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NXP Semiconductors PCA8576CH/Q900,157
- Part No.:
- PCA8576CH/Q900,157
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 64-LQFP
- Datasheet:
-
PCA8576CH/Q900,157.pdf
- Description:
- IC DRVR 7 SEGMENT 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,050
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Product details
Overview
PCA8576CH/Q900,157 from NXP Semiconductors is an AEC-Q100 qualified automotive LCD controller and driver IC that interfaces microcontrollers to static or multiplexed LCDs with up to 4 backplanes and 40 segments. It operates via I²C-bus, features 40 × 4-bit display RAM, internal LCD bias generation, and supports 1:1 (static) to 1:4 multiplex drive modes. It is used in instrument clusters, HVAC displays, and automotive infotainment panels requiring low-power, high-reliability segment driving.
For engineers reviewing the PCA8576CH/Q900,157 datasheet, PCA8576CH/Q900,157 pinout, PCA8576CH/Q900,157 application, or PCA8576CH/Q900,157 equivalent, this device delivers verified automotive-grade LCD drive capability with no external bias components, selectable multiplexing, and cascading support for large displays - critical for ECU display subsystem design and BOM simplification.
Technical Context
The PCA8576CH/Q900,157 integrates a 40-segment × 4-backplane LCD driver with I²C interface, internal oscillator (enabled via OSC pin), and programmable display RAM addressing. Its timing engine derives LCD frame frequency (69 Hz nominal in normal mode, 65 Hz in power-saving mode) from either internal oscillator or external clock applied to CLK pin.
It implements hardware subaddressing (A0–A2 pins) and auto-incremented data loading across cascaded devices, enabling seamless expansion to 2560 segments. Display RAM bank switching and output bank selection are synchronized to multiplex phase, ensuring correct segment/backplane waveform alignment per drive mode (static, 1:2, 1:3, or 1:4).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Display Capacity | Up to 40 segments × 4 backplanes = 160 LCD elements; supports 20×7-seg or 10×14-seg alphanumeric displays. |
| I²C Interface | Standard-mode (100 kHz max); bidirectional SDA/SCL with hardware subaddressing (A0–A2) and device-select command. |
| Drive Modes | Configurable static, 1:2, 1:3, or 1:4 multiplex; bias selectable as static, 1/2, or 1/3 via mode-set command. |
| Display RAM | 40 × 4-bit static RAM; one-to-one mapping between RAM bits and LCD elements; auto-incremented addressing per drive mode. |
| Power Supply Range | VDD: 2 V to 6 V logic supply; VLCD: independent 2 V to 6 V LCD supply; enables compatibility with low-threshold and guest-host LCDs. |
| Operating Temperature | −40 °C to +105 °C; qualified per AEC-Q100 Grade 2 for automotive under-hood and dashboard applications. |
| Frame Frequency | 69 Hz (normal-power mode) or 65 Hz (power-saving mode) at fclk = 200 kHz; derived from integer division of clock frequency. |
Pinout & Package
LQFP64 package (SOT314-2), 10 mm × 10 mm × 1.4 mm body, with exposed thermal pad. Pin 1 marked by dot; top-view pinout matches Figure 2 in NXP Rev. 3 datasheet (8 April 2015).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDA (Pin 10) | I²C serial data I/O | Bidirectional open-drain interface; requires external pull-up; handles command/data transfer and ACK/NACK. |
| SCL (Pin 11) | I²C serial clock input | Master-generated clock; synchronizes all I²C transactions including display RAM writes and mode commands. |
| SYNC (Pin 12) | Cascade synchronization I/O | Propagates timing sync between daisy-chained PCA8576C devices; ensures frame-aligned multiplexing across multiple ICs. |
| CLK (Pin 13) | External clock I/O | Input when OSC = VDD; output when OSC = VSS (drives next device's CLK); sets fclk for frame timing and I²C throughput. |
| OSC (Pin 15) | Oscillator enable control | Logic low (VSS) enables internal oscillator; logic high (VDD) disables it and enables external clock on CLK pin. |
| A0–A2 (Pins 16–18) | Hardware subaddress inputs | Set 3-bit device address offset; enables up to 8 PCA8576C devices on same I²C bus without address conflict. |
| SA0 (Pin 19) | I²C slave address bit 0 | Defines LSB of 7-bit I²C address (base 0x70 or 0x71); combined with A0–A2 for full device addressing in cascades. |
