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NXP Semiconductors PCF8576DU/2DA/2,02
- Part No.:
- PCF8576DU/2DA/2,02
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- Die
- Datasheet:
-
PCF8576DU/2DA/2,02.pdf
- Description:
- IC DRVR 7 SEGMENT DIE
- Quantity:
- Payment:
- Shipping:
Inventory:5,760
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Product details
Overview
PCF8576DU/2DA/2 from NXP Semiconductors is a bare-die 40 × 4 universal LCD driver IC supporting static and 2–4 backplane multiplexing, with 40 segment outputs (S0–S39), 4 backplane outputs (BP0–BP3), 40 × 4-bit display RAM, and I²C-bus interface up to 400 kHz - designed for embedded instrumentation and industrial panel displays requiring low-power, high-integration LCD control.
For engineers reviewing the PCF8576DU/2DA/2 datasheet, PCF8576DU/2DA/2 pinout, PCF8576DU/2DA/2 application, or PCF8576DU/2DA/2 equivalent, this page delivers verified technical context, exact die-level pin mapping (59 bumps), drive-mode-specific biasing behavior (1/2 or 1/3), cascade synchronization capability via SYNC, and validated alternatives for legacy design continuity.
Technical Context
The PCF8576DU/2DA/2 implements a fully integrated LCD controller/driver architecture with internal voltage-follower-based LCD bias generation, selectable static or 1:2/1:3/1:4 multiplex drive modes, and auto-incremented RAM addressing synchronized to I²C subaddress boundaries. Its display RAM organization maps directly to backplane/segment topology: 4 rows (BP0–BP3) × 40 columns (S0–S39).
It supports cascading via dedicated SYNC and CLK pins, enabling expansion to up to 2,560 segments. The die uses silicon gate CMOS process, operates from 1.8 V to 5.5 V logic supply, and accepts VLCD from 2.5 V to 6.5 V - allowing direct compatibility with low-threshold and high-threshold twisted nematic LCDs without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Display Capacity | Up to 160 LCD elements (4 backplanes × 40 segments); supports 20×7-seg or 10×14-seg alphanumeric displays. |
| I²C Interface Speed | 400 kHz maximum - enables fast display updates with minimal MCU overhead in resource-constrained systems. |
| Drive Modes | Static, 1:2, 1:3, or 1:4 multiplex - selected via command register; determines RAM row usage and bias configuration. |
| LCD Bias Config | Selectable 1/2 or 1/3 bias - sets RMS on/off voltages (e.g., 1:4 mode + 1/3 bias yields Von(RMS) = 0.577×VLCD). |
| Supply Ranges | VDD: 1.8 V–5.5 V; VLCD: 2.5 V–6.5 V - permits independent optimization of logic and display power domains. |
| Memory | 40 × 4-bit static display RAM with auto-increment addressing - stores full frame data with no external memory required. |
| Package Type | Bare die (59-bump flip-chip) - intended for chip-on-glass (COG) or chip-on-board (COB) integration with custom thermal/mechanical mounting. |
Pinout & Package
PCF8576DU/2DA/2 is supplied as a bare die in 59-bump flip-chip configuration (no leadframe or encapsulation), optimized for COG/COB assembly. Mechanical alignment is defined by C1/C2 marks; substrate (rear side) must be electrically isolated and connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 58, 59 | SDA | I²C serial data bidirectional line - requires external pull-up; supports multi-master arbitration and auto-incremented RAM writes. |
| 2, 3 | SCL | I²C clock input - synchronizes all I²C transfers; frequency up to 400 kHz defines maximum display update rate. |
| 4 | SYNC | Cascade synchronization I/O - coordinates frame timing across multiple PCF8576D devices in daisy-chain configurations. |
| 5 | CLK | External clock input/output - used for system-wide timing sync when internal oscillator is disabled (OSC = VDD). |
| 6 | VDD | Logic supply input - powers internal registers, I²C interface, and control logic; range 1.8 V–5.5 V. |
| 7 | OSC | Oscillator enable - tie to VSS to activate internal RC oscillator; tie to VDD to use external clock on CLK pin. |
| 8–10 | A0–A2 | Hardware subaddress inputs - define device address offset within I²C bus; enable RAM auto-wrap across cascaded dies. |
| 11 | SA0 | I²C address bit 0 - combines with A0–A2 to form full 7-bit slave address (default 0x70 or 0x71 depending on SA0). |
| 12 | VSS | Ground reference - substrate connection point; must be electrically isolated from PCB ground plane per datasheet. |
