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Infineon Technologies CY7C131-15JXCT
- Part No.:
- CY7C131-15JXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
CY7C131-15JXCT.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,141
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Product details
Overview
CY7C131-15JXCT from Cypress Semiconductor is a 1K × 8 true dual-port static RAM with independent left/right ports, 15 ns maximum access time, 5 V supply, and 52-pin PLCC package. It supports simultaneous reads of the same memory location, features BUSY arbitration and INT port-to-port communication flags, and operates across industrial temperature range (–40°C to +85°C) - used in multi-processor shared-memory systems and DSP cache buffers.
For engineers reviewing the CY7C131-15JXCT datasheet, CY7C131-15JXCT pinout, CY7C131-15JXCT application, or CY7C131-15JXCT equivalent, key selection criteria include dual-port arbitration timing (tBLA = 15 ns), standby current (ISB1 = 75 mA), open-drain BUSY output requiring pull-up, and compatibility with CY7C141 for 16-bit expansion.
Technical Context
This device implements fully asynchronous dual-port SRAM architecture with independent CE/R/W/OE control per port and hardware-based arbitration logic that asserts BUSY when both ports attempt concurrent access to the same address. The INT flag enables deterministic inter-port signaling via dedicated interrupt locations (3FFH left, 3FEH right).
It uses 0.65 µm CMOS process for optimized speed-power trade-off, supports automatic per-port power-down via CE assertion, and provides four distinct standby current modes (ISB1–ISB4) depending on active port count and input logic levels - critical for low-power multi-access embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 1K × 8 bits (1024 words × 8-bit data width per port) |
| Access Time | 15 ns - defines minimum read cycle time (tRC) for high-speed real-time data sharing |
| Supply Voltage | 5 V ±10% - requires stable 5 V rail; not compatible with 3.3 V logic without level translation |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade reliability in embedded control environments |
| Max Operating Current | 190 mA (commercial), 170 mA (industrial) - impacts thermal design and power budgeting |
| Standby Current (ISB1) | 75 mA (industrial) - measured with both ports disabled; determines idle power in multi-port sleep states |
| BUSY Output Type | Open-drain - mandates external pull-up resistor for proper flag signaling and arbitration resolution |
Pinout & Package
Package: 52-pin Plastic Leaded Chip Carrier (PLCC), lead-free compliant, body size 19.13 mm × 19.13 mm, JEDEC MS-026AC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low per-port enable; controls individual port power-down and I/O tri-state |
| R/WL / R/WR | Read/Write Control (Left / Right) | Active-low write strobe; high = read, low = write - defines data direction per port |
| OEL / OER | Output Enable (Left / Right) | Active-low control of output drivers; independent from CE and R/W for flexible bus management |
| A0L–A9L / A0R–A9R | Address Inputs (Left / Right) | 10-bit address bus per port; selects one of 1024 memory locations independently |
| I/O0L–I/O7L / I/O0R–I/O7R | Data Bus (Left / Right) | 8-bit bidirectional data path per port; shares pins for read/write - no separate DQ/DIN |
| BUSYL / BUSYR | Busy Flag (Left / Right) | Open-drain output indicating concurrent access conflict; requires pull-up for logic HIGH assertion |
| INTL / INTR | Interrupt Flag (Left / Right) | Open-drain output signaling valid data written to dedicated interrupt address (3FFH/3FEH) |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous, independent read/write operations on left and right ports without internal arbitration delay |
| Hardware Arbitration Logic | Detects address collision in real time and asserts BUSY within 15 ns (tBLA), preventing data corruption |
| Port-to-Port Interrupt Mechanism | Uses fixed addresses 3FFH (left) and 3FEH (right) to trigger INT flag - eliminates polling overhead in multi-core sync |
| Per-Port Power Management | CE-driven automatic power-down reduces ICC to ISB1 (75 mA) or ISB3 (15 mA) depending on input logic state |
| 16-Bit Expansion Support | Master (CY7C131) pairs with slave (CY7C141) via BUSY/INT handshake to construct wider memory interfaces |
Applications
| DSP Shared Memory Buffer | Multi-Processor Interconnect |
|---|---|
|
Use Scenario: Two DSP cores share real-time sensor data streams with minimal latency and no software coordination. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-wait-state shared memory buffer; left port serves Core A, right port serves Core B. Use Value: 15 ns access enables sub-30 ns inter-core data exchange; BUSY flag prevents race conditions during concurrent access to same address. |
Use Scenario: Asymmetric multiprocessing system where an ARM host processor offloads compute-intensive tasks to a dedicated co-processor. IC Role / Device Role / Timing Role: CY7C131-15JXCT serves as mailbox memory; INT flag signals task completion from co-processor to host. Use Value: Dedicated interrupt addresses (3FFH/3FEH) eliminate polling; 15 ns tWINS ensures <30 ns notification latency after write completion. |
