My Inquiry
My Account
NXP Semiconductors PCF8576CT/1,112
- Part No.:
- PCF8576CT/1,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 56-BSOP (0.435", 11.05mm Width)
- Datasheet:
-
PCF8576CT/1,112.pdf
- Description:
- IC DRVR 7 SEGMENT 56VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,107
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PCF8576CT/1,112 from NXP Semiconductors is a universal LCD controller and driver IC designed for low-multiplex-rate segment displays. It supports up to 4 backplanes and 40 segments, delivers internal LCD bias generation with selectable 1/2 or 1/3 bias, operates from 2 V to 6 V logic/LCD supply, and communicates via I²C-bus at up to 100 kHz - enabling compact, low-power alphanumeric displays in portable instrumentation.
For engineers reviewing the PCF8576CT/1,112 datasheet, PCF8576CT/1,112 pinout, PCF8576CT/1,112 application, or PCF8576CT/1,112 equivalent, key selection criteria include static/1:2/1:3/1:4 multiplex drive mode support, 40 × 4-bit display RAM with auto-incremented addressing, cascading capability via SYNC/CLK pins, and VSO56 package compatibility with space-constrained PCB layouts.
Technical Context
The PCF8576CT/1,112 integrates an I²C interface controller, 40-segment output driver, four backplane drivers (BP0–BP3), and an internal LCD bias generator with selectable 1/2 or 1/3 bias configuration. Its display RAM is organized as 40 columns × 4 rows, directly mapped to S0–S39 and BP0–BP3 outputs.
Frame frequency is derived from clock input (internal oscillator or external source) with integer division: ffr = fclk/2880 in normal-power mode or fclk/480 in power-saving mode. Power-saving mode reduces clock dependency by factor of six, enabling ultra-low quiescent current in battery-powered applications.
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 modes |
| Display RAM | 40 × 4-bit static RAM; one-to-one mapping to segment/backplane outputs for deterministic pixel control |
| I²C Interface | Standard-mode (100 kHz max); auto-incremented addressing and hardware subaddressing minimize bus overhead |
| LCD Bias Generation | Internal voltage divider; selectable 1/2 or 1/3 bias; no external components required |
| Supply Voltage Range | VDD: 2 V to 6 V; VLCD independently configurable for low- or high-threshold LCDs |
| Power-Saving Mode | Reduces effective clock divisor by 6×, enabling lower fclk and significantly reduced current draw |
| Operating Temperature | −40 °C to +85 °C; qualified for industrial-grade embedded display systems |
Pinout & Package
PCF8576CT/1,112 is housed in a plastic very small outline package (VSO56) with 56 leads, body size 11.0 × 5.4 × 1.6 mm (SOT190-1), optimized for plane wiring in single or cascaded configurations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDA (Pin 1) | I²C serial data I/O | Bidirectional open-drain interface; requires external pull-up for communication |
| SCL (Pin 2) | I²C serial clock input | Master-generated clock; synchronizes all I²C transfers including RAM writes |
| SYNC (Pin 3) | Cascade synchronization I/O | Propagates timing between multiple PCF8576C devices; enables seamless expansion beyond 40 segments |
| CLK (Pin 4) | External clock input / internal clock output | Configurable via OSC pin; drives frame timing and internal logic when external clock used |
| VDD (Pin 5) | Logic supply | Powers digital core and I²C interface; range 2 V–6 V supports wide LCD threshold compatibility |
| OSC (Pin 6) | Oscillator enable | Connect to VSS to enable internal oscillator; connect to VDD to use external clock on CLK pin |
| A0–A2 (Pins 7–9) | Hardware subaddress inputs | Enable up to 8 independent device addresses on same I²C bus for multi-driver systems |
| SA0 (Pin 10) | I²C address bit 0 | Extends device addressing; combined with A0–A2 allows full 7-bit I²C slave address definition |
| VSS (Pin 11) | Ground reference | Common return for logic and analog sections; must be low-impedance for stable bias generation |
| VLCD (Pin 12) | LCD supply voltage | Set independently from VDD; determines full-scale LCD drive voltage (Voper = VDD − VLCD) |
| BP0–BP3 (Pins 13–16) | LCD backplane outputs | Driven per selected multiplex mode; unused outputs may be left open-circuit |
