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NXP Semiconductors PCA8561BHN/AY
- Part No.:
- PCA8561BHN/AY
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
PCA8561BHN/AY.pdf
- Description:
- IC DRVR 7 SEGMENT 32HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:17,230
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Product details
Overview
PCA8561BHN/AY from NXP Semiconductors is an AEC-Q100 Grade 2 automotive LCD segment driver with 4 backplane and 18 segment outputs, SPI-bus interface (5 MHz), internal LCD bias generation, and support for static to 1:4 multiplex drive modes. It operates from 1.8 V to 5.5 V on both VDD and VLCD supplies and targets instrument cluster and control knob displays.
For engineers reviewing the PCA8561BHN/AY datasheet, PCA8561BHN/AY pinout, PCA8561BHN/AY application, or PCA8561BHN/AY equivalent, this page delivers verified technical context, validated pin functions, confirmed SPI timing and bias configuration capabilities, and real-world automotive display integration guidance - all specific to the PCA8561BHN/AY variant.
Technical Context
The PCA8561BHN/AY implements a dedicated SPI-bus controller (CE, SCL, SDIO) instead of I²C, enabling deterministic 5 MHz serial communication with auto-incrementing display RAM access. Its internal oscillator supports frame frequencies from 32 Hz to 256 Hz, configurable via Device_ctrl register (01h), and drives LCD waveforms with selectable 1/2 or 1/3 bias and multiplex ratios (1:1 to 1:4).
It integrates a fractional LCD bias generator with buffered VLCD-derived voltage taps (VSS–VLCD divider), independent VLCD/VDD supplies, and hardware reset (RST, active LOW) plus Power-On Reset enable (PORE). Blink control (0.5/1/2 Hz) and frame vs. line inversion are programmable via Display_ctrl_2 (03h).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Interface | SPI-bus (CE, SCL, SDIO); 5 MHz max clock rate - enables high-speed display updates without I²C arbitration delays. |
| Backplane/Segment Count | 4 COM outputs (COM0–COM3), 18 SEG outputs (SEG0–SEG17) - supports up to 72-segment graphics or 9×7-segment digits. |
| Supply Range | VDD and VLCD: 1.8 V to 5.5 V - allows direct connection to common microcontroller rails and flexible LCD panel biasing. |
| Multiplex & Bias Modes | Configurable 1:1 (static), 1:2, 1:3, or 1:4 multiplex; 1/2 or 1/3 bias - matches diverse LCD module requirements without external components. |
| Frame Frequency | 32 Hz to 256 Hz (7 selectable steps) - ensures flicker-free operation across temperature and display size variations. |
| AEC-Q100 Grade | Grade 2 (−40 °C to +105 °C) - qualified for under-hood and instrument cluster environments with full thermal reliability. |
| Package | HVQFN32, 5 mm × 5 mm × 0.85 mm - thermally enhanced, space-efficient footprint compatible with automated SMT assembly. |
Pinout & Package
HVQFN32 package (SOT617-3), 5 mm × 5 mm body, 0.85 mm height, exposed thermal pad connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 30–32 | COM3, COM0–COM2 | Active LCD backplane outputs; driven in sequence per selected multiplex mode (1:4 uses all four). |
| 2 | VLCD | Dedicated LCD supply input; powers internal bias generator and segment/backplane drivers independently of VDD. |
| 3 | VDD | Digital core supply (1.8–5.5 V); powers logic, SPI interface, and register block - isolated from VLCD path. |
| 4 | VSS | Ground reference for digital and analog sections; die paddle is internally tied to VSS for thermal conduction. |
| 5 | RST | Hardware reset input (active LOW, ≥10 µs pulse); forces known state including cleared address pointer and disabled display. |
| 6 | SDIO | Bi-directional SPI data line (MOSI/MISO); supports full-duplex read/write to display registers and command registers. |
| 7 | CLK | Internal oscillator output / external clock input; configured as output when OSC=0, input when OSC=1 (per Device_ctrl). |
| 8 | SCL | SPI clock input; synchronizes SDIO transfers at up to 5 MHz - not I²C SCL despite shared pin name. |
| 9 | CE | Chip enable (active LOW); enables SPI transaction decoding and prevents spurious writes during bus contention. |
| 10 | PORE | Power-On Reset enable; connect to VDD to activate internal POR, or to VSS to disable and require external RST assertion. |
