AT40K20-2BGC Equivalent & Substitute Parts

Part Overview

The AT40K20-2BGC is a Field Programmable Gate Array (FPGA) from Microchip Technology's AT40K/KLV series, featuring 1024 logic elements, 8192 RAM bits, and 289 I/O pins in a 352-LBGA package. This device is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations where legacy compatibility is not required.

Substiute Parts

AT40K20-2BGC

Microchip TechnologyIn Stock: 940AT40K20-2BGC Datasheet

Current PartRFQ

AT40K20AL-1BQU

Microchip TechnologyIn Stock: 885AT40K20AL-1BQU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AT40K20-2BGC are identified based on core functional equivalence within the AT40K family. The primary substitution criterion is matching logic element count (1024 cells), RAM capacity (8192 bits), and gate count (30000 gates), which define the computational capability of the device.

The AT40K20AL-1BQU qualifies as a manufacturer-recommended substitute because it maintains identical logic element density, RAM configuration, and gate count. However, this substitute operates under different electrical and packaging constraints:

• Logic Elements/Cells: 1024 (matched)
• Total RAM Bits: 8192 (matched)
• Number of Gates: 30000 (matched)
• I/O Pin Count: Reduced from 289 to 114
• Supply Voltage: Changed from 4.75V–5.25V to 3V–3.6V
• Package: Changed from 352-LBGA to 144-LQFP
• Product Status: Active (versus Obsolete)

Parameter Comparison

Engineering Selection Recommendations

Selection between the AT40K20-2BGC and AT40K20AL-1BQU depends on application-specific constraints:

The AT40K20AL-1BQU is the preferred choice for new designs and ongoing production due to its Active product status and ROHS3 compliance. This substitute maintains equivalent computational resources (logic elements, RAM, and gate count) and identical operating temperature range, enabling functional equivalence in applications where I/O pin count and supply voltage requirements can be accommodated.

The AT40K20-2BGC remains applicable only in legacy systems where the 289 I/O pin configuration and 5V supply voltage are mandatory design requirements. Its Obsolete status and RoHS non-compliance restrict its use to maintenance and repair of existing equipment.

Frequently Asked Questions (FAQ)

Q: Can the AT40K20AL-1BQU directly replace the AT40K20-2BGC in existing designs?

A: Functional replacement is possible if the application can accommodate reduced I/O pin count (114 versus 289) and lower supply voltage (3V–3.6V versus 4.75V–5.25V). The identical logic element count, RAM capacity, and gate count ensure computational equivalence. PCB redesign and power supply modification are required.

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

A: The AT40K20-2BGC uses 352-LBGA (35x35mm), a high-pin-count ball grid array suitable for applications requiring maximum I/O connectivity. The AT40K20AL-1BQU uses 144-LQFP (20x20mm), a lower-pin-count quad flat pack. Package selection depends on board space constraints and I/O requirements.

Q: Why does the substitute have fewer I/O pins?

A: The AT40K20AL-1BQU belongs to the AT40KAL series variant, which implements the same core logic architecture in a smaller package footprint. This design trade-off reduces I/O availability while maintaining computational capability.

Q: Is the AT40K20AL-1BQU suitable for new product development?

A: Yes. The Active product status and ROHS3 compliance make it appropriate for new designs. However, verify that the 114 I/O pins and 3V–3.6V supply voltage align with system requirements before committing to this substitute.

Q: What are the compliance differences between these parts?

A: The AT40K20-2BGC is RoHS non-compliant and REACH Unaffected. The AT40K20AL-1BQU is ROHS3 Compliant and REACH Unaffected. For applications subject to RoHS regulations, the substitute is mandatory.