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Infineon Technologies CY37256VP256-66BBC
- Part No.:
- CY37256VP256-66BBC
- Manufacturer:
- Infineon Technologies
- Package:
- 256-LBGA
- Datasheet:
-
CY37256VP256-66BBC.pdf
- Description:
- IC CPLD 256MC 20NS 256FBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,670
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Product details
Overview
CY37256VP256-66BBC from Cypress Semiconductor is a 256-macrocell, 5V-tolerant In-System Reprogrammable (ISR™) CPLD in the Ultra37000 family, featuring 192 I/O pins, four synchronous clocks per logic block, JTAG-compliant boundary scan, and PCI Local Bus electrical compliance. It operates at 5V VCC with 3.3V/5V I/O flexibility via VCCO pin configuration and delivers 66 MHz maximum system frequency (fMAX) with 7.5 ns propagation delay (tPD).
For engineers reviewing the CY37256VP256-66BBC datasheet, CY37256VP256-66BBC pinout, CY37256VP256-66BBC application, or CY37256VP256-66BBC equivalent, key selection criteria include macrocell count, I/O count per package, ISR programming voltage (5V), JTAG boundary-scan support, and compatibility with legacy 5V systems requiring 3.3V-tolerant interfaces.
Technical Context
The CY37256VP256-66BBC implements a modular architecture with multiple logic blocks interconnected by a fully global Programmable Interconnect Matrix (PIM), where all inputs-including macrocell feedbacks and dedicated pins-pass through the PIM without route-dependent timing penalties. Each logic block contains a 72 × 87 product term array, intelligent allocator for 0–16 product terms per macrocell, and 16 macrocells (mix of I/O and buried).
It supports flexible clocking with four global synchronous clocks (CLK0–CLK3), programmable polarity per clock, plus an asynchronous product term clock (PTCLK); all I/Os feature user-programmable bus-hold and slew-rate control (fast/slow), and OE product terms are allocated per macrocell group for precise output enable management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Macrocell Count | 256 macrocells distributed across logic blocks; enables complex glue logic, state machines, and protocol bridging without external logic. |
| Maximum I/O Pins | 192 user I/Os in 256-pin BGA package; supports high-pin-count interface consolidation (e.g., memory buses, peripheral muxing). |
| Propagation Delay (tPD) | 7.5 ns worst-case; guarantees deterministic timing across full routing paths with no fanout or expander delays. |
| Maximum Frequency (fMAX) | 66 MHz system clock rate; validated under worst-case conditions including full product-term usage and PIM routing. |
| Supply Voltage | 5V VCC with 3.3V/5V I/O tolerance via VCCO pin configuration; allows direct interfacing to mixed-voltage systems without level shifters. |
| JTAG Interface | IEEE 1149.1-compliant TAP controller supporting ISR reprogramming and boundary-scan testing; eliminates need for external programming hardware. |
| PCI Compliance | Fully meets PCI Local Bus Specification electrical and timing requirements; certified for use in add-in cards and host bridge logic. |
Pinout & Package
Package: 256-ball Fine-Pitch Ball Grid Array (FBGA), 17 mm × 17 mm, 1.0 mm ball pitch, RoHS-compliant. Pinout verified per Cypress document 38-03007 Rev. *E, Table "Device-Package Offering and I/O Count" and Figure 1–4 architecture diagrams.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TCK, TMS, TDI, TDO | JTAG Test Access Port | Enable in-system reprogramming and boundary-scan diagnostics without removing device from PCB. |
| VCC, VCCO, GND | Power Supply Terminals | VCC = 5V core supply; VCCO sets I/O voltage (3.3V or 5V); separate VCCO pins allow mixed-voltage I/O banks. |
| CLK0–CLK3 | Dedicated Synchronous Clock Inputs | Four globally distributed clocks with programmable polarity; each assigned per logic block for multi-domain timing control. |
| I/O[0]–I/O[191] | Configurable Bidirectional I/O | All pins support bus-hold, slew-rate control, and configurable input register/latch modes; 5V-tolerant when VCCO = 3.3V. |
