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NXP Semiconductors PCF8576CT/1,118
- Part No.:
- PCF8576CT/1,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 56-BSOP (0.435", 11.05mm Width)
- Datasheet:
-
PCF8576CT/1,118.pdf
- Description:
- IC DRVR 7 SEGMENT 56VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,668
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Product details
Overview
PCF8576CT/1,118 from NXP Semiconductors is a universal LCD controller and driver IC designed for low-multiplex-rate segment LCDs. It supports up to 4 backplanes and 40 segments, delivers internal bias generation, operates from 2 V to 6 V logic/LCD supply, and communicates via I²C-bus - enabling direct interface with microcontrollers in battery-powered instrumentation displays.
For engineers reviewing the PCF8576CT/1,118 datasheet, PCF8576CT/1,118 pinout, PCF8576CT/1,118 application, or PCF8576CT/1,118 equivalent, key selection criteria include static/1:2/1:3/1:4 multiplex drive mode support, 40 × 4-bit display RAM, VSO56 package compatibility, and cascading capability for larger LCDs.
Technical Context
The PCF8576CT/1,118 integrates an I²C-bus controller, display RAM, LCD bias generator, and segment/backplane drivers in a single chip. Its timing engine derives LCD frame frequency (65 Hz in power-saving mode, 69 Hz normal) from either internal oscillator (enabled via OSC–VSS) or external clock applied to CLK pin.
It implements auto-incremented RAM addressing with subaddressing (A0–A2), supports bank switching in static/duplex modes, and provides hardware-controlled blinking. Display data loading across cascaded devices occurs without software intervention due to SYNC signal synchronization and boundary-aware auto-increment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Display Drive Capability | Up to 4 backplanes and 40 segments - supports static, 1:2, 1:3, or 1:4 multiplex configurations. |
| Display RAM | 40 × 4-bit static RAM - stores full segment state; one-to-one mapping between RAM bits and LCD elements. |
| I²C Interface | Standard-mode (100 kHz max) - bidirectional SDA/SCL with hardware subaddressing (A0–A2) and auto-incremented addressing. |
| LCD Bias Generation | Internal resistor-divider network - selectable 1/2 or 1/3 bias for multiplex modes; static bias also supported. |
| Supply Voltage Range | VDD = 2 V to 6 V - enables direct interface with low-threshold (2 V) or high-threshold (6 V) twisted nematic LCDs. |
| Power-Saving Mode | Reduces frame rate and clock dependency - cuts power consumption significantly for battery-operated applications like telephones and portable meters. |
| Cascading Support | Synchronous multi-device operation via SYNC pin - allows expansion to up to 2560 display elements using multiple PCF8576C units. |
Pinout & Package
PCF8576CT/1,118 is housed in a plastic very small outline package (VSO56) with 56 leads, body dimensions 12.8 mm × 7.5 mm × 2.35 mm (SOT190-1), optimized for plane wiring in single- and multi-device LCD systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDA (Pin 1) | I²C serial data line | Bidirectional open-drain interface; requires external pull-up; handles command/data transfer and ACK/NACK. |
| SCL (Pin 2) | I²C serial clock input | Master-generated clock; synchronizes all I²C transactions including display RAM writes and mode configuration. |
| SYNC (Pin 3) | Cascade synchronization I/O | Outputs synchronized frame timing when master; inputs timing when slave - ensures phase alignment across daisy-chained devices. |
| CLK (Pin 4) | External clock input/output | Functions as output when internal oscillator enabled (OSC = VSS); becomes input when external clock used (OSC = VDD). |
| VDD (Pin 5) | Logic supply voltage | Powers internal logic, I²C interface, and RAM; range 2 V–6 V; substrate tied to this pin per datasheet. |
| OSC (Pin 6) | Oscillator enable control | Connect to VSS to enable internal oscillator; connect to VDD to disable and use external clock on CLK pin. |
| A0–A2 (Pins 7–9) | Hardware subaddress inputs | Select device subaddress (0–7) for I²C write targeting; enables efficient multi-device RAM loading without address overhead. |
| SA0 (Pin 10) | I²C bus address bit 0 | Configures LSB of 7-bit I²C slave address (default 0x70–0x77 depending on SA0 and A0–A2). |
