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NXP Semiconductors PCA85134H/Q900/1,1
- Part No.:
- PCA85134H/Q900/1,1
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 80-LQFP
- Datasheet:
-
PCA85134H/Q900/1,1.pdf
- Description:
- IC DRVR 7 SEGMENT 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,080
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Product details
Overview
PCA85134H/Q900/1,1 from NXP Semiconductors is an automotive-grade LCD segment driver IC that interfaces microcontrollers to static or multiplexed LCDs with up to 4 backplanes and 60 segments. It supports 1:4 multiplex drive mode with 1⁄3 bias, operates from −40 °C to +95 °C, and features a 400 kHz I²C-bus interface for low-overhead display RAM access. It is used in instrument clusters and HVAC displays requiring AEC-Q100 compliance.
For engineers reviewing the PCA85134H/Q900/1,1 datasheet, PCA85134H/Q900/1,1 pinout, PCA85134H/Q900/1,1 application, or PCA85134H/Q900/1,1 equivalent, this page delivers verified technical context, exact pin functions, real-world drive-mode trade-offs, and validated alternatives for automotive LCD subsystem design.
Technical Context
The PCA85134H/Q900/1,1 integrates a 60 × 4-bit static display RAM with auto-incremented addressing and hardware subaddressing (A0–A2) to minimize I²C transaction overhead. Its internal LCD bias generator produces fractional voltages (static, 1⁄2, or 1⁄3) without external components, and its oscillator enables either internal clocking (OSC tied to VSS) or external synchronization (OSC tied to VDD).
Cascading is supported via SYNC pin for multi-driver systems, and display memory bank switching operates in both static and duplex modes. Backplane outputs BP0–BP3 are configurable per drive mode: all four active in 1:4 multiplex; BP0/BP2 and BP1/BP3 paired in 1:2; BP1/BP3 tied in 1:3; or all paralleled in static mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Display Capacity | Drives up to 60 segments × 4 backplanes = 240 LCD elements in 1:4 multiplex mode |
| Operating Temperature | −40 °C to +95 °C - qualified for under-hood and dashboard automotive environments |
| I²C Interface Speed | 400 kHz - enables fast display updates with minimal MCU intervention |
| LCD Supply Range | 2.5 V to 8.0 V - supports low-threshold and high-threshold twisted nematic LCDs |
| Logic Supply Range | 1.8 V to 5.5 V - allows direct interfacing with 1.8 V, 3.3 V, or 5 V microcontrollers |
| Drive Mode Flexibility | Configurable for static, 1:2, 1:3, or 1:4 multiplex with selectable 1⁄2 or 1⁄3 bias |
| Display RAM | 60 × 4-bit static RAM - stores full segment state per backplane row with one-to-one bit-to-element mapping |
Pinout & Package
LQFP80 package (SOT315-1), 12 mm × 12 mm × 1.4 mm body, 80-pin quad flat with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S0–S59 | LCD segment outputs | 60 dedicated outputs driving LCD segments; unused pins left open-circuit |
| BP0–BP3 | LCD backplane outputs | Four outputs supporting 1:4 multiplex; configurable pairing (e.g., BP0/BP2) for enhanced drive in lower-mux modes |
| SDA / SCL | I²C-bus interface | Standard bidirectional serial data and clock; supports multi-master and slave addressing |
| OSC / CLK | Oscillator control | OSC selects clock source (VSS = internal oscillator; VDD = external clock); CLK outputs internal clock for cascading |
| SYNC | Cascade synchronization | Active-low signal coordinating frame timing across multiple PCA85134H devices |
| A0–A2 / SA0 | Subaddressing | Hardware-selectable device address (3-bit subaddress + 1-bit SA0) enabling up to 16 devices on same I²C bus |
| VDD / VSS / VLCD | Power supplies | Separate logic (VDD/VSS) and LCD (VLCD) rails - decouples noise-sensitive display drive from digital core |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 3 qualification | Validated for automotive applications including instrument panels and climate controls |
| Integrated LCD bias generation | Eliminates external resistor networks and voltage dividers - reduces BOM count and layout area |
| Auto-incremented display RAM addressing | Reduces I²C transaction count during full-screen refresh - improves update efficiency |
| Cascadable architecture | Enables expansion beyond 60 segments using SYNC and CLK signals - no additional MCU GPIO required |
| Versatile blinking modes | Hardware-controlled blink timing independent of MCU - frees CPU resources for other tasks |
Applications
| Automotive Instrument Cluster | Automotive HVAC Display |
|---|---|
Use Scenario: Driving analog gauge overlays and digital trip/fuel readouts on segmented LCDs in vehicle dashboards. IC Role / Device Role / Timing Role: Primary LCD controller/driver handling multiplexed segment activation, bias generation, and I²C command decoding. Use Value: Enables compact, low-power, high-contrast display operation across −40 °C to +95 °C with AEC-Q100 reliability. | Use Scenario: Controlling alphanumeric temperature setpoints and fan-speed indicators on embedded HVAC control panels. IC Role / Device Role / Timing Role: Segment driver managing 14-segment characters and icon elements via 1:4 multiplex mode with 1⁄3 bias. Use Value: Delivers stable contrast at varying VLCD (2.5–8.0 V) to accommodate diverse LCD module suppliers and aging characteristics. |
| Industrial Control Panel | Medical Device Status Display |
Use Scenario: Driving segmented status indicators and parameter readouts on ruggedized HMI panels in factory automation equipment. IC Role / Device Role / Timing Role: Standalone LCD interface offloading display management from main MCU in resource-constrained designs. Use Value: Reduces firmware complexity via hardware subaddressing and display RAM auto-increment - accelerates time-to-market. | Use Scenario: Rendering battery level, alarm icons, and measurement units on portable diagnostic devices requiring long-term readability. IC Role / Device Role / Timing Role: Low-power LCD driver supporting static and 1:2 multiplex modes for ultra-low standby current (<1 µA typical). Use Value: Extends battery life through integrated bias generation and wide logic supply range (1.8–5.5 V) compatible with Li-ion and coin-cell systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD segment driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF8576D/1,118 | 64-segment × 4-backplane; 1.8–6.0 V logic supply; no AEC-Q100 qualification | Targeted at industrial/consumer LCDs - lacks automotive temperature and stress qualification | Select when AEC-Q100 is not required and wider logic voltage margin is needed |
| MAX6955ATL+T | 40-segment × 4-backplane; integrated charge pump; SPI interface only | Optimized for small-format alphanumeric displays with built-in boost converter - no I²C support | Select for space-constrained designs needing integrated VLCD generation and SPI-only host interfaces |
Compared with PCF8576D/1,118 and MAX6955ATL+T, the PCA85134H/Q900/1,1 uniquely combines AEC-Q100 compliance, 60-segment capacity, I²C interface, and flexible bias configuration - making it the only drop-in solution for automotive 1:4 multiplex LCDs requiring guaranteed operation at +95 °C.
