AT40K40-2BGC Equivalent & Substitute Parts

Part Overview

The AT40K40-2BGC 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, redesigns, and procurement planning. The AT40K40-2BGC operates at 4.75V to 5.25V supply voltage with a maximum of 50000 gates and is rated for 0°C to 70°C operating temperature.

Substiute Parts

AT40K40-2BGC

Microchip TechnologyIn Stock: 1069AT40K40-2BGC Datasheet

Current PartRFQ

AT40K40AL-1BQU

Microchip TechnologyIn Stock: 1028AT40K40AL-1BQU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT40K40-2BGC is constrained by the following critical parameters that must remain consistent or compatible:

Core Logic Parameters (Must Match):

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

Electrical Parameters (Must Be Compatible):

• Supply voltage range must support the system design voltage
• Operating temperature range must meet application requirements

Physical Parameters (Application-Dependent):

• Package type and pin count determine PCB compatibility
• I/O pin count must be sufficient for the application

The identified substitute AT40K40AL-1BQU shares identical logic element count, RAM capacity, and gate count, confirming functional equivalence at the core FPGA level. However, this substitute differs in I/O pin count (114 vs. 289), supply voltage (3V ~ 3.6V vs. 4.75V ~ 5.25V), and package type (144-LQFP vs. 352-LBGA), making it suitable only for applications where these differences are acceptable.

Parameter Comparison

Engineering Selection Recommendations

AT40K40AL-1BQU Substitution Criteria:

The AT40K40AL-1BQU is functionally equivalent at the logic level (identical logic elements, RAM, and gate count) and maintains the same operating temperature range. This substitute is suitable when:

• The application requires only 114 I/O pins or fewer (versus the original 289)
• The system can operate at 3V to 3.6V supply voltage (versus the original 4.75V to 5.25V)
• PCB redesign to accommodate the 144-LQFP package is feasible
• RoHS3 compliance is required (the substitute is compliant; the original is not)

Limitations:

This substitute is not suitable for applications requiring the full 289 I/O pin count or 5V supply voltage operation without additional interface circuitry. The package change from 352-LBGA to 144-LQFP necessitates PCB layout redesign.

Frequently Asked Questions (FAQ)

Q: Can AT40K40AL-1BQU directly replace AT40K40-2BGC without PCB changes?

A: No. The substitute uses a different package (144-LQFP vs. 352-LBGA) and has fewer I/O pins (114 vs. 289). PCB redesign is required.

Q: Are the logic resources identical between these parts?

A: Yes. Both parts contain 2304 logic elements, 18432 RAM bits, and 50000 gates. The difference lies in I/O availability and packaging.

Q: What is the voltage compatibility concern?

A: The main part operates at 4.75V to 5.25V, while the substitute operates at 3V to 3.6V. System power supply redesign may be necessary.

Q: Why is the main part obsolete?

A: The AT40K40-2BGC is classified as obsolete by Microchip Technology. The AT40KAL series (including AT40K40AL-1BQU) represents the active product line continuation.

Q: Does the substitute meet modern compliance standards?

A: Yes. AT40K40AL-1BQU is RoHS3 compliant, whereas the original AT40K40-2BGC is RoHS non-compliant.

Q: What is the MSL rating, and why does it matter?

A: Both parts have MSL 3 (168 Hours), indicating they require controlled moisture exposure during storage and handling. Standard ESD and moisture control procedures apply to both.