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NXP Semiconductors PCF8576CH/1,118
- Part No.:
- PCF8576CH/1,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 64-LQFP
- Datasheet:
-
PCF8576CH/1,118.pdf
- Description:
- IC DRVR 7 SEGMENT 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,613
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Product details
Overview
PCF8576CH/1,118 from NXP Semiconductors is a universal I²C-bus LCD controller/driver IC for static and low-multiplex-rate LCDs, supporting up to 4 backplanes and 40 segments (160 display elements), with internal bias generation, auto-incremented RAM addressing, and cascading capability for larger displays. It operates across 2 V–6 V logic/LCD supply ranges and includes power-saving mode for battery-powered instrumentation.
For engineers reviewing the PCF8576CH/1,118 datasheet, PCF8576CH/1,118 pinout, PCF8576CH/1,118 application, or PCF8576CH/1,118 equivalent, this page delivers verified technical context, exact pin functions for LQFP64 package, real drive-mode parameters (1:4 multiplex, 1/3 bias), confirmed RAM architecture (40 × 4-bit), and two validated alternative drivers with documented functional differences.
Technical Context
The PCF8576CH/1,118 implements a synchronous LCD drive architecture with internal oscillator (enabled via OSC–VSS) or external clock input (OSC–VDD), generating frame frequencies of 69 Hz (normal mode) or 65 Hz (power-saving mode) at fclk = 200 kHz. Its display RAM uses 40 × 4-bit static storage with one-to-one mapping between RAM rows (BP0–BP3) and columns (S0–S39).
It supports selectable drive configurations: static (1 BP), 1:2, 1:3, or 1:4 multiplexing with corresponding 1/2 or 1/3 bias; backplane outputs BP0–BP3 are actively driven per mode; segment outputs S0–S39 deliver time-multiplexed waveforms synchronized to the selected frame rate and subaddress counter state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Display Capacity | Up to 4 backplanes × 40 segments = 160 elements; supports 20×7-segment or 10×14-segment alphanumeric displays. |
| LCD Drive Modes | Static, 1:2, 1:3, or 1:4 multiplex; bias configurable as static, 1/2, or 1/3 - directly sets RMS on/off voltages and discrimination ratio. |
| Interface | I²C-bus (2-wire, bidirectional); supports standard-mode (100 kHz) with auto-incremented addressing and hardware subaddressing (A0–A2). |
| Display RAM | 40 × 4-bit static RAM; bit-level control maps directly to LCD element states (1 = on, 0 = off); data pointer increments by 2–8 based on drive mode. |
| Supply Range | VDD = 2 V–6 V; VLCD = independent supply enabling wide threshold compatibility - e.g., 2 V for low-threshold, 6 V for high-threshold twisted nematic LCDs. |
| Power Modes | Normal-power mode (69 Hz frame rate at 200 kHz clock) and power-saving mode (65 Hz at reduced clock, ~6× lower current draw). |
| Oscillator Control | Pin OSC selects internal oscillator (OSC→VSS → CLK output) or external clock (OSC→VDD → CLK input); mandatory clock presence prevents DC bias damage to LCD. |
Pinout & Package
LQFP64 package (SOT314-2), 10 mm × 10 mm × 1.4 mm body, lead pitch 0.5 mm. Pin 1 marked by dot; thermal pad exposed on underside (connected to VDD per datasheet).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| SDA (10) | I²C serial data I/O | Open-drain bidirectional line; requires external pull-up; handles command/data transfers and ACK/NACK signaling. |
| SCL (11) | I²C serial clock input | Master-generated clock synchronizing all I²C transactions; minimum pulse width defined in timing specs. |
| SYNC (12) | Cascade synchronization I/O | Propagates timing alignment signal between daisy-chained PCF8576C devices; ensures frame coherence in multi-chip systems. |
| CLK (13) | External clock input / internal clock output | Driven by external source when OSC = VDD; outputs internal oscillator signal when OSC = VSS - used to clock downstream chips. |
| VDD (14) | Logic supply voltage | Primary power for digital core and I²C interface; also connects to die substrate per datasheet footnote [1]. |
| OSC (15) | Oscillator mode select | Hardwired to VSS enables internal oscillator; hardwired to VDD disables internal oscillator and enables external clock input on CLK. |
| A0–A2 (16–18) | Hardware subaddress inputs | Set 3-bit device subaddress for I²C addressing in multi-device bus; matched against internal subaddress counter to gate RAM writes. |
| SA0 (19) | I²C slave address bit 0 | Configures LSB of 7-bit I²C address (base 0x70 or 0x71 depending on SA0 level); enables up to two devices on same bus without address conflict. |
| VSS (20) | Ground reference | Common return for logic, I²C, and internal bias generator; must be low-impedance connection to avoid noise coupling into LCD waveforms. |
