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NXP Semiconductors PCF8576DT/S400/2,1
- Part No.:
- PCF8576DT/S400/2,1
- Manufacturer:
- NXP Semiconductors
- Category:
- Display Drivers
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
PCF8576DT/S400/2,1.pdf
- Description:
- IC DRVR 7 SEGMENT 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,168
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Product details
Overview
PCF8576DT/S400/2,1 from NXP Semiconductors is an AEC-Q100 qualified 40 × 4 universal LCD driver IC for automotive applications, supporting static or 2–4 backplane multiplexing, 1⁄2 or 1⁄3 LCD bias configuration, and 400 kHz I²C-bus interface. It drives up to 160 LCD segments (e.g., 20×7-segment digits) with internal bias generation and operates from 1.8 V to 5.5 V logic supply and up to 6.5 V VLCD.
For engineers reviewing the PCF8576DT/S400/2,1 datasheet, PCF8576DT/S400/2,1 pinout, PCF8576DT/S400/2,1 application, or PCF8576DT/S400/2,1 equivalent, this page delivers verified technical context, exact pin functions, real drive-mode waveforms, confirmed automotive qualification, and validated alternative parts - all traceable to NXP's Rev. 15.1 datasheet and ordering documentation.
Technical Context
The PCF8576DT/S400/2,1 implements a fully integrated LCD controller/driver with 40×4-bit static display RAM, auto-incremented addressing, and hardware subaddressing for cascaded configurations. Its internal oscillator (enabled via OSC→VSS) or external clock (via CLK input) generates frame timing, with fixed division yielding frame frequency ffr = fclk/128.
It supports four drive modes: static (1 BP), 1:2 (2 BP), 1:3 (3 BP), and 1:4 (4 BP) multiplexing, each with selectable bias (1⁄2 or 1⁄3), and includes display memory bank switching, independent logic/LCD supplies, and versatile blinking control - all managed via I²C-bus commands without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Display Capacity | Drives up to 4 backplanes × 40 segments = 160 elements (e.g., 20×7-seg or 10×14-seg characters) |
| I²C Interface Speed | 400 kHz maximum - enables fast display updates without MCU resource overhead |
| Supply Voltage Range | 1.8 V to 5.5 V logic (VDD); VLCD up to 6.5 V - supports low-threshold and high-threshold TN LCDs |
| LCD Drive Modes | Static, 1:2, 1:3, or 1:4 multiplex - selected via command register; determines RAM fill pattern and waveform timing |
| Bias Configuration | Selectable 1⁄2 or 1⁄3 bias - sets internal voltage divider taps to achieve required discrimination ratio (e.g., 1.732 for 1:4) |
| Operating Temperature | −40 °C to +85 °C - qualified per AEC-Q100 Grade 3 for automotive instrument clusters and controls |
| Display RAM | 40 × 4-bit static RAM - one-to-one mapping between RAM bits, segment outputs (S0–S39), and backplane outputs (BP0–BP3) |
Pinout & Package
TSSOP56 package (SOT364-1), 6.1 mm body width, 56-pin plastic thin shrink small outline package. Pin functions validated per NXP datasheet Figure 2 and Table 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDA (pin 44) | I²C serial data bidirectional line | Open-drain interface requiring external pull-up; handles command/data transfer and ACK/NACK |
| SCL (pin 45) | I²C serial clock input | Master-generated clock synchronizing all I²C transactions; 400 kHz max rated frequency |
| OSC (pin 49) | Oscillator enable control | Connect to VSS to enable internal oscillator; connect to VDD to use external clock on CLK pin |
| CLK (pin 47) | External clock input/output | When OSC=VDD: accepts external clock; when OSC=VSS: outputs internal clock for cascading multiple PCF8576Ds |
| SYNC (pin 46) | Cascade synchronization I/O | Propagates frame sync across daisy-chained devices; must be left open if unused |
| A0–A2 (pins 50–52) | Hardware subaddress inputs | Set 3-bit device address offset for multi-device I²C bus; enables automatic RAM wrap-around in cascade |
| SA0 (pin 53) | I²C bus address bit 0 | Configures LSB of 7-bit slave address (default 0x70 or 0x71 depending on SA0 state) |
| BP0–BP3 (pins 56,1,2,3) | LCD backplane outputs | Drive complementary waveforms; in 1:2 mode BP0/BP2 and BP1/BP3 carry identical signals for enhanced current drive |
| S0–S39 (pins 4–43) | LCD segment outputs | Direct connection to LCD electrodes; unused pins may be left open-circuit |
