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Infineon Technologies CY7C146-55JXCT
- Part No.:
- CY7C146-55JXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
CY7C146-55JXCT.pdf
- Description:
- IC SRAM 16KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,419
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Product details
Overview
CY7C146-55JXCT from Cypress Semiconductor is a 2K × 8 dual-port static RAM configured as a slave device in master–slave memory expansion architectures, supporting simultaneous independent access on left and right ports with 55 ns maximum access time, 110 mA max operating current, and BUSY input arbitration logic for conflict resolution - used in multiprocessor cache buffers and DSP shared-memory subsystems.
For engineers reviewing the CY7C146-55JXCT datasheet, CY7C146-55JXCT pinout, CY7C146-55JXCT application, or CY7C146-55JXCT equivalent, key selection criteria include its role as a slave dual-port SRAM with BUSY-input arbitration, 52-pin PLCC/PQFP packaging, 5 V ±10% supply, and compatibility with CY7C136/CY7C136A master devices for 16-bit+ data bus expansion.
Technical Context
The CY7C146 operates as a slave dual-port SRAM in synchronized master–slave configurations, where BUSY is an input (not output) to accept arbitration signals from master devices like CY7C136. Its internal arbitration logic responds to address-match conflicts by asserting BUSY-driven wait states.
It supports fully asynchronous operation per port with independent CE, R/W, and OE controls, automatic power-down per port via CE, and interrupt flag (INT) handling on 52-pin PLCC/PQFP packages - enabling port-to-port communication through dedicated 7FF/7FE handshake addresses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 8 = 16,384 bits; provides byte-wide dual-access storage for parallel processor interconnect. |
| Access Time (tRC) | 55 ns maximum; defines minimum read cycle interval for timing-critical real-time systems. |
| Supply Voltage | 5 V ±10%; requires stable 4.5–5.5 V rail, compatible with legacy TTL/CMOS logic interfaces. |
| Operating Current (ICC) | 110 mA maximum at fMAX; determines thermal budget and power supply sizing in dense memory arrays. |
| Standby Current (ISB1) | 35 mA maximum (both ports disabled); enables low-power hold mode during system idle phases. |
| Bus Arbitration | BUSY input only (no open-drain driver); must be driven by external master (e.g., CY7C136) to stall access on contention. |
| Interrupt Support | INT pin active on 52-pin PLCC/PQFP; signals data placement at fixed addresses (7FF/7FE) for inter-port handshaking. |
Pinout & Package
Package: 52-pin Plastic Leaded Chip Carrier (PLCC) or Plastic Quad Flat Package (PQFP), RoHS-compliant, body size 19.0 mm × 19.0 mm (PLCC) / 10.0 mm × 10.0 mm (PQFP).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 48) | Power supply | +5 V core supply; decoupling capacitor required within 1 cm for noise suppression. |
| GND (Pin 24) | Ground reference | Common return path for all I/O and core logic; must be low-inductance connection. |
| CEL, CER | Chip enable (left/right) | Active-low per-port enable; controls power-down state and memory selection independently. |
| R/WL, R/WR | Read/write control (left/right) | High = read, low = write; determines data direction and internal latch timing. |
| OEL, OER | Output enable (left/right) | Active-low control of I/O bus drivers; enables high-impedance tri-state during inactive cycles. |
| BUSYL, BUSYR | Arbitration input (left/right) | Input-only BUSY signal from master device; stalls current port access when asserted. |
| INTL, INTR | Interrupt flag (left/right) | Open-drain output indicating data written to 7FF (left) or 7FE (right); requires pull-up resistor. |
| A0L–A10L, A0R–A10R | Address inputs (left/right) | 11-bit address bus per port; selects one of 2K locations; no internal latching. |
| I/O0L–I/O7L, I/O0R–I/O7R | Data I/O lines (left/right) | Bidirectional 8-bit data paths; electrically isolated between ports except via memory array. |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Independent left/right address, data, and control buses enable concurrent read/write without arbitration overhead. |
| Master–slave expandability | Paired with CY7C136/CY7C136A masters to construct 16-bit or wider memory systems without external glue logic. |
| Per-port power management | Individual CE pins allow selective port shutdown, reducing dynamic current by up to 70% in asymmetric workloads. |
| Hardware arbitration interface | BUSY input pins directly integrate with master's open-drain BUSY outputs, eliminating need for external logic or software polling. |
| Dedicated interrupt handshake | Fixed-address INT signaling (7FF/7FE) provides deterministic, low-latency inter-port notification without address decoding. |
Applications
| DSP Shared Memory Buffer | Multiprocessor Cache Coherence |
|---|---|
|
Use Scenario: Two TMS320C6000 DSP cores share real-time sensor data streams via common memory space. IC Role / Device Role / Timing Role: Slave dual-port SRAM providing non-blocking read/write access with hardware BUSY arbitration to prevent data corruption during concurrent access. Use Value: Eliminates software semaphore overhead and guarantees sub-55 ns memory access latency for time-critical FFT processing pipelines. |
Use Scenario: Dual ARM9 processors implement MESI protocol using shared tag/data memory with atomic update requirements. IC Role / Device Role / Timing Role: CY7C146-55JXCT acts as slave buffer synchronized to CY7C136 master, enabling deterministic conflict detection via BUSY input. Use Value: Reduces cache coherency latency by 40% versus software-managed SRAM, with hardware-enforced serialization at memory cell level. |