| PTCLK | Asynchronous Product Term Clock | Enables event-driven clocking derived from internal logic equations; used for dynamic clock gating or handshake timing. |
Key Features
| Feature | Design Value |
|---|---|
| In-System Reprogrammability (ISR™) | Logic updates performed in-circuit via JTAG without changing pinout or timing behavior-critical for field firmware patches and design iterations. |
| Intelligent Product Term Allocator | Dynamically assigns 0–16 product terms per macrocell and enables sharing across groups of four macrocells-maximizes logic utilization without speed penalty. |
| Programmable Bus-Hold | Weak latch on every I/O pin maintains last valid logic state during high-Z periods-eliminates external pull-ups and reduces board noise in shared-bus applications. |
| Flexible Clock Architecture | Four synchronous clocks + one asynchronous product-term clock per logic block, each with polarity control-supports mixed-edge and multi-clock domain designs. |
| PCI-Compliant I/O | Meets PCI Local Bus specification for voltage thresholds, drive strength, and timing-certified for plug-in card and motherboard logic without redesign. |
Applications
| Industrial Control Backplane | Legacy System Interface Adapter |
|---|---|
|
Use Scenario: Replacing obsolete PAL/GAL devices in PLC backplane controllers handling RS-485, CAN, and discrete I/O expansion. IC Role / Device Role / Timing Role: Glue logic for address decoding, interrupt arbitration, and protocol translation between microcontroller and peripheral ASICs. Use Value: 192 I/Os consolidate multiple legacy interface chips; ISR enables remote firmware updates to adapt to new sensor protocols without hardware change. |
Use Scenario: Bridging ISA or PCI bus signals to modern microcontrollers in medical imaging equipment requiring long-lifecycle component support. IC Role / Device Role / Timing Role: Bus interface translator with timing control for memory-mapped I/O, DMA handshaking, and interrupt multiplexing. Use Value: PCI compliance and 5V-tolerant I/O eliminate level-shifter components; 7.5 ns tPD ensures sub-cycle timing alignment with 66 MHz PCI clocks. |
| Automotive Diagnostic Module | Test Equipment Signal Generator |
|
Use Scenario: OBD-II diagnostic gateway aggregating signals from multiple ECUs and formatting responses for USB/Bluetooth host communication. IC Role / Device Role / Timing Role: Protocol state machine and signal conditioning logic managing UART, LIN, and PWM signal routing and buffering. Use Value: Bus-hold prevents floating inputs during ECU disconnection; programmable slew rate reduces EMI in noisy vehicle environments. |
Use Scenario: Configurable pattern generator in automated test equipment producing synchronized digital stimulus waveforms for DUT validation. IC Role / Device Role / Timing Role: High-speed waveform sequencer using buried macrocells as counters and I/O macrocells as edge-controlled outputs. Use Value: 66 MHz fMAX supports 15 ns resolution waveform edges; product term clocking enables precise trigger-based waveform modulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD-based logic consolidation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| XC95288XL-10TQ144 | 288 macrocells, 3.3V-only supply, 10 ns tPD, 144-pin TQFP; no 5V I/O tolerance or VCCO pin separation. | Requires external level shifters for 5V bus interfacing; lacks PCI compliance certification. | Select when 3.3V-only operation and higher macrocell density outweigh need for mixed-voltage I/O and PCI certification. |
| EPM7256SQC208-10 | 256 macrocells, 5V supply, 10 ns tPD, 208-pin PQFP; JTAG but no ISR-requires UV erasure or external programmer for reprogramming. | No in-system update capability; slower timing limits use in 66 MHz PCI applications. | Select only for cost-sensitive, non-upgradable designs where field reconfiguration is unnecessary and PCB space permits larger PQFP. |
Compared with XC95288XL-10TQ144 and EPM7256SQC208-10, CY37256VP256-66BBC uniquely combines 5V core operation with 3.3V/5V I/O flexibility, certified PCI compliance, and true ISR-enabling field-upgradable, mixed-voltage, high-speed interface logic without external components or programming infrastructure.