| 13 | VLCD | LCD supply input - powers internal bias generator; adjustable from 2.5 V to 6.5 V to match LCD threshold requirements. |
| 14–17 | BP0–BP3 | Backplane outputs - generate time-multiplexed waveforms; BP0–BP3 active in 1:4 mode; unused outputs may be left open. |
| 18–57 | S0–S39 | Segment outputs - drive individual LCD electrodes; each corresponds to one column in 40×4 RAM bitmap. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LCD bias generator | Eliminates external resistors or charge pumps - generates precise 1/2 or 1/3 bias voltages internally from VLCD. |
| Auto-incremented RAM addressing | Reduces I²C transaction count - consecutive bytes load into sequential RAM locations without repeated address commands. |
| Display memory bank switching | Enables flicker-free static/duplex mode transitions - allows dual-frame buffering without visible display artifacts. |
| Versatile blinking control | Configurable blink rate and duty cycle per segment group - implemented in hardware, freeing MCU resources. |
| Cascade-ready SYNC/CLK architecture | Ensures frame-aligned operation across multiple dies - critical for large-panel applications like multi-digit meters or HMI displays. |
Applications
| Industrial Panel Meters | Medical Device Displays |
|---|---|
|
Use Scenario: 4-digit LCD readout in DIN-rail mounted energy meters with temperature-compensated contrast. IC Role / Device Role / Timing Role: Primary LCD controller/driver handling 1:4 multiplexing, bias generation, and I²C command parsing. Use Value: Enables single-die integration of display control and high-voltage LCD drive (VLCD up to 6.5 V), reducing BOM count and layout complexity. |
Use Scenario: Low-power patient monitor with segmented alphanumeric display showing vital signs and status icons. IC Role / Device Role / Timing Role: Standalone display driver managing static and 1:2 multiplexed segments under strict EMC and reliability constraints. Use Value: AEC-Q100-qualified variant availability (PCF8576DT/S400/2) confirms robustness for medical-grade designs requiring long-term stability. |
| Automotive Instrument Clusters | Smart Home Thermostats |
|
Use Scenario: Analog-style gauge overlays and digital trip odometer in entry-level vehicle dashboards. IC Role / Device Role / Timing Role: Secondary display driver cascaded with main controller to extend segment count beyond 40. Use Value: SYNC pin coordination ensures zero-frame-skew across multi-die displays - essential for safety-critical visual feedback timing. |
Use Scenario: Compact wall-mounted HVAC controller with 14-segment alphanumeric display and icon indicators. IC Role / Device Role / Timing Role: Dedicated LCD driver offloading display management from main MCU to reduce firmware latency. Use Value: 1.8 V minimum VDD allows direct connection to 2.0 V LDO rails - improving battery life in coin-cell-powered thermostats. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF85176T/1 | Successor IC with enhanced ESD rating (±8 kV HBM), extended -40 °C to +105 °C temp range, and updated I²C timing. | Targeted at new industrial designs requiring longer product lifecycle and higher ambient operating temperature. | Recommended for new designs where PCF8576DU/2DA/2 is obsolete; requires minor firmware adaptation due to register map changes. |
| PCA85176T/Q900/1 | Automotive-qualified (AEC-Q100 Grade 2), includes built-in diagnostics, watchdog, and fail-safe segment disable. | Required for automotive instrument clusters needing ISO 26262 ASIL-B support and functional safety compliance. | Only suitable where AEC-Q100 qualification is mandatory; not drop-in compatible due to added safety registers and fault reporting logic. |
Compared with PCF8576DU/2DA/2, PCF85176T/1 offers broader temperature tolerance and improved robustness for next-gen industrial equipment, while PCA85176T/Q900/1 adds automotive-grade safety features at the cost of increased software complexity - neither is pin-compatible with the bare-die PCF8576DU/2DA/2.
Availability
PCF8576DU/2DA/2 is available at Aetrix Electronics and suitable for industrial panel meters, medical device displays, automotive instrument clusters, and smart home thermostats requiring stable component supply and long-term manufacturing continuity.
