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NXP Semiconductors PCF8566T/1,112
- Part No.:
- PCF8566T/1,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 40-BSOP (0.295", 7.50mm Width)
- Datasheet:
-
PCF8566T/1,112.pdf
- Description:
- IC DRVR 7 SEGMNT 12 DIGIT 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,957
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Product details
Overview
PCF8566T/1,112 from NXP Semiconductors is a single-chip I²C-compatible LCD controller/driver for static or low-multiplex-rate LCDs with up to 4 backplanes and 24 segments. It integrates internal LCD bias generation, 24 × 4-bit display RAM, auto-incremented addressing, and power-saving mode. It drives numeric (12×7-seg), alphanumeric (6×14-seg), or graphic (96-element) displays in battery-powered telephony and portable instrumentation.
For engineers reviewing the PCF8566T/1,112 datasheet, PCF8566T/1,112 pinout, PCF8566T/1,112 application, or PCF8566T/1,112 equivalent, key selection criteria include its 40-pin VSO40 package, selectable 1:1–1:4 multiplex drive modes, 2.5 V to 6 V supply range, I²C-bus subaddressing support, and cascading capability with PCF8576C for extended segment count.
Technical Context
The PCF8566T/1,112 implements a synchronous LCD drive architecture with an internal oscillator (enabled via OSC–VSS) or external clock input (OSC–VDD), generating frame frequencies of 69 Hz (normal) or 65 Hz (power-saving). Its timing engine coordinates segment/backplane waveform sequencing, bank-selectable RAM access, and hardware subaddress filtering across cascaded devices.
It features dual independent bank selectors-input and output-that enable simultaneous preparation and switching of display data in static and duplex modes. The integrated voltage-follower LCD bias generator supports static, 1/2, or 1/3 bias configurations without external components, directly setting VLCD relative to VDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Display Capacity | Up to 96 LCD elements (e.g., 12×7-seg digits or 6×14-seg chars) using 4 backplanes + 24 segments |
| Supply Voltage | 2.5 V to 6 V logic/LCD supply range; enables direct operation from single-cell Li-ion or 3×AA batteries |
| I²C Interface | Standard-mode (100 kHz) compatible; supports hardware subaddressing (A0–A2) and slave address bit SA0 |
| Drive Modes | Selectable static, 1:2, 1:3, or 1:4 multiplex; bias configurable as static, 1/2, or 1/3 via command set |
| Memory | 24 × 4-bit static display RAM with auto-incremented addressing and bank-switching capability |
| Power Modes | Normal mode (69 Hz frame rate); power-saving mode reduces clock dependency by 6× for ultra-low quiescent current |
| Package | VSO40 (SOT158-1): 40-lead plastic very small outline package, 10.0 mm × 5.4 mm × 1.6 mm body |
Pinout & Package
PCF8566T/1,112 is housed in a space-saving 40-lead plastic very small outline package (VSO40, SOT158-1), optimized for plane wiring in multi-device LCD systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDA (1) | I²C-bus data line | Bidirectional open-drain interface; requires external pull-up; handles command/data transfer and ACK/NACK |
| SCL (2) | I²C-bus clock line | Input/output synchronized with host MCU; defines timing for all I²C transactions |
| SYNC (3) | Cascade synchronization | Drives next device's SYNC input in daisy-chain; ensures frame-aligned timing across multiple PCF8566s |
| CLK (4) | External clock I/O or internal clock output | Output when OSC = VSS (internal osc); input when OSC = VDD; feeds timing to downstream devices |
| VDD (5) | Positive supply | Primary logic and bias generator supply; substrate tied internally but not electrically connected |
| OSC (6) | Oscillator select control | Configures clock source: grounded → internal oscillator; VDD → external clock input on CLK pin |
| A0–A2 (7–9) | Hardware subaddress inputs | Enable selective write access in cascaded systems; match subaddress counter to route data to correct device |
| SA0 (10) | Slave address bit 0 | Extends I²C slave address from 7-bit base (0x70–0x77) to support up to 8 devices on same bus |
| VSS (11) | Logic ground reference | Common return for digital circuitry; separate from LCD ground path to minimize noise coupling |
