Infineon Technologies CY37256P160-83AXI

Overview

CY37256P160-83AXI from Cypress Semiconductor is a 256-macrocell In-System Reprogrammable (ISR™) Complex Programmable Logic Device (CPLD) in the Ultra37000 family, operating at 5V with 160 I/O pins and 83 MHz maximum frequency (tPD = 7.5 ns). It features four synchronous clocks, 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, FPGA configuration glue, and legacy bus bridging.

For engineers reviewing the CY37256P160-83AXI datasheet, CY37256P160-83AXI pinout, CY37256P160-83AXI application, or CY37256P160-83AXI equivalent, key selection criteria include macrocell count, I/O count, tPD/fMAX speed bin, VCC/VCCO voltage compatibility, and JTAG boundary-scan support for system-level testability.

Technical Context

The CY37256P160-83AXI implements a multi-block architecture with a global Programmable Interconnect Matrix (PIM) distributing up to 36 signals per logic block and supporting full macrocell feedback routing. Its timing model eliminates fanout, expander, and PIM path-dependent delays-worst-case propagation is fully characterized in tPD = 7.5 ns.

Each logic block contains a 72 × 87 product term array, intelligent allocator assigning 0–16 product terms per macrocell, and dedicated asynchronous set/reset, OE, and product-term clock functions-all with polarity control. Clocking includes four global synchronous clocks (CLK0–CLK3) plus one asynchronous product-term clock (PTCLK), all configurable per logic block.

Key Specifications

Pinout & Package

This device is packaged in a 160-lead TQFP (Thin Quad Flat Package) with 0.5 mm pitch, body size 24 × 24 mm, and exposed thermal pad. Pin numbering follows standard TQFP convention (counter-clockwise from index mark).

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC95288XL-10TQ144 and ISPLSI5256VE-100LT128, CY37256P160-83AXI uniquely delivers 5V/3.3V mixed I/O, PCI-compliant signaling, and 160 I/Os in a single 160-pin package-making it optimal for retrofitting legacy 5V systems while supporting modern low-voltage interfaces.

Availability

CY37256P160-83AXI is available at Aetrix Electronics and suitable for PCI interface design, FPGA configuration management, and industrial I/O expansion requiring stable component supply across long-lifecycle embedded programs.

Supply support for CY37256P160-83AXI 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 USB/USB-C 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 system-level glue logic, bus interfacing, and FPGA companion functions-targeting applications where reliability and field-upgradability are critical.

FAQ

What voltage levels does CY37256P160-83AXI support on its I/O pins?

CY37256P160-83AXI supports both 3.3V and 5V I/O signaling via separate VCCO pins. When VCCO is tied to 3.3V, outputs meet JEDEC 3.3V CMOS levels and remain 5V-tolerant. At 5V VCCO, outputs deliver standard 5V TTL levels. Core VCC must be 5V in all configurations.

Does CY37256P160-83AXI require external configuration memory?

No. CY37256P160-83AXI contains on-chip nonvolatile configuration memory and powers up in user-defined state. It does not rely on external PROM or flash for initialization-configuration is retained after power cycling and reprogrammable via JTAG without external hardware.

Can CY37256P160-83AXI replace older 22V10-style PAL devices?

Yes-its architecture extends the 22V10 paradigm with scalable macrocell count, global routing, and ISR capability. With 256 macrocells and 160 I/Os, it replaces multiple 22V10s in consolidated glue logic, while retaining familiar ABEL/VHDL design flows and offering superior routability and timing predictability.

Is JTAG boundary scan supported for production testing?

Yes. CY37256P160-83AXI implements full IEEE 1149.1 boundary scan functionality, enabling automated PCB test, interconnect verification, and in-system programming. Scan chain access is available through TCK, TMS, TDI, and TDO pins with no additional configuration required.