PCF8579H/1,157 Equivalent & Substitute Parts

Part Overview

The PCF8579H/1,157 is a LCD dot matrix driver IC manufactured by NXP USA Inc., designed for driving dot matrix display configurations via I2C interface. This component operates across a 2.5V to 6V supply range with minimal current draw of 9 µA, making it suitable for low-power LCD applications. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and component procurement.

Substiute Parts

PCF8579H/1,157

NXP USA Inc.In Stock: 1094PCF8579H/1,157 Datasheet

Current PartRFQ

PCF8579HT/1

NXP USA Inc.In Stock: 10386PCF8579HT/1 Datasheet

DirectRFQ

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

Substitute parts for the PCF8579H/1,157 are identified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Display Type: LCD
• Configuration: Dot Matrix
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C ~ 85°C
• RoHS3 Compliance
• Product Status: Obsolete (indicating end-of-life components requiring alternatives)

Direct Substitutes (Same Base Product Family): The PCF8579HT/1 represents a direct substitute within the NXP PCF8579 product family, maintaining identical electrical specifications (9 µA supply current, 2.5V ~ 6V supply voltage) while differing only in package type (64-TQFP vs. 64-LQFP) and packaging format (Cut Tape & Digi-Reel vs. standard packaging).

Cross-Manufacturer Substitutes (onsemi LC75812 Series): The LC75812PTH-8565-H and LC75812PTS-8565-H from onsemi provide functional equivalence for dot matrix LCD driving applications. These parts operate within compatible temperature ranges (-40°C ~ 85°C) and maintain ROHS3 compliance. However, they differ in package configuration (100-TQFP vs. 64-LQFP/TQFP), interface protocol (Serial vs. I2C), and supply current specifications (500 µA vs. 9 µA), requiring design-level evaluation for integration.

Parameter Comparison

Engineering Selection Recommendations

PCF8579HT/1 (Direct Substitute): This part is the primary substitute for PCF8579H/1,157 applications. Both components share identical electrical specifications and base product architecture. The substitution requires only PCB layout adjustment to accommodate the 64-TQFP package footprint in place of the 64-LQFP footprint. Both parts maintain ROHS3 compliance and operate across the same temperature and voltage ranges. Inventory availability (10,300 pcs) supports production requirements.

LC75812PTH-8565-H and LC75812PTS-8565-H (Cross-Manufacturer Alternatives): These onsemi components provide functional dot matrix LCD driving capability within the same temperature operating range and ROHS3 compliance framework. However, integration requires design modifications: the 100-TQFP package is significantly larger (14x14 vs. 10x10), the Serial interface replaces I2C communication protocol, and supply current increases from 9 µA to 500 µA. These parts are suitable only for applications where interface protocol and power budget modifications are acceptable. The onsemi parts support extended character/digit configurations (16 Characters, 240 Characters, 12 Digits, 13 Digits) not specified for the PCF8579 series.

Frequently Asked Questions (FAQ)

Q: Can PCF8579HT/1 be used as a direct replacement for PCF8579H/1,157?

A: Yes. Both parts are from the NXP PCF8579 product family with identical electrical specifications (9 µA supply current, 2.5V ~ 6V supply voltage, I2C interface, -40°C ~ 85°C operating range). The only difference is the package type: 64-LQFP versus 64-TQFP. PCB layout modification is required to accommodate the different package footprint.

Q: What are the key differences between NXP PCF8579 and onsemi LC75812 series?

A: The primary differences are: (1) Interface protocol—PCF8579 uses I2C while LC75812 uses Serial interface; (2) Supply current—PCF8579 draws 9 µA versus 500 µA for LC75812; (3) Package size—PCF8579 is 64-pin (10x10) while LC75812 is 100-pin (14x14); (4) Supply voltage range—PCF8579 operates 2.5V ~ 6V while LC75812 operates 2.7V ~ 3.6V. These differences require design-level evaluation before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. PCF8579H/1,157, PCF8579HT/1, LC75812PTH-8565-H, and LC75812PTS-8565-H are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the impact of MSL (Moisture Sensitivity Level) differences?

A: PCF8579H/1,157 has MSL 1 (unlimited shelf life without moisture control), while PCF8579HT/1 and both LC75812 variants have MSL 3 (168-hour maximum exposure to 85°C/85% RH before reflow). This affects storage and handling procedures but does not impact functional performance after assembly.

Q: Can LC75812 parts be used in applications designed for PCF8579?

A: Integration of LC75812 parts requires design modifications. The Serial interface cannot directly replace I2C without firmware and hardware changes. The increased supply current (500 µA vs. 9 µA) affects power budget calculations. The narrower supply voltage range (2.7V ~ 3.6V vs. 2.5V ~ 6V) may restrict application flexibility. Package size increase (100-TQFP vs. 64-LQFP) requires PCB redesign. These substitutions are suitable only when design modifications are feasible.