AT27C010L-45PI Equivalent & Substitute Parts

Part Overview

The AT27C010L-45PI is a 1Mbit parallel EPROM (Erasable Programmable Read-Only Memory) manufactured by Microchip Technology in a 32-DIP package with 45 ns access time. This part is classified as obsolete, making substitute components necessary for new designs and ongoing production support. The AT27C010L-45PI operates within the 4.5V to 5.5V supply voltage range and supports industrial temperature specifications from -40°C to 85°C.

Substiute Parts

AT27C010L-45PI

Microchip TechnologyIn Stock: 1061AT27C010L-45PI Datasheet

Current PartRFQ

AT27C010-70PU

Microchip TechnologyIn Stock: 3795AT27C010-70PU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT27C010L-45PI is determined by the following critical parameters that must remain constant:

• Memory capacity: 1Mbit
• Memory organization: 128K x 8
• Memory interface: Parallel
• Package type: 32-DIP (0.600", 15.24mm)
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature range: -40°C ~ 85°C
• Mounting type: Through Hole

The AT27C010-70PU qualifies as a direct substitute because it maintains identical specifications across all these critical parameters. The primary difference is access time (70 ns versus 45 ns) and product status (Active versus Obsolete), which does not prevent functional substitution in applications where the slower access time is acceptable.

Parameter Comparison

Engineering Selection Recommendations

The AT27C010-70PU is the qualified substitute for the AT27C010L-45PI based on the following factors:

• Both parts share identical memory capacity, organization, and interface specifications
• Both maintain the same 32-DIP package footprint and through-hole mounting configuration
• Both operate within identical voltage and temperature ranges
• The AT27C010-70PU carries Active product status, ensuring continued availability and support
• The AT27C010-70PU achieves ROHS3 compliance, whereas the original part is RoHS non-compliant

The access time difference (70 ns versus 45 ns) represents the only functional variance. Selection of the substitute should be based on system timing requirements and whether the slower access time is compatible with the application's read cycle specifications.

Frequently Asked Questions (FAQ)

Q: Can the AT27C010-70PU directly replace the AT27C010L-45PI in existing designs?

A: Yes, provided the system timing specifications accommodate the 70 ns access time. The substitute maintains identical memory capacity, organization, voltage requirements, temperature range, and 32-DIP package configuration. Pin-for-pin compatibility is maintained.

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

A: The AT27C010-70PU has a 70 ns access time compared to the 45 ns access time of the AT27C010L-45PI. The substitute also carries Active product status and ROHS3 compliance, whereas the original part is Obsolete and RoHS non-compliant.

Q: Are there any package or mounting differences?

A: No. Both parts use the 32-DIP (0.600", 15.24mm) package with through-hole mounting. PCB layout and socket compatibility remain unchanged.

Q: Does the substitute meet RoHS requirements?

A: The AT27C010-70PU is ROHS3 compliant. The original AT27C010L-45PI is RoHS non-compliant. This may be a consideration for applications subject to RoHS regulations.

Q: What supply voltage do these parts require?

A: Both parts operate within the 4.5V to 5.5V supply voltage range. No voltage adjustment is required when substituting.

Q: Are both parts suitable for industrial temperature applications?

A: Yes. Both parts support the -40°C to 85°C operating temperature range, meeting industrial specifications.