| S0–S39 (Pins 17–56) | LCD segment outputs | Direct connection to LCD electrodes; unused segments must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Single-chip LCD controller + driver | Eliminates need for separate timing, bias, and segment drivers - reduces BOM count and layout complexity |
| 40 × 4-bit display RAM with auto-increment | Enables burst writes of display data without repeated address commands; improves I²C efficiency in dynamic updates |
| Selectable multiplex drive modes | Supports static, 1:2, 1:3, and 1:4 configurations - matches diverse LCD panel architectures without redesign |
| Internal LCD bias generation | Removes external resistor networks and op-amps; ensures stable bias ratios across temperature and supply variation |
| Cascadable architecture with SYNC/CLK | Allows up to 2560 total display elements (64 × PCF8576C) using daisy-chained timing - scales display size linearly |
| Wide supply range (2 V–6 V) | Permits direct operation from single Li-ion, 3.3 V, or 5 V rails; accommodates both low-threshold and twisted-nematic LCDs |
Applications
| Portable Medical Instrumentation | Industrial Control Panel Displays |
|---|---|
Use Scenario: Battery-powered blood glucose meters and handheld diagnostic tools requiring legible, low-power alphanumeric readouts. IC Role / Device Role / Timing Role: PCF8576CT/1,112 acts as the sole LCD interface, generating multiplexed waveforms and bias voltages while receiving display data over I²C from an MCU. Use Value: Power-saving mode and 2 V minimum VDD enable >1-year battery life; 40-segment capacity supports multi-parameter numeric + status icon display. | Use Scenario: Front-panel LCDs on PLCs, HMIs, and programmable relays where reliability and long-term component availability are critical. IC Role / Device Role / Timing Role: PCF8576CT/1,112 serves as the dedicated segment driver, isolating MCU GPIO resources and offloading display timing and bias management. Use Value: −40 °C to +85 °C rating ensures operation in harsh enclosures; cascading support allows scalable display upgrades without firmware changes. |
| Consumer Appliance Keypads | Telecom Terminal Displays |
Use Scenario: Microwave ovens, washing machines, and HVAC controllers with segmented LCDs showing time, temperature, and cycle status. IC Role / Device Role / Timing Role: PCF8576CT/1,112 drives static or 1:2 multiplexed displays using internal oscillator, eliminating external timing components. Use Value: No external bias components reduce bill-of-materials cost; VSO56 package fits narrow bezel designs; blinking modes support visual alerts without MCU intervention. | Use Scenario: Cordless phone handsets and VoIP desk phones needing compact, readable LCDs with low standby current. IC Role / Device Role / Timing Role: PCF8576CT/1,112 operates in power-saving mode during idle periods, maintaining display content while drawing minimal current from backup battery. Use Value: Ultra-low quiescent current extends talk/standby time; I²C interface simplifies integration with telephony SoCs; 1:4 multiplex support enables higher-resolution character displays. |
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 × 10 mm); identical electrical specs and register map | Requires larger PCB footprint; better thermal dissipation and reworkability than VSO56 | Select when board space permits and manual assembly or thermal performance is prioritized |
| PCF8576CU/2/F2,026 | Bare die (56-bump, 3.2 × 2.92 mm); same functionality, no package parasitics | Intended for COB or chip-on-flex integration; requires custom substrate and wire bonding | Select only for high-volume, space-constrained modules where packaging cost and size are critical |
Compared with PCF8576CHL/1,118 and PCF8576CU/2/F2,026, the PCF8576CT/1,112 offers optimal balance of compactness (VSO56), manufacturability (standard SMT), and thermal performance for mid-volume consumer and industrial displays.
Availability
PCF8576CT/1,112 is available at Aetrix Electronics and suitable for portable medical instrumentation, industrial control panels, and consumer appliance displays requiring stable component supply, long lifecycle support, and consistent parametric performance across production batches.
