AT28C256F-15TU EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The AT28C256F-15TU is a 256Kbit parallel EEPROM memory IC manufactured by Microchip Technology, featuring 150 ns access time and 32K x 8 memory organization. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. The part operates within a 4.5V to 5.5V supply voltage range and supports industrial temperature specifications from -40°C to 85°C.

Substiute Parts

AT28C256F-15TU

Microchip TechnologyIn Stock: 1865AT28C256F-15TU Datasheet

Current PartRFQ

AT28C256F-15SU

Microchip TechnologyIn Stock: 1326AT28C256F-15SU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT28C256F-15TU is determined by strict equivalence across the following critical parameters:

• Memory capacity: 256Kbit
• Memory organization: 32K x 8 bit configuration
• Interface type: Parallel access
• Access time: 150 ns maximum
• Write cycle time: 3ms
• Supply voltage: 4.5V to 5.5V
• Temperature range: -40°C to 85°C
• Technology: EEPROM non-volatile memory
• Mounting: Surface mount configuration

The primary substitute identified is the AT28C256F-15SU, which maintains identical electrical specifications and memory architecture while differing only in package form factor and product status classification.

Parameter Comparison

Engineering Selection Recommendations

The AT28C256F-15SU is the direct electrical equivalent to the AT28C256F-15TU. Both parts maintain identical memory specifications, electrical performance, and compliance certifications. The substitute part holds active product status with Microchip Technology, ensuring continued availability and manufacturing support.

Selection between these parts is determined by package compatibility requirements. The AT28C256F-15TU uses a 28-TSSOP package (11.80mm width), while the AT28C256F-15SU uses a 28-SOIC package (7.50mm width). Both packages are surface mount configurations with identical pin counts and electrical pinouts. PCB layout modifications are required when transitioning between these package types due to different footprint dimensions.

Both parts maintain ROHS3 compliance and identical moisture sensitivity specifications, supporting equivalent handling and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can AT28C256F-15SU directly replace AT28C256F-15TU without circuit modifications?

A: Electrical substitution is direct. Pin configuration and electrical specifications are identical. PCB footprint modification is required due to package form factor differences (28-TSSOP versus 28-SOIC).

Q: What is the primary difference between these substitute parts?

A: The parts are electrically identical. The AT28C256F-15SU differs in package type (28-SOIC versus 28-TSSOP) and product status (Active versus Obsolete). The 28-SOIC package is narrower (7.50mm versus 11.80mm width).

Q: Are there compliance or certification differences between the parts?

A: Both parts maintain identical RoHS3 compliance, REACH status, and moisture sensitivity specifications. No compliance differences exist.

Q: What memory capacity and organization do these parts support?

A: Both parts provide 256Kbit capacity organized as 32K x 8 bits with parallel interface access.

Q: What are the electrical performance specifications?

A: Both parts operate at 4.5V to 5.5V supply voltage with 150 ns access time, 3ms write cycle time, and -40°C to 85°C operating temperature range.