| VSS (Pin 11) | Ground reference | Common return for logic, bias, and LCD drive circuits; must be low-impedance connection. |
| VLCD (Pin 12) | LCD supply voltage | Sets LCD operating voltage (VDD − VLCD); adjustable for temperature compensation and contrast optimization. |
| BP0–BP3 (Pins 13–16) | LCD backplane outputs | Drive backplane electrodes; configured per multiplex mode - e.g., all active in 1:4; BP0/BP2 and BP1/BP3 paired in 1:2. |
| S0–S39 (Pins 17–56) | LCD segment outputs | Direct drive to segment electrodes; each corresponds to one RAM bit column; unused pins left open-circuit. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LCD bias generator | Eliminates need for external resistive divider or charge pump - reduces BOM count and layout complexity in space-constrained designs. |
| Auto-incremented RAM addressing | Enables sequential display data writes without repeated address commands - cuts I²C transaction overhead by >40% in typical update cycles. |
| Selectable multiplex drive modes | Runtime-configurable static / 1:2 / 1:3 / 1:4 operation - allows single firmware to support multiple LCD panel variants across product families. |
| Power-saving mode | Reduces frame rate and internal clock dependency - extends battery life in portable devices such as gas meters and handheld test equipment. |
| Cascadable architecture | SYNC pin enables deterministic timing across up to 64 devices - supports large custom LCDs (e.g., 320-segment industrial HMI) without FPGA glue logic. |
Applications
| Gas Meter Display | Industrial Panel Meter |
|---|---|
Use Scenario: Battery-powered residential gas meter with 4-digit numeric LCD and status icons. IC Role / Device Role / Timing Role: Primary LCD driver managing 16 segments + 4 backplanes in 1:4 multiplex mode; receives updates via I²C from MCU every 10 seconds. Use Value: Internal bias generation and power-saving mode extend 10-year battery life; VSO56 footprint minimizes PCB area in sealed meter housing. | Use Scenario: DIN-rail mounted panel meter displaying voltage, current, and energy parameters on a 2-line alphanumeric LCD. IC Role / Device Role / Timing Role: Dedicated segment driver handling 40 segments across two 20-character lines; configured in 1:2 multiplex mode for optimal contrast at 5 V VLCD. Use Value: Hardware subaddressing (A0–A2) allows shared I²C bus with other peripherals; 40 × 4-bit RAM stores full display state without MCU intervention. |
| Telephone Keypad Display | Medical Infusion Pump UI |
Use Scenario: Cordless telephone base station with 14-segment alphanumeric display showing caller ID and menu options. IC Role / Device Role / Timing Role: LCD controller driving ten 14-segment characters (140 elements) using cascaded PCF8576CT/1,118 units in 1:4 mode. Use Value: Cascading via SYNC eliminates timing skew; power-saving mode reduces standby current to <1 µA - critical for always-on base stations. | Use Scenario: Portable infusion pump with segmented LCD showing flow rate, volume delivered, and alarm indicators. IC Role / Device Role / Timing Role: Safety-critical display driver operating in static mode for high-reliability 7-segment digits; powered from isolated 3.3 V rail. Use Value: No external components required - simplifies safety certification; POR defaults ensure known display state after power cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF8576CHL/1,118 | LQFP64 package (10 mm × 10 mm); higher pin count includes additional NC pins and different thermal pad layout. | Suitable for larger PCBs with routing flexibility; not drop-in compatible due to footprint and pitch mismatch. | Select when board space permits larger package and thermal performance is prioritized over size. |
| PCF8576CU/2/F2,026 | Bare die (3.2 mm × 2.92 mm); requires custom COB or flip-chip assembly; no leadframe or molding compound. | Targeted for ultra-compact modules (e.g., wearable displays); demands specialized packaging and test infrastructure. | Choose only for high-volume, space-constrained applications where die-level integration justifies NRE and process risk. |
Compared with PCF8576CHL/1,118 and PCF8576CU/2/F2,026, the PCF8576CT/1,118 offers the optimal balance of compact VSO56 footprint, standard surface-mount assembly, and full feature parity - making it the preferred choice for mid-volume industrial and consumer LCD modules.
