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Infineon Technologies CY7C146-25JXCT
- Part No.:
- CY7C146-25JXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
CY7C146-25JXCT.pdf
- Description:
- IC SRAM 16KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,663
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Product details
Overview
CY7C146-25JXCT from Cypress Semiconductor is a 2K × 8 dual-port static RAM configured as a slave device in master–slave memory expansion systems, supporting 16-bit+ data bus width scaling with CY7C136/CY7C136A masters. It features true dual-port asynchronous operation, 25 ns maximum access time, BUSY input for arbitration, and operates at 5 V ±10% over industrial temperature (–40 °C to +85 °C). Used in multiprocessor cache buffers and DSP shared-memory subsystems.
For engineers reviewing the CY7C146-25JXCT datasheet, CY7C146-25JXCT pinout, CY7C146-25JXCT application, or CY7C146-25JXCT equivalent, key selection criteria include BUSY-input arbitration compatibility, 52-pin PLCC/PQFP package fit, 25 ns timing compliance, and low-power standby current (35 mA max) in industrial environments.
Technical Context
The CY7C146-25JXCT implements fully independent left/right port control logic with separate CE, R/W, and OE pins per port, enabling concurrent read/write operations on distinct addresses without contention. Its BUSY input synchronizes with the master's open-drain BUSY output to stall port access during address collisions.
It supports automatic power-down per port via CE assertion and includes interrupt flag (INT) handling on 52-pin packages-INT acts as a port-to-port communication signal triggered by writes to dedicated locations (7FFH left, 7FEH right). The device uses 0.65 µm CMOS process for optimized speed–power tradeoff.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 8 = 16,384 bits; enables byte-wide dual-access in shared-memory architectures |
| Access Time (tRC) | 25 ns maximum; ensures deterministic latency for real-time DSP or bit-slice processor interfaces |
| Supply Voltage | 5 V ±10%; compatible with standard TTL/CMOS logic rails and legacy industrial power domains |
| Operating Temperature | –40 °C to +85 °C; qualified for industrial-grade embedded control and communications equipment |
| Standby Current (ISB1) | 35 mA maximum (both ports disabled); reduces idle power in always-on multiport memory subsystems |
| BUSY Function | Input-only; accepts active-low arbitration signal from CY7C136/CY7C136A master to prevent simultaneous access conflicts |
| Package Type | 52-pin PLCC (JXCT suffix); surface-mount compatible with automated assembly and thermal cycling reliability |
Pinout & Package
Package: 52-pin Plastic Leaded Chip Carrier (PLCC), JEDEC MS-026AC compliant, lead-free (Pb-free) variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 48) | Power supply | +5 V core and I/O supply; bypassing required near pin for noise immunity |
| GND (Pin 24) | Ground reference | Common return path for all ports; must be low-impedance for signal integrity |
| CEL, CER | Chip enable (left/right) | Active-low per-port enable; controls power-down and memory selection independently |
| R/WL, R/WR | Read/write control (left/right) | High = read, low = write; determines direction of data flow on I/O pins |
| OEL, OER | Output enable (left/right) | Active-low; places I/O pins in high-impedance state when deasserted |
| A0L–A10L, A0R–A10R | Address inputs (left/right) | 11-bit address bus per port; selects one of 2K locations (000H–7FFH) |
| I/O0L–I/O7L, I/O0R–I/O7R | Data I/O (left/right) | Bidirectional 8-bit data bus per port; shares pins for read and write |
| BUSYL, BUSYR | BUSY input (left/right) | Active-low arbitration input; driven by master's open-drain BUSY output with pull-up |
| INTL, INTR | Interrupt flag (left/right) | Open-drain output; signals inter-port event (e.g., write to 7FFH/7FEH); requires pull-up |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Enables simultaneous, independent access to any memory location by two processors or peripherals without internal arbitration logic |
| Master–slave expandability | Supports 16-bit+ word width via parallel connection with CY7C136/CY7C136A master; eliminates external glue logic |
| Per-port power-down control | Reduces system standby power by disabling unused ports while retaining data retention in active ports |
| Hardware arbitration interface | BUSY input allows cycle-stalling during address collision-critical for deterministic real-time response in multiprocessor systems |
| Dedicated interrupt signaling | INT pins provide hardware-assisted inter-processor communication using reserved memory-mapped trigger addresses (7FFH/7FEH) |
Applications
| DSP Shared Memory Buffer | Multiprocessor Cache Coherency |
|---|---|
|
Use Scenario: Two TMS320C6000-series DSPs share real-time sensor data and intermediate computation results via common memory space. IC Role / Device Role / Timing Role: Slave dual-port RAM provides synchronized, conflict-free access to 2K × 8 buffer space; BUSY input enforces deterministic arbitration during concurrent address requests. Use Value: Eliminates software-based semaphores and reduces inter-processor latency by up to 40% versus single-port SRAM with bus arbitration logic. |
Use Scenario: Dual-MIPS microcontrollers implement cache coherency protocol using shared tag/data memory for instruction and data caching. IC Role / Device Role / Timing Role: CY7C146-25JXCT serves as coherent memory backplane; INT flags signal cache line invalidation events between cores. Use Value: Enables hardware-triggered cache flush without polling, reducing coherency overhead by 22% in real-time control loops. |
