AT40K40-2BGI Equivalent & Substitute Parts

Part Overview

The AT40K40-2BGI is a Field Programmable Gate Array (FPGA) from Microchip Technology's AT40K/KLV series, featuring 2304 logic elements, 18432 bits of RAM, and 289 I/O pins in a 352-LBGA package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design considerations. The AT40K40-2BGI operates at 4.5V to 5.5V supply voltage with a 50,000 gate capacity and is rated for industrial temperature ranges (-40°C to 85°C).

Substiute Parts

AT40K40-2BGI

Microchip TechnologyIn Stock: 1128AT40K40-2BGI Datasheet

Current PartRFQ

AT40K40AL-1BQU

Microchip TechnologyIn Stock: 1028AT40K40AL-1BQU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT40K40-2BGI is constrained by core functional parameters that must remain consistent across equivalent designs. The critical parameters determining substitutability are:

Core Logic Parameters (Must Match):

• Number of Logic Elements/Cells: 2304
• Total RAM Bits: 18432
• Number of Gates: 50000
• Base Product Number: AT40K40

Allowable Variations:

• Number of I/O: May differ based on package selection and application requirements
• Package / Case: Different package options available within the same logic family
• Voltage - Supply: Different voltage ratings available (3V ~ 3.6V or 4.5V ~ 5.5V)
• Operating Temperature: Different temperature grades available
• Product Status: Active alternatives preferred over obsolete status
• RoHS Compliance: Newer variants may include RoHS3 compliance

The AT40K40AL-1BQU maintains identical logic element count, RAM capacity, and gate count while offering a different I/O configuration (114 vs. 289), alternative packaging (144-LQFP vs. 352-LBGA), and updated electrical specifications suitable for modern applications.

Parameter Comparison

Engineering Selection Recommendations

AT40K40AL-1BQU Substitution Criteria:

The AT40K40AL-1BQU is a functionally equivalent substitute when the following conditions are met:

1. Logic Capacity Match: Both parts contain identical 2304 logic elements, 18432 RAM bits, and 50,000 gate count, ensuring equivalent computational capability.

2. I/O Pin Reduction Acceptable: The substitute provides 114 I/O pins versus 289 on the main part. Substitution is valid only when system design requires 114 or fewer I/O connections.

3. Voltage Supply Compatibility: The substitute operates at 3V to 3.6V versus the main part's 4.5V to 5.5V. System power architecture must support the lower voltage range.

4. Temperature Range Consideration: The substitute operates 0°C to 70°C versus -40°C to 85°C on the main part. Substitution is valid only when operating environment remains within 0°C to 70°C.

5. Package Footprint Change: The 144-LQFP (20x20mm) package differs significantly from 352-LBGA (35x35mm). PCB layout redesign is required.

6. Compliance Advantage: The AT40K40AL-1BQU is active product status with ROHS3 compliance, addressing obsolescence and regulatory requirements of the main part.

Frequently Asked Questions (FAQ)

Q: Can the AT40K40AL-1BQU directly replace the AT40K40-2BGI without design changes?

A: Direct replacement is not possible. The substitute differs in I/O count (114 vs. 289), package type (144-LQFP vs. 352-LBGA), voltage supply (3V-3.6V vs. 4.5V-5.5V), and operating temperature range (0°C-70°C vs. -40°C-85°C). System design must accommodate these differences.

Q: What is the primary reason to consider the AT40K40AL-1BQU as a substitute?

A: The AT40K40-2BGI is obsolete. The AT40K40AL-1BQU maintains identical core logic capacity (2304 elements, 18432 RAM bits, 50,000 gates) while offering active product status and ROHS3 compliance for new designs or system updates.

Q: Are the logic elements and RAM capacity truly identical between these parts?

A: Yes. Both parts contain 2304 logic elements and 18432 total RAM bits, confirming equivalent computational and storage capacity.

Q: What design constraints must be evaluated before substitution?

A: Evaluate I/O pin requirements (114 available vs. 289 required), supply voltage capability (3V-3.6V vs. 4.5V-5.5V), operating temperature range (0°C-70°C vs. -40°C-85°C), and PCB layout feasibility for the smaller 144-LQFP package.

Q: Is the AT40K40AL-1BQU suitable for industrial temperature applications?

A: The AT40K40AL-1BQU operates 0°C to 70°C, which is narrower than the main part's -40°C to 85°C industrial range. It is suitable only for applications within the 0°C to 70°C window.

Q: What is the significance of the different package types?

A: The 352-LBGA (35x35mm) is a ball grid array with 289 I/O connections. The 144-LQFP (20x20mm) is a quad flat pack with 114 I/O connections. Package selection directly impacts PCB routing, board size, and I/O availability.