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Infineon Technologies CY7C136E-25JXIT
- Part No.:
- CY7C136E-25JXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
CY7C136E-25JXIT.pdf
- Description:
- IC SRAM 16KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,674
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Product details
Overview
CY7C136E-25JXIT from Cypress Semiconductor is a 2K × 8 (2048 × 8-bit) true dual-port static RAM with independent left/right ports, 25 ns access time, 5 V supply, and integrated BUSY/INT arbitration flags. It enables simultaneous read access to the same memory location and supports cache buffering in multiprocessor DSP systems.
For engineers reviewing the CY7C136E-25JXIT datasheet, CY7C136E-25JXIT pinout, CY7C136E-25JXIT application, or CY7C136E-25JXIT equivalent, key selection criteria include dual-port arbitration timing (tBLA ≤ 20 ns), CMOS-level standby current (ISB3 = 0.05 mA), and 52-pin PQFP package compatibility with legacy PLCC footprints.
Technical Context
This device implements fully asynchronous dual-port operation with separate CE/R/W/OE controls per port and push-pull BUSY/INT outputs requiring no external pull-ups. Address lines A0–A10 are shared between ports, supporting 2K × 8 organization with identical left/right addressing.
The arbitration logic detects concurrent access to the same address and asserts BUSY within 20 ns; INT flags support inter-port communication via dedicated interrupt locations (7FEH for left port, 7FFH for right port in 2K mode). Power-down is independently controlled per port via CE pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 8 (2048 words × 8 bits), enabling 16 KB shared data buffer space |
| Access Time | 25 ns maximum - defines minimum read cycle time (tRC) for synchronous system integration |
| Supply Voltage | 5 V ±10% - compatible with legacy TTL/CMOS logic families without level shifting |
| Standby Current (ISB3) | 0.05 mA typical with CMOS-level inputs - enables ultra-low-power idle states in battery-backed systems |
| BUSY Response Time | tBLA ≤ 20 ns - ensures rapid conflict detection during high-frequency port contention |
| Interrupt Location | Right port reads 7FFH, left port reads 7FEH - fixed hardware-mapped addresses for reliable inter-port signaling |
| Operating Temperature | –40 °C to +85 °C industrial grade - validated for embedded control and industrial automation environments |
Pinout & Package
Package: 52-pin plastic quad flat package (PQFP), Pb-free, 10 mm × 10 mm body, 0.65 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Independent port activation; drives automatic power-down when deasserted |
| R/WL / R/WR | Read/Write Control (Left / Right) | Active-low signal defining data direction per port; overlaps with CE to initiate writes |
| OEL / OER | Output Enable (Left / Right) | Controls tri-state output drivers; enables bus sharing without external buffers |
| A0L–A10L / A0R–A10R | Address Inputs (Left / Right) | Shared 11-bit address bus (A0–A10) for 2K addressing; identical mapping on both sides |
| I/O0L–I/O7L / I/O0R–I/O7R | Data Bus (Left / Right) | Bidirectional 8-bit data paths; electrically isolated but functionally mirrored |
| BUSYL / BUSYR | Busy Flag Output (Left / Right) | Push-pull active-high signal indicating concurrent access to same address; no pull-up required |
| INTL / INTR | Interrupt Flag Output (Left / Right) | Push-pull active-high flag for inter-port notification; tied to fixed address reads (7FEH/7FFH) |
| VCC / GND | Power / Ground | Single 5 V supply; decoupling required per JEDEC standards for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Enables simultaneous independent reads/writes to any memory location without arbitration overhead |
| Hardware BUSY arbitration | Detects same-address contention in ≤20 ns and asserts push-pull BUSY output-no software polling needed |
| Dedicated interrupt addressing | Fixed 7FEH (left) and 7FFH (right) locations eliminate configuration registers and reduce firmware complexity |
| Per-port power management | Independent CE-controlled power-down reduces total system standby current to 0.05 mA (both ports) |
| Pb-free 52-pin PQFP | RoHS-compliant footprint compatible with automated SMT assembly and reflow profiles |
Applications
| DSP Cache Buffering | Multiprocessor Shared Memory |
|---|---|
|
Use Scenario: Two TMS320C6000 DSP cores share real-time sensor data via common memory space. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-wait-state shared buffer with hardware arbitration preventing data corruption during concurrent access. Use Value: Eliminates need for external semaphores or software locks; 25 ns access enables full utilization of 100+ MHz DSP bus clocks. |
Use Scenario: Master microcontroller and slave FPGA exchange command/status packets in industrial PLC backplane. IC Role / Device Role / Timing Role: Acts as handshake-free inter-processor mailbox using INT flags and fixed interrupt addresses. Use Value: Reduces inter-processor latency to ≤25 ns (tWINS), enabling deterministic sub-10 µs message turnaround. |
| Bit-Slice Processor Interconnect | Legacy System Memory Upgrade |
