Infineon Technologies CY37064P44-154AXI

Overview

CY37064P44-154AXI 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 154 MHz maximum frequency and 6 ns propagation delay. 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 PCI-compliant interface logic, board-level glue logic, and legacy system upgrades.

For engineers reviewing the CY37064P44-154AXI datasheet, CY37064P44-154AXI pinout, CY37064P44-154AXI application, or CY37064P44-154AXI equivalent, key selection criteria include macrocell count, I/O pin count (37 usable), 5V/3.3V I/O tolerance, JTAG boundary-scan support, and PCI electrical compliance - all confirmed in the Ultra37000 family specification document 38-03007 Rev. *E.

Technical Context

The CY37064P44-154AXI implements a modular architecture with two logic blocks, each containing 32 macrocells, a 72×87 product term array, and an intelligent product term allocator supporting 0–16 product terms per macrocell. Its Programmable Interconnect Matrix (PIM) delivers fixed, route-independent timing by routing all signals-including macrocell feedbacks and dedicated inputs-through a global matrix with worst-case delays embedded in tPD and fMAX specs.

It supports flexible clocking via four global synchronous clocks (CLK0–CLK3) plus one asynchronous product-term clock (PTCLK), all with programmable polarity. All 37 I/Os feature user-configurable bus-hold and slew-rate control (fast/slow), and the device uses JTAG TAP controller (TDI/TDO/TCK/TMS/TRST) for both ISR programming and IEEE 1149.1 boundary-scan testing.

Key Specifications

Pinout & Package

Package: 44-pin Thin Quad Flat Package (TQFP), 10 mm × 10 mm, 0.8 mm pitch, RoHS-compliant and lead-free option available (denoted by 'X' suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY37064P44-154AXI, the AMD XC9572XL offers higher macrocell count but sacrifices PCI compliance and 5V I/O flexibility, while the Lattice LC4064V provides similar density but lacks standardized JTAG and introduces vendor lock-in for debugging and programming workflows.

Availability

CY37064P44-154AXI is available at Aetrix Electronics and suitable for PCI-compliant interface design, industrial control board upgrades, and legacy bus translation requiring stable component supply and long-term lifecycle support.

Supply support for CY37064P44-154AXI 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, and timing-predictable logic replacement for legacy PAL/GAL devices in mission-critical upgrade paths - emphasizing ISR, PCI compliance, and zero-timing-regression reconfiguration.

FAQ

Is CY37064P44-154AXI compatible with 3.3V I/O buses?

Yes - its I/Os are 5V-tolerant and support 3.3V JEDEC CMOS levels when VCCO is connected to 3.3V. However, this part is a 5V-core device (CY37064, not CY37064V), so VCCO must be 5V for full PCI compliance and guaranteed 5V TTL output drive. Using 3.3V on VCCO is possible but voids PCI certification and reduces output drive strength.

Does CY37064P44-154AXI support boundary-scan testing?

Yes - it fully implements IEEE 1149.1 (JTAG) boundary-scan with dedicated TCK, TMS, TDI, TDO, and TRST pins. The internal boundary-scan register supports interconnect testing, I/O pin control, and visibility into macrocell states without requiring functional vectors.

Can the device be reprogrammed while soldered on the PCB?

Yes - In-System Reprogrammability (ISR™) allows full configuration bitstream updates via the JTAG port while the device is powered and mounted on the target board. No socket, UV eraser, or device removal is needed, and pinout/timing remains unchanged after reprogramming.

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 is confirmed in the Ultra37000 architecture documentation (p.4), and the timing specifications account for worst-case allocation - no performance penalty occurs regardless of distribution.