| Digital Signal Cache | Bit-Slice Processor Interface |
|
Use Scenario: High-throughput FFT engine requires low-latency access to coefficient tables and intermediate results. IC Role / Device Role / Timing Role: Functions as dual-access cache memory - one port fetches coefficients, other writes partial results. Use Value: Simultaneous read/write avoids pipeline stalls; 15 ns tAA guarantees coefficient availability before next MAC cycle. |
Use Scenario: Modular bit-slice CPU design using multiple ALU slices sharing operand and result registers. IC Role / Device Role / Timing Role: Provides synchronized register file access across slice boundaries via left/right port addressing. Use Value: Hardware arbitration resolves contention without microcode intervention; tPD = 15 ns enables fast port disable during slice reconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C131A-15JXCT | Same pinout and timing, but improved AC/DC specs: lower ISB1 (65 mA vs. 75 mA), tighter tAA tolerance | Preferred for new designs targeting lower standby power; backward-compatible drop-in replacement | Select when optimizing for industrial temperature operation with reduced quiescent current. |
| CY7C141-15JXCT | 52-pin PLCC slave device; lacks BUSY output (input only), no INT output, no arbitration logic | Used only as expansion slave paired with CY7C131/CY7C131A to build 16-bit+ word width systems | Choose only when extending data bus width beyond 8 bits; cannot operate standalone as master RAM. |
Compared with CY7C131A-15JXCT, this part trades 10 mA higher standby current for broader legacy qualification; versus CY7C141-15JXCT, it provides full master functionality including arbitration and interrupt generation - essential for autonomous dual-port operation.
Availability
CY7C131-15JXCT is available at Aetrix Electronics and suitable for industrial control systems, DSP accelerators, and multi-processor interconnects requiring stable component supply, long-lifecycle support, and verified dual-port timing behavior.
Supply support for CY7C131-15JXCT 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 fabless semiconductor company specializing in memory, microcontrollers, and programmable solutions for embedded systems.
CY7C131 belongs to Cypress's legacy dual-port SRAM product line, designed specifically for deterministic, low-latency shared memory in real-time multi-processor and signal processing architectures.
FAQ
Is CY7C131-15JXCT pin-compatible with CY7C130-15JXCT?
No. CY7C131-15JXCT uses a 52-pin PLCC package, while CY7C130-15JXCT is in a 48-pin DIP package. Pin counts, physical dimensions, and pin assignments differ fundamentally - direct PCB replacement is not possible without layout revision.
What external components are required for BUSY signal operation?
A pull-up resistor (typically 4.7 kΩ to 5 V) is mandatory on each BUSY pin (BUSYL and BUSYR) because they are open-drain outputs. Without pull-up, the BUSY flag cannot assert HIGH to indicate arbitration release, causing system lockup during concurrent access.
Can CY7C131-15JXCT operate at 3.3 V?
No. The device is specified only for 5 V ±10% (4.5 V to 5.5 V) operation. Applying 3.3 V violates absolute maximum ratings and will result in undefined behavior, failed reads/writes, or permanent damage due to insufficient gate overdrive in the 0.65 µm CMOS process.
How does the INT flag get cleared after assertion?
INT is cleared automatically by reading from its dedicated address: INTL clears when location 3FFH is read via the left port, and INTR clears when location 3FEH is read via the right port. No external reset or write pulse is needed - the act of reading the interrupt location resets the flag.
CY7C131-15JXCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 52-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 15ns
- Access Time:
- 15 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-PLCC (19.13x19.13)
CY7C131-15JXCT FAQ
1.How can I place an order for CY7C131-15JXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C131-15JXCT 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 CY7C131-15JXCT reliable?
The price and inventory of CY7C131-15JXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C131-15JXCT is usually 5 days.
3.What payment methods are accepted for CY7C131-15JXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C131-15JXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C131-15JXCT?
CY7C131-15JXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C131-15JXCT 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 CY7C131-15JXCT?
For technical support, including CY7C131-15JXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C131-15JXCT requirements.
6.How does Aetrix verify that CY7C131-15JXCT is sourced from the original manufacturer or authorized distributors?
All CY7C131-15JXCT 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 CY7C131-15JXCT meets industry standards.
7.What is the process for return or replacement of CY7C131-15JXCT?
All CY7C131-15JXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C131-15JXCT, 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 CY7C131-15JXCT part is unused and in its original packaging.
Return procedure for CY7C131-15JXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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