CY37256VP256-66BBI

Product Overview

CY37256VP256-66BBI is a Cypress Ultra37000 complex programmable logic device associated with Cypress Semiconductor / Infineon, providing 256 macrocells for deterministic control, decoding, sequencing and interface functions. Its nonvolatile architecture is available immediately after power-up and avoids the external configuration memory normally required by an SRAM FPGA. The complete ordering suffix selects package, pin count, speed grade and temperature option and must be preserved during sourcing or design migration.

This ordering variant belongs to the 5 V / 3.3 V Ultra37000 family. The -66 speed token identifies its timing grade. Package and pin count must be confirmed from the exact ordering table. It also carries a industrial-temperature ordering suffix. These suffix details affect PCB footprint, I/O availability, timing closure and environmental qualification; they are not cosmetic ordering differences.

Architecture and Technical Characteristics

Ultra37000 devices use in-system-reprogrammable macrocells and a programmable interconnect architecture for dense control and decode logic. The family supports nonvolatile configuration and board-level reprogramming, but I/O count, voltage option, timing and package availability change across CY37032 through CY37512 members. Those values are assigned only when the exact ordering code is confirmed.

Key Features

• Manufacturer / historical brand: Cypress Semiconductor / Infineon
• Full part number: CY37256VP256-66BBI
• CPLD family: Cypress Ultra37000
• Logic capacity: 256 macrocells
• Logic organization: logic array blocks with programmable interconnect
• Configuration technology: in-system reprogrammable nonvolatile CPLD
• Voltage class: 5 V / 3.3 V Ultra37000 family
• Speed-grade designator: -66; guaranteed timing must be taken from the exact device speed table
• Temperature / qualification: industrial-temperature ordering suffix
• Programming interface: JTAG/ISP where supported by the exact family member
• Programming file: use the Quartus-generated POF/JAM/JBC/SVF flow supported for the target device and programming hardware
• I/O count: package-dependent; confirm in the official pin-out file rather than using package terminal count as user I/O count

Applications

• Address decoding and chip-select generation
• Reset, power sequencing and supervisory control
• Bus bridging, protocol glue and interface qualification
• Deterministic finite-state machines
• Higher-density board-control consolidation and peripheral management
• Industrial, communications and legacy platform maintenance

Design and Replacement Considerations

Before replacing this device, compare macrocell capacity, usable I/O for the selected package, core and I/O rails, input tolerance, global clock and reset resources, power-up behavior, JTAG pinout and guaranteed propagation/setup/clock-to-output timing. Preserve the original project and programming file. A blank CPLD does not contain the customer function, and a JEDEC or SVF file compiled for a related density or package must not be assumed compatible. When migrating to another family, recompile, rerun fitter constraints and perform timing and board-level voltage validation.

Quality & Sourcing

For CY37256VP256-66BBI, Antrex Electronics can support stock and lead-time checks, full-suffix confirmation, package and date-code review, product photographs, label inspection and shipment planning. Buyers should state whether blank or pre-programmed parts are required and provide the target quantity, acceptable date code, packaging form and inspection requirements. For discontinued or long-stored CPLDs, recommended controls include traceability review, marking comparison, lead and ball-condition inspection, solderability evaluation and third-party electrical or X-ray testing when risk warrants it. OEMs, EMS providers, repair centers and component buyers may submit BOM lists and hard-to-find programmable-logic requirements for sourcing support.