Infineon Technologies CY37512P256-100BGI

Overview

CY37512P256-100BGI from Cypress Semiconductor is a 5V In-System Reprogrammable (ISR™) Complex Programmable Logic Device (CPLD) in the Ultra37000 family, featuring 512 macrocells, 264 I/O pins, and a 10 ns propagation delay (tPD). It implements a programmable interconnect matrix (PIM) architecture with four synchronous clocks per logic block and supports JTAG-based reconfiguration without pinout or timing changes. It is used in PCI-compliant interface logic, legacy bus bridging, and FPGA configuration glue logic.

For engineers reviewing the CY37512P256-100BGI datasheet, CY37512P256-100BGI pinout, CY37512P256-100BGI application, or CY37512P256-100BGI equivalent, this page delivers verified macrocell count, I/O count, tPD, fMAX, package mapping, and ISR timing stability - critical for migration from older 22V10-based designs or replacement of obsolete PLDs in industrial control backplanes.

Technical Context

The CY37512P256-100BGI implements a multi-block CPLD architecture with eight logic blocks, each containing a 72×87 product term array, intelligent product term allocator (0–16 terms/macrocell), and 16 macrocells (mix of I/O and buried). All inputs route through a global Programmable Interconnect Matrix (PIM) with fixed, route-independent delays fully incorporated into timing specs.

It supports five dedicated input pins (four clock-capable), programmable bus-hold on all I/Os, slew-rate control per output, and dual-voltage I/O operation (5V VCC with 3.3V/5V VCCO selection). The device uses JTAG-compliant TDI/TDO for ISR programming and boundary scan, meeting PCI Local Bus electrical and timing requirements.

Key Specifications

Pinout & Package

This device is packaged in a 256-lead Fine-Pitch Ball Grid Array (FBGA) with 1.0 mm pitch, RoHS-compliant and lead-free. Pinout follows Cypress's standardized Ultra37000 256-pin FBGA footprint (package code "BGI"), supporting consistent layout reuse across density variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC95512-10PQ208C and ISPLSI5256VE-100LT100, CY37512P256-100BGI uniquely combines 264 I/Os, 5V/3.3V I/O flexibility, built-in bus-hold, and PCI compliance in a fine-pitch FBGA - making it the sole option for high-I/O, mixed-voltage, field-upgradable backplane controllers.

Availability

CY37512P256-100BGI is available at Aetrix Electronics and suitable for PCI add-in card manufacturing, industrial backplane design, and FPGA configuration management requiring stable component supply, long-lifecycle support, and JTAG-based field updates.

Supply support for CY37512P256-100BGI 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-stable replacements for legacy 22V10 and PAL devices - targeting applications demanding in-system reprogrammability and mixed-voltage interoperability without redesign.

FAQ

Is CY37512P256-100BGI compatible with 3.3V I/O signaling?

Yes - the device operates from a 5V VCC supply but supports 3.3V I/O levels when VCCO pins are connected to 3.3V. Its outputs meet 3.3V JEDEC CMOS standards and are 5V-tolerant, enabling safe interfacing with both 3.3V and 5V systems without external level shifters.

Does this device require external programming hardware?

No - CY37512P256-100BGI features IEEE 1149.1 JTAG support for in-system reprogramming using standard boundary-scan tools. No external UV eraser or dedicated programmer is needed; configuration updates occur via TDI/TDO pins directly on the powered board.

What is the maximum number of logic blocks and how are macrocells distributed?

The CY37512P256-100BGI contains eight logic blocks, each with 64 macrocells (512 total). Each block includes a 72×87 product term array, intelligent allocator, and supports up to 16 macrocells with configurable I/O/buried ratio - enabling flexible partitioning of registered and combinatorial logic resources.

Can unused I/O pins be left floating without external components?

Yes - all I/Os include user-programmable bus-hold circuitry, which latches the last driven state when the pin enters high-impedance mode. This eliminates the need for external pull-up/down resistors and prevents floating inputs from causing noise or unintended logic transitions.