PCF8578HT/1,518 Equivalent & Substitute Parts

Part Overview

The PCF8578HT/1,518 is an LCD driver integrated circuit manufactured by NXP Semiconductors, designed for dot matrix display applications in a 64-TQFP package. This component operates across a supply voltage range of 2.5V to 6V and supports I2C interface communication. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and component procurement planning.

Substiute Parts

PCF8578HT/1,518

NXP SemiconductorsIn Stock: 8181PCF8578HT/1,518 Datasheet

Current PartRFQ

PCF8531U/2DA/1,026

NXP USA Inc.In Stock: 1067PCF8531U/2DA/1,026 Datasheet

MFR RecommendedRFQ

LC75812PTH-8565-H

onsemiIn Stock: 1193LC75812PTH-8565-H Datasheet

MFR RecommendedRFQ

LC75812PTS-8565-H

onsemiIn Stock: 1734LC75812PTS-8565-H Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PCF8578HT/1,518 is determined by the following critical parameters:

Display Type & Configuration: All substitute parts must support LCD display technology with dot matrix configuration capability to maintain functional compatibility with existing display interfaces.

Interface Protocol: The primary substitute (PCF8531U/2DA/1,026) operates via I2C interface, matching the original part's communication protocol. Secondary substitutes (LC75812PTH-8565-H and LC75812PTS-8565-H) utilize serial interface, representing a different control architecture.

Voltage Supply Range: The original part operates at 2.5V ~ 6V. The PCF8531U/2DA/1,026 supports 1.8V ~ 5.5V (overlapping range with lower minimum), while LC75812 variants operate at 2.7V ~ 3.6V (narrower range within original specification).

Operating Temperature: All substitute parts maintain the -40°C ~ 85°C operating range, ensuring thermal compatibility.

Package Type: The original 64-TQFP (10x10) surface mount package differs from substitutes. PCF8531U/2DA/1,026 is supplied as a die, while LC75812 variants use 100-TQFP (14x14) packages, requiring board-level redesign considerations.

Compliance & Status: All parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements.

Parameter Comparison

Engineering Selection Recommendations

PCF8531U/2DA/1,026 (NXP USA Inc.): This part represents the closest functional match for I2C-based applications. It maintains active product status, ensuring long-term availability and manufacturing support. The die package format requires integration into a hybrid or custom module assembly, making it suitable for applications where package redesign is feasible. The lower supply current (90 µA) provides power efficiency advantages over the original specification.

LC75812PTH-8565-H and LC75812PTS-8565-H (onsemi): These parts support dot matrix LCD configurations with serial interface control. Both are classified as obsolete products. The 100-TQFP (14x14) package requires significant PCB layout modifications compared to the original 64-TQFP footprint. The narrower voltage supply range (2.7V ~ 3.6V) may impose constraints on systems designed for the original 2.5V ~ 6V specification. Higher supply current consumption (500 µA) should be evaluated against power budget requirements.

All substitute candidates maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory compliance requirements equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can PCF8531U/2DA/1,026 directly replace PCF8578HT/1,518 on existing PCBs?

A: Direct PCB replacement is not possible. PCF8531U/2DA/1,026 is supplied as a die, not a packaged component. This part requires custom hybrid assembly or module integration. The original 64-TQFP package cannot be substituted with a die form factor without board-level redesign.

Q: What is the primary difference between PCF8531U/2DA/1,026 and LC75812 variants?

A: PCF8531U/2DA/1,026 uses I2C interface communication, matching the original part's protocol. LC75812PTH-8565-H and LC75812PTS-8565-H use serial interface, requiring firmware and control logic modifications. Interface protocol differences necessitate software and hardware redesign for compatibility.

Q: Are LC75812 variants suitable for systems requiring 2.5V supply voltage?

A: No. LC75812 variants operate within 2.7V ~ 3.6V supply range. Systems designed for the original 2.5V ~ 6V specification cannot operate these parts at 2.5V. Voltage supply compatibility must be verified before selection.

Q: What are the packaging implications of using PCF8531U/2DA/1,026?

A: The die format requires integration into a custom module, hybrid assembly, or flip-chip configuration. This approach extends development timelines and increases manufacturing complexity compared to standard packaged components. Board-level redesign is mandatory.

Q: Do all substitute parts maintain the same operating temperature range?

A: Yes. All substitute parts operate across -40°C ~ 85°C, matching the original PCF8578HT/1,518 specification. Thermal performance is equivalent across all candidates.

Q: Which substitute part offers the best long-term availability?

A: PCF8531U/2DA/1,026 is classified as active product status, indicating ongoing manufacturing and supplier support. LC75812 variants are obsolete, similar to the original part, limiting long-term procurement reliability.