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Infineon Technologies CY7C136A-55JXI
- Part No.:
- CY7C136A-55JXI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
CY7C136A-55JXI.pdf
- Description:
- IC SRAM 16KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,993
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Product details
Overview
CY7C136A-55JXI from Cypress Semiconductor is a 2K × 8 true dual-port static RAM with independent left/right ports, 55 ns maximum access time, 5 V ±10% supply, and industrial temperature range (–40 °C to +85 °C). It supports simultaneous reads of the same memory location, features BUSY arbitration and INT flags, and is used as a master device in 16-bit+ bus expansion systems for multiprocessor interconnects.
For engineers reviewing the CY7C136A-55JXI datasheet, CY7C136A-55JXI pinout, CY7C136A-55JXI application, or CY7C136A-55JXI equivalent, key selection criteria include dual-port arbitration timing (tBLA = 20 ns), standby current (ISB1 = 35 mA), open-drain BUSY output requiring pull-up, and compatibility with CY7C142/CY7C146 slave devices in PLCC/PQFP packages.
Technical Context
This device implements fully asynchronous dual-port SRAM architecture with separate address, data, and control buses per port (A0L–A10L/I/O0L–I/O7L/CEL/OEL/R/WL/BUSYL/INTL and mirrored right-side signals). Arbitration logic resolves contention when both ports access the same address, asserting BUSY and enabling priority-based access via CE timing.
The CY7C136A-55JXI includes automatic power-down per port controlled by CE, CMOS/TTL-compatible inputs, open-drain BUSY outputs (requiring external pull-ups), and interrupt flag generation at fixed addresses (7FFh left, 7FEh right) on 52-pin PLCC/PQFP packages - identical in function to CY7C136 but with updated process and screening.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 8 (2048 words × 8 bits); enables byte-wide dual-access without external data-width expansion |
| Access Time (tRC) | 55 ns max; defines minimum read cycle interval for reliable data capture at full speed |
| Supply Voltage | 5 V ±10%; supports standard TTL/CMOS logic interfaces without level-shifting |
| Operating Temperature | –40 °C to +85 °C; qualified for industrial embedded systems with thermal cycling requirements |
| Standby Current (ISB1) | 35 mA max (both ports disabled); determines quiescent power in system sleep modes |
| BUSY Output Type | Open-drain; requires external pull-up resistor to VCC for proper arbitration signaling |
| Interrupt Address | 7FFh (left port), 7FEh (right port); fixed locations for port-to-port notification without address decoding |
Pinout & Package
Package: 52-pin Plastic Leaded Chip Carrier (PLCC), JEDEC MS-026AC, body size 19.13 mm × 19.13 mm, 1.78 mm height, lead pitch 0.635 mm. RoHS-compliant, Pb-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 48) | Power supply | +5 V core and I/O supply; decoupling capacitor required within 1 cm |
| GND (Pin 24) | Ground reference | Common return path for all ports; must be low-inductance connection |
| CEL / CER | Chip enable (left/right) | Active-low per-port enable; controls power-down and memory selection independently |
| OEL / OER | Output enable (left/right) | Active-low per-port tri-state control; enables high-impedance I/O during arbitration |
| R/WL / R/WR | Read/write control (left/right) | High = read, low = write; initiates internal write when overlapped with CE low |
| BUSYL / BUSYR | Arbitration flag (open-drain) | Asserted low when port attempts conflicting access; requires 4.7 kΩ pull-up to VCC |
| INTL / INTR | Interrupt flag (open-drain) | Asserted low when data written to 7FFh/7FEh; used for inter-port handshaking |
| A0L–A10L / A0R–A10R | Address inputs (left/right) | 11-bit address bus per port; selects one of 2048 memory locations independently |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O bidirectional (left/right) | 8-bit parallel data path per port; high-impedance when OE or CE inactive |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port cell architecture | Enables concurrent read operations from both ports to same address without collision or delay |
| Per-port automatic power-down | Reduces ICC to ISB1 (35 mA) or ISB2 (75 mA) by asserting CE high, supporting dynamic power gating |
| Hardware arbitration with BUSY flag | Resolves port contention in real time; tBLA = 20 ns ensures fast detection of address match events |
| Dedicated interrupt generation | Fixed-address (7FFh/7FEh) INT assertion eliminates need for address decode logic in handshake protocols |
| Master/slave bus expansion support | Enables 16-bit+ word width using CY7C136A-55JXI as master with CY7C142/CY7C146 slaves via BUSY chaining |
Applications
| Real-Time DSP Buffering | Multiprocessor Shared Memory |
|---|---|
|
Use Scenario: Two DSP cores share a common coefficient lookup table while executing independent filter algorithms. IC Role / Device Role / Timing Role: Dual-port SRAM acts as contention-managed shared memory; BUSY flags prevent data corruption during simultaneous access. Use Value: Eliminates software semaphore overhead and guarantees deterministic 55 ns read latency for both cores. |
Use Scenario: ARM and FPGA subsystems exchange sensor fusion results via a synchronized mailbox region. IC Role / Device Role / Timing Role: CY7C136A-55JXI provides hardware-arbitrated memory space; INT flags signal new data availability. Use Value: Reduces inter-processor communication latency to ≤45 ns (tWINS) without CPU polling or external logic. |
