LC4064B-75T44I

Complex Programmable Logic Devices Overview

The LC4064B-75T44I is a Complex Programmable Logic Device (CPLD) from the Lattice ispMACH 4000B family. It features 64 macrocells organized into 4 Logic Array Blocks (LABs) and provides 30 I/O pins in a 44-TQFP package. The device operates at a supply voltage of 2.5 V, with a range of 2.3 V to 2.7 V. Key electrical parameters include a maximum propagation delay of 7.5 ns and a maximum operating frequency of 400 MHz. It supports an industrial temperature range from -40°C to +105°C and draws approximately 12 mA of operating current.

Complex Programmable Logic Devices Feature Summary

• Contains 64 macrocells distributed across 4 Logic Array Blocks for flexible logic implementation.
• Offers 30 user-accessible I/O pins within a compact 44-pin TQFP surface-mount package.
• Supports System In-Programmability (ISP) via JTAG interface for field updates.
• Operates reliably within an extended industrial temperature range of -40°C to +105°C.

Complex Programmable Logic Devices Applications

• General-purpose digital logic replacement for legacy TTL/CMOS circuits.
• Address decoding and bus bridging in embedded systems.
• State machine implementation for control logic applications.
• Interface translation between different voltage domains or protocols.

Complex Programmable Logic Devices Procurement Notes

This component is designated as obsolete by the manufacturer. Availability is restricted to surplus or secondary market channels. Verification of lot date codes and storage history is critical due to potential moisture sensitivity issues. Ensure compatibility with existing PCB footprints and programming interfaces before procurement.

Complex Programmable Logic Devices Selection Notes

Select this model when 64 macrocells and 30 I/Os are sufficient for the design requirements. The 75 speed grade indicates a 7.5 ns maximum delay. Compare against the LC4064V series if higher density or different voltage options are needed. Verify that the 44-TQFP package fits the mechanical constraints of the target assembly.

Complex Programmable Logic Devices Part Context

The LC4064B belongs to the ispMACH 4000B family, which succeeded the original ispMACH 4000 series. This generation introduced improved performance and lower power consumption while maintaining pin-to-pin compatibility with earlier devices in some configurations. It represents a mature technology node used for cost-sensitive logic integration.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-compatible replacements may be limited due to obsolescence. Check for LC4064B variants with different suffixes (e.g., TN44I vs T44I) which may indicate package or temperature differences. Consider migration to newer Lattice families like MachXO2 or CrossLink if new production is required.