Availability
PCA85134H/Q900/1,1 is available at Aetrix Electronics and suitable for automotive instrument clusters, HVAC control panels, and industrial HMIs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PCA85134H/Q900/1,1 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 PCA85134 product line delivers automotive-qualified LCD drivers optimized for high-reliability segmented displays in harsh environments - designed specifically for instrument clusters, center consoles, and cabin control systems.
FAQ
What is the maximum LCD multiplex ratio supported by the PCA85134H/Q900/1,1?
The PCA85134H/Q900/1,1 supports up to 1:4 multiplex ratio with four active backplane outputs (BP0–BP3). In this mode, it drives 60 segments across four backplanes, delivering 240 total display elements. The device also supports static, 1:2, and 1:3 configurations - all selectable via command register settings. Each mode uses corresponding bias (1⁄3 for 1:4, 1⁄2 or 1⁄3 for 1:2) to maintain contrast and RMS voltage compliance.
Does the PCA85134H/Q900/1,1 require external components for LCD bias generation?
No, the PCA85134H/Q900/1,1 includes an integrated LCD bias generator with internal voltage divider and follower buffers. It produces static, 1⁄2, or 1⁄3 bias levels directly from VLCD without external resistors or capacitors. This eliminates calibration drift and reduces PCB footprint - a key advantage over discrete bias solutions. The PCA85134H/Q900/1,1 datasheet confirms "no external components required" for standard operation.
How does cascading work with multiple PCA85134H/Q900/1,1 devices?
Cascading uses the SYNC pin (active-low) and CLK output to synchronize frame timing across multiple PCA85134H/Q900/1,1 devices. When OSC is tied to VSS, the first device's CLK pin drives the next device's CLK input, while SYNC propagates timing alignment. Subaddressing (A0–A2 and SA0) ensures each device responds only to its assigned I²C address. This allows seamless expansion beyond 60 segments without additional MCU GPIO or software overhead.
What is the purpose of the subaddress counter (A0–A2) on the PCA85134H/Q900/1,1?
The subaddress counter (A0–A2) enables hardware-based device selection within an I²C bus segment, allowing up to eight PCA85134H/Q900/1,1 devices to share the same bus. Each device is assigned a unique 3-bit subaddress via A0–A2 pins; the device-select command must match this value before display RAM writes are accepted. This prevents unintended writes during multi-device transactions and simplifies firmware addressing in cascaded or multi-display systems.
Can the PCA85134H/Q900/1,1 drive 7-segment or 14-segment alphanumeric displays?
Yes, the PCA85134H/Q900/1,1 is explicitly designed for alphanumeric segment displays: it can drive 30 seven-segment characters (including decimal point) or 15 fourteen-segment characters (including accent dot and decimal point) in 1:4 multiplex mode. The display RAM bit map provides one-to-one correspondence between RAM bits and physical segments, and the datasheet includes detailed filling-order diagrams (Figure 12) for all common character formats.
PCA85134H/Q900/1,1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 80-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Display Type:
- LCD
- Configuration:
- 7 Segment + DP, 14 Segment + DP + AP, Dot Matrix
- Interface:
- I2C
- Digits or Characters:
- 15 Characters, 30 Characters, 240 Elements
- Current - Supply:
- 8 µA
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 95°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 80-LQFP (12x12)
PCA85134H/Q900/1,1 FAQ
1.How can I place an order for PCA85134H/Q900/1,1 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA85134H/Q900/1,1 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 PCA85134H/Q900/1,1 reliable?
The price and inventory of PCA85134H/Q900/1,1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA85134H/Q900/1,1 is usually 5 days.
3.What payment methods are accepted for PCA85134H/Q900/1,1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA85134H/Q900/1,1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA85134H/Q900/1,1?
PCA85134H/Q900/1,1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA85134H/Q900/1,1 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 PCA85134H/Q900/1,1?
For technical support, including PCA85134H/Q900/1,1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA85134H/Q900/1,1 requirements.
6.How does Aetrix verify that PCA85134H/Q900/1,1 is sourced from the original manufacturer or authorized distributors?
All PCA85134H/Q900/1,1 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 PCA85134H/Q900/1,1 meets industry standards.
7.What is the process for return or replacement of PCA85134H/Q900/1,1?
All PCA85134H/Q900/1,1 units undergo pre-shipment inspection (PSI). If there is an issue with PCA85134H/Q900/1,1, 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 PCA85134H/Q900/1,1 part is unused and in its original packaging.
Return procedure for PCA85134H/Q900/1,1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA85134H/Q900/1,1 Tags
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