PCF8594C-2P/02,112 Equivalent & Substitute Parts

Part Overview

The PCF8594C-2P/02,112 is a 4Kbit EEPROM memory IC manufactured by NXP USA Inc., designed for I2C serial communication at 100 kHz. This component operates across a supply voltage range of 2.5V to 6.0V and supports industrial temperature ranges from -40°C to 85°C. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

PCF8594C-2P/02,112

NXP USA Inc.In Stock: 731PCF8594C-2P/02,112 Datasheet

Current PartRFQ

24LC04B-I/P

Microchip TechnologyIn Stock: 241624LC04B-I/P Datasheet

MFR RecommendedRFQ

24LC04B/P

Microchip TechnologyIn Stock: 897224LC04B/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PCF8594C-2P/02,112 are qualified based on the following critical parameters:

• Memory Capacity: 4Kbit (matching the original specification)
• Memory Interface: I2C serial protocol (required for system compatibility)
• Package Type: 8-DIP through-hole form factor (mechanical and electrical compatibility)
• Supply Voltage Range: Overlap with original 2.5V ~ 6.0V specification
• Operating Temperature: Support for industrial range (-40°C ~ 85°C minimum)
• RoHS Compliance: ROHS3 Compliant status maintained

The substitute parts identified—24LC04B-I/P and 24LC04B/P from Microchip Technology—meet these core substitution criteria. Both parts maintain 4Kbit capacity, I2C interface, 8-DIP packaging, and RoHS3 compliance. The 24LC04B series operates at higher I2C clock frequencies (400 kHz) and includes enhanced access time specifications, providing functional equivalence with improved performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both 24LC04B-I/P and 24LC04B/P qualify as functional substitutes for the obsolete PCF8594C-2P/02,112 based on core electrical and mechanical compatibility. Selection between the two Microchip alternatives depends on operating temperature requirements:

24LC04B-I/P maintains the full industrial temperature range (-40°C ~ 85°C), matching the original part's thermal specification. This variant is appropriate for applications requiring extended temperature operation across the complete industrial spectrum.

24LC04B/P operates within a commercial temperature range (0°C ~ 70°C), which is narrower than the original specification. This variant is suitable for applications operating within standard commercial environmental conditions.

Both parts are active products with verified programmability status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. The higher I2C clock frequency (400 kHz) of both substitutes provides improved communication performance compared to the original 100 kHz specification, while maintaining full backward compatibility with systems designed for the PCF8594C-2P/02,112.

Frequently Asked Questions (FAQ)

Q: Can the 24LC04B series directly replace the PCF8594C-2P/02,112 in existing designs?

A: Yes. Both 24LC04B-I/P and 24LC04B/P are pin-compatible through-hole 8-DIP packages with identical mechanical footprints. The I2C interface, 4Kbit capacity, and supply voltage overlap ensure functional equivalence. The higher clock frequency of the substitutes does not create compatibility issues with systems designed for 100 kHz operation.

Q: What is the key difference between 24LC04B-I/P and 24LC04B/P?

A: The primary difference is operating temperature range. The 24LC04B-I/P supports -40°C ~ 85°C (industrial range), while the 24LC04B/P operates within 0°C ~ 70°C (commercial range). For applications requiring full industrial temperature operation, 24LC04B-I/P is the appropriate selection.

Q: Are there any supply voltage compatibility concerns?

A: The substitute parts operate at 2.5V ~ 5.5V, which overlaps with the original specification of 2.5V ~ 6.0V. Systems operating at voltages above 5.5V would require verification of actual operating conditions. Most standard 5V systems are fully compatible.

Q: Do the substitute parts maintain RoHS compliance?

A: Yes. Both 24LC04B-I/P and 24LC04B/P are ROHS3 compliant, matching the regulatory status of the original PCF8594C-2P/02,112.

Q: What is the significance of the higher 400 kHz clock frequency in the substitutes?

A: The 400 kHz I2C clock frequency in the 24LC04B series provides faster data transfer compared to the original 100 kHz specification. This is a performance enhancement that maintains full backward compatibility with existing system designs and firmware.