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NXP Semiconductors PCF8534AHL/1,518
- Part No.:
- PCF8534AHL/1,518
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 80-LQFP
- Datasheet:
-
PCF8534AHL/1,518.pdf
- Description:
- IC LCD DISPLAY DRVR 60SEG 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,385
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Product details
Overview
PCF8534AHL/1 from NXP Semiconductors is a single-chip LCD controller and driver IC designed for static or low-multiplex-rate LCDs with up to 4 backplanes and 60 segments. It supports 1:2, 1:3, and 1:4 multiplexing with selectable 1/2 or 1/3 bias, operates from 1.8 V to 5.5 V logic supply and 2.5 V to 6.5 V LCD supply, and communicates via 400 kHz I²C-bus - enabling compact instrumentation displays in automotive dashboards and industrial HMI panels.
For engineers reviewing the PCF8534AHL/1 datasheet, PCF8534AHL/1 pinout, PCF8534AHL/1 application, or PCF8534AHL/1 equivalent, key selection considerations include its LQFP80 package with 80 pins, 60 × 4-bit display RAM, internal LCD bias generation, cascading capability for larger displays, and AEC-Q100 compliance (in AH/1 variant) - all critical for legacy automotive and industrial LCD interface design.
Technical Context
The PCF8534AHL/1 implements a dedicated LCD drive architecture with hardware-controlled multiplex timing, auto-incremented display RAM addressing, and subaddress-based bank selection over I²C. Its internal voltage divider generates fractional LCD bias (1/2 or 1/3) without external components, while the oscillator control pin (OSC) selects between internal 1536 Hz clock or external clock input.
Frame frequency is derived as ffr = fclk/24 (typical), supporting stable 64 Hz operation at 1536 Hz clock. Cascading is enabled via SYNC pin (active-low synchronization signal), and display memory switching allows independent control of static/duplex modes - essential for dynamic segment updates in multi-page LCD interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Display Drive Capability | Up to 4 backplanes and 60 segments - supports 30×7-seg digits, 15×14-seg alphanumerics, or 240-element graphics. |
| I²C Interface Speed | 400 kHz - enables fast host microcontroller communication with minimal bus overhead. |
| Logic Supply Range | 1.8 V to 5.5 V - ensures compatibility with modern low-voltage MCUs and legacy 5 V systems. |
| LCD Supply Range | 2.5 V to 6.5 V - accommodates both low-threshold and high-threshold twisted nematic LCDs. |
| Display RAM Size | 60 × 4-bit static RAM - stores full segment state per backplane row with one-to-one bit-to-element mapping. |
| Multiplex Configurations | Static, 1:2, 1:3, or 1:4 - selectable via command register; 1:4 mode uses BP0–BP3 outputs with 1/3 bias. |
| Frame Frequency | 64 Hz typical at 1536 Hz clock - meets human-eye persistence requirements for flicker-free display. |
Pinout & Package
PCF8534AHL/1 is housed in an LQFP80 package (SOT315-1): plastic low-profile quad flat package, 12 mm × 12 mm × 1.4 mm body, 80 leads, tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S0–S30, S31–S59 | LCD segment outputs | 60 total segment drivers - S0–S30 on pins 50–80; S31–S59 on pins 1–29 - directly connect to LCD segment electrodes. |
| BP0–BP3 | LCD backplane outputs | Four dedicated backplane drivers - used simultaneously in 1:4 mode; configurable pairing (e.g., BP0/BP2) in 1:2 mode for enhanced drive. |
| SDA / SCL | I²C serial data/clock | Standard bidirectional I²C interface - supports multi-master systems and slave address selection via SA0/A0–A2. |
| OSC / CLK / SYNC | Oscillator control / clock I/O / cascade sync | OSC selects internal/external clock; CLK outputs internal clock for cascaded devices; SYNC enables synchronized frame timing across multiple PCF8534AHL/1 units. |
| VDD / VSS / VLCD | Logic supply / ground / LCD supply | Independent power domains - VDD/VSS for logic core (1.8–5.5 V); VLCD for LCD bias generation (2.5–6.5 V). |
| A0–A2 / SA0 | Subaddress / slave address inputs | Hardware-configurable I²C subaddress (3-bit) and slave address bit (SA0) - enables up to 8 devices on same I²C bus with unique RAM access windows. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LCD bias generator | Eliminates external resistive divider - provides precise 1/2 or 1/3 bias from VLCD using internal switched impedance network. |
| Auto-incremented RAM addressing | Reduces I²C transaction count - display data writes automatically advance pointer by 2 (1:4), 3 (1:3), 4 (1:2), or 8 (static) bytes per transfer. |
| Cascading support via SYNC pin | Enables synchronous frame updates across multiple PCF8534AHL/1 - prevents visual tearing in large segmented displays. |