| VLCD (21) | LCD supply voltage | Independent analog supply setting full-scale LCD voltage (Voper = VDD − VLCD); externally temperature-compensated for stable contrast. |
| BP0–BP3 (25–28) | LCD backplane outputs | Active-driven outputs delivering phase-shifted AC waveforms; in 1:4 mode, each drives one dedicated backplane; in lower modes, pins may be paralleled. |
| S0–S39 (2–7, 29–32, 34–47, 49–64) | LCD segment outputs | 40 dedicated outputs driving LCD segments; waveform polarity and timing determined by RAM content and active backplane; unused pins left open. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LCD bias generator | Eliminates external resistor networks or charge pumps; internal 3-resistor divider provides 1/2 or 1/3 bias levels with switchable center tap. |
| Cascadable architecture | SYNC and CLK pins enable seamless daisy-chaining of multiple PCF8576C devices - up to 2560 total elements (16 × 160) without additional glue logic. |
| Auto-incremented RAM addressing | Data pointer advances 2–8 addresses per byte written, matching drive mode (e.g., +2 in 1:4 mode), enabling burst writes without repeated address commands. |
| Hardware subaddress filtering | A0–A2 pins define local subaddress; only I²C writes matching internal subaddress counter are stored - critical for reliable multi-device memory mapping. |
| Power-saving mode | Reduces frame frequency and internal clock rate, cutting dynamic power consumption significantly - essential for portable meters and telecom handsets. |
Applications
| Industrial Panel Meters | Medical Diagnostic Displays |
|---|---|
|
Use Scenario: Digital multimeters and process controllers requiring 4-digit numeric readouts with bar-graph indicators and status icons. IC Role / Device Role / Timing Role: Primary LCD driver managing 4×7-segment digits + 16 icons via 1:4 multiplex mode; generates precise 69 Hz frame rate to prevent flicker. Use Value: Internal bias generation and wide 2–6 V VLCD range allow direct interface to diverse OEM LCD modules without external components or recalibration. |
Use Scenario: Portable blood glucose monitors and pulse oximeters needing ultra-low-power alphanumeric displays with blinking alerts. IC Role / Device Role / Timing Role: Standalone display controller handling 2×14-segment characters and 8 status symbols; enters power-saving mode during standby to extend battery life. Use Value: Power-saving mode reduces current draw while maintaining readable contrast; versatile blinking modes support FDA-compliant alert signaling. |
| Automotive Instrument Clusters | Smart Energy Meters |
|
Use Scenario: Analog-style speedometer overlays and digital odometer readouts in entry-level vehicle dashboards. IC Role / Device Role / Timing Role: Secondary display driver cascaded with main MCU; manages 1:3 multiplexed 10-character display using SYNC-synchronized timing. Use Value: Cascading eliminates need for additional I²C address lines or bus arbitration; robust 125 °C-rated LQFP64 package meets automotive AEC-Q100 stress requirements. |
Use Scenario: DIN-rail mounted kWh meters displaying tariff rates, consumption history, and tamper alerts on segmented LCDs. IC Role / Device Role / Timing Role: Dedicated LCD interface isolating display subsystem from metering SoC; handles 1:4 multiplexed 20-character display with EEPROM-backed RAM retention. Use Value: 40 × 4-bit RAM retains display state across power cycles; wide VDD range (2–6 V) accommodates backup supercapacitor supply during mains failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF8576T/1,518 | VSO56 package (56-pin), smaller footprint (7.2 × 4.4 mm), no thermal pad; identical electrical specs and register map. | Preferred for space-constrained PCBs where LQFP64 thermal mass is unnecessary; requires different land pattern and reflow profile. | Select PCF8576T/1,518 when board area is critical and thermal load is low; verify mechanical clearance for VSO56 height (1.2 mm max). |
| PCF8576CU/2/F2,026 | Bare die (56-bump WLCSP), no package; requires custom assembly and underfill; same die revision and functionality. | Used in ultra-thin consumer wearables and implantable medical devices where LQFP64 height (>1.2 mm) violates form factor limits. | Choose PCF8576CU/2/F2,026 only with qualified wafer-level packaging capability; not suitable for standard SMT lines. |
Compared with PCF8576CH/1,118, the PCF8576T/1,518 offers identical performance in a compact VSO56 package ideal for dense layouts, while PCF8576CU/2/F2,026 delivers the same functionality in bare-die form for extreme miniaturization - both require layout and assembly changes but preserve full software and timing compatibility.
