LC4064B-75TN48I Equivalent & Substitute Parts

Part Overview

The LC4064B-75TN48I is a Complex Programmable Logic Device (CPLD) from Lattice Semiconductor Corporation's ispMACH® 4000B series. This 64 macrocell device operates with a maximum propagation delay of 7.5 ns and is housed in a 48-pin LQFP package. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

LC4064B-75TN48I

Lattice Semiconductor CorporationIn Stock: 937LC4064B-75TN48I Datasheet

Current PartRFQ

LC4064V-75TN48C

Lattice Semiconductor CorporationIn Stock: 7803LC4064V-75TN48C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LC4064B-75TN48I is determined by the following critical parameters:

• Macrocell Count: 64 macrocells (functional equivalence requirement)
• I/O Pin Count: 32 I/O pins (package compatibility requirement)
• Propagation Delay: 7.5 ns maximum (timing performance requirement)
• Package Type: 48-LQFP / 48-TQFP (7x7) (physical and electrical interface requirement)
• Programmable Architecture: In System Programmable (functional requirement)

The LC4064V-75TN48C qualifies as a substitute based on matching all critical parameters. However, the voltage supply range differs between the main part and substitute, requiring design verification for applications with specific voltage constraints.

Parameter Comparison

Engineering Selection Recommendations

The LC4064V-75TN48C is the manufacturer-recommended substitute for the obsolete LC4064B-75TN48I. Both devices share identical macrocell count, I/O configuration, propagation delay, and package specifications.

Key considerations for selection:

• Voltage Supply Range: The LC4064V-75TN48C operates at 3V ~ 3.6V, compared to the main part's 2.3V ~ 2.7V range. Applications designed for the lower voltage range require circuit-level evaluation before substitution.
• Operating Temperature Range: The LC4064V-75TN48C supports 0°C ~ 90°C, narrower than the main part's -40°C ~ 105°C range. Applications requiring extended temperature operation must confirm compatibility.
• Product Status: The LC4064V-75TN48C is active and verified as programmable, ensuring ongoing availability and support.
• Compliance: The LC4064V-75TN48C is RoHS3 compliant, meeting current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the LC4064V-75TN48C directly replace the LC4064B-75TN48I in existing designs?

A: Physical and functional compatibility is confirmed based on matching macrocell count, I/O pin count, propagation delay, and package type. However, voltage supply range and operating temperature range differences require design verification before implementation.

Q: What is the primary difference between these two parts?

A: The main differences are voltage supply range (2.3V ~ 2.7V vs. 3V ~ 3.6V) and operating temperature range (-40°C ~ 105°C vs. 0°C ~ 90°C). Both devices provide identical logic capacity and timing performance.

Q: Are both parts housed in the same physical package?

A: Yes. Both the LC4064B-75TN48I and LC4064V-75TN48C use the 48-TQFP (7x7) package, ensuring identical PCB footprint and pin assignment.

Q: What does "In System Programmable" mean for these devices?

A: Both devices support in-system programming, allowing configuration updates without removal from the circuit board.

Q: Is the LC4064V-75TN48C suitable for applications requiring -40°C operation?

A: No. The LC4064V-75TN48C operates from 0°C minimum. Applications requiring -40°C operation must use alternative solutions.

Q: What is the Moisture Sensitivity Level (MSL) for both parts?

A: Both devices have MSL 3 with a 168-hour floor life, requiring controlled storage and handling conditions.