| VLCD (pin 55) | LCD supply voltage input | Independent bias rail; sets full-scale LCD voltage (2.5 V–6.5 V) and determines RMS on/off voltages |
| VDD (pin 48), VSS (pin 54) | Logic power and ground | Separate supply domain from VLCD; enables mixed-voltage system integration |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 3 qualification | Validated for automotive environments (−40 °C to +85 °C), enabling use in instrument clusters and center displays |
| Internal LCD bias generator | Eliminates external resistors or DACs; provides precise 1⁄2 or 1⁄3 bias via on-chip voltage divider with temperature compensation support |
| Cascadable architecture | SYNC and CLK pins allow daisy-chaining up to 64 devices (2,560 segments) with automatic subaddress wraparound |
| Auto-incremented RAM addressing | Data pointer advances by 2 (1:4), 3 (1:3), 4 (1:2), or 8 (static) bytes per write - minimizes I²C transaction count for full-screen updates |
| Independent logic and LCD supplies | VDD (1.8–5.5 V) and VLCD (2.5–6.5 V) decoupled - permits optimal biasing for diverse LCD modules without level-shifting |
Applications
| Automotive Instrument Cluster | Industrial Control Panel |
|---|---|
Use Scenario: Driving segmented LCDs in vehicle speedometers, fuel gauges, and warning indicators with high reliability under temperature cycling. IC Role / Device Role / Timing Role: Primary LCD controller/driver handling multiplexed 4-backplane displays; manages frame timing via internal oscillator synchronized across multiple units. Use Value: AEC-Q100 qualification ensures operation at −40 °C to +85 °C; internal bias eliminates external components, reducing BOM cost and board space. | Use Scenario: Controlling alphanumeric LCDs in programmable logic controllers (PLCs), HMI panels, and factory automation interfaces. IC Role / Device Role / Timing Role: Standalone segment driver interfacing to microcontrollers via I²C; supports static or 2–4 BP multiplexing for flexible display sizing. Use Value: 400 kHz I²C allows rapid display refresh; wide VLCD range (2.5–6.5 V) accommodates legacy and modern TN LCD modules without redesign. |
| Medical Device Display | Consumer Appliance UI |
Use Scenario: Powering segmented status displays in portable diagnostic equipment where low power and ESD robustness are critical. IC Role / Device Role / Timing Role: Low-power LCD driver with independent VDD/VLCD rails; uses internal oscillator to minimize external timing components. Use Value: 1.8 V minimum VDD enables direct connection to 1.8 V/3.3 V MCUs; low quiescent current extends battery life in handheld units. | Use Scenario: Driving numeric displays in microwave ovens, washing machines, and HVAC thermostats with long product lifecycles. IC Role / Device Role / Timing Role: Fixed-function LCD peripheral offloading display management from main MCU; supports blinking and memory retention during sleep. Use Value: 40×4-bit RAM retains display content without host intervention; versatile blink modes simplify timer-based UI feedback (e.g., colon flashing). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA85176T/Q900/1 | Successor part with identical TSSOP56 footprint, AEC-Q100 qualification, and extended I²C timeout; adds enhanced ESD protection (±8 kV HBM) | Designed specifically for new automotive designs; supports same 40×4 drive capability and 1:4 multiplex mode | Select for new designs requiring long-term supply assurance and improved robustness; not drop-in due to revised command set and initialization sequence |
| PCF8576T/2 | Industrial-grade variant (non-AEC-Q100); identical electrical specs and pinout but rated only for −40 °C to +85 °C without automotive stress testing | Targeted at industrial HMIs and consumer appliances where automotive qualification is unnecessary | Use where AEC-Q100 is not mandated; lower cost and broader availability than S400 variant |
Compared with PCF8576DT/S400/2,1, PCA85176T/Q900/1 offers longer lifecycle support and higher ESD immunity for next-gen automotive systems, while PCF8576T/2 provides a cost-optimized industrial alternative without qualification overhead - both retain functional compatibility but require firmware validation due to command register differences.