| Display memory bank switching | Allows real-time swap between active/inactive RAM banks in static and duplex modes - enables flicker-free page transitions. |
| Versatile blinking control | Hardware-managed blink timing - frees MCU resources and ensures consistent blink rate independent of host software latency. |
Applications
| Automotive Instrument Clusters | Industrial Control Panels |
|---|---|
Use Scenario: Driving analog-style gauge overlays and digital trip/fuel readouts in vehicle dashboards. IC Role / Device Role / Timing Role: LCD controller and driver - generates multiplexed waveforms, manages 60-segment RAM, and synchronizes frame updates across dual-gauge displays. Use Value: AEC-Q100-compliant variant (PCF8534AH/1) ensures reliability under automotive temperature and vibration stress; 1:4 multiplexing reduces interconnect count versus discrete solutions. |
Use Scenario: Displaying status indicators, setpoint values, and alarm messages on factory HMIs and PLC operator interfaces. IC Role / Device Role / Timing Role: Dedicated LCD interface peripheral - offloads segment timing and bias generation from main MCU, freeing CPU cycles for real-time control tasks. Use Value: Wide 1.8–5.5 V logic supply range enables direct integration with 3.3 V industrial MCUs; no external bias components reduce BOM cost and board area. |
| Medical Device Displays | Consumer Appliance UIs |
Use Scenario: Powering segmented LCDs in portable blood pressure monitors and infusion pump status screens. IC Role / Device Role / Timing Role: Low-power LCD driver - delivers stable contrast across battery voltage decay using programmable bias and VLCD regulation. Use Value: 2.5–6.5 V LCD supply range accommodates aging battery packs; 400 kHz I²C minimizes update latency during critical parameter changes. |
Use Scenario: Controlling time, temperature, and cycle status on microwave ovens, washing machines, and HVAC remotes. IC Role / Device Role / Timing Role: Cost-optimized LCD interface - integrates RAM, timing, and drive circuitry into single LQFP80 package for high-volume manufacturing. Use Value: Cascading capability allows reuse of same PCB layout for different display sizes; 60-segment capacity supports complex multi-field alphanumeric displays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD controller and driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF85134HL/1 | Direct replacement per NXP documentation; identical pinout, enhanced ESD rating, updated process node. | Same 4-backplane/60-segment capability; supports identical I²C protocol and RAM structure. | Recommended for new designs - supersedes PCF8534AHL/1 with improved robustness and lifecycle support. |
| PCF8576CT/1 | 64-segment, 4-backplane driver; 400 kHz I²C; wider 2.7–6.0 V LCD supply; no AEC-Q100 variant. | Higher segment count but lacks cascading SYNC pin and subaddress banking - limits scalability. | Consider when higher segment density is needed and cascading is not required; verify VLCD compatibility with existing LCD modules. |
Compared with PCF8534AHL/1, PCF85134HL/1 offers drop-in replacement with enhanced reliability, while PCF8576CT/1 trades cascading flexibility for marginally higher segment count - making the former ideal for legacy design refresh and the latter suitable for simpler, non-cascaded displays.
Availability
PCF8534AHL/1 is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial control panels, and medical device displays requiring stable component supply and long-term obsolescence management.
Supply support for PCF8534AHL/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 leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications - with deep expertise in mixed-signal interface ICs and display controllers.
The PCF8534AHL/1 belongs to NXP's universal LCD driver family, engineered specifically for cost-sensitive, low-multiplex-rate segmented displays in harsh environments - emphasizing integration, bias stability, and I²C efficiency.
FAQ
What is the primary function of the PCF8534AHL/1 in an LCD system?
The PCF8534AHL/1 serves as a complete LCD controller and driver IC that generates multiplexed segment and backplane waveforms, manages 60 × 4-bit display RAM, and handles I²C communication with the host microcontroller. It eliminates the need for external bias generators or timing components, directly driving LCDs with up to four backplanes and 60 segments - making it ideal for instrumentation and HMI applications where space and BOM count are constrained. The PCF8534AHL/1 integrates all essential timing, memory, and drive circuitry into a single LQFP80 package.
Does the PCF8534AHL/1 support cascading for larger LCDs?
