CY37064P44-125AC

Complex Programmable Logic Devices Overview

The CY37064P44-125AC is a 5V, In-System Reprogrammable (ISR) CMOS Complex Programmable Logic Device (CPLD) from the Ultra37000 family. It contains 64 macrocells and supports up to 44 I/O pins in a 44-lead package. The device operates at a maximum frequency of 125 MHz with a worst-case propagation delay of 8 ns. It features a simple timing model with no fanout or expander delays, ensuring consistent performance regardless of logic complexity. The architecture includes a Programmable Interconnect Matrix (PIM), intelligent product term allocation, and flexible clocking options.

Complex Programmable Logic Devices Feature Summary

• In-System Reprogrammable (ISR) via JTAG interface for design changes without pinout or timing shifts
• High-density architecture with 64 macrocells, 5 dedicated inputs, and up to 44 I/Os
• Simple timing model: 8 ns max propagation delay, no routing-dependent delays
• Programmable bus-hold on all I/Os and configurable slew rate control

Complex Programmable Logic Devices Applications

• PCI Local Bus compliant digital logic interfacing
• System logic replacement for legacy TTL/CMOS circuits
• Prototyping and field upgrades requiring reconfigurable logic

Complex Programmable Logic Devices Procurement Notes

Verify the manufacturer origin as Cypress Semiconductor, now part of Infineon Technologies. Confirm the package type corresponds to the 44-lead TQFP, PLCC, or CLCC variant indicated by the suffix. Ensure the speed grade matches the -125 bin (125 MHz / 8 ns). Check for lead-free compliance if required by environmental standards.

Complex Programmable Logic Devices Selection Notes

Select this device for applications requiring 64 macrocells with fixed pinout compatibility during design iterations. The -125 speed bin provides 8 ns worst-case delay suitable for moderate-speed synchronous systems. Compare against CY37064V series if 3.3V supply operation is preferred. Ensure the design utilizes the ISR capability for future updates without board respins.

Complex Programmable Logic Devices Part Context

This component belongs to the Ultra37000 CPLD family, which bridges the gap between simple GALs and high-density FPGAs. The family emphasizes predictable timing and ease of use through its uniform architecture across densities. The CY37064 represents the entry-level density option with 64 macrocells, offering a cost-effective solution for small-scale programmable logic needs.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-compatible replacements within the same speed bin include other CY37064 variants with different package codes (e.g., CY37064P44-100AC). For higher density, migration to CY37128 requires pinout verification. Cross-family replacements are not directly compatible due to architectural differences.