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

Part Overview

The PCF8594C-2T/02,112 is a 4Kbit EEPROM memory IC with I2C interface operating at 100 kHz, manufactured by NXP Semiconductors in 8-SOIC surface mount packaging. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain functional compatibility through matching memory capacity, I2C interface protocol, and physical package dimensions while accommodating operational parameter variations.

Substiute Parts

PCF8594C-2T/02,112

NXP SemiconductorsIn Stock: 1060PCF8594C-2T/02,112 Datasheet

Current PartRFQ

24LC04B-I/SN

Microchip TechnologyIn Stock: 458324LC04B-I/SN Datasheet

MFR RecommendedRFQ

24LC04B/SN

Microchip TechnologyIn Stock: 3344224LC04B/SN Datasheet

MFR RecommendedRFQ

24LC04BT-I/SN

Microchip TechnologyIn Stock: 485024LC04BT-I/SN Datasheet

MFR RecommendedRFQ

24LC04BT/SN

Microchip TechnologyIn Stock: 4642424LC04BT/SN Datasheet

MFR RecommendedRFQ

AT24C04C-SSPD-T

Microchip TechnologyIn Stock: 3842AT24C04C-SSPD-T Datasheet

MFR RecommendedRFQ

BR24G04FJ-3AGTE2

Rohm SemiconductorIn Stock: 826BR24G04FJ-3AGTE2 Datasheet

MFR RecommendedRFQ

FT24C04A-USR-B

Fremont Micro Devices LtdIn Stock: 887FT24C04A-USR-B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following mandatory parameters:

• Memory capacity: 4Kbit (non-negotiable)
• Interface protocol: I2C (non-negotiable)
• Package type: 8-SOIC physical form factor (non-negotiable)
• Supply voltage range: Must encompass or overlap with 2.5V ~ 6.0V
• Operating temperature range: Must support -40°C ~ 85°C minimum
• RoHS compliance: ROHS3 Compliant

Substitute parts are grouped into two categories based on clock frequency capability:

Category A (400 kHz I2C): Microchip 24LC04B series variants with enhanced I2C speed while maintaining backward compatibility with 100 kHz operation.

Category B (1 MHz I2C): Higher-speed alternatives from Microchip (AT24C04C), Rohm Semiconductor (BR24G04FJ), and Fremont Micro Devices (FT24C04A) offering extended frequency capability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Microchip 24LC04B Series):

24LC04B-I/SN, 24LC04BT-I/SN, and FT24C04A-USR-B are recommended as primary substitutes. These parts maintain full operational compatibility with the original PCF8594C-2T/02,112 across the required temperature range (-40°C ~ 85°C) and supply voltage specifications. All three are active products with ROHS3 compliance and verified programmability status where applicable.

24LC04B/SN and 24LC04BT/SN operate within a reduced temperature range (0°C ~ 70°C) and are suitable only for applications not requiring full -40°C ~ 85°C operation.

Secondary Substitute (Microchip AT24C04C-SSPD-T):

AT24C04C-SSPD-T extends operating temperature to -40°C ~ 125°C and includes AEC-Q100 automotive qualification. This part is suitable for applications requiring extended temperature performance or automotive-grade reliability. Programmability verification status is not confirmed.

Extended Frequency Alternatives (Rohm BR24G04FJ-3AGTE2, Fremont FT24C04A-USR-B):

BR24G04FJ-3AGTE2 and FT24C04A-USR-B support 1 MHz I2C operation, providing enhanced communication speed while maintaining backward compatibility with 100 kHz systems. BR24G04FJ-3AGTE2 operates at 1.6V minimum supply voltage. FT24C04A-USR-B operates at 1.8V minimum supply voltage. Both support the full -40°C ~ 85°C temperature range. Programmability verification status is not confirmed for either part.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher clock frequency (400 kHz or 1 MHz) in place of the 100 kHz PCF8594C-2T/02,112?

A: Yes. I2C protocol supports backward compatibility. A 400 kHz or 1 MHz capable device operates at lower frequencies when the system clock is limited to 100 kHz. No functional degradation occurs.

Q: What is the difference between 24LC04B-I/SN and 24LC04BT-I/SN?

A: Both support 400 kHz I2C operation and 4Kbit capacity. 24LC04B-I/SN operates at -40°C ~ 85°C with MSL 1. 24LC04BT-I/SN also operates at -40°C ~ 85°C but has MSL 3 (168 Hours moisture sensitivity). Select based on storage and assembly environment requirements.

Q: Why does 24LC04B/SN have a reduced temperature range (0°C ~ 70°C)?

A: This variant is specified for commercial temperature operation only. Use 24LC04B-I/SN or 24LC04BT-I/SN for applications requiring -40°C ~ 85°C industrial temperature range.

Q: Is AT24C04C-SSPD-T compatible with my 100 kHz I2C system?

A: Yes. AT24C04C-SSPD-T supports 400 kHz I2C operation and operates at lower frequencies when system clock is limited to 100 kHz. The extended temperature range (-40°C ~ 125°C) provides additional margin for harsh environments.

Q: What does AEC-Q100 qualification mean for AT24C04C-SSPD-T?

A: AEC-Q100 is an automotive industry qualification standard. AT24C04C-SSPD-T meets automotive reliability and testing requirements, making it suitable for automotive applications requiring enhanced quality assurance.

Q: Can I use BR24G04FJ-3AGTE2 or FT24C04A-USR-B in a 2.5V system?

A: BR24G04FJ-3AGTE2 operates at 1.6V minimum, supporting 2.5V systems. FT24C04A-USR-B operates at 1.8V minimum, also supporting 2.5V systems. Both are compatible with the original 2.5V ~ 6.0V supply range.

Q: Are all substitute parts available in the same packaging?

A: Yes. All substitute parts use 8-SOIC (0.154", 3.90mm Width) surface mount packaging, matching the original PCF8594C-2T/02,112 physical form factor for direct board-level replacement.