| Bit-Slice Processor Interconnect | Industrial PLC Data Exchange |
|
Use Scenario: Four 4-bit ALUs share instruction cache and register file in a custom bit-slice CPU design. IC Role / Device Role / Timing Role: Acts as master dual-port RAM in 16-bit bus expansion topology with CY7C146 slaves. Use Value: Enables scalable data-path width without increasing address bus complexity or clock domain crossings. |
Use Scenario: PLC main controller and safety monitor exchange status flags and diagnostic counters in real time. IC Role / Device Role / Timing Role: Provides fault-tolerant shared memory with hardware arbitration for fail-safe state synchronization. Use Value: Guarantees atomic updates under worst-case 55 ns access, meeting IEC 61508 SIL-2 timing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C136-55JXI | Functionally identical to CY7C136A-55JXI per datasheet note 1; same pinout, timing, and electrical specs. | No functional difference; CY7C136A is revision-controlled replacement with enhanced manufacturing screening. | Select CY7C136A-55JXI for new designs requiring latest qualification and long-term supply assurance. |
| CY7C146-55JXI | Slave-only dual-port SRAM; lacks BUSY output (has BUSY input), no INT flag, and no master arbitration logic. | Requires companion master (e.g., CY7C136A) for full arbitration; used only in expanded bus configurations. | Use only as slave in 16-bit+ systems; not standalone-replaceable for CY7C136A-55JXI's master functionality. |
Compared with CY7C136-55JXI, the CY7C136A-55JXI offers identical performance but improved process consistency and lifecycle support; versus CY7C146-55JXI, it provides full master arbitration capability essential for standalone dual-processor interconnects.
Availability
CY7C136A-55JXI is available at Aetrix Electronics and suitable for real-time DSP buffering, multiprocessor shared memory, bit-slice processor interconnect, and industrial PLC data exchange requiring stable component supply across extended product lifecycles.
Supply support for CY7C136A-55JXI 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-performance memory and programmable solutions for embedded systems, with expertise in SRAM, Flash, PSoC, and interface ICs.
CY7C136A belongs to Cypress's legacy dual-port SRAM product line, engineered specifically for deterministic, contention-free memory sharing in multiprocessor, DSP, and bit-slice architectures.
FAQ
Is CY7C136A-55JXI pin-compatible with CY7C136-55JXI?
Yes - CY7C136A-55JXI is a direct functional and pin-for-pin replacement for CY7C136-55JXI, with identical package (52-pin PLCC), pinout, timing, and electrical specifications. The 'A' suffix denotes an updated wafer fabrication and screening revision, not a functional change.
What external components are required for BUSY and INT pins?
BUSYL, BUSYR, INTL, and INTR are open-drain outputs requiring external 4.7 kΩ pull-up resistors to VCC (Pin 48). No series termination or capacitors are needed; layout must minimize stub length to avoid signal integrity issues during arbitration.
Can CY7C136A-55JXI operate with mixed voltage interfaces?
No - it is strictly a 5 V ±10% device with TTL/CMOS-compatible input thresholds (VIH = 2.2 V, VIL = 0.8 V). It does not support 3.3 V or mixed-voltage I/O; level shifters are required for interfacing with lower-voltage processors or FPGAs.
How does the automatic power-down feature behave during arbitration?
Power-down is per-port and independent: asserting CEL or CER high disables that port's core logic and reduces its ICC to ISB1 (35 mA) or ISB2 (75 mA), even during BUSY assertion. The active port continues normal operation without interruption.
CY7C136A-55JXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 52-LCC (J-Lead)
- Packaging:
- Tray
- 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:
- 55ns
- Access Time:
- 55 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)
CY7C136A-55JXI FAQ
1.How can I place an order for CY7C136A-55JXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C136A-55JXI 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 CY7C136A-55JXI reliable?
The price and inventory of CY7C136A-55JXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C136A-55JXI is usually 5 days.
3.What payment methods are accepted for CY7C136A-55JXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C136A-55JXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C136A-55JXI?
CY7C136A-55JXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C136A-55JXI 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 CY7C136A-55JXI?
For technical support, including CY7C136A-55JXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C136A-55JXI requirements.
6.How does Aetrix verify that CY7C136A-55JXI is sourced from the original manufacturer or authorized distributors?
All CY7C136A-55JXI 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 CY7C136A-55JXI meets industry standards.
7.What is the process for return or replacement of CY7C136A-55JXI?
All CY7C136A-55JXI units undergo pre-shipment inspection (PSI). If there is an issue with CY7C136A-55JXI, 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 CY7C136A-55JXI part is unused and in its original packaging.
Return procedure for CY7C136A-55JXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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