Infineon Technologies CY37064P44-125AXI

Overview

CY37064P44-125AXI 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 configuration glue, and industrial control state machines.

For engineers reviewing the CY37064P44-125AXI datasheet, CY37064P44-125AXI pinout, CY37064P44-125AXI application, or CY37064P44-125AXI equivalent, key selection criteria include its 125 MHz f_MAX, 44-pin TQFP footprint, 5V supply with 3.3V-tolerant I/O, JTAG-based ISR capability, and fixed timing model enabling design iteration without layout revision.

Technical Context

The CY37064P44-125AXI implements the Ultra37000 architecture with two logic blocks, each containing a 72×87 product term array, intelligent product term allocator (0–16 terms per macrocell), and 16 macrocells (mix of I/O and buried). Its Programmable Interconnect Matrix (PIM) delivers 36 global inputs per logic block with no route-dependent delays - all worst-case PIM timing is embedded in t_PD and f_MAX specs.

It supports flexible clocking: four global synchronous clocks (CLK0–CLK3) with polarity control, plus one asynchronous product-term clock (PTCLK); all macrocells support D/T/latch configurations with programmable asynchronous set/reset. Bus-hold and slew-rate control are per-I/O configurable.

Key Specifications

Pinout & Package

Package: 44-pin Thin Quad Flat Package (TQFP), 10 mm × 10 mm, 0.8 mm pitch, lead-free (RoHS-compliant), body height 1.2 mm.

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 ATF1502AS-10AU44, CY37064P44-125AXI uniquely combines 5V operation, JTAG ISR, deterministic timing, and intelligent product term allocation - making it optimal for PCI-compliant, field-upgradable industrial control where voltage flexibility and timing predictability are mandatory.

Availability

CY37064P44-125AXI is available at Aetrix Electronics and suitable for PCI interface design, FPGA configuration management, and industrial I/O expansion requiring stable component supply across long-lifecycle embedded programs.

Supply support for CY37064P44-125AXI 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 mixed-signal solutions for industrial, automotive, and communications markets.

The Ultra37000 CPLD family was designed to deliver high-density, pin-compatible, in-system reprogrammable logic with deterministic timing - targeting legacy system upgrades, PCI-compliant glue logic, and field-serviceable control hardware.

FAQ

Is CY37064P44-125AXI compatible with 3.3V I/O buses?

Yes. When VCCO pins are connected to 3.3V, outputs meet 3.3V JEDEC standard CMOS levels and remain 5V-tolerant on inputs. The core remains 5V-powered, and ISR programming requires 5V on VCC. This dual-voltage capability enables direct interfacing with both 3.3V and 5V subsystems without level shifters.

Does CY37064P44-125AXI support boundary-scan testing?

Yes. It implements full IEEE 1149.1 (JTAG) boundary-scan functionality, including EXTEST, SAMPLE/PRELOAD, and BYPASS instructions. All 37 I/Os and dedicated inputs are accessible via boundary-scan cells, enabling board-level interconnect testing and in-circuit verification without physical probes.

Can the device retain configuration after power loss?

No. CY37064P44-125AXI is SRAM-based and requires external configuration on power-up. It does not contain non-volatile storage. Configuration is typically loaded from an external SPI EEPROM or microcontroller during boot - JTAG can also be used for initial programming or field updates.

What is the maximum number of product terms usable per macrocell?

Up to 16 product terms can be allocated to any single macrocell via the intelligent product term allocator. This allocation is dynamic and software-determined during place-and-route - no hardware limitation restricts usage, and all 16 terms contribute directly to the macrocell's logic equation without performance penalty.