ICE40LP640-CM49 Equivalent & Substitute Parts

Part Overview

The ICE40LP640-CM49 is an iCE40™ LP Field Programmable Gate Array (FPGA) from Lattice Semiconductor Corporation, featuring 640 logic elements, 32768 bits of embedded RAM, and 35 I/O pins in a 49-VFBGA package. This device is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and production continuity. The iCE40 LP series provides low-power programmable logic solutions suitable for embedded applications requiring configurable digital functionality.

Substiute Parts

ICE40LP640-CM49

Lattice Semiconductor CorporationIn Stock: 1176ICE40LP640-CM49 Datasheet

Current PartRFQ

ICE40LP1K-CM49

Lattice Semiconductor CorporationIn Stock: 1758ICE40LP1K-CM49 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ICE40LP640-CM49 is determined by the following critical parameters:

Package Compatibility: The 49-VFBGA (49-UCBGA 3x3) package is the primary mechanical constraint. Substitute parts must maintain identical package geometry and pin count to ensure PCB-level compatibility without redesign.

Electrical Interface: Supply voltage range (1.14V ~ 1.26V) and I/O count (35 pins) must remain constant across substitutes to preserve circuit functionality and signal integrity.

Series Alignment: All substitutes must belong to the iCE40™ LP product family to ensure design tool compatibility, programming methodology consistency, and firmware portability.

Logic Capacity: While the ICE40LP640-CM49 contains 640 logic elements and 32768 bits of RAM, substitute parts may offer equal or greater capacity without affecting compatibility, provided all other parameters remain within specification.

Parameter Comparison

Engineering Selection Recommendations

The ICE40LP1K-CM49 serves as a direct substitute for the ICE40LP640-CM49 based on identical package, pin count, voltage specification, and operating temperature range. The substitute part maintains active product status with Lattice Semiconductor Corporation, ensuring continued availability and technical support.

The ICE40LP1K-CM49 provides doubled logic capacity (1280 elements versus 640) and doubled embedded RAM (65536 bits versus 32768 bits) within the same physical footprint and electrical interface. This enhanced capacity does not introduce compatibility constraints and allows for design headroom in applications requiring additional programmable logic resources.

Both devices comply with REACH regulations and carry identical moisture sensitivity classifications. The substitute part is RoHS3 compliant, supporting modern manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can the ICE40LP1K-CM49 replace the ICE40LP640-CM49 without PCB modifications?

A: Yes. Both devices use the 49-VFBGA package with identical pin assignments, supply voltage requirements, and I/O specifications. No PCB redesign is required.

Q: What are the key differences between these two parts?

A: The ICE40LP1K-CM49 contains twice the logic elements (1280 versus 640) and twice the embedded RAM (65536 versus 32768 bits). All other electrical and mechanical parameters remain identical.

Q: Does the increased logic capacity affect power consumption or thermal characteristics?

A: Power consumption and thermal behavior depend on design implementation and utilization. The supply voltage range and operating temperature specifications remain unchanged.

Q: Is the ICE40LP640-CM49 still available for new designs?

A: The ICE40LP640-CM49 is classified as obsolete. The ICE40LP1K-CM49 is the recommended active alternative for new designs and production continuity.

Q: Are there any firmware or design tool compatibility issues when switching to the substitute part?

A: Both devices belong to the iCE40™ LP series and use compatible design tools and programming methodologies. Existing firmware may require recompilation to utilize the additional logic capacity of the substitute part.

Q: What is the moisture sensitivity level for both parts?

A: Both the ICE40LP640-CM49 and ICE40LP1K-CM49 carry MSL 3 classification with a 168-hour floor life requirement.