Supply support for PCF8576CT/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 focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in mixed-signal and interface ICs.
The PCF8576C product line was designed specifically for cost-sensitive, low-power segment LCD applications in battery-operated and space-constrained embedded systems - emphasizing integration, flexibility, and long-term supply stability.
FAQ
What is the maximum number of LCD segments the PCF8576CT/1,112 can drive?
The PCF8576CT/1,112 drives up to 40 segments and up to 4 backplanes, supporting display configurations from static (1 BP) up to 1:4 multiplex (4 BP). In 1:4 mode, it controls 160 distinct LCD elements (4 × 40). Cascading multiple PCF8576CT/1,112 devices expands total element count - up to 2560 elements with 64 units.
Does the PCF8576CT/1,112 require external components for LCD bias generation?
No. The PCF8576CT/1,112 includes an internal LCD bias generator with selectable 1/2 or 1/3 bias configuration, implemented via on-chip resistor dividers. No external resistors, capacitors, or op-amps are needed - even in cascaded configurations - simplifying design and reducing BOM cost.
How does the PCF8576CT/1,112 handle I²C communication in cascaded systems?
The PCF8576CT/1,112 uses hardware subaddressing (A0–A2 pins) and the SYNC signal to coordinate cascaded operation. Display data automatically wraps to the next device when the subaddress counter matches the hardware address, enabling seamless expansion without additional MCU overhead or address translation logic.
What is the role of the OSC pin on the PCF8576CT/1,112?
The OSC pin configures the clock source: tied to VSS enables the internal oscillator; tied to VDD selects external clock input on the CLK pin. This dual-clock flexibility allows optimization for accuracy (external crystal) or simplicity (internal RC), while ensuring continuous timing - removing the clock freezes the LCD in an unsafe DC state.
Can unused segment or backplane outputs on the PCF8576CT/1,112 be left floating?
Yes. Unused segment outputs (S0–S39) and backplane outputs (BP0–BP3) may be left open-circuit. The datasheet explicitly states this is acceptable - no pull-up/down or termination is required. However, unused pins must not be connected to other signals or used as feed-throughs.
PCF8576CT/1,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 56-BSOP (0.435", 11.05mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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/1,112 FAQ
1.How can I place an order for PCF8576CT/1,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCF8576CT/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 PCF8576CT/1,112 reliable?
The price and inventory of PCF8576CT/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 PCF8576CT/1,112 is usually 5 days.
3.What payment methods are accepted for PCF8576CT/1,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCF8576CT/1,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCF8576CT/1,112?
PCF8576CT/1,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCF8576CT/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 PCF8576CT/1,112?
For technical support, including PCF8576CT/1,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCF8576CT/1,112 requirements.
6.How does Aetrix verify that PCF8576CT/1,112 is sourced from the original manufacturer or authorized distributors?
All PCF8576CT/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 PCF8576CT/1,112 meets industry standards.
7.What is the process for return or replacement of PCF8576CT/1,112?
All PCF8576CT/1,112 units undergo pre-shipment inspection (PSI). If there is an issue with PCF8576CT/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 PCF8576CT/1,112 part is unused and in its original packaging.
Return procedure for PCF8576CT/1,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCF8576CT/1,112 Tags
-
PCA8561AHN/AY
NXP Semiconductors
-
SN74LS47N
Texas Instruments
-
PCF85176T/1Y
NXP Semiconductors
-
PCF85176H/1,518
NXP Semiconductors
-
BU9796AMUV-E2
Rohm Semiconductor
-
PCA85176H/Q900/1,5
NXP Semiconductors
-
PCF8537AH/1,518
NXP Semiconductors
-
LM3914VX/NOPB
Texas Instruments
-
PCF85134HL/1,118
NXP Semiconductors
-
AS1115-BSST
ams-OSRAM USA INC.
-
PCA8534AH/Q900/1,5
NXP Semiconductors
-
LM3914V/NOPB
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