| 11 | n.c. | No-connect terminal; must be left unconnected - no internal circuitry or function assigned. |
| 12–29 | SEG0–SEG17 | 18 independent LCD segment drivers; each sinks current to illuminate corresponding segment when paired with active COM. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 2 (−40 °C to +105 °C) - certified for safety-critical instrument clusters and control knobs without derating. |
| Independent VLCD/VDD supplies | Enables optimal LCD contrast tuning (via VLCD) while maintaining stable MCU interface logic (VDD) - eliminates cross-supply noise coupling. |
| Programmable blink control | Three fixed blink frequencies (0.5/1/2 Hz) with frame-synchronized blanking - provides user-alert indication without software timer overhead. |
| Auto-incrementing display RAM | Sequential write to addresses 04h–0Fh fills COM0–COM3 rows automatically - reduces host CPU cycles needed for full-screen refresh. |
| Enhanced power drive (BOOST) | Increases segment drive strength for high-capacitance LCDs (e.g., large-area or stacked-glass modules) - maintains waveform fidelity at extended trace lengths. |
| Internal bias generation | On-chip 3-tap resistor divider + buffers deliver precise 1/2 or 1/3 VLCD bias voltages - removes need for external resistors or op-amps. |
Applications
| Instrument Cluster Display | Rotary Control Knob UI |
|---|---|
|
Use Scenario: Driving segmented LCD in automotive digital speedometer/tachometer with warning icons and gear indicators. IC Role / Device Role / Timing Role: Primary LCD segment driver; receives display data via SPI from MCU, generates multiplexed COM/SEG waveforms with 1:4 drive and 1/3 bias. Use Value: Enables compact, low-power, AEC-Q100-compliant display subsystem with no external bias components and deterministic 5 MHz update rate. |
Use Scenario: Small-format alphanumeric display on HVAC or infotainment rotary encoder with status feedback and mode labels. IC Role / Device Role / Timing Role: Dedicated SPI-connected LCD controller/driver; manages blinking indicators and partial-screen updates using auto-increment RAM addressing. Use Value: Reduces MCU GPIO count and firmware complexity while supporting 14-segment characters and dynamic icon rendering in tight board space. |
| Battery-Powered Dashboard Module | Medical Device Status Panel |
|
Use Scenario: Low-power instrument overlay in EV range estimator or battery health monitor with intermittent display wake-up. IC Role / Device Role / Timing Role: Ultra-low-power LCD driver; enters power-down mode (DE=0) between updates, retaining register state and requiring only SPI wake command. Use Value: Achieves sub-1 µA standby current (excluding VLCD leakage), extending coin-cell or Li-ion runtime in always-on dashboard accessories. |
Use Scenario: Patient parameter display (e.g., SpO₂, pulse rate) on portable diagnostic tool requiring high readability and regulatory compliance. IC Role / Device Role / Timing Role: AEC-Q100-qualified LCD driver used in medical-grade design; leverages frame inversion (INV=1) to minimize DC stress on liquid crystal. Use Value: Supports long-term display reliability and meets IEC 60601-1 EMI/ESD robustness expectations via hardened SPI interface and internal bias stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD segment driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA8561AHN/AY | I²C interface (400 kHz), A0/A1 address pins, no CE or SDIO; identical pinout and bias/mux functionality. | Preferred where system already uses I²C bus and requires multi-drop capability (up to 4 devices via A0/A1). | Select PCA8561AHN/AY only if I²C infrastructure exists and SPI is unavailable; same PCB layout but different firmware interface. |
| PCF8576CT/1/AY | 24-segment × 4-backplane, I²C-only, wider VLCD range (2.5–6.5 V), no BOOST mode, non-automotive grade. | Suitable for industrial HMI or consumer electronics where AEC-Q100 is not required and higher segment count is needed. | Choose PCF8576CT/1/AY only for non-automotive designs needing >18 segments; lacks Grade 2 qualification and SPI option. |
Compared with PCA8561AHN/AY, the PCA8561BHN/AY trades I²C multi-drop flexibility for deterministic 5 MHz SPI throughput and simplified chip-select control; versus PCF8576CT/1/AY, it offers automotive qualification and enhanced drive strength at the cost of segment count and VLCD headroom.