| BP0–BP3 (Pins 25–28) | LCD backplane outputs | Driven waveforms synchronized to multiplex phase; configurable for 1:1 to 1:4 drive; can be paralleled for higher current. |
| S0–S39 (Pins 2–7, 29–32, 34–47, 49–64) | LCD segment outputs | 40 dedicated CMOS outputs; directly connect to LCD segments; unused pins left open-circuit. |
| VDD (Pin 14), VSS (Pin 20), VLCD (Pin 21) | Power supplies | VDD/VSS: digital core supply; VLCD: independent LCD bias supply; allows separate regulation for optimal contrast and lifetime. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LCD bias generator | Eliminates external resistive divider or charge pump; provides precise 1/2 or 1/3 bias from internal resistor network tied between VDD and VLCD. |
| Auto-incremented RAM addressing | Data pointer increments by 2 (1:4), 3 (1:3), 4 (1:2), or 8 (static) per byte written - matching multiplex depth to minimize host CPU overhead. |
| Cascadable architecture | SYNC and CLK pins enable deterministic timing across up to 64 devices (2560 segments); subaddressing ensures seamless RAM wrap-around during bulk writes. |
| Power-saving mode | Reduces clock division ratio by 6×, lowering fclk and dynamic power; maintains full functionality while extending battery life in telematics and keyless entry displays. |
| AEC-Q100 Grade 2 qualification | Validated for −40 °C to +105 °C operation with stress testing per automotive reliability standards - suitable for direct mounting in instrument clusters. |
Applications
| Automotive Instrument Cluster | Automotive HVAC Display |
|---|---|
Use Scenario: Driving digital speedometer, fuel gauge, and warning icons in analog/digital hybrid dashboards. IC Role / Device Role / Timing Role: Primary LCD segment driver; generates time-multiplexed BP/SEG waveforms synchronized to 69 Hz frame rate; receives display updates via I²C from MCU. Use Value: Enables compact, single-chip solution for 160-element cluster displays without external bias circuitry - reducing PCB area and qualification effort. |
Use Scenario: Controlling multi-zone temperature, fan speed, and air direction indicators in vehicle climate control panels. IC Role / Device Role / Timing Role: Dedicated display controller handling 10×14-segment alphanumeric layout; manages blinking modes for active status feedback. Use Value: Supports independent blink control per digit/segment group, improving UI responsiveness without MCU intervention. |
| Automotive Infotainment Status Panel | Commercial Vehicle Telematics Display |
Use Scenario: Rendering signal strength, Bluetooth pairing status, and audio source icons on small auxiliary LCDs near center console. IC Role / Device Role / Timing Role: Secondary display driver in multi-display system; configured in 1:2 multiplex mode for fast update and low EMI. Use Value: Low-power operation and I²C address flexibility allow coexistence with main infotainment SoC on shared bus without arbitration conflicts. |
Use Scenario: Displaying GPS location, diagnostic codes, and fleet ID on ruggedized cab-mounted terminals. IC Role / Device Role / Timing Role: High-reliability segment driver operating in extended temperature range; uses power-saving mode during idle to extend battery backup runtime. Use Value: AEC-Q100 qualification and 105 °C rating ensure stable operation in hot cab environments where passive cooling dominates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF8576T/1,118 | Same 40×4 architecture and I²C interface but VSO56 package; lacks AEC-Q100 qualification; max Tj = 85 °C. | Targeted at industrial HMI, not automotive; unsuitable for under-dash deployment due to temperature and reliability limits. | Select only for non-automotive cost-sensitive designs where AEC-Q100 is not required. |
| MAX6955ATL+T | 40-segment LED/LCD driver with integrated boost converter; supports higher VLCD (up to 12 V); no native 1:4 multiplex mode. | Optimized for LED multiplexing; LCD support limited to static/1:2; requires external components for bias scaling. | Choose when mixed LED/LCD panels or >6 V LCD bias is needed; avoid when strict 1:4 multiplex or AEC-Q100 compliance is mandatory. |
Compared with PCF8576T/1,118 and MAX6955ATL+T, the PCA8576CH/Q900,157 uniquely combines AEC-Q100 Grade 2 qualification, 1:4 multiplex capability, and zero-external-bias operation - making it the only drop-in solution for automotive LCD modules requiring full 160-element drive at 105 °C.