|
Use Scenario: 4-bit ALU slices use shared instruction/data memory in vintage minicomputer emulation. IC Role / Device Role / Timing Role: Provides synchronized dual-access memory with BUSY-driven stall signaling to coordinate slice execution. Use Value: Enables cycle-accurate replication of 1970s bit-slice architectures without custom ASICs or glue logic. |
Use Scenario: Replacing obsolete 2K×8 dual-port RAMs (e.g., IDT7133) in avionics display controllers. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement with identical 52-pin PQFP footprint and 25 ns timing. Use Value: Maintains existing PCB layout and timing margins while adding RoHS compliance and extended temperature support. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7133LA25YG | 2K × 8, 25 ns, 5 V, 52-pin PQFP - identical speed/package but higher ISB3 (0.5 mA) | Lacks dedicated interrupt address mapping; requires external logic for inter-port signaling | Prefer when only BUSY arbitration is needed and lower standby current is not critical |
| ISSI IS61LV25616AL-25TQLI | 256K × 16, 25 ns, 3.3 V - larger density but incompatible voltage and bus width | Requires level shifters and bus-width adaptation; no native BUSY/INT flags | Select only when migrating to 3.3 V systems and redesigning interface logic |
Compared with IDT7133LA25YG and IS61LV25616AL-25TQLI, CY7C136E-25JXIT uniquely delivers 0.05 mA CMOS standby current, hardware-integrated INT flag addressing, and 5 V compatibility - making it optimal for power-constrained industrial upgrades where pin and function compatibility are mandatory.
Availability
CY7C136E-25JXIT is available at Aetrix Electronics and suitable for DSP cache buffering, multiprocessor shared memory, and bit-slice processor interconnect applications requiring stable component supply across extended temperature ranges.
Supply support for CY7C136E-25JXIT 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) designs high-reliability memory and programmable solutions for industrial, automotive, and communications infrastructure.
CY7C136E belongs to the legacy dual-port SRAM product line engineered specifically for deterministic, low-latency inter-processor communication in real-time embedded systems.
FAQ
What is the difference between CY7C136E-25JXIT and CY7C131E-25JXIT?
CY7C136E-25JXIT provides 2K × 8 (2048 × 8-bit) memory organization with A0–A10 addressing, while CY7C131E-25JXIT is 1K × 8 (1024 × 8-bit) with A0–A9. Both share identical 25 ns access time, pinout, and feature set including BUSY/INT flags and power-down modes.
Does CY7C136E-25JXIT require external pull-up resistors on BUSY or INT pins?
No. BUSYL, BUSYR, INTL, and INTR are push-pull outputs per datasheet Note 2 and Note 3. External pull-ups are unnecessary and may cause excessive current draw or signal integrity issues.
Can both ports perform simultaneous writes to different addresses?
Yes. The device allows independent write operations to distinct addresses on left and right ports. Simultaneous writes to the same address trigger BUSY assertion and are blocked until arbitration resolves - ensuring data coherency without external logic.
Is the 52-pin PQFP package of CY7C136E-25JXIT compatible with the 52-pin PLCC footprint?
No. While both packages have 52 pins and share identical signal assignments, PQFP uses gull-wing leads and planar mounting, whereas PLCC uses J-leads and requires different stencil design, reflow profile, and PCB pad layout - mechanical adaptation is required for substitution.
CY7C136E-25JXIT 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:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 25ns
- Access Time:
- 25 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-PLCC (19.13x19.13)
CY7C136E-25JXIT FAQ
1.How can I place an order for CY7C136E-25JXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C136E-25JXIT 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 CY7C136E-25JXIT reliable?
The price and inventory of CY7C136E-25JXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C136E-25JXIT is usually 5 days.
3.What payment methods are accepted for CY7C136E-25JXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C136E-25JXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C136E-25JXIT?
CY7C136E-25JXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C136E-25JXIT 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 CY7C136E-25JXIT?
For technical support, including CY7C136E-25JXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C136E-25JXIT requirements.
6.How does Aetrix verify that CY7C136E-25JXIT is sourced from the original manufacturer or authorized distributors?
All CY7C136E-25JXIT 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 CY7C136E-25JXIT meets industry standards.
7.What is the process for return or replacement of CY7C136E-25JXIT?
All CY7C136E-25JXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C136E-25JXIT, 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 CY7C136E-25JXIT part is unused and in its original packaging.
Return procedure for CY7C136E-25JXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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