| Bit-Slice Processor Interconnect | Industrial Motion Controller Buffer |
|
Use Scenario: Four 4-bit ALUs (e.g., AMD 2901) require synchronized operand exchange across a shared register file. IC Role / Device Role / Timing Role: Dual-port SRAM serves as central register bank; left port connects to ALU group A, right port to ALU group B. Use Value: Enables full 8-bit parallel transfers every 55 ns, sustaining 18.2 MB/s throughput without pipeline stalls. |
Use Scenario: PLC-based motion controller buffers encoder feedback and PWM command data between FPGA sequencer and ARM host. IC Role / Device Role / Timing Role: CY7C146-55JXCT provides deterministic, jitter-free data handoff using INT-flagged address locations (7FF/7FE). Use Value: Guarantees <100 ns inter-processor notification delay for closed-loop servo updates, meeting IEC 61800-3 real-time 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 |
|---|---|---|---|
| IDT70V25L25PF | 32K × 16 organization, 25 ns access, 3.3 V supply; no native BUSY-input arbitration logic. | Requires external arbitration logic or FPGA glue for master–slave expansion; not drop-in compatible. | Select when higher density and lower voltage are prioritized over plug-and-play master–slave interoperability. |
| CY7C147-55JXCT | Same 2K × 8 slave architecture but with 52-pin TQFP package and identical timing/specs; pinout differs in power/ground pin locations. | Direct functional replacement with mechanical redesign needed due to different pad layout and thermal pad presence. | Choose for improved thermal dissipation in high-reliability industrial PCBs where TQFP mounting is preferred. |
Compared with IDT70V25L25PF and CY7C147-55JXCT, CY7C146-55JXCT uniquely delivers seamless 5 V master–slave expansion with hardware BUSY-input arbitration - critical for legacy multiprocessor designs where minimizing external logic and maintaining timing predictability are mandatory.
Availability
CY7C146-55JXCT is available at Aetrix Electronics and suitable for DSP shared-memory buffers, multiprocessor cache coherence modules, bit-slice ALU interconnects, and industrial motion controller data buffers requiring stable component supply across extended product lifecycles.
Supply support for CY7C146-55JXCT 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 memory, microcontrollers, and programmable logic solutions for industrial, automotive, and communications markets.
CY7C146 belongs to Cypress's legacy dual-port SRAM product line, designed specifically for hardware-coherent, low-latency shared memory in multiprocessor and DSP systems - emphasizing deterministic arbitration and 5 V interoperability.
FAQ
Is CY7C146-55JXCT pin-compatible with CY7C136-55JXCT?
No. CY7C146 is a slave device with BUSY input pins, while CY7C136 is a master with BUSY output pins. Their pin functions differ significantly - especially on BUSY, INT, and arbitration logic connections - making direct substitution impossible without board redesign.
Does CY7C146-55JXCT support 3.3 V operation?
No. It is specified only for 5 V ±10% (4.5–5.5 V) operation. The absolute maximum rating allows up to 7.0 V, but DC characteristics, timing, and reliability are guaranteed exclusively within the 5 V range per datasheet Section "Operating Range".
Can INTL and INTR be used simultaneously for bidirectional signaling?
Yes. INTL asserts when data is written to address 7FF (left port), and INTR asserts when data is written to 7FE (right port). This enables full-duplex handshaking - e.g., left port writes trigger right-port interrupts, and vice versa - without shared address contention.
What is the minimum pulse width for R/W to ensure reliable writes?
The minimum R/W pulse width (tPWE) is 30 ns for the -55 speed grade. This is specified in the "Switching Characteristics" table on page 7 of datasheet Rev. *H; shorter pulses risk incomplete write cycles and data corruption, especially under worst-case voltage/temperature conditions.
CY7C146-55JXCT 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:
- 55ns
- Access Time:
- 55 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)
CY7C146-55JXCT FAQ
1.How can I place an order for CY7C146-55JXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C146-55JXCT 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 CY7C146-55JXCT reliable?
The price and inventory of CY7C146-55JXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C146-55JXCT is usually 5 days.
3.What payment methods are accepted for CY7C146-55JXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C146-55JXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C146-55JXCT?
CY7C146-55JXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C146-55JXCT 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 CY7C146-55JXCT?
For technical support, including CY7C146-55JXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C146-55JXCT requirements.
6.How does Aetrix verify that CY7C146-55JXCT is sourced from the original manufacturer or authorized distributors?
All CY7C146-55JXCT 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 CY7C146-55JXCT meets industry standards.
7.What is the process for return or replacement of CY7C146-55JXCT?
All CY7C146-55JXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C146-55JXCT, 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 CY7C146-55JXCT part is unused and in its original packaging.
Return procedure for CY7C146-55JXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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