| VLCD (12) | LCD supply voltage input | Set externally to define full-scale LCD drive voltage (VDD − VLCD); enables temperature compensation |
| BP0–BP3 (13–16) | LCD backplane outputs | Driven in phase or complementary patterns per selected multiplex mode; BP1/BP3 and BP0/BP2 can be paralleled for higher current |
| S0–S23 (17–40) | LCD segment outputs | 24 dedicated CMOS drivers; unused pins left open-circuit; each maps to one RAM bit per backplane row |
Key Features
| Feature | Design Value |
|---|---|
| No external bias components | Integrated voltage-follower LCD bias generator eliminates need for resistive dividers or op-amps |
| Cascadable architecture | SYNC pin and subaddressing enable seamless expansion to 1536 segments using multiple PCF8566T/1,112 or PCF8576C |
| Flexible memory banking | Independent input/output bank selectors allow double-buffered display updates in static and 1:2 modes without flicker |
| Versatile blinking control | Full-display blink at 0.5–2 Hz or arbitrary segment blink via RAM bank swapping-no host CPU intervention required |
| Low-power optimization | Power-saving mode cuts effective clock rate by 6×, reducing dynamic power while maintaining display retention |
Applications
| Portable Telephony | Industrial Panel Meters |
|---|---|
Use Scenario: Battery-powered cordless phone or VoIP handset with 4-digit LCD display showing caller ID, signal strength, and battery level. IC Role / Device Role / Timing Role: Primary LCD driver managing 4-backplane, 24-segment display; generates precise AC waveforms via internal bias and multiplex timing. Use Value: Enables >1-year battery life via power-saving mode and eliminates external bias circuitry, reducing BOM cost and PCB area. | Use Scenario: DIN-rail mounted energy meter with 6-character alphanumeric LCD showing kWh, voltage, current, and tariff status. IC Role / Device Role / Timing Role: Standalone display controller interfacing to 8-bit microcontroller over I²C; handles 14-segment character mapping and blink indication. Use Value: Simplifies firmware by offloading RAM management, auto-incremented writes, and bank-switched updates-reducing host CPU load by ~30%. |
| Medical Diagnostic Devices | Home Appliance Control Panels |
Use Scenario: Portable blood glucose monitor with segmented LCD showing test result, date/time, and error codes. IC Role / Device Role / Timing Role: Low-voltage LCD driver operating from 3 V coin cell; manages static or 1:2 multiplex drive with 1/2 bias for optimal contrast at low VLCD. Use Value: Guarantees legible display down to 2.5 V supply while meeting IEC 60601 leakage and ESD immunity requirements via robust CMOS design. | Use Scenario: Microwave oven or washing machine control panel with 12-digit numeric display and status icons. IC Role / Device Role / Timing Role: Cascaded LCD driver (2× PCF8566T/1,112) driving 48 segments; uses SYNC pin for synchronized frame updates across both chips. Use Value: Eliminates timing skew between display sections, preventing visual artifacts during rapid parameter changes like cooking time entry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD controller/driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF8576C | 40-segment driver; supports up to 160 segments in cascade; no static drive mode; requires external bias resistor network | Targeted at larger alphanumeric/graphic displays (e.g., 16×2 character modules); lacks power-saving mode and RAM banking | Choose PCF8576C only when >24 segments per chip are needed and static drive is unnecessary |
| HD44102 | 4-bit parallel interface; no I²C; 32-segment capacity; requires external oscillator and bias circuitry | Legacy industrial designs with parallel MCU buses; higher pin count and layout complexity than PCF8566T/1,112 | Prefer PCF8566T/1,112 for new designs requiring I²C simplicity, lower power, and integrated bias |
Compared with PCF8576C and HD44102, PCF8566T/1,112 delivers superior integration (on-chip bias, RAM, I²C), lower system-level BOM count, and flexible low-power operation-making it optimal for compact, battery-sensitive, and rapidly developed LCD interfaces.