Supply support for PCF8576DU/2DA/2 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, with deep expertise in mixed-signal and display interface technologies.
The PCF8576D family was engineered to simplify LCD integration in cost-sensitive, space-constrained embedded systems - delivering single-chip control, drive, and bias generation for static and low-multiplex-rate displays.
FAQ
What is the package type and mounting method for PCF8576DU/2DA/2?
PCF8576DU/2DA/2 is supplied as a bare die with 59 bumps in flip-chip configuration, intended exclusively for chip-on-glass (COG) or chip-on-board (COB) assembly. It requires conductive adhesive bonding and precise alignment using C1/C2 marks. The substrate must be electrically isolated and connected to VSS per datasheet Section 5.2 footnote [1]. No leadframe, molding compound, or standard SMT footprint is provided.
Does PCF8576DU/2DA/2 support cascading with other LCD drivers?
Yes, PCF8576DU/2DA/2 supports daisy-chain cascading via dedicated SYNC and CLK pins. When multiple PCF8576D devices are connected, the SYNC signal ensures frame-aligned operation across all units, while CLK distributes timing - enabling expansion to up to 2,560 total segments. Subaddressing (A0–A2, SA0) allows seamless RAM auto-wrap across die boundaries during I²C writes.
What LCD bias configurations does PCF8576DU/2DA/2 support?
PCF8576DU/2DA/2 supports static, 1:2, 1:3, and 1:4 multiplex drive modes with corresponding 1/2 or 1/3 bias selection. For example, in 1:4 mode it uses 1/3 bias yielding Von(RMS) = 0.577×VLCD and Voff(RMS) = 0.333×VLCD (discrimination ratio 1.732). Bias is generated internally - no external resistor network is needed - and VLCD can be set from 2.5 V to 6.5 V to match LCD module thresholds.
Is PCF8576DU/2DA/2 still recommended for new designs?
No - PCF8576DU/2DA/2 is a legacy bare-die variant not recommended for new designs. NXP explicitly states replacement paths: PCF85176T/1 for industrial applications and PCA85176T/Q900/1 for automotive. While PCF8576DU/2DA/2 remains available for existing production continuity, new projects should evaluate these successors for improved temperature range, ESD robustness, and long-term supply assurance.
How is display data organized in the 40 × 4-bit RAM of PCF8576DU/2DA/2?
The display RAM maps directly to physical outputs: 4 rows correspond to BP0–BP3, and 40 columns correspond to S0–S39. In 1:4 mode, each RAM byte occupies one column across all four rows (e.g., bits [0:3] of column 0 drive S0 on BP0–BP3). Data loading uses auto-increment addressing - pointer advances by 2 per byte in 1:4 mode, 3 in 1:3, 4 in 1:2, and 8 in static mode - as defined in Section 6.10.1 of the datasheet.
PCF8576DU/2DA/2,02 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Tray
- 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:
- 8 µA
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
PCF8576DU/2DA/2,02 FAQ
1.How can I place an order for PCF8576DU/2DA/2,02 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCF8576DU/2DA/2,02 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 PCF8576DU/2DA/2,02 reliable?
The price and inventory of PCF8576DU/2DA/2,02 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCF8576DU/2DA/2,02 is usually 5 days.
3.What payment methods are accepted for PCF8576DU/2DA/2,02?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCF8576DU/2DA/2,02 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCF8576DU/2DA/2,02?
PCF8576DU/2DA/2,02 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCF8576DU/2DA/2,02 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 PCF8576DU/2DA/2,02?
For technical support, including PCF8576DU/2DA/2,02 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCF8576DU/2DA/2,02 requirements.
6.How does Aetrix verify that PCF8576DU/2DA/2,02 is sourced from the original manufacturer or authorized distributors?
All PCF8576DU/2DA/2,02 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 PCF8576DU/2DA/2,02 meets industry standards.
7.What is the process for return or replacement of PCF8576DU/2DA/2,02?
All PCF8576DU/2DA/2,02 units undergo pre-shipment inspection (PSI). If there is an issue with PCF8576DU/2DA/2,02, 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 PCF8576DU/2DA/2,02 part is unused and in its original packaging.
Return procedure for PCF8576DU/2DA/2,02:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCF8576DU/2DA/2,02 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
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