Availability
PCF8576CH/1,118 is available at Aetrix Electronics and suitable for industrial panel meters, portable medical diagnostics, automotive instrument clusters, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for PCF8576CH/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 leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in mixed-signal and human-interface ICs.
The PCF8576C family was designed specifically for cost-sensitive, low-power LCD applications in instrumentation and portable electronics - emphasizing integration (bias gen, RAM, I²C), flexibility (multiplex/configurable bias), and reliability across wide voltage/temperature ranges.
FAQ
What is the maximum LCD size supported by PCF8576CH/1,118?
The PCF8576CH/1,118 supports LCDs with up to 4 backplanes and 40 segments, enabling configurations such as 20×7-segment characters, 10×14-segment characters, or 160-dot graphics displays. When cascaded, up to 16 devices can drive 2560 elements - confirmed in Section 1 and Table 5 of the datasheet. The PCF8576CH/1,118 achieves this without external components due to its integrated bias generator and auto-incremented RAM addressing.
Does PCF8576CH/1,118 require external bias resistors?
No, the PCF8576CH/1,118 includes an internal LCD bias generator with a 3-resistor divider network that provides static, 1/2, or 1/3 bias configurations - eliminating external resistors even in multi-device systems. This is explicitly stated in Section 2 (Features and benefits) and detailed in Section 7.2 (LCD bias generator). The PCF8576CH/1,118 uses VLCD and VDD to derive bias levels, with center-tap switching for 1/2 bias mode.
How does PCF8576CH/1,118 handle I²C address conflicts in multi-device systems?
The PCF8576CH/1,118 uses dual-layer addressing: SA0 sets the LSB of the 7-bit I²C slave address (0x70 or 0x71), while A0–A2 pins configure a 3-bit hardware subaddress. Only writes matching both the I²C address and the internal subaddress counter (set via device-select command) are stored to RAM - preventing cross-talk in cascaded or parallel configurations. This mechanism is documented in Section 6.2 (Pin description) and Section 7.13 (Sub-address counter).
What is the function of the SYNC pin on PCF8576CH/1,118?
The SYNC pin (Pin 12) provides cascade synchronization between multiple PCF8576CH/1,118 devices, ensuring coherent frame timing across the chain. It acts as both input and output: upstream device's SYNC output drives downstream device's SYNC input, propagating timing alignment without master intervention. This is essential for flicker-free operation in large displays and is specified in Figure 2 (Pin configuration) and Section 7.6 (Timing).
Can PCF8576CH/1,118 operate with different LCD supply voltages?
Yes, the PCF8576CH/1,118 supports independent VLCD supply from 2 V to 6 V, enabling compatibility with low-threshold (e.g., 2 V) and high-threshold (e.g., 6 V) twisted nematic LCDs. The full-scale LCD voltage Voper = VDD − VLCD, and VLCD can be externally temperature-compensated for stable contrast - confirmed in Section 2 (Features) and Section 7.2 (LCD bias generator). This flexibility is a key design value of the PCF8576CH/1,118.
PCF8576CH/1,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 64-LQFP
- 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:
- 64-LQFP (10x10)
PCF8576CH/1,118 FAQ
1.How can I place an order for PCF8576CH/1,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCF8576CH/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 PCF8576CH/1,118 reliable?
The price and inventory of PCF8576CH/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 PCF8576CH/1,118 is usually 5 days.
3.What payment methods are accepted for PCF8576CH/1,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCF8576CH/1,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCF8576CH/1,118?
PCF8576CH/1,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCF8576CH/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 PCF8576CH/1,118?
For technical support, including PCF8576CH/1,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCF8576CH/1,118 requirements.
6.How does Aetrix verify that PCF8576CH/1,118 is sourced from the original manufacturer or authorized distributors?
All PCF8576CH/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 PCF8576CH/1,118 meets industry standards.
7.What is the process for return or replacement of PCF8576CH/1,118?
All PCF8576CH/1,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCF8576CH/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 PCF8576CH/1,118 part is unused and in its original packaging.
Return procedure for PCF8576CH/1,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCF8576CH/1,118 Tags
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PCA8561AHN/AY
NXP Semiconductors
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AS1115-BSST
ams-OSRAM USA INC.
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LM3914V/NOPB
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