Availability
PCF8576CT/1,118 is available at Aetrix Electronics and suitable for gas metering, industrial panel meters, telephone UIs, and medical infusion pump displays requiring stable component supply and long-term lifecycle support.
Supply support for PCF8576CT/1,118 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 company specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The PCF8576C family was designed specifically for cost-sensitive, low-power segment LCD interfaces in utility meters, home appliances, and portable instrumentation - emphasizing integration, supply flexibility, and cascading scalability.
FAQ
What LCD configurations does the PCF8576CT/1,118 support?
The PCF8576CT/1,118 supports static drive (1 backplane), 1:2, 1:3, and 1:4 multiplex modes with up to 40 segments. It can drive twenty 7-segment characters, ten 14-segment characters, or any 160-element graphics layout. Configuration is set via mode-set commands and backplane output routing - all verified in the official NXP datasheet Rev. 13.
Does the PCF8576CT/1,118 require external components for LCD biasing?
No, the PCF8576CT/1,118 includes an internal LCD bias generator with selectable 1/2 or 1/3 bias configurations. External resistors or charge pumps are unnecessary - confirmed in Section 7.2 and Table 6 of the PCF8576CT/1,118 datasheet. Only VDD, VSS, and VLCD supplies and LCD connections are required.
How does cascading work with multiple PCF8576CT/1,118 devices?
Cascading uses the SYNC pin to align frame timing across devices and the subaddress inputs (A0–A2) to route I²C data to specific units. When display RAM fills, auto-increment wraps to the next device's address space - enabling seamless expansion to 2560 elements. This behavior is documented in Sections 7.6 and 7.13 of the PCF8576CT/1,118 datasheet.
What is the power consumption profile of the PCF8576CT/1,118 in power-saving mode?
In power-saving mode, the PCF8576CT/1,118 reduces frame frequency to 65 Hz and lowers internal clock dependency, achieving extremely low quiescent current - critical for battery life in telephones and utility meters. Exact current values depend on VLCD, VDD, and display content but are characterized in Section 10 of the PCF8576CT/1,118 datasheet.
Can the PCF8576CT/1,118 drive high-threshold twisted nematic (TN) LCDs?
Yes, the PCF8576CT/1,118 supports VLCD up to 6 V, making it compatible with high-threshold TN LCDs requiring higher operating voltages. The wide 2 V–6 V logic/LCD supply range is explicitly specified in Section 2 and Table 7 of the PCF8576CT/1,118 datasheet for direct interfacing with such panels.
PCF8576CT/1,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 56-BSOP (0.435", 11.05mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Display Type:
- LCD
- Configuration:
- 7 Segment + DP, 14 Segment + DP + AP, Dot Matrix
- Interface:
- I2C
- Digits or Characters:
- 10 Characters, 20 Characters, 160 Elements
- Current - Supply:
- 120 µA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-VSO
PCF8576CT/1,118 FAQ
1.How can I place an order for PCF8576CT/1,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCF8576CT/1,118 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 PCF8576CT/1,118 reliable?
The price and inventory of PCF8576CT/1,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCF8576CT/1,118 is usually 5 days.
3.What payment methods are accepted for PCF8576CT/1,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCF8576CT/1,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCF8576CT/1,118?
PCF8576CT/1,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCF8576CT/1,118 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 PCF8576CT/1,118?
For technical support, including PCF8576CT/1,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCF8576CT/1,118 requirements.
6.How does Aetrix verify that PCF8576CT/1,118 is sourced from the original manufacturer or authorized distributors?
All PCF8576CT/1,118 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 PCF8576CT/1,118 meets industry standards.
7.What is the process for return or replacement of PCF8576CT/1,118?
All PCF8576CT/1,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCF8576CT/1,118, 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 PCF8576CT/1,118 part is unused and in its original packaging.
Return procedure for PCF8576CT/1,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCF8576CT/1,118 Tags
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PCA8561AHN/AY
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