LC4032B-25T44C

Overview

The LC4032B-25T44C is a Complex Programmable Logic Device (CPLD) from the Lattice ispMACH 4000V/B/C/Z family. It features 32 macrocells and 36 logic blocks, housed in a 44-pin Thin Quad Flat Package (TQFP). The device supports In-System Programming (ISP) via JTAG and utilizes EEPROM technology for non-volatile configuration storage. Key electrical parameters include a maximum operating frequency of 250 MHz, a propagation delay of 7.5 ns, and an I/O count of 30 lines with 2 dedicated inputs. It operates within a commercial temperature range of 0°C to 90°C junction temperature.

Feature Summary

• High-performance CPLD architecture with 32 macrocells and up to 250 MHz operation
• In-System Programmability (ISP) via JTAG interface for flexible design updates
• EEPROM-based non-volatile memory allowing immediate power-up operation
• 5 V tolerant I/Os supporting LVCMOS 3.3, LVTTL, and PCI interfaces

Applications

• General-purpose digital logic replacement and glue logic integration
• Interface bridging between components with different voltage levels or protocols
• State machine implementation in industrial control systems
• Address decoding and bus arbitration in embedded computing architectures

Procurement Notes

Verify compliance requirements prior to procurement, as specific variants may not meet RoHS standards. Confirm the package type is TQFP-44 and check for leaded vs. lead-free terminal options. Ensure the supply chain source provides valid datasheets matching the LC4032B suffix for 2.5V core voltage operation. Validate that the component meets the required commercial temperature grade of 0°C to 90°C for the intended application environment.

Selection Notes

Select this model when 32 macrocells are sufficient for the design complexity. The -25 speed grade indicates a 7.5 ns propagation delay, suitable for moderate-speed applications requiring 250 MHz performance. Choose this part over higher-density devices like the LC4064B if pin count and cost are constrained. Ensure the design utilizes the available 30 user I/Os and 2 dedicated inputs effectively within the 44-pin footprint.

Part Context

This component belongs to the ispMACH 4000V/B/C/Z family, which blends ispLSI 2000 and ispMACH 4A architectures. The 'B' suffix denotes a 2.5V core voltage variant, distinct from the 3.3V (V) or 1.8V (C) cores. The family offers global routing pools for improved timing predictability and first-time-fit success rates compared to older generation PLDs.

Replacement Considerations

Direct functional replacements within the same density include other speed grades of the LC4032B series, such as LC4032B-75TN44C, provided timing constraints allow for slower performance. Cross-family migration to ispMACH 4000V or Z variants requires verification of core voltage compatibility and pinout retention.