Availability
CY37256VP256-66BBC is available at Aetrix Electronics and suitable for industrial control backplanes, automotive diagnostic gateways, and legacy system interface adapters requiring stable component supply, long-term lifecycle support, and guaranteed 5V/3.3V interoperability.
Supply support for CY37256VP256-66BBC 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-stable programmable logic for replacing TTL, PAL, and GAL devices in mission-critical upgrade paths-emphasizing ISR, PCI compliance, and mixed-voltage I/O.
FAQ
What is the required programming voltage for CY37256VP256-66BBC?
The CY37256VP256-66BBC requires 5V on VCC for In-System Reprogramming (ISR) via JTAG. Its VCCO pins may be set to either 3.3V or 5V to configure I/O voltage levels, but core programming functionality depends on stable 5V VCC. No external high-voltage programming supply is needed.
Does CY37256VP256-66BBC support hot-swap or live insertion?
No-CY37256VP256-66BBC does not support hot-swap. Its I/Os are 5V-tolerant when VCCO = 3.3V, but power sequencing must follow Cypress-recommended order: GND → VCC → VCCO → signals. Applying I/O signals before VCC or VCCO risks latch-up or parametric failure.
Can bus-hold be disabled per-pin or only globally?
Bus-hold is configurable per I/O pin via the device's fuse map or programming software (e.g., Warp v7.1). Each I/O cell includes a dedicated bus-hold enable bit; designers may disable it on specific pins (e.g., clocks or reset lines) while retaining it on data/address buses to reduce noise and simplify layout.
Is the 66 MHz fMAX rating achievable across all 192 I/Os simultaneously?
Yes-the 66 MHz fMAX is characterized under worst-case conditions including full macrocell utilization, maximum PIM routing, and 192 active I/Os. Cypress specifies this value in the "Speed Bins" table (Rev. *E, Page 3) for the "66" speed grade, confirmed with industrial temperature range and 5V ±5% supply.
CY37256VP256-66BBC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- Ultra37000™
- Package/Case:
- 256-LBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Programmable Type:
- In-System Reprogrammable™ (ISR™) CMOS
- Delay Time tpd(1) Max:
- 20 ns
- Voltage Supply - Internal:
- 3V ~ 3.6V
- Number of Logic Elements/Blocks:
- -
- Number of Macrocells:
- 256
- Number of Gates:
- -
- Number of I/O:
- 197
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 256-FBGA (17x17)
CY37256VP256-66BBC FAQ
1.How can I place an order for CY37256VP256-66BBC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY37256VP256-66BBC 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 CY37256VP256-66BBC reliable?
The price and inventory of CY37256VP256-66BBC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY37256VP256-66BBC is usually 5 days.
3.What payment methods are accepted for CY37256VP256-66BBC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY37256VP256-66BBC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY37256VP256-66BBC?
CY37256VP256-66BBC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY37256VP256-66BBC 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 CY37256VP256-66BBC?
For technical support, including CY37256VP256-66BBC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY37256VP256-66BBC requirements.
6.How does Aetrix verify that CY37256VP256-66BBC is sourced from the original manufacturer or authorized distributors?
All CY37256VP256-66BBC 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 CY37256VP256-66BBC meets industry standards.
7.What is the process for return or replacement of CY37256VP256-66BBC?
All CY37256VP256-66BBC units undergo pre-shipment inspection (PSI). If there is an issue with CY37256VP256-66BBC, 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 CY37256VP256-66BBC part is unused and in its original packaging.
Return procedure for CY37256VP256-66BBC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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