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NXP Semiconductors PCA85276ATT/AJ
- Part No.:
- PCA85276ATT/AJ
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
PCA85276ATT/AJ.pdf
- Description:
- IC DRVR 7 SEGMENT 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,811
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Product details
Overview
PCA85276ATT/AJ from NXP Semiconductors is an AEC-Q100 Grade 2 automotive LCD controller/driver IC supporting up to 40 segments × 4 backplanes (160 elements), operating from 1.8 V to 5.5 V logic supply and up to 8.0 V VLCD, with I²C-bus interface (400 kHz) and internal bias generation - used in instrument cluster and center-stack displays requiring static or 1:2/1:3/1:4 multiplexed drive.
For engineers reviewing the PCA85276ATT/AJ datasheet, PCA85276ATT/AJ pinout, PCA85276ATT/AJ application, or PCA85276ATT/AJ equivalent, key selection criteria include its 40×4-bit display RAM, selectable multiplex mode (static/1:2/1:3/1:4), dual-bank RAM switching for flicker-free updates, independent VLCD/logic supplies, and cascade capability for large-panel systems.
Technical Context
The PCA85276ATT/AJ implements a dedicated LCD timing engine with programmable frame frequency derived from internal oscillator (OSC→VSS) or external clock (OSC→VDD), synchronized across cascaded devices via SYNC pin. Its display RAM organization maps directly to segment/backplane outputs with auto-increment addressing per drive mode.
It supports hardware subaddressing (A0/A1) for multi-device I²C bus management and uses command-based control (mode-set, bank-select, blink-select) with continuation-bit protocol to minimize bus overhead. The device features voltage-follower LCD bias buffers and configurable blink modes including alternate-bank blinking in static/1:2 modes.
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 layouts |
| I²C Interface Speed | 400 kHz maximum - enables fast display data loading without MCU resource contention |
| Supply Voltage Range | VDD: 1.8 V–5.5 V; VLCD: 2.5 V–8.0 V - accommodates low-threshold guest-host and high-threshold TN LCDs |
| Operating Temperature | −40 °C to +105 °C - qualified for under-hood and dashboard automotive environments |
| Display RAM | 40 × 4-bit static RAM with auto-increment addressing and dual-bank switching - enables seamless display updates without visible flicker |
| Multiplex Modes | Static, 1:2, 1:3, or 1:4 - selected via mode-set command; determines RAM row usage and segment drive timing |
| AEC-Q100 Grade | Grade 2 (−40 °C to +105 °C) - certified for automotive infotainment and instrumentation applications |
Pinout & Package
TSSOP56 package (SOT364-1), 56-pin plastic thin shrink small outline, 6.1 mm body width, 0.5 mm pitch - surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDA (44) | I²C serial data line | Open-drain bidirectional interface; requires external pull-up; handles command/data transfers with continuation-bit protocol |
| SCL (45) | I²C serial clock input | Master-generated clock up to 400 kHz; synchronizes all I²C transactions including auto-incremented RAM writes |
| BP0–BP3 (1,2,3,56) | LCD backplane outputs | Four dedicated outputs supporting static or 1:2/1:3/1:4 multiplexed drive; each drives one backplane waveform |
| S0–S39 (4–43) | LCD segment outputs | 40 CMOS outputs driving individual LCD segments; mapped 1:1 to display RAM columns |
| VLCD (55) | LCD supply voltage | Independent analog supply (2.5–8.0 V); powers internal bias generator and segment/backplane drivers |
| OSC (49) | Oscillator enable input | Connect to VSS for internal oscillator; connect to VDD for external clock input on CLK pin |
| SYNC (46) | Cascade synchronization | Output when used as master; input when slave - ensures frame-aligned timing across daisy-chained PCA85276 devices |
| SA0 (53) | I²C address select | Configures LSB of 7-bit I²C address (0x70–0x77); allows up to 8 devices on same bus |
Key Features
| Feature | Design Value |
|---|---|
