CY37256VP256-66BBI

Complex Programmable Logic Devices Overview

The CY37256VP256-66BBI is a Complex Programmable Logic Device (CPLD) from the Ultra37000 family, manufactured by Infineon Technologies. It features 256 macrocells and supports up to 197 I/O pins in a 256-lead FBGA package. Operating at a supply voltage of 3.3V, it delivers a maximum propagation delay of 20 ns and a maximum frequency of 100 MHz. The device utilizes In-System Reprogrammable (ISR) CMOS technology with EEPROM storage, enabling design changes without pinout or timing alterations via a JTAG interface.

Complex Programmable Logic Devices Feature Summary

• In-System Reprogrammable (ISR) architecture allowing design updates without board respins
• Simple timing model with no fanout, expander, or routing delays affecting performance
• Intelligent product term allocator providing flexible distribution of up to 16 terms per macrocell
• PCI Local Bus specification compliant for high-speed digital applications

Complex Programmable Logic Devices Applications

• High-density logic replacement in industrial control systems
• Interface bridging between different voltage domains (3.3V/5V tolerant)
• Complex state machine implementation in telecommunications equipment

Complex Programmable Logic Devices Procurement Notes

Verify component authenticity through authorized distributors as this part may be subject to obsolescence. Confirm that the specific speed bin (66 MHz) matches system requirements. Ensure ESD protection protocols are followed during handling due to moisture sensitivity. Check for RoHS compliance status if required for current manufacturing standards.

Complex Programmable Logic Devices Selection Notes

Select this model when 256 macrocells and 197 I/Os are required in a compact BGA footprint. Choose the V suffix variant specifically for 3.3V core operation. Ensure the development environment supports Warp software or compatible third-party EDA tools for synthesis and fitting. Verify that the 20 ns delay meets the critical path constraints of the target application.

Complex Programmable Logic Devices Part Context

This component belongs to the Ultra37000 CPLD family, which bridges the gap between simple PLDs and high-end FPGAs. The family offers consistent pinouts across densities to simplify migration. Manufactured originally by Cypress Semiconductor, the portfolio was integrated into Infineon Technologies following corporate acquisitions, maintaining the ISR capability and architectural simplicity.

Complex Programmable Logic Devices Replacement Considerations

Direct replacements within the same package and pinout include other CY37256 variants with different speed grades (e.g., -83, -100). For higher density needs, consider CY37384 or CY37512 models, though pinout compatibility varies by package type. Cross-family migration to modern FPGA architectures requires significant redesign.