Availability
PCA8561BHN/AY is available at Aetrix Electronics and suitable for automotive instrument clusters, rotary control interfaces, and battery-powered medical status panels requiring stable component supply, AEC-Q100 compliance, and SPI-based display integration.
Supply support for PCA8561BHN/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 ICs.
The PCA8561 series was designed specifically for automotive-grade segmented LCD driving in space-constrained, low-power, high-reliability environments - emphasizing AEC-Q100 qualification, dual-supply flexibility, and integrated bias generation.
FAQ
What interface protocol does the PCA8561BHN/AY support?
The PCA8561BHN/AY supports only the SPI-bus interface - with CE (chip enable), SCL (serial clock), and SDIO (bidirectional data) pins - operating up to 5 MHz. It does not support I²C; that functionality is exclusive to the PCA8561AHN/AY variant. The SPI implementation includes auto-incrementing address pointers for efficient display RAM writes.
Does the PCA8561BHN/AY include an internal oscillator?
Yes, the PCA8561BHN/AY includes a fully integrated oscillator whose frequency is programmable from 32 Hz to 256 Hz in seven discrete steps via the Device_ctrl register (01h). The oscillator output appears on the CLK pin when COE=1, or CLK becomes an external clock input when OSC=1 - enabling synchronization to system timing sources.
How does the PCA8561BHN/AY handle LCD bias generation?
The PCA8561BHN/AY generates LCD bias voltages internally using a precision resistor divider between VLCD and VSS, with buffered outputs for 1/2 or 1/3 bias configurations. This eliminates external resistors or op-amps. The bias mode is selected via the B bit in Display_ctrl_1 (02h), and the resulting waveforms meet electro-optical requirements for contrast and longevity across temperature.
What is the purpose of the PORE pin on the PCA8561BHN/AY?
The PORE (Power-On Reset Enable) pin on the PCA8561BHN/AY controls activation of the internal POR circuit. When tied to VDD, it enables automatic reset at power-up; when tied to VSS (or left open), POR is disabled and a hardware reset via the RST pin (≥10 µs LOW pulse) is required. This provides design flexibility for systems with external power sequencing.
Can the PCA8561BHN/AY drive static LCDs?
Yes, the PCA8561BHN/AY supports static (1:1) drive mode via MUX[1:0]=11 in Display_ctrl_1 (02h), activating only COM0 while routing all 18 segments to that single backplane. In this mode, 1/2 bias is selected (B=1), and the device drives up to 18 individual segments - ideal for simple bar graphs or custom static symbols without multiplexing artifacts.
PCA8561BHN/AY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Display Type:
- LCD
- Configuration:
- 7 Segment + DP, 14 Segment + DP + AP, Dot Matrix
- Interface:
- I2C, SPI
- Digits or Characters:
- 4 Characters, 9 Characters, 72 Elements
- Current - Supply:
- 1.8 µA
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-HVQFN (5x5)
PCA8561BHN/AY FAQ
1.How can I place an order for PCA8561BHN/AY through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA8561BHN/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 PCA8561BHN/AY reliable?
The price and inventory of PCA8561BHN/AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA8561BHN/AY is usually 5 days.
3.What payment methods are accepted for PCA8561BHN/AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA8561BHN/AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA8561BHN/AY?
PCA8561BHN/AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA8561BHN/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 PCA8561BHN/AY?
For technical support, including PCA8561BHN/AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA8561BHN/AY requirements.
6.How does Aetrix verify that PCA8561BHN/AY is sourced from the original manufacturer or authorized distributors?
All PCA8561BHN/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 PCA8561BHN/AY meets industry standards.
7.What is the process for return or replacement of PCA8561BHN/AY?
All PCA8561BHN/AY units undergo pre-shipment inspection (PSI). If there is an issue with PCA8561BHN/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 PCA8561BHN/AY part is unused and in its original packaging.
Return procedure for PCA8561BHN/AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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