AT27C020-15JC Equivalent & Substitute Parts

Part Overview

The AT27C020-15JC is a 2Mbit parallel EPROM (Erasable Programmable Read-Only Memory) manufactured by Microchip Technology in a 32-PLCC package. This part is classified as obsolete and operates with a 150 ns access time across a 0°C to 70°C temperature range. Due to its obsolete status and non-compliance with current RoHS standards, identifying functionally equivalent active alternatives is necessary for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EPROM
Memory Size	2Mbit
Memory Organization	256K x 8
Memory Interface	Parallel
Access Time	150 ns
Voltage Supply	4.5V ~ 5.5V
Package Type	32-PLCC (13.97x11.43)
Mounting Type	Surface Mount
Operating Temperature	0°C ~ 70°C
RoHS Status	Non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AT27C020-15JC is determined by the following critical parameters:

Memory Capacity & Organization: Must be 2Mbit with 256K x 8 organization
Memory Technology: Must be EPROM (OTP) non-volatile memory
Interface Type: Must support parallel interface
Package Compatibility: Must use 32-PLCC (13.97x11.43) surface mount package
Voltage Specification: Must operate within 4.5V ~ 5.5V supply range
Access Time: Must meet or exceed 150 ns performance requirement (faster access times are acceptable)

The AT27C020-90JU qualifies as a direct substitute based on these parameters. It maintains identical memory capacity, organization, technology, interface, and package specifications while offering improved access time performance (90 ns versus 150 ns).

Parameter Comparison

Parameter	AT27C020-15JC (Main Part)	AT27C020-90JU (Substitute)
Manufacturer	Microchip Technology	Microchip Technology
Memory Type	Non-Volatile EPROM	Non-Volatile EPROM
Memory Size	2Mbit	2Mbit
Memory Organization	256K x 8	256K x 8
Memory Interface	Parallel	Parallel
Access Time	150 ns	90 ns
Voltage Supply	4.5V ~ 5.5V	4.5V ~ 5.5V
Package Type	32-PLCC (13.97x11.43)	32-PLCC (13.97x11.43)
Mounting Type	Surface Mount	Surface Mount
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C
Product Status	Obsolete	Active
RoHS Status	Non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The AT27C020-90JU is the qualified substitute for the AT27C020-15JC based on the following factors:

Product Status: The AT27C020-15JC is obsolete, while the AT27C020-90JU maintains active product status with verified availability (2034 pcs in stock versus 1229 pcs for the obsolete part).

Compliance & Certifications: The AT27C020-90JU is ROHS3 compliant and carries verified programmability status through DiGi-Electronics, whereas the AT27C020-15JC is RoHS non-compliant and lacks verified programmability certification.

Performance Characteristics: The substitute part delivers superior access time performance (90 ns versus 150 ns), which is backward-compatible with designs specified for 150 ns operation. The extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C) provides additional operational flexibility.

Electrical & Mechanical Compatibility: Both parts share identical supply voltage specifications, memory capacity, organization, interface type, and physical package dimensions, ensuring direct pin-for-pin compatibility.

Frequently Asked Questions (FAQ)

Q: Can the AT27C020-90JU be used as a direct replacement for the AT27C020-15JC?

A: Yes. Both parts are manufactured by Microchip Technology with identical memory capacity (2Mbit), organization (256K x 8), parallel interface, and 32-PLCC package dimensions. The substitute operates at 90 ns access time, which exceeds the 150 ns specification of the original part.

Q: What is the difference in access time between these parts?

A: The AT27C020-15JC operates at 150 ns access time, while the AT27C020-90JU operates at 90 ns. Faster access time is a performance improvement and does not create compatibility issues in systems designed for the slower part.

Q: Are there package compatibility concerns?

A: No. Both parts use the identical 32-PLCC (13.97x11.43) surface mount package with the same pin configuration and physical dimensions.

Q: What is the significance of the RoHS compliance difference?

A: The AT27C020-15JC is RoHS non-compliant, while the AT27C020-90JU is ROHS3 compliant. For new designs and systems subject to RoHS regulations, the substitute part meets current environmental and material restriction requirements.

Q: Does the extended temperature range of the substitute part affect compatibility?

A: No. The AT27C020-90JU operates across -40°C ~ 85°C, which encompasses the original part's 0°C ~ 70°C range. This extended range provides additional operational margin without affecting compatibility.

Q: What is the supply voltage requirement for both parts?

A: Both the AT27C020-15JC and AT27C020-90JU require a 4.5V ~ 5.5V supply voltage. No power supply modifications are necessary when substituting between these parts.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message