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Infineon Technologies CY37256P208-83NXC
- Part No.:
- CY37256P208-83NXC
- Manufacturer:
- Infineon Technologies
- Package:
- 208-BFQFP
- Datasheet:
-
CY37256P208-83NXC.pdf
- Description:
- IC CPLD 256MC 15NS 208QFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,018
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Product details
Overview
CY37256P208-83NXC from Cypress Semiconductor is a 256-macrocell In-System Reprogrammable (ISR™) Complex Programmable Logic Device (CPLD) in the Ultra37000 family, operating at 5V with 83 ns maximum propagation delay (tPD) and 154 MHz maximum frequency (fMAX). It features 5 dedicated inputs (including 4 clock pins), 192 I/O pins in a 208-pin PQFP package, JTAG-compliant ISR, and programmable bus-hold on all I/Os. It is used in PCI-compliant interface logic, legacy system glue logic replacement, and industrial control state machines.
For engineers reviewing the CY37256P208-83NXC datasheet, CY37256P208-83NXC pinout, CY37256P208-83NXC application, or CY37256P208-83NXC equivalent, key selection criteria include macrocell count, tPD/fMAX speed bin, I/O count per package, JTAG ISR capability, and 5V/3.3V I/O level compatibility with VCCO configuration.
Technical Context
The CY37256P208-83NXC implements a modular architecture with multiple logic blocks interconnected via a fully global Programmable Interconnect Matrix (PIM), eliminating route-dependent timing variations. 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 four global synchronous clocks (CLK0–CLK3) plus one asynchronous product term clock (PTCLK), with programmable polarity per clock and per logic block. All I/Os feature programmable slew rate (fast/slow) and bus-hold capability, enabling robust noise immunity and unconnected pin handling in bus-interface applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Macrocells | 256 - Provides scalable logic density for medium-complexity glue logic and control state machines. |
| Propagation Delay (tPD) | 83 ns - Guarantees deterministic timing for synchronous designs up to 154 MHz fMAX. |
| I/O Pins | 192 - Supports high-pin-count interfaces such as PCI, parallel buses, and multi-channel sensor controllers. |
| Dedicated Inputs | 5 - Includes 4 configurable clock pins and 1 general-purpose input, enabling flexible clock domain management. |
| Supply Voltage | 5V VCC with 3.3V/5V I/O - VCCO pin configuration allows mixed-voltage interfacing without level shifters. |
| JTAG Interface | IEEE 1149.1-compliant - Enables in-system reprogramming and boundary-scan testing without device removal. |
| Package | 208-pin PQFP - Standard footprint compatible with automated PCB assembly and thermal management for industrial use. |
Pinout & Package
Package: 208-pin Plastic Quad Flat Pack (PQFP), 28 × 28 mm body, 0.5 mm pitch, JEDEC MS-026AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TCK, TMS, TDI, TDO | JTAG Test Access Port | Enable IEEE 1149.1 boundary scan and in-system reprogramming without external programming hardware. |
| CLK0–CLK3 | Dedicated Clock Inputs | Four independent synchronous clock sources per logic block; each supports programmable polarity for rising/falling edge triggering. |
| VCCO[0–n] | I/O Power Supply | Configures output voltage level: 5V for TTL compatibility or 3.3V for JEDEC CMOS levels and 5V-tolerant operation. |
| GND / VCC | Power Distribution | Multiple GND/VCC pairs minimize switching noise and ensure stable core voltage across high-speed macrocell operation. |
| I/O[0–191] | Programmable Bidirectional Pin | Each supports bus-hold, slew-rate control, and configurable direction (input/output/bidirectional) per macrocell assignment. |
Key Features
| Feature | Design Value |
|---|---|
| In-System Reprogrammable (ISR™) | Logic updates performed in-circuit via JTAG without changing pinout or timing behavior-enables field firmware patches and design iteration. |
| Intelligent Product Term Allocator | Dynamically assigns 0–16 product terms per macrocell and enables sharing across groups of 4 macrocells-maximizes logic utilization without performance penalty. |
| Flexible Clocking Architecture | Four global synchronous clocks + one asynchronous product term clock, all with polarity control-supports mixed-edge and multi-domain timing schemes. |
| Programmable Bus-Hold | Weak latch on every I/O pin maintains last valid logic state during high-Z periods-eliminates need for external pull-ups in bus arbitration and hot-swap scenarios. |
| PCI-Compliant Electrical Interface | Meets PCI Local Bus Specification electrical and timing requirements-certified for direct integration into PCI add-in cards and host bridge logic. |
Applications
| PCI Interface Glue Logic | Industrial PLC I/O Expansion |
|---|---|
|
Use Scenario: Replacing discrete TTL logic and PALs in PCI add-in cards to decode address/data cycles and manage bus arbitration. IC Role / Device Role / Timing Role: Configurable glue logic CPLD implementing PCI command decoding, READY generation, and burst termination control. Use Value: 192 I/Os support full 32-bit PCI data/address multiplexing; 83 ns tPD ensures compliance with PCI timing budgets for 33 MHz operation. |
Use Scenario: Extending digital I/O capacity in programmable logic controller backplanes with isolated field-side signal conditioning. IC Role / Device Role / Timing Role: High-reliability state machine managing opto-isolated input sampling, watchdog-triggered output latching, and serial status reporting. Use Value: Bus-hold prevents floating inputs during sensor disconnect; programmable slew rate reduces EMI in noisy factory environments. |
