Infineon Technologies CY37128P100-100AXC

Overview

CY37128P100-100AXC 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 packaging and 6.5 ns propagation delay. It features four synchronous clocks, five dedicated inputs (including four clock pins), programmable bus-hold on all I/Os, and supports PCI Local Bus electrical compliance. It is used in legacy industrial control logic replacement and FPGA configuration glue logic.

For engineers reviewing the CY37128P100-100AXC datasheet, CY37128P100-100AXC pinout, CY37128P100-100AXC application, or CY37128P100-100AXC equivalent, key selection criteria include macrocell count, I/O pin count (133 usable), JTAG-based ISR capability, timing predictability under product-term steering/sharing, and 5V/3.3V I/O flexibility via VCCO pin configuration.

Technical Context

The CY37128P100-100AXC implements a modular architecture with multiple logic blocks interconnected by a fully global Programmable Interconnect Matrix (PIM), where all signals-including macrocell feedbacks and I/O pins-pass through the PIM with fixed, route-independent delay. Each logic block contains a 72 × 87 product term array, intelligent allocator for 0–16 product terms per macrocell, and 16 macrocells (mix of I/O and buried).

It supports flexible clocking: four global synchronous clocks (CLK0–CLK3) with polarity control per logic block, plus one asynchronous product term clock (PTCLK); all macrocells accept any of these clocks. Dedicated input/clock pins provide configurable register/latch modes and feed clock distribution networks directly.

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 (AXC suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC95144XL-10TQ100I and ATF1508AS-10QU100, CY37128P100-100AXC uniquely combines 5V operation, VCCO-configurable I/O, four dedicated clock inputs, and PCI compliance - making it the only choice for upgrading legacy 5V industrial backplanes requiring zero-pin-change migration and guaranteed timing stability.

Availability

CY37128P100-100AXC is available at Aetrix Electronics and suitable for industrial control logic replacement, PCI add-in card development, and FPGA configuration support requiring stable component supply over extended production lifecycles.

Supply support for CY37128P100-100AXC 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-stable, timing-predictable logic replacement for legacy PLDs - targeting applications where design iteration, long-term supply, and mixed-voltage interoperability are critical.

FAQ

What voltage levels does CY37128P100-100AXC support on its I/O pins?

CY37128P100-100AXC supports both 3.3V and 5V I/O signaling through separate VCCO pins. When VCCO = 5V, outputs meet 5V TTL levels; when VCCO = 3.3V, outputs comply with 3.3V JEDEC CMOS standards and remain 5V-tolerant. Core logic operates at 5V VCC regardless of VCCO setting.

Can CY37128P100-100AXC be reprogrammed while soldered onto a PCB?

Yes - CY37128P100-100AXC supports full In-System Reprogrammability (ISR™) via its IEEE 1149.1 JTAG interface (TCK/TMS/TDI/TDO). Reprogramming preserves pinout and timing behavior, enabling field updates without device removal or system downtime.

How many logic blocks and macrocells are implemented in this device?

CY37128P100-100AXC contains eight logic blocks, each with 16 macrocells, totaling 128 macrocells. Each logic block includes a 72 × 87 product term array, intelligent product term allocator, and dedicated I/O cells - with up to 133 usable I/O pins in the 100-pin TQFP package.

Does this CPLD support PCI Local Bus signaling requirements?

Yes - CY37128P100-100AXC is explicitly designed to meet PCI Local Bus Specification electrical and timing requirements, including VIH ≥ 2.0V, VOL ≤ 0.4V, and tSKO/tVAL compliance at 33 MHz. Its 5V-tolerant I/Os and dedicated clock inputs simplify direct integration into PCI add-in cards.