| Hardware subaddressing (A0/A1) | Enables cascading up to 4 devices per I²C address via configurable subaddress counter - eliminates software address translation overhead |
| Dual-bank RAM switching | Allows background preparation of next display frame in alternate RAM bank (rows 2/3) while current frame (rows 0/1) is active - enables zero-flicker transitions |
| Internal LCD bias generator | Generates precise 1/2 or 1/3 bias voltages using switched impedance divider - eliminates external resistors and reduces BOM count |
| Versatile blink control | Supports normal blinking (entire display) or alternate-bank blinking (static/1:2 modes) at user-selectable frequencies - implemented entirely in hardware without MCU intervention |
| No external components required | Integrates oscillator, bias generator, display RAM, and timing logic - reduces PCB area and qualification effort for automotive modules |
Applications
| Automotive Instrument Cluster | Center-Stack Infotainment Display |
|---|---|
Use Scenario: Driving information display (speed, RPM, fuel, warnings) in analog/digital hybrid gauges. IC Role / Device Role / Timing Role: Primary LCD driver managing 40-segment bar graphs and 14-segment alphanumeric fields; generates multiplexed waveforms synchronized to vehicle CAN bus timing. Use Value: AEC-Q100 Grade 2 qualification and −40 °C to +105 °C operation ensure reliability in dashboard thermal environments; dual-bank RAM prevents flicker during real-time gauge updates. |
Use Scenario: Secondary status display for HVAC, media, and connectivity settings in central console. IC Role / Device Role / Timing Role: Dedicated segment driver offloading main SoC; interfaces via I²C with auto-incremented RAM writes to reduce host CPU load. Use Value: 400 kHz I²C speed and subaddressing support rapid configuration of multi-character strings; independent VLCD supply enables compatibility with diverse LCD panel vendors. |
| Commercial Vehicle Telematics Panel | Industrial HMI with LCD Keypad |
Use Scenario: Ruggedized fleet management display showing GPS, payload, and diagnostic codes in cab-mounted units. IC Role / Device Role / Timing Role: Cascaded LCD controller driving extended 120+ segment panels; SYNC pin ensures frame coherence across multiple PCA85276ATT/AJ devices. Use Value: Cascade capability supports up to 1280 segments; wide VLCD range (2.5–8.0 V) accommodates high-contrast twisted nematic LCDs used in sunlight-readable panels. |
Use Scenario: Factory floor operator interface with integrated LCD and tactile keypad feedback. IC Role / Device Role / Timing Role: Segment driver with independent logic/VLCD supplies - isolates noisy digital power from sensitive LCD bias rails. Use Value: Low-power design and 1.8 V minimum VDD allow integration into battery-backed HMIs; TSSOP56 package supports automated assembly and IPC Class 3 reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA85276ATT/AY | Identical electrical and functional specification; dry-pack packaging vs. non-dry pack for PCA85276ATT/AJ | No change in circuit design or layout; only moisture sensitivity level (MSL) and handling differ | Select PCA85276ATT/AY for production runs requiring MSL 3 compliance and longer floor life |
| PCF8576CT | 40×4 driver with identical pinout and I²C interface but lacks AEC-Q100 qualification and extended temperature range (−40 °C to +85 °C only) | Not suitable for automotive under-hood or dashboard use; limited to industrial/commercial HMIs | Choose PCF8576CT only for cost-sensitive non-automotive applications where Grade 2 qualification is unnecessary |
Compared with PCA85276ATT/AY, the PCA85276ATT/AJ offers identical functionality but requires non-dry-pack handling; versus PCF8576CT, it delivers automotive-grade reliability and wider temperature operation at higher cost and stricter logistics requirements.
Availability
PCA85276ATT/AJ is available at Aetrix Electronics and suitable for automotive instrument clusters, center-stack infotainment displays, and commercial vehicle telematics panels requiring stable component supply across long product lifecycles.