| Legacy System Migration | Test Equipment Control Logic |
|
Use Scenario: Modernizing aging instrumentation systems by replacing obsolete 22V10 and 16V8 PALs with field-upgradable logic. IC Role / Device Role / Timing Role: Drop-in logic replacement preserving original pin assignments while adding new test modes and calibration sequencing. Use Value: ISR capability allows post-deployment logic updates; consistent 208-pin PQFP footprint simplifies board-level redesign. |
Use Scenario: Managing trigger synchronization, channel gating, and DAC/ADC handshaking in automated test equipment (ATE) mainframes. IC Role / Device Role / Timing Role: Deterministic timing engine coordinating multi-board signal routing, sample clock distribution, and fault detection logic. Use Value: Four independent clocks enable simultaneous control of analog front-end, digital pattern generator, and communication subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD-based interface and control logic applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY37256P208-100NXC | 100 ns tPD (vs. 83 ns); same macrocell count, I/O, and package. | Lower fMAX (118 MHz vs. 154 MHz); suitable for non-critical timing paths or cost-sensitive designs. | Select when system timing margin allows relaxed propagation delay and lower power consumption is prioritized. |
| XC95288XL-10TQG144I | Xilinx CoolRunner-II 288-macrocell CPLD in 144-pin TQFP; 3.3V only; no 5V I/O tolerance. | Lacks 5V-compatible I/O and PCI compliance; requires level-shifting for legacy bus interfacing. | Choose only for new 3.3V-only designs where JTAG reprogrammability and low static power are primary drivers. |
Compared with CY37256P208-100NXC, the -83NXC delivers higher-speed deterministic timing for PCI and real-time control; compared with XC95288XL-10TQG144I, it retains 5V system interoperability and certified PCI electrical compliance-critical for drop-in legacy upgrades.
Availability
CY37256P208-83NXC is available at Aetrix Electronics and suitable for PCI interface design, industrial PLC expansion, legacy system migration, and automated test equipment requiring stable component supply and long-term manufacturability.
Supply support for CY37256P208-83NXC 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 PCI-compliant systems and legacy interface consolidation-emphasizing in-system reprogrammability and mixed-voltage I/O flexibility.
FAQ
Is CY37256P208-83NXC 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 peripherals without external level shifters.
Does this CPLD require external configuration memory?
No. CY37256P208-83NXC is electrically erasable and stores its configuration in on-chip nonvolatile EEPROM. It powers up in a known functional state without bootloading from external memory, simplifying system initialization and reducing BOM count.
Can the JTAG port be used for both programming and boundary-scan testing?
Yes. The device implements full IEEE 1149.1 boundary-scan functionality alongside ISR capability. TCK, TMS, TDI, and TDO serve dual roles: configuring the device and performing interconnect testing on assembled PCBs without physical probe access.
What is the purpose of the five dedicated input pins?
Five pins are reserved exclusively for input functions: four serve as globally routed clock inputs (CLK0–CLK3) with polarity control, and one is a general-purpose dedicated input. This eliminates contention with I/O resources and guarantees low-skew, high-fanout clock distribution across all logic blocks.
CY37256P208-83NXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- Ultra37000™
- Package/Case:
- 208-BFQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Programmable Type:
- In-System Reprogrammable™ (ISR™) CMOS
- Delay Time tpd(1) Max:
- 15 ns
- Voltage Supply - Internal:
- 4.75V ~ 5.25V
- Number of Logic Elements/Blocks:
- -
- Number of Macrocells:
- 256
- Number of Gates:
- -
- Number of I/O:
- 165
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 208-PQFP (28x28)
CY37256P208-83NXC FAQ
1.How can I place an order for CY37256P208-83NXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY37256P208-83NXC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CY37256P208-83NXC reliable?
The price and inventory of CY37256P208-83NXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY37256P208-83NXC is usually 5 days.
3.What payment methods are accepted for CY37256P208-83NXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY37256P208-83NXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY37256P208-83NXC?
CY37256P208-83NXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY37256P208-83NXC order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CY37256P208-83NXC?
For technical support, including CY37256P208-83NXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY37256P208-83NXC requirements.
6.How does Aetrix verify that CY37256P208-83NXC is sourced from the original manufacturer or authorized distributors?
All CY37256P208-83NXC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY37256P208-83NXC meets industry standards.
7.What is the process for return or replacement of CY37256P208-83NXC?
All CY37256P208-83NXC units undergo pre-shipment inspection (PSI). If there is an issue with CY37256P208-83NXC, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CY37256P208-83NXC part is unused and in its original packaging.
Return procedure for CY37256P208-83NXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY37256P208-83NXC Tags
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