Infineon Technologies CY37064P44-125AXCT

Overview

CY37064P44-125AXCT from Cypress Semiconductor is a 64-macrocell In-System Reprogrammable (ISR™) Complex Programmable Logic Device (CPLD) in the Ultra37000 family, operating at 5V with 125 MHz maximum frequency (f_MAX) and 6 ns propagation delay (t_PD). It features 37 I/O pins in a 44-lead TQFP package, four dedicated synchronous clocks, JTAG-compliant ISR, and programmable bus-hold on all I/Os - deployed in industrial control logic, legacy bus interface adaptation, and FPGA configuration glue logic.

For engineers reviewing the CY37064P44-125AXCT datasheet, CY37064P44-125AXCT pinout, CY37064P44-125AXCT application, or CY37064P44-125AXCT equivalent, key selection criteria include its fixed-pinout migration path across Ultra37000 densities, zero-delay PIM routing model, 0–16 product-term allocation per macrocell, and PCI-compliant 5V/3.3V I/O tolerance with VCCO-selectable output levels.

Technical Context

The CY37064P44-125AXCT implements a modular architecture with two logic blocks, each containing a 72×87 product term array, intelligent product term allocator, and 16 macrocells (mix of I/O and buried). All signals route through a fully global Programmable Interconnect Matrix (PIM) with no fanout, expander, or pin-type delay penalties - timing is deterministic and route-independent.

Each macrocell supports combinatorial, D/T/latch register modes with asynchronous set/reset controlled by dedicated product terms, plus configurable clock polarity for all four synchronous clocks (CLK0–CLK3) and one product-term clock (PTCLK). Bus-hold and slew-rate control are per-I/O programmable, and all I/Os are 5V-tolerant when VCCO = 3.3V.

Key Specifications

Pinout & Package

Package: 44-lead Thin Quad Flat Package (TQFP), 10 mm × 10 mm, 0.8 mm pitch, RoHS-compliant (Pb-free).

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC9572XL-10VQG44C and ATF1504AS-10QU44, CY37064P44-125AXCT uniquely delivers PCI-compliant 5V/3.3V I/O flexibility, deterministic 6 ns timing, and integrated bus-hold - making it the only option among the three qualified for mixed-voltage industrial bus interface designs requiring zero-pin-change reprogramming.

Availability

CY37064P44-125AXCT is available at Aetrix Electronics and suitable for industrial PLC expansion, legacy bus bridge logic, and FPGA configuration management requiring stable component supply and long-term lifecycle support.

Supply support for CY37064P44-125AXCT 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 specializing in programmable logic, memory, and USB/USB-C solutions for industrial, automotive, and consumer applications.

The Ultra37000 CPLD family was designed to deliver high-density, pin-compatible, in-system reprogrammable logic with deterministic timing - specifically targeting replacement of obsolete PAL/GAL devices and simplifying board-level logic upgrades in mission-critical systems.

FAQ

What voltage levels does CY37064P44-125AXCT support on its I/O pins?

CY37064P44-125AXCT operates from a 5V VCC supply and supports dual-voltage I/O via VCCO: when VCCO = 5V, outputs meet 5V TTL levels; when VCCO = 3.3V, outputs meet 3.3V JEDEC CMOS levels and remain 5V-tolerant. This eliminates need for external level shifters in mixed-voltage systems.

Can CY37064P44-125AXCT be reprogrammed while soldered on the target board?

Yes - CY37064P44-125AXCT supports full IEEE 1149.1 JTAG-based In-System Reprogrammability (ISR™). The device retains its pinout and timing characteristics across reprogramming events, enabling field firmware updates and design iterations without hardware modification.

Does this device require external pull-up resistors on unused I/O pins?

No - CY37064P44-125AXCT includes programmable bus-hold circuitry on every I/O pin. When enabled, this weak latch maintains the last driven logic state during high-impedance conditions, eliminating external pull-ups and allowing safe floating of unused pins during prototyping or partial pin utilization.

How many clock domains can be implemented simultaneously in this CPLD?

CY37064P44-125AXCT provides four dedicated global synchronous clocks (CLK0–CLK3), each independently configurable for rising or falling edge triggering per logic block, plus one asynchronous product-term clock (PTCLK). This supports up to five concurrent clock domains - sufficient for multi-rate interface bridging and hierarchical state machine design.