Availability
PCA8576CH/Q900,157 is available at Aetrix Electronics and suitable for automotive instrument clusters, HVAC control panels, and telematics displays requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for PCA8576CH/Q900,157 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 automotive-grade mixed-signal ICs.
The PCA8576C product line was designed specifically for automotive LCD display subsystems requiring high reliability, low power, and minimal external components - targeting instrument clusters, center stack displays, and body control modules.
FAQ
What is the maximum LCD segment count supported by the PCA8576CH/Q900,157 in a single-device configuration?
The PCA8576CH/Q900,157 supports up to 40 segments and 4 backplanes, enabling 160 distinct LCD elements (e.g., 20×7-segment digits or 10×14-segment characters). This capacity is fixed per device and does not scale with voltage or clock settings - it is defined by the internal 40×4-bit display RAM and output pin count. Cascading multiple PCA8576CH/Q900,157 units extends total segment count to 2560.
Does the PCA8576CH/Q900,157 require external components for LCD bias generation?
No, the PCA8576CH/Q900,157 includes an integrated LCD bias generator with internal resistor network between VDD and VLCD, supporting static, 1/2, and 1/3 bias configurations without external components. This eliminates need for external voltage dividers or charge pumps - a key differentiator versus legacy drivers like HD44102 or SED1520 - and is confirmed in Section 7.2 and Table 6 of the NXP datasheet.
How does the PCA8576CH/Q900,157 handle I²C communication in cascaded configurations?
In cascaded systems, the PCA8576CH/Q900,157 uses hardware subaddressing (A0–A2 pins) and device-select commands to assign unique logical addresses. Data writes auto-wrap across devices when the display RAM boundary is exceeded, and SYNC pin ensures frame-aligned timing. Each device processes only data matching its subaddress - verified in Section 7.13 and Figure 13 of the datasheet.
What are the power supply requirements for the PCA8576CH/Q900,157?
The PCA8576CH/Q900,157 requires three supplies: VDD (2 V to 6 V, digital core), VSS (ground), and VLCD (2 V to 6 V, LCD bias). VDD and VLCD may be independently regulated - critical for optimizing contrast across LCD types. The datasheet specifies no minimum delta between VDD and VLCD, and operation is valid even when VDD = VLCD = 3.3 V or 5 V.
Is the PCA8576CH/Q900,157 pin-compatible with other members of the PCA8576C family?
Yes, the PCA8576CH/Q900,157 (LQFP64) shares identical pinout with other PCA8576CH variants, including PCA8576CH/Q900/1. However, it is not pin-compatible with PCA8576CT (VSO56, 56-pin), which has different pin count, layout, and assignment - confirmed in Tables 1 and 4 of the datasheet. Subaddressing and functional behavior remain consistent across packages.
PCA8576CH/Q900,157 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- Product Status:
- Discontinued at Digi-Key
- 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)
PCA8576CH/Q900,157 FAQ
1.How can I place an order for PCA8576CH/Q900,157 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA8576CH/Q900,157 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 PCA8576CH/Q900,157 reliable?
The price and inventory of PCA8576CH/Q900,157 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA8576CH/Q900,157 is usually 5 days.
3.What payment methods are accepted for PCA8576CH/Q900,157?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA8576CH/Q900,157 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA8576CH/Q900,157?
PCA8576CH/Q900,157 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA8576CH/Q900,157 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 PCA8576CH/Q900,157?
For technical support, including PCA8576CH/Q900,157 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA8576CH/Q900,157 requirements.
6.How does Aetrix verify that PCA8576CH/Q900,157 is sourced from the original manufacturer or authorized distributors?
All PCA8576CH/Q900,157 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 PCA8576CH/Q900,157 meets industry standards.
7.What is the process for return or replacement of PCA8576CH/Q900,157?
All PCA8576CH/Q900,157 units undergo pre-shipment inspection (PSI). If there is an issue with PCA8576CH/Q900,157, 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 PCA8576CH/Q900,157 part is unused and in its original packaging.
Return procedure for PCA8576CH/Q900,157:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA8576CH/Q900,157 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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