Infineon Technologies CY37128VP100-83AXI

Overview

CY37128VP100-83AXI from Cypress Semiconductor is a 3.3V In-System Reprogrammable (ISR™) Complex Programmable Logic Device (CPLD) in the Ultra37000 family, featuring 128 macrocells, 5 dedicated inputs (including 4 clock pins), and 133 I/O pins in a 100-lead TQFP package. It supports 3.3V JEDEC CMOS output levels with 5V-tolerant I/Os, programmable slew rate control, and JTAG-based reconfiguration without pinout or timing changes. It is used in PCI-compliant interface logic, FPGA configuration glue logic, and legacy bus bridging.

For engineers reviewing the CY37128VP100-83AXI datasheet, CY37128VP100-83AXI pinout, CY37128VP100-83AXI application, or CY37128VP100-83AXI equivalent, key selection criteria include its 125 MHz fMAX (10 ns tPD), 5V-tolerant I/O capability, per-macrocell product term allocation (0–16 terms), flexible clocking (4 synchronous + 1 product-term clock), and bus-hold programmability on all I/Os.

Technical Context

The CY37128VP100-83AXI implements a modular architecture with multiple logic blocks interconnected via a fully global Programmable Interconnect Matrix (PIM), eliminating route-dependent delays. Each logic block contains a 72×87 product term array, intelligent allocator for up to 16 product terms per macrocell, and 16 macrocells-some configured as I/O, others as buried registers.

It supports four synchronous clocks (CLK0–CLK3) with programmable polarity per logic block, plus an asynchronous product-term clock (PTCLK). All I/Os feature user-programmable bus-hold, slew-rate control (fast/slow), and OE product-term control with polarity selection-enabling deterministic timing and robust noise immunity in mixed-voltage systems.

Key Specifications

Pinout & Package

Package: 100-lead Thin Quad Flat Package (TQFP), 14 mm × 14 mm, 0.5 mm pitch, RoHS-compliant and lead-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY37128VP100-83AXI, the XC95144XL offers higher density but sacrifices field update capability and mixed-voltage robustness, while the ispMACH 4128V matches density and ISR but adds design overhead for bus-hold and compliance validation.

Availability

CY37128VP100-83AXI is available at Aetrix Electronics and suitable for PCI interface glue logic, FPGA configuration controllers, and industrial I/O expansion requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for CY37128VP100-83AXI 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 programmable logic for legacy interface bridging and system-level glue logic-emphasizing ISR flexibility and PCI compliance without sacrificing performance.

FAQ

Is CY37128VP100-83AXI compatible with 5V logic interfaces?

Yes-its I/Os are fully 5V-tolerant when VCCO = 3.3V, meeting JEDEC 3.3V CMOS output specs while accepting 0–5V input signals. This enables direct interfacing with 5V TTL/CMOS peripherals without level shifters, provided VIH remains ≥2.0V (PCI-compliant threshold).

Does this device support in-system programming without external hardware?

Yes-it features a JTAG-compliant ISR interface using TCK, TMS, TDI, and TDO pins. Programming requires only a standard JTAG adapter (e.g., Segger J-Link or Cypress MiniProg3); no UV eraser, socket, or voltage-programming circuitry is needed.

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 fixed partitioning limits functional flexibility.

Can unused I/O pins be left unconnected safely?

Yes-bus-hold is enabled by default on all I/Os and can be disabled per-pin in the design file. When active, it maintains the last driven state during high-impedance conditions, preventing floating inputs and reducing system noise without external resistors.