Infineon Technologies CY37256P160-125AXC

Overview

CY37256P160-125AXC 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 125 MHz maximum frequency (tPD = 7.5 ns). It features four synchronous clocks per logic block, programmable bus-hold on all I/Os, and JTAG-compliant ISR for field reconfiguration without pinout or timing changes. It is used in PCI-compliant interface logic, legacy system glue logic, and FPGA configuration management.

For engineers reviewing the CY37256P160-125AXC datasheet, CY37256P160-125AXC pinout, CY37256P160-125AXC application, or CY37256P160-125AXC equivalent, key selection criteria include macrocell count, I/O count (160), propagation delay (7.5 ns), JTAG-based ISR capability, and 5V/3.3V I/O compatibility via VCCO pin configuration.

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 product term allocator (0–16 terms per macrocell), and 16 macrocells-supporting combinatorial, registered, latched, or T/D-flip-flop configurations.

It supports five dedicated inputs (four clock-capable), programmable slew rate control per output, asynchronous set/reset product terms with polarity control, and product term clocking. All I/Os feature user-enabled bus-hold, and timing is deterministic-no fanout, expander, or PIM routing penalties apply.

Key Specifications

Pinout & Package

This device is packaged in a 160-lead Thin Quad Flat Package (TQFP) with 0.5 mm pitch, 24 × 24 mm body size, and exposed thermal pad. Pin numbering follows standard TQFP counter-clockwise convention starting from top-left corner (Pin 1 marked).

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 EPM7256AETC144-10, CY37256P160-125AXC uniquely combines 5V operation, 160 I/Os, PCI compliance, and JTAG-based ISR-enabling field-upgradable, mixed-voltage glue logic with full production test coverage.

Availability

CY37256P160-125AXC is available at Aetrix Electronics and suitable for PCI interface design, legacy bus translation, FPGA configuration management, and real-time control state machine implementation requiring stable component supply and long-term lifecycle support.

Supply support for CY37256P160-125AXC 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 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 system-level glue logic, interface bridging, and FPGA companion functions-emphasizing ease of migration and deterministic timing.

FAQ

What is the difference between CY37256P160-125AXC and CY37256V-125AXC?

CY37256P160-125AXC is a 5V-core device with 160 I/Os in TQFP package and supports both 5V and 3.3V I/O levels via VCCO configuration. CY37256V-125AXC is a 3.3V-core variant with identical macrocell count but different speed bin (100 MHz fMAX), lower power consumption, and no 5V supply requirement. They are not pin-compatible due to differing VCC/VCCO pin assignments and voltage domain constraints.

Does CY37256P160-125AXC support boundary scan testing?

Yes-it fully complies with IEEE 1149.1 (JTAG) boundary scan. The TCK, TMS, TDI, and TDO pins implement mandatory boundary scan instructions (SAMPLE/PRELOAD, EXTEST, INTEST), enabling automated PCB test, interconnect verification, and in-system programming without requiring additional test fixtures or probes.

Can this CPLD be used in a 3.3V-only system without level shifters?

Yes-if VCCO pins are tied to 3.3V, outputs meet 3.3V JEDEC CMOS levels and remain 5V-tolerant on inputs. However, the core VCC must remain at 5V; it cannot operate from a 3.3V supply. For true 3.3V-core operation, CY37256V-125AXC is required.

Is the 125 in the part number related to speed grade or temperature range?

The "125" denotes the speed grade: 125 MHz maximum operating frequency (fMAX) and 7.5 ns propagation delay (tPD). It is not a temperature rating-the device is rated for commercial temperature range (0°C to +70°C), indicated by the "C" suffix in the full ordering code.