25LC256T-I/MF Equivalent & Substitute Parts

Part Overview

The 25LC256T-I/MF is a 256Kbit EEPROM memory IC manufactured by Microchip Technology, featuring SPI interface operation at 10 MHz with 8-DFN surface mount packaging. This non-volatile memory device operates across a 2.5V to 5.5V supply voltage range and supports industrial temperature specifications from -40°C to 85°C. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when electrical parameters, memory specifications, and physical packaging remain functionally equivalent while accommodating different packaging formats or supply voltage ranges.

Key Parameters

Parameter	Specification
Memory Size	256Kbit
Memory Organization	32K x 8
Memory Interface	SPI
Clock Frequency	10 MHz
Write Cycle Time	5ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-VDFN Exposed Pad
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 25LC256T-I/MF is determined by strict equivalence across core electrical and memory specifications. All identified substitutes maintain identical memory capacity (256Kbit), organization (32K x 8), interface protocol (SPI), clock frequency (10 MHz), write cycle timing (5ms), operating temperature range (-40°C to 85°C), physical package geometry (8-VDFN Exposed Pad), and compliance certifications (ROHS3, REACH Unaffected, EAR99).

Substitutes are differentiated by packaging format (Tape & Reel versus Tube) and supply voltage operating range. The 25LC256-I/MF operates within the identical 2.5V to 5.5V specification. The 25AA256T-I/MF extends the lower voltage boundary to 1.8V, providing broader supply voltage compatibility while maintaining all other electrical and physical parameters.

Parameter Comparison

Parameter	25LC256T-I/MF	25LC256-I/MF	25AA256T-I/MF
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology
Memory Size	256Kbit	256Kbit	256Kbit
Memory Organization	32K x 8	32K x 8	32K x 8
Memory Interface	SPI	SPI	SPI
Clock Frequency	10 MHz	10 MHz	10 MHz
Write Cycle Time	5ms	5ms	5ms
Voltage Supply Range	2.5V ~ 5.5V	2.5V ~ 5.5V	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-VDFN Exposed Pad	8-VDFN Exposed Pad	8-VDFN Exposed Pad
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Packaging Format	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All three parts maintain active production status with identical ROHS3 compliance and REACH unaffected certifications. Selection between 25LC256T-I/MF and 25LC256-I/MF is determined by packaging requirements: Tape & Reel format versus Tube format. Both operate within the 2.5V to 5.5V supply voltage specification.

The 25AA256T-I/MF is selected when system design requires operation at supply voltages below 2.5V, as it extends the minimum operating voltage to 1.8V. This part is manufacturer-recommended and carries verified programmability status. All three parts are functionally interchangeable at supply voltages within the 2.5V to 5.5V range, with packaging format and extended low-voltage capability as the primary differentiation factors.

Frequently Asked Questions (FAQ)

Q: Can 25LC256-I/MF replace 25LC256T-I/MF in production applications?

A: Yes. Both parts are electrically and functionally identical across all memory specifications, interface protocols, timing parameters, and operating conditions. The difference is packaging format: 25LC256T-I/MF is supplied in Tape & Reel format while 25LC256-I/MF is supplied in Tube format. Selection depends on assembly line requirements and component handling procedures.

Q: What is the primary advantage of 25AA256T-I/MF over the other substitutes?

A: The 25AA256T-I/MF extends the minimum supply voltage specification to 1.8V, compared to 2.5V for the other variants. This enables operation in low-power applications and systems with reduced supply voltage margins. All other electrical and physical parameters remain identical.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use identical 8-VDFN Exposed Pad packaging with the same physical dimensions (6x5mm) and pin configuration. Direct PCB layout compatibility is maintained across all substitutes.

Q: Do packaging format differences affect electrical performance?

A: No. Tape & Reel and Tube packaging formats are logistics and assembly handling variations only. Electrical performance, memory specifications, and operating characteristics are identical between 25LC256T-I/MF and 25LC256-I/MF.

Q: Which part should be selected for new designs?

A: For applications operating at 2.5V or higher, either 25LC256T-I/MF or 25LC256-I/MF is appropriate based on packaging requirements. For designs requiring operation below 2.5V supply voltage, 25AA256T-I/MF is the specified selection. All three parts carry active production status and full compliance certifications.

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