Availability
PCF8566T/1,112 is available at Aetrix Electronics and suitable for portable telephony, industrial panel meters, medical diagnostic devices, and home appliance control panels requiring stable component supply and long-term lifecycle support.
Supply support for PCF8566T/1,112 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The PCF8566T/1,112 belongs to NXP's legacy LCD peripheral product line, designed specifically for cost-sensitive, low-power, microcontroller-based display interfaces in consumer and industrial equipment.
FAQ
What is the maximum LCD segment count supported by PCF8566T/1,112 in a single-device configuration?
The PCF8566T/1,112 supports up to 96 LCD elements in a single-device configuration-for example, 12 seven-segment digits, 6 fourteen-segment alphanumeric characters, or arbitrary graphics layouts-using its 24 segment outputs and up to 4 backplanes in 1:4 multiplex mode. This is achieved through time-multiplexed RAM addressing where each RAM word row corresponds to one backplane.
Does PCF8566T/1,112 require external components for LCD bias generation?
No, PCF8566T/1,112 does not require external components for LCD bias generation. It integrates an internal voltage-follower LCD bias generator with a three-resistor divider between VDD and VLCD, supporting static, 1/2, and 1/3 bias configurations. Only the VLCD supply voltage must be provided externally to set the full-scale LCD drive voltage (VDD − VLCD).
How does the PCF8566T/1,112 handle cascading with multiple devices on the same I²C bus?
The PCF8566T/1,112 supports cascading via its SYNC pin and hardware subaddressing (A0–A2, SA0). In a daisy chain, the SYNC output of one device drives the SYNC input of the next, ensuring frame-aligned timing. Subaddress matching filters I²C writes to specific devices, enabling automatic wrap-around to the next PCF8566T/1,112 when display RAM boundaries are exceeded.
What are the valid supply voltage ranges for VDD and VLCD on PCF8566T/1,112?
PCF8566T/1,112 operates with VDD from 2.5 V to 6 V. VLCD must be supplied externally within the same range but is typically set lower than VDD to establish the required LCD full-scale voltage (VDD − VLCD). For example, with VDD = 5 V and 1/3 bias in 1:4 mode, VLCD ≈ 3.3 V yields optimal discrimination ratio (1.732) and contrast.
Can PCF8566T/1,112 drive both static and multiplexed LCDs, and how is the mode selected?
Yes, PCF8566T/1,112 supports static, 1:2, 1:3, and 1:4 multiplexed LCDs. Mode selection is performed via I²C command sequences (mode-set commands), which configure the number of active backplane outputs (BP0–BP3), bias level (static, 1/2, or 1/3), and RAM addressing behavior. Power-on reset defaults to 1:4 multiplex with 1/3 bias.
PCF8566T/1,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 40-BSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Display Type:
- LCD
- Configuration:
- 7 Segment + DP, 14 Segment (24 Segment)
- Interface:
- I2C
- Digits or Characters:
- 6 Characters, 12 Digits, 96 Elements
- Current - Supply:
- 30 µA
- Voltage - Supply:
- 2.5V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VSO
PCF8566T/1,112 FAQ
1.How can I place an order for PCF8566T/1,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCF8566T/1,112 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 PCF8566T/1,112 reliable?
The price and inventory of PCF8566T/1,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCF8566T/1,112 is usually 5 days.
3.What payment methods are accepted for PCF8566T/1,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCF8566T/1,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCF8566T/1,112?
PCF8566T/1,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCF8566T/1,112 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 PCF8566T/1,112?
For technical support, including PCF8566T/1,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCF8566T/1,112 requirements.
6.How does Aetrix verify that PCF8566T/1,112 is sourced from the original manufacturer or authorized distributors?
All PCF8566T/1,112 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 PCF8566T/1,112 meets industry standards.
7.What is the process for return or replacement of PCF8566T/1,112?
All PCF8566T/1,112 units undergo pre-shipment inspection (PSI). If there is an issue with PCF8566T/1,112, 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 PCF8566T/1,112 part is unused and in its original packaging.
Return procedure for PCF8566T/1,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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