Supply support for PCA85276ATT/AJ 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 headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The PCA85276ATT/AJ belongs to NXP's automotive LCD driver product line, designed specifically for AEC-Q100-compliant segmented display interfaces in harsh-temperature vehicle environments with minimal external component count.
FAQ
What is the primary function of the PCA85276ATT/AJ in an automotive display system?
The PCA85276ATT/AJ serves as a dedicated LCD controller and driver IC that generates multiplexed segment and backplane waveforms for up to 160-element LCD panels. It interfaces with microcontrollers via I²C, manages display RAM, provides internal bias generation, and supports cascade configurations - enabling reliable, low-overhead display control in automotive instrument clusters and infotainment systems. The PCA85276ATT/AJ eliminates need for external bias resistors and timing components.
Does the PCA85276ATT/AJ require external components to operate?
No, the PCA85276ATT/AJ operates without external components for core functionality: its internal oscillator (enabled by OSC→VSS), voltage-follower LCD bias generator, and 40×4-bit display RAM are fully integrated. Only mandatory connections are VDD, VSS, VLCD, SDA, SCL, and the LCD panel itself. External pull-up resistors on SDA/SCL are required per I²C specification but are not considered functional components of the PCA85276ATT/AJ circuit.
How does the PCA85276ATT/AJ handle display updates to avoid visible flicker?
The PCA85276ATT/AJ uses dual-bank RAM switching in static and 1:2 multiplex modes: one bank (e.g., rows 0/1) drives the active display while the other (rows 2/3) accepts new data. A single bank-select command switches output source instantly - enabling flicker-free frame transitions. This hardware-managed approach requires no MCU intervention beyond issuing the command, unlike software-timed updates that risk partial-frame visibility.
Can multiple PCA85276ATT/AJ devices be connected on the same I²C bus?
Yes, up to eight PCA85276ATT/AJ devices can share one I²C bus using SA0 pin to set unique 7-bit addresses (0x70–0x77). For larger displays, devices can also be cascaded using SYNC pin to align frame timing - allowing coordinated drive of panels exceeding 160 segments. Hardware subaddressing (A0/A1) further enables efficient data distribution across cascaded units without address conflicts.
What is the significance of the "/AJ" suffix in PCA85276ATT/AJ?
"/AJ" denotes the specific ordering variant of the PCA85276ATT/AJ: reel packaging with 13-inch non-dry pack (Q1) - indicating moisture sensitivity level (MSL) 3 and requiring bake-out before reflow if exposed to ambient humidity beyond floor life. This differs from /AY (dry pack, MSL 3 with extended floor life) but shares identical electrical, thermal, and functional specifications with all PCA85276ATT variants.
PCA85276ATT/AJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 56-TFSOP (0.240", 6.10mm Width)
- 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:
- 6 µA
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TSSOP
PCA85276ATT/AJ FAQ
1.How can I place an order for PCA85276ATT/AJ through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA85276ATT/AJ 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 PCA85276ATT/AJ reliable?
The price and inventory of PCA85276ATT/AJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA85276ATT/AJ is usually 5 days.
3.What payment methods are accepted for PCA85276ATT/AJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA85276ATT/AJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA85276ATT/AJ?
PCA85276ATT/AJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA85276ATT/AJ 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 PCA85276ATT/AJ?
For technical support, including PCA85276ATT/AJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA85276ATT/AJ requirements.
6.How does Aetrix verify that PCA85276ATT/AJ is sourced from the original manufacturer or authorized distributors?
All PCA85276ATT/AJ 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 PCA85276ATT/AJ meets industry standards.
7.What is the process for return or replacement of PCA85276ATT/AJ?
All PCA85276ATT/AJ units undergo pre-shipment inspection (PSI). If there is an issue with PCA85276ATT/AJ, 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 PCA85276ATT/AJ part is unused and in its original packaging.
Return procedure for PCA85276ATT/AJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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