and fixed 120 Hz frame rate suffices |
Compared with PCA8546BTT/AY, PCA8546BTT/AJ requires non-dry-pack handling but offers identical drive capability; versus PCF8576DT, PCA8546BTT/AJ adds programmable frame frequency, backplane swapping, and 32 extra segments - critical for scalable automotive UIs.
Availability
PCA8546BTT/AJ is available at Aetrix Electronics and suitable for climate control systems, car radio front panels, and instrument cluster sub-displays requiring stable component supply across automotive production lifecycles.
Supply support for PCA8546BTT/AJ 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 PCA8546 product line delivers integrated LCD drivers optimized for AEC-Q100-compliant automotive human-machine interfaces, emphasizing low-power operation, wide supply flexibility, and robust multiplexed display control.
FAQ
What interface protocol does the PCA8546BTT/AJ use?
The PCA8546BTT/AJ uses a 3-wire unidirectional SPI interface with CE (chip enable), SCL (serial clock), and SDI (serial data input). It does not support I2C - that variant is the PCA8546ATT/AJ. The SPI interface operates up to 5 MHz and requires no bidirectional data lines, simplifying MCU GPIO usage.
Does the PCA8546BTT/AJ support programmable frame frequency?
Yes, the PCA8546BTT/AJ supports software-programmable frame frequency from 60 Hz to 300 Hz in approximately 10 Hz increments. This is achieved via the frame-frequency command (FD[4:0]) and relies on factory calibration of the internal oscillator. The setting directly controls LCD flicker and contrast stability.
What is the purpose of the BPS bit in the PCA8546BTT/AJ?
The BPS (backplane swap) bit reassigns the physical pin locations of BP0–BP3 and associated segment outputs (e.g., S32–S43) between two mirrored configurations. This aids PCB layout by allowing routing optimization on 2-layer boards without redesigning the display interconnect - a feature unique to the PCA8546 family.
How does the PCA8546BTT/AJ handle power-down mode?
In power-down mode (enabled via PD bit), the PCA8546BTT/AJ disables all backplane and segment outputs (driving them to VSS) and shuts off the internal oscillator. The display must be disabled first (E = 0) to prevent artifacts. RAM contents are retained, enabling fast resume after wake-up.
Is the PCA8546BTT/AJ qualified for automotive use?
Yes, the PCA8546BTT/AJ is AEC-Q100 Grade 3 qualified, certified for operation from −40 °C to +95 °C ambient temperature. It is designed specifically for automotive interior applications including dashboard displays, climate control, and infotainment panels where reliability under thermal stress is mandatory.
PCA8546BTT/AJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 56-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Display Type:
- LCD
- Configuration:
- 176 Segment
- Interface:
- SPI
- Digits or Characters:
- -
- Current - Supply:
- 30 µA
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 95°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TSSOP
PCA8546BTT/AJ FAQ
1.How can I place an order for PCA8546BTT/AJ through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA8546BTT/AJ 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 PCA8546BTT/AJ reliable?
The price and inventory of PCA8546BTT/AJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA8546BTT/AJ is usually 5 days.
3.What payment methods are accepted for PCA8546BTT/AJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA8546BTT/AJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA8546BTT/AJ?
PCA8546BTT/AJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA8546BTT/AJ 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 PCA8546BTT/AJ?
For technical support, including PCA8546BTT/AJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA8546BTT/AJ requirements.
6.How does Aetrix verify that PCA8546BTT/AJ is sourced from the original manufacturer or authorized distributors?
All PCA8546BTT/AJ 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 PCA8546BTT/AJ meets industry standards.
7.What is the process for return or replacement of PCA8546BTT/AJ?
All PCA8546BTT/AJ units undergo pre-shipment inspection (PSI). If there is an issue with PCA8546BTT/AJ, 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 PCA8546BTT/AJ part is unused and in its original packaging.
Return procedure for PCA8546BTT/AJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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