Infineon Technologies CY37064P44-125AXIT

Overview

CY37064P44-125AXIT from Cypress Semiconductor is a 64-macrocell In-System Reprogrammable (ISR™) Complex Programmable Logic Device (CPLD) in a 44-pin TQFP package, operating at 5V with 125 MHz maximum frequency (f_MAX) and 12.5 ns propagation delay (t_PD). It features four synchronous clocks, five dedicated inputs (including four clock pins), programmable bus-hold on all I/Os, and JTAG-compliant ISR for field reconfiguration without pinout or timing changes. Used in legacy PCI interface logic, FPGA companion control, and industrial I/O expansion.

For engineers reviewing the CY37064P44-125AXIT datasheet, CY37064P44-125AXIT pinout, CY37064P44-125AXIT application, or CY37064P44-125AXIT equivalent, key selection criteria include its fixed 44-pin TQFP footprint across 5V Ultra37000 densities, deterministic timing model with no fanout/expander penalties, 32 I/O count, 125 MHz f_MAX, and JTAG-based in-system reprogrammability supporting design iteration without PCB respin.

Technical Context

The CY37064P44-125AXIT implements a two-block Ultra37000 architecture, each containing 32 macrocells, a 72×87 product term array, intelligent product term allocator (0–16 terms per macrocell), and 36 PIM inputs. Its Programmable Interconnect Matrix (PIM) routes all I/O and macrocell feedback signals globally with fixed, worst-case delay incorporated into t_PD specs - eliminating route-dependent timing variation.

Each logic block supports four global synchronous clocks (CLK0–CLK3) with polarity control, one asynchronous product-term clock (PTCLK), dedicated set/reset product terms with OR/AND capability, and dual OE product terms per half-block. All 32 I/Os feature programmable slew rate (fast/slow) and bus-hold latching, enabling robust 5V/3.3V mixed-signaling without external pull-ups.

Key Specifications

Pinout & Package

44-pin Thin Quad Flat Package (TQFP), 10 × 10 mm body, 0.8 mm lead pitch, RoHS-compliant, lead-free option available. Pinout conforms to Ultra37000 family standard layout for 44-lead TQFP - identical across CY37032/CY37064/CY37128 5V devices.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CPLD-based glue logic applications.

Compared with CY37064P44-200AXIT, the -125AXIT offers lower power and sufficient speed for most PCI-33 and microcontroller interface applications; versus XC9572XL, it provides native 5V/3.3V mixed signaling, JTAG-standard ISP, and guaranteed PCI electrical compliance - critical for industrial backplane reuse.

Availability

CY37064P44-125AXIT is available at Aetrix Electronics and suitable for PCI interface logic, FPGA configuration controllers, and industrial I/O expansion requiring stable component supply across extended production lifecycles.

Supply support for CY37064P44-125AXIT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) is a U.S.-based semiconductor company founded in 1982, specializing in programmable logic, memory, USB, and automotive microcontrollers.

The Ultra37000 CPLD family was designed to deliver high-density, pin-compatible, in-system reprogrammable logic for PCI-compliant industrial and communications systems - emphasizing deterministic timing, low-risk design migration, and long-term supply stability.

FAQ

Is CY37064P44-125AXIT compatible with 3.3V I/O interfaces?

Yes. When VCCO pins are connected to 3.3V, the device delivers 3.3V JEDEC-standard CMOS output levels and accepts 5V-tolerant inputs up to 5.5V. This enables direct interfacing with 3.3V FPGAs or microcontrollers without level shifters, while maintaining full 5V system compatibility on shared buses.

Does this device require external programming hardware?

No. The CY37064P44-125AXIT uses IEEE 1149.1-compliant JTAG pins (TCK, TMS, TDI, TDO) for in-system reprogramming. Standard JTAG debuggers or low-cost USB-JTAG adapters (e.g., Segger J-Link, Digilent HS2) can configure and verify the device directly on the target board without socketing or UV erasure.

Can I migrate from CY37032P44-200AXIT to this part without PCB changes?

Yes. The CY37064P44-125AXIT shares identical 44-pin TQFP mechanical footprint, pin assignment, and power pin locations with CY37032P44-200AXIT and CY37128P44-167AXIT. Only the internal logic density and speed grade differ - enabling seamless upgrade path via firmware recompilation and reprogramming.

What development tools support this CPLD?

Cypress Warp v9.5 (legacy) and third-party tools including Lattice Diamond (via .jed import) and open-source xc3sprog (with JTAG adapter) fully support programming. Timing analysis and place-and-route are validated using Cypress's official timing models in Warp, ensuring accurate f_MAX and t_PD predictions for the -125 speed bin.