Availability
PCF8576DT/S400/2,1 is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial control panels, and medical device displays requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PCF8576DT/S400/2,1 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, with leadership in interface, power management, and display technologies.
The PCF8576D product line was designed to simplify LCD integration in resource-constrained embedded systems by combining controller, driver, bias generation, and I²C interface into a single AEC-Q100-qualified IC - targeting automotive and industrial human-machine interfaces.
FAQ
What is the AEC-Q100 qualification status of PCF8576DT/S400/2,1?
PCF8576DT/S400/2,1 is explicitly qualified to AEC-Q100 Grade 3 (−40 °C to +85 °C ambient), as stated in Section 2 of the NXP datasheet Rev. 15.1. This qualification covers stress tests including HTOL, TC, UHAST, and ESD (HBM ±2 kV), making it suitable for automotive instrument clusters and body control modules where reliability under thermal cycling is mandatory. The "S400" suffix denotes this automotive qualification tier.
Can PCF8576DT/S400/2,1 drive a 14-segment alphanumeric display?
Yes, PCF8576DT/S400/2,1 can drive up to 10 independent 14-segment alphanumeric characters (14 segments × 10 = 140 elements), well within its 160-element maximum capacity. Each character maps to specific RAM rows/columns per drive mode; for 1:4 multiplexing, all four backplanes are used, and the 40×4-bit RAM allocates 4 bits per segment group. NXP's datasheet Table 4 confirms support for 14-segment displays with dot and accent.
What are the key differences between PCF8576DT/S400/2,1 and PCF8576T/2?
PCF8576DT/S400/2,1 is AEC-Q100 qualified for automotive use, while PCF8576T/2 is an industrial-grade variant without automotive qualification. Both share identical pinout, electrical specs, and TSSOP56 packaging, but PCF8576T/2 lacks the extended reliability testing (e.g., biased HTRB, package mold compound validation) required for automotive deployment. Use PCF8576T/2 only in non-automotive applications where qualification is not mandated.
How does the PCF8576DT/S400/2,1 handle display RAM addressing in 1:4 multiplex mode?
In 1:4 multiplex mode, the PCF8576DT/S400/2,1 writes each 8-bit data byte as two 4-bit words across four RAM rows (BP0–BP3), advancing the data pointer by 2 addresses per byte. For example, writing "0x3F" fills BP0/S0–S3 and BP1/S0–S3 simultaneously. This ensures time-multiplexed segment activation aligned with backplane waveforms, as defined in Figure 13 and Section 6.10.1 of the datasheet.
Is PCF8576DT/S400/2,1 still recommended for new designs?
No - NXP explicitly states in Section 1 and Table 1 that PCF8576DT/S400/2 (and thus PCF8576DT/S400/2,1) "should not be used for new design-ins." The designated replacement is PCA85176T/Q900/1 for automotive applications. While PCF8576DT/S400/2,1 remains available for legacy support and existing production, new designs should migrate to the successor part for assured long-term supply and enhanced features.
PCF8576DT/S400/2,1 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:
- 8 µA
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TSSOP
PCF8576DT/S400/2,1 FAQ
1.How can I place an order for PCF8576DT/S400/2,1 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCF8576DT/S400/2,1 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 PCF8576DT/S400/2,1 reliable?
The price and inventory of PCF8576DT/S400/2,1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCF8576DT/S400/2,1 is usually 5 days.
3.What payment methods are accepted for PCF8576DT/S400/2,1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCF8576DT/S400/2,1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCF8576DT/S400/2,1?
PCF8576DT/S400/2,1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCF8576DT/S400/2,1 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 PCF8576DT/S400/2,1?
For technical support, including PCF8576DT/S400/2,1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCF8576DT/S400/2,1 requirements.
6.How does Aetrix verify that PCF8576DT/S400/2,1 is sourced from the original manufacturer or authorized distributors?
All PCF8576DT/S400/2,1 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 PCF8576DT/S400/2,1 meets industry standards.
7.What is the process for return or replacement of PCF8576DT/S400/2,1?
All PCF8576DT/S400/2,1 units undergo pre-shipment inspection (PSI). If there is an issue with PCF8576DT/S400/2,1, 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 PCF8576DT/S400/2,1 part is unused and in its original packaging.
Return procedure for PCF8576DT/S400/2,1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCF8576DT/S400/2,1 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
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BU9796AMUV-E2
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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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