| Bit-Slice Processor Interconnect | Industrial PLC Data Exchange Module |
|
Use Scenario: Four AMD 2901 bit-slice ALUs share operand and result registers through a centralized memory bank. IC Role / Device Role / Timing Role: Acts as synchronous register file extension; 25 ns access aligns with 40 MHz ALU clock domain via pipelined handshake. Use Value: Supports full 32-bit word throughput across four ALUs without wait states or external latch synchronization. |
Use Scenario: Programmable Logic Controller exchanges I/O status and motion control parameters between CPU and fieldbus interface ASIC. IC Role / Device Role / Timing Role: Provides deterministic, non-blocking data exchange channel; BUSY input prevents register corruption during cyclic scan interruptions. Use Value: Guarantees sub-100 µs worst-case data transfer latency for safety-critical motion control commands. |
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 | 3.3 V supply, 25 ns access, 2K × 8, but lacks BUSY input and master–slave expansion capability | Requires level-shifting and external arbitration logic for 5 V systems; not drop-in compatible with CY7C136-based designs | Select only if migrating to 3.3 V infrastructure and redesigning arbitration layer |
| ISSI IS61LV25616AL-25TQLI | 256K × 16 organization, 3.3 V, no BUSY/INT pins; asynchronous dual-port but no hardware arbitration support | Higher density but incompatible pinout and voltage; cannot replace CY7C146 in existing master–slave topologies | Consider for greenfield 3.3 V designs requiring larger memory, not for CY7C132/136 legacy upgrades |
Compared with IDT70V25L25PF and IS61LV25616AL-25TQLI, CY7C146-25JXCT uniquely delivers 5 V-compatible BUSY-input arbitration and seamless integration with CY7C136 masters-enabling cost-effective, low-risk expansion of legacy 8-bit dual-port systems without redesigning control logic or power delivery.
Availability
CY7C146-25JXCT is available at Aetrix Electronics and suitable for industrial PLCs, DSP-based motor drives, bit-slice computing modules, and multiprocessor communication gateways requiring stable component supply across extended product lifecycles.
Supply support for CY7C146-25JXCT 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 solutions for industrial, automotive, and communications markets.
CY7C146 belongs to Cypress's legacy dual-port SRAM product line, designed specifically for deterministic, low-latency shared-memory interconnects in multiprocessor and digital signal processing systems.
FAQ
Is CY7C146-25JXCT pin-compatible with CY7C142-25JXCT?
Yes-CY7C146-25JXCT and CY7C142-25JXCT share identical 52-pin PLCC pinouts, electrical specifications, and functional behavior. Both are slave dual-port SRAMs with BUSY input and INT output. The primary distinction is that CY7C146 includes enhanced interrupt logic per the datasheet revision history, but pin-level replacement is fully supported.
Does CY7C146-25JXCT support 3.3 V operation?
No-CY7C146-25JXCT is specified only for 5 V ±10% operation (4.5 V to 5.5 V). Its input thresholds (VIH = 2.2 V, VIL = 0.8 V) and output drive strength are optimized for TTL/5 V CMOS logic families. Operating below 4.5 V may cause timing violations or data retention failure.
What is the function of the BUSY pin on CY7C146-25JXCT?
BUSY is an active-low input used exclusively for hardware arbitration. When asserted by a master device (e.g., CY7C136), it forces the CY7C146 to stall its current access cycle until BUSY deasserts-preventing simultaneous writes to the same address. It requires an external pull-up resistor and is not internally driven.
Can CY7C146-25JXCT operate without a master device?
Yes-it functions as a standalone 2K × 8 dual-port SRAM with full read/write capability on both ports. However, BUSY arbitration and INT-based inter-port signaling require connection to a compatible master (CY7C136/CY7C136A) or external logic; standalone use omits those features but retains all basic memory functionality.
CY7C146-25JXCT 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-PLCC (19.13x19.13)
CY7C146-25JXCT FAQ
1.How can I place an order for CY7C146-25JXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C146-25JXCT 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 CY7C146-25JXCT reliable?
The price and inventory of CY7C146-25JXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C146-25JXCT is usually 5 days.
3.What payment methods are accepted for CY7C146-25JXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C146-25JXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C146-25JXCT?
CY7C146-25JXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C146-25JXCT 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 CY7C146-25JXCT?
For technical support, including CY7C146-25JXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C146-25JXCT requirements.
6.How does Aetrix verify that CY7C146-25JXCT is sourced from the original manufacturer or authorized distributors?
All CY7C146-25JXCT 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 CY7C146-25JXCT meets industry standards.
7.What is the process for return or replacement of CY7C146-25JXCT?
All CY7C146-25JXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C146-25JXCT, 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 CY7C146-25JXCT part is unused and in its original packaging.
Return procedure for CY7C146-25JXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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