AT27BV020-90JU Equivalent & Substitute Parts

Part Overview

The AT27BV020-90JU is a 2Mbit EPROM (Erasable Programmable Read-Only Memory) with parallel interface, manufactured by Microchip Technology. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and component procurement. The part operates with dual voltage supply ranges (2.7V–3.6V and 4.5–5.5V) and features a 90 ns access time in a 32-PLCC surface mount package.

Substiute Parts

AT27BV020-90JU

Microchip TechnologyIn Stock: 910AT27BV020-90JU Datasheet

Current PartRFQ

AT27LV020A-12JU

Microchip TechnologyIn Stock: 1361AT27LV020A-12JU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT27BV020-90JU is based on the following critical parameters that must remain constant or compatible:

• Memory Capacity & Organization: 2Mbit capacity with 256K x 8 organization
• Memory Type & Technology: EPROM (OTP) technology
• Interface Type: Parallel interface
• Package & Pinout: 32-PLCC (J-Lead) with identical physical dimensions (13.97×11.43 mm)
• Voltage Compatibility: Supply voltage ranges must overlap or be compatible with system design
• Temperature Range: Operating temperature must meet or exceed -40°C to 85°C
• Compliance: RoHS3 and REACH compliance maintained

The AT27LV020A-12JU qualifies as a substitute based on matching all critical parameters. The primary difference is access time (120 ns versus 90 ns), which represents a relaxation of timing requirements and does not prevent substitution in systems designed for the original part.

Parameter Comparison

Engineering Selection Recommendations

The AT27LV020A-12JU is the qualified substitute for the AT27BV020-90JU based on the following engineering criteria:

• Functional Equivalence: Both devices share identical memory capacity, organization, interface type, and package configuration
• Compliance Continuity: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment
• Product Availability: The substitute is active in production with confirmed inventory (1283 pcs), whereas the main part is obsolete
• Timing Compatibility: The 120 ns access time of the substitute is slower than the 90 ns specification of the main part. This substitution is valid only in applications where the system timing budget accommodates the longer access time
• Voltage Supply: The substitute supports the 4.5V–5.5V range fully. The 3V–3.6V range is narrower (3V minimum versus 2.7V minimum), which may require verification in low-voltage applications

Frequently Asked Questions (FAQ)

Q: Can the AT27LV020A-12JU directly replace the AT27BV020-90JU without circuit modifications?

A: Direct replacement is possible from a pinout and package perspective. However, the 30 ns increase in access time (from 90 ns to 120 ns) must be evaluated against system timing requirements. If the original design includes timing margin, substitution is valid. If the system operates at the edge of timing specifications, functional testing is required.

Q: What is the difference between the voltage supply ranges of these two parts?

A: The main part (AT27BV020-90JU) supports 2.7V–3.6V and 4.5V–5.5V. The substitute (AT27LV020A-12JU) supports 3V–3.6V and 4.5V–5.5V. The lower voltage range is narrower by 0.3V. Applications operating below 3V require the original part or alternative solutions.

Q: Why is the AT27BV020-90JU listed as obsolete?

A: Obsolescence reflects the manufacturer's discontinuation of this product line. The AT27LV020A-12JU represents the active equivalent within Microchip's current EPROM portfolio, ensuring long-term availability and supply chain continuity.

Q: Are there any packaging or moisture sensitivity differences?

A: Both parts use identical 32-PLCC (J-Lead) packaging with MSL 2 (1 Year) moisture sensitivity. Handling and storage requirements are equivalent.

Q: What compliance certifications apply to both parts?

A: Both the main part and substitute are ROHS3 compliant and REACH unaffected. No additional compliance verification is required for regulatory purposes.