Infineon Technologies CY37128P100-125AXI

Overview

CY37128P100-125AXI from Cypress Semiconductor is a 128-macrocell In-System Reprogrammable (ISR™) Complex Programmable Logic Device (CPLD) in the Ultra37000 family, operating at 5V with 100-pin TQFP package and 125 MHz maximum frequency (tPD = 6.5 ns). It features four synchronous clocks, programmable bus-hold on all I/Os, and JTAG-based reconfiguration without pinout or timing changes - deployed in PCI-compliant industrial control logic and FPGA companion glue logic.

For engineers reviewing the CY37128P100-125AXI datasheet, CY37128P100-125AXI pinout, CY37128P100-125AXI application, or CY37128P100-125AXI equivalent, key selection criteria include macrocell count, I/O pin count (133), tPD timing bin (6.5 ns), VCCO voltage flexibility (3.3V/5V I/O support), and JTAG ISR capability for field updates in embedded systems.

Technical Context

The device implements a multi-block architecture with a global Programmable Interconnect Matrix (PIM) distributing up to 36 signals per logic block, eliminating route-dependent delays. Each logic block contains a 72×87 product term array, intelligent allocator supporting 0–16 product terms per macrocell, and dedicated asynchronous set/reset/product term clock resources.

It supports dual-voltage I/O via separate VCCO pins, enabling 5V-tolerant 3.3V CMOS output levels or standard 5V TTL outputs. Clocking includes four global synchronous clocks (CLK0–CLK3) with polarity control plus one asynchronous product term clock (PTCLK), all configurable per logic block.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY37128P100-125AXI, the -100AXI variant trades 25 MHz bandwidth for lower cost in static logic applications, while the XC95144XL demands full redesign for voltage and toolchain compatibility - making the original part optimal for 5V/3.3V mixed-signal industrial upgrades.

Availability

CY37128P100-125AXI is available at Aetrix Electronics and suitable for PCI-compliant interface design, industrial I/O expansion, and FPGA companion logic requiring stable component supply across extended production lifecycles.

Supply support for CY37128P100-125AXI 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.

This device belongs to the Ultra37000 CPLD family, engineered for high-density, pin-stable reprogrammable logic in systems demanding PCI compliance, mixed-voltage interfacing, and field-upgradable functionality.

FAQ

What voltage levels does CY37128P100-125AXI support on its I/O pins?

CY37128P100-125AXI supports both 3.3V and 5V I/O levels via configurable VCCO pins. When VCCO is tied to 5V, outputs meet 5V TTL specifications; when tied to 3.3V, outputs comply with 3.3V JEDEC CMOS standards and remain 5V-tolerant on inputs. Core VCC must be 5V.

Can CY37128P100-125AXI replace older 22V10-style PAL devices?

Yes - it provides functional and timing equivalence to multiple 22V10 devices in a single package, with enhanced features including JTAG ISR, bus-hold, and flexible clocking. Pin-compatible migration is supported via software mapping tools, preserving existing board layouts and timing margins.

Is the 100-pin TQFP package lead-free and RoHS-compliant?

Yes - the "X" suffix in CY37128P100-125AXI indicates a lead-free, RoHS-compliant version. The device uses matte tin finish and meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) requirements for standard surface-mount assembly.

Does CY37128P100-125AXI require external configuration memory?

No - it is non-volatile and retains configuration without external memory. Programming occurs via JTAG using the internal EEPROM cell array. Configuration is retained indefinitely after power removal and supports unlimited reprogramming cycles (≥10,000).