Infineon Technologies CY37128VP100-125AXC

Overview

CY37128VP100-125AXC from Cypress Semiconductor is a 128-macrocell In-System Reprogrammable (ISR™) Complex Programmable Logic Device (CPLD) in the Ultra37000 family, operating at 3.3V with 125 MHz maximum frequency and 10 ns propagation delay. It features four synchronous clocks, programmable bus-hold on all I/Os, and 100-pin TQFP packaging with 133 I/O pins. Used in PCI-compliant interface logic, FPGA configuration glue, and legacy bus bridging.

For engineers reviewing the CY37128VP100-125AXC datasheet, CY37128VP100-125AXC pinout, CY37128VP100-125AXC application, or CY37128VP100-125AXC equivalent, key selection criteria include its 3.3V operation, JTAG-based ISR capability, 125 MHz f_MAX, 133 I/O count in 100-TQFP, and PCI electrical compliance - all confirmed in Cypress Document #38-03007 Rev. *E.

Technical Context

The CY37128VP100-125AXC implements a modular architecture with multiple logic blocks interconnected via a fully global Programmable Interconnect Matrix (PIM), eliminating route-dependent timing variations. Each logic block contains a 72×87 product term array, intelligent allocator for 0–16 product terms per macrocell, and 16 macrocells supporting D/T/latch configurations.

It supports four global synchronous clocks (CLK0–CLK3) plus one asynchronous product-term clock (PTCLK), all with programmable polarity. All 133 I/Os feature user-configurable bus-hold and slew-rate control (fast/slow), and dedicated input/clock pins enable flexible timing path definition without consuming macrocell resources.

Key Specifications

Pinout & Package

Package: 100-lead Thin Quad Flat Package (TQFP), 14 mm × 14 mm body, 0.5 mm lead pitch, exposed thermal pad (optional). Pinout validated per Cypress Ultra37000 Family Pinout Table (Document #38-03007, pp. 32–35).

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC95144XL-10TQ100C and ispMACH 4A5-128/100, CY37128VP100-125AXC uniquely integrates PCI compliance, per-pin bus-hold, and JTAG-based ISR in a single 3.3V CPLD - reducing BOM count and enabling zero-pull-up board designs for high-reliability industrial interfaces.

Availability

CY37128VP100-125AXC is available at Aetrix Electronics and suitable for PCI interface design, FPGA configuration management, and industrial I/O expansion requiring stable component supply, long-lifecycle support, and verified 3.3V CPLD functionality.

Supply support for CY37128VP100-125AXC 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, founded in 1982 and headquartered in San Jose, CA.

The Ultra37000 CPLD family was designed specifically for high-reliability, pin-compatible migration across density grades in industrial control, telecom infrastructure, and embedded computing - emphasizing ISR, PCI compliance, and simplified timing closure.

FAQ

Is CY37128VP100-125AXC compatible with 5V logic interfaces?

Yes - all I/O pins are 5V-tolerant when VCCIO = 3.3V, meeting JEDEC 3.3V CMOS output specifications while accepting 0–5.5V input voltages. This enables direct connection to 5V buses without level shifters, as confirmed in Cypress Document #38-03007 Section "Ultra37000V 3.3V Devices".

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

No - CY37128VP100-125AXC includes programmable bus-hold circuitry on every I/O pin, which actively retains the last logic state during high-impedance conditions. This eliminates the need for external pull-ups, reducing BOM cost and PCB space, as documented in the "Bus Hold Capabilities" section of the datasheet.

Can the device be reprogrammed while soldered on the target board?

Yes - it supports full In-System Reprogrammability (ISR™) via its IEEE 1149.1 JTAG port (TCK/TMS/TDI/TDO). Reprogramming preserves pinout and timing behavior, allowing firmware updates and logic fixes without device removal or board modification, per Cypress Application Note AN2012.

What clocking options are available for registered logic paths?

The device provides four global synchronous clocks (CLK0–CLK3) and one asynchronous product-term clock (PTCLK), all with programmable polarity. Each macrocell selects its clock source independently, enabling mixed-edge synchronous logic and event-triggered state transitions - detailed in the "Clocking" section of Document #38-03007.