Yes, the PCF8534AHL/1 supports hardware-synchronized cascading via its dedicated SYNC pin (pin 42), which functions as both input and output for active-low frame synchronization. When multiple PCF8534AHL/1 devices are connected in series, the SYNC signal ensures simultaneous frame updates across all units - preventing visual artifacts like tearing or partial refresh. This capability is explicitly documented in the datasheet and requires no additional firmware coordination beyond standard I²C addressing using A0–A2 and SA0 pins. The PCF8534AHL/1's cascading architecture is validated for use in multi-gauge automotive clusters and extended industrial displays.
What are the valid LCD bias configurations supported by the PCF8534AHL/1?
The PCF8534AHL/1 supports static, 1/2, and 1/3 LCD bias configurations - selected via command register and matched to the chosen drive mode (static, 1:2, 1:3, or 1:4 multiplex). In 1:2 mode, both 1/2 and 1/3 bias are available; in 1:3 and 1:4 modes, only 1/3 bias is supported. The internal voltage divider generates these ratios without external components, and VLCD must be set within 2.5 V to 6.5 V to maintain proper RMS on/off voltages per the discrimination ratio equations in the datasheet. The PCF8534AHL/1 does not support 1/4 or other fractional biases.
Is the PCF8534AHL/1 suitable for new designs?
No - NXP explicitly states "PCF8534AHL/1 should not be used for new design-ins" and designates PCF85134HL/1 as the official replacement part. While the PCF8534AHL/1 remains available for legacy production and repair, its obsolescence status means limited long-term supply assurance, no future process improvements, and no new technical support releases. For any new schematic or layout work, engineers must use PCF85134HL/1, which maintains pin-to-pin and functional compatibility while offering enhanced ESD performance and extended lifecycle commitment. The PCF8534AHL/1 is appropriate only for sustaining engineering of existing products.
How does the PCF8534AHL/1 handle display RAM addressing during I²C writes?
The PCF8534AHL/1 uses two coordinated mechanisms: a data pointer and a subaddress counter. The data pointer (initialized via load-data-pointer command) determines the starting RAM address; after each byte write, it auto-increments by 2 (1:4), 3 (1:3), 4 (1:2), or 8 (static) to match the drive mode's RAM organization. Simultaneously, the subaddress counter (set via device-select command) must match hardware pins A0–A2 to enable writes - ensuring only targeted devices in a multi-unit I²C system accept data. This dual-layer addressing prevents unintended RAM updates and enables precise bank selection. The PCF8534AHL/1's RAM structure is strictly 60 × 4-bit with fixed row/column mapping to BP0–BP3 and S0–S59.
PCF8534AHL/1,518 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 80-LQFP
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Display Type:
- LCD
- Configuration:
- 60 Segment
- Interface:
- I2C
- Digits or Characters:
- -
- 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:
- 80-LQFP (12x12)
PCF8534AHL/1,518 FAQ
1.How can I place an order for PCF8534AHL/1,518 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCF8534AHL/1,518 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 PCF8534AHL/1,518 reliable?
The price and inventory of PCF8534AHL/1,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCF8534AHL/1,518 is usually 5 days.
3.What payment methods are accepted for PCF8534AHL/1,518?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCF8534AHL/1,518 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCF8534AHL/1,518?
PCF8534AHL/1,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCF8534AHL/1,518 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 PCF8534AHL/1,518?
For technical support, including PCF8534AHL/1,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCF8534AHL/1,518 requirements.
6.How does Aetrix verify that PCF8534AHL/1,518 is sourced from the original manufacturer or authorized distributors?
All PCF8534AHL/1,518 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 PCF8534AHL/1,518 meets industry standards.
7.What is the process for return or replacement of PCF8534AHL/1,518?
All PCF8534AHL/1,518 units undergo pre-shipment inspection (PSI). If there is an issue with PCF8534AHL/1,518, 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 PCF8534AHL/1,518 part is unused and in its original packaging.
Return procedure for PCF8534AHL/1,518:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCF8534AHL/1,518 Tags
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PCA8561AHN/AY
NXP Semiconductors
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SN74LS47N
Texas Instruments
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PCF85176T/1Y
NXP Semiconductors
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PCF85176H/1,518
NXP Semiconductors
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BU9796AMUV-E2
Rohm Semiconductor
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PCA85176H/Q900/1,5
NXP Semiconductors
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PCF8537AH/1,518
NXP Semiconductors
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LM3914VX/NOPB
Texas Instruments
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PCF85134HL/1,118
NXP Semiconductors
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AS1115-BSST
ams-OSRAM USA INC.
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PCA8534AH/Q900/1,5
NXP Semiconductors
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LM3914V/NOPB
Texas Instruments
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