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Infineon Technologies CY7C025-15AXC
- Part No.:
- CY7C025-15AXC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
CY7C025-15AXC.pdf
- Description:
- IC SRAM 128KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,212
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Product details
Overview
CY7C025-15AXC from Cypress Semiconductor is an 8K × 16-bit true dual-port static RAM with on-chip arbitration, semaphores, and INT/BUSY flags. It enables simultaneous asynchronous read/write access to shared memory by two independent processors or data paths, features 15 ns access time, 5 V ±10% supply, and operates across commercial temperature range (0°C to +70°C). It is used in interprocessor communication buffers and real-time video frame stores.
For engineers reviewing the CY7C025-15AXC datasheet, CY7C025-15AXC pinout, CY7C025-15AXC application, or CY7C025-15AXC equivalent, key selection criteria include dual-port arbitration behavior, semaphore latch count, M/S pin configuration for master/slave expansion, and TQFP vs PLCC package compatibility in high-density PCB layouts.
Technical Context
The CY7C025-15AXC implements fully asynchronous dual-port architecture with independent CE/R/W/OE control per port, enabling deterministic concurrent access without external synchronization logic. Its on-chip arbitration resolves address-contention events via BUSY assertion with tBLA = 8 ns and tBLC = 10 ns timing guarantees.
Semaphore logic comprises eight dedicated latches accessible via SEM pin, supporting atomic resource-locking protocols between ports; interrupt signaling uses upper two memory locations (1FFF/1FFE) as mailboxes with self-clearing on read. The M/S pin configures BUSY as output (master) or input (slave) for seamless 32-bit+ memory expansion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 16-bit (131,072 bits), enabling full-word parallel access per port without bit-slicing |
| Access Time | 15 ns maximum - supports CPU bus cycles up to 66.7 MHz in tightly coupled systems |
| Supply Voltage | 5 V ±10% - compatible with legacy TTL/CMOS logic families and industrial 5 V rails |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded control and communications equipment |
| Power Consumption | ICC = 150 mA typical active current; automatic power-down per port via CE deassertion |
| Arbitration Flags | Dual BUSY and INT signals per port - enable hardware flow control and inter-processor messaging |
| Semaphore Count | Eight independent latches - sufficient for multi-resource locking in real-time OS task coordination |
Pinout & Package
Available in 100-pin Thin Quad Plastic Flatpack (TQFP) and 84-pin Plastic Leaded Chip Carrier (PLCC); CY7C025-15AXC is specified for Pb-free TQFP packaging per datasheet Rev. *D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left/Right) | Independent port activation; deassertion places port in auto power-down mode |
| R/WL / R/WR | Read/Write Control (Left/Right) | Active-HIGH write, active-LOW read - matches standard microprocessor bus timing |
| OEL / OER | Output Enable (Left/Right) | Enables bidirectional I/O drivers only when CE is active - prevents bus contention |
| A0L–A12L / A0R–A12R | Address Inputs (Left/Right) | 13-bit addressing for 8K depth; A12 present only on CY7C025/0251 variants |
| I/O0L–I/O15L / I/O0R–I/O15R | Data Bus (Left/Right) | 16-bit parallel interface per port; UB/LB pins allow byte-selective access |
| SEML / SEMR | Semaphore Enable (Left/Right) | Activates semaphore latch access instead of memory array - requires CE HIGH |
| INTL / INTR | Interrupt Flag (Left/Right) | Open-drain output asserted when opposite port writes to mailbox address (1FFE/1FFF) |
| BUSYL / BUSYR | Busy Flag (Left/Right) | Indicates port arbitration conflict; direction (input/output) set by M/S pin state |
| M/S | Master/Slave Select | High = BUSY pins are outputs (master); Low = BUSY pins are inputs (slave) for daisy-chain expansion |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous reads from same location - eliminates need for shadow RAM or software synchronization |
| On-chip arbitration logic | Resolves address-contention within 10 ns (tBLC) - removes requirement for external priority encoder or glue logic |
| Eight semaphore latches | Hardware-accelerated resource locking - avoids race conditions in multi-threaded firmware without disabling interrupts |
| Configurable M/S pin | Supports 32-bit+ data bus expansion using multiple devices - no external master/slave logic or discrete gates required |
| Dedicated mailbox interrupt | Uses fixed upper addresses (1FFE/1FFF) for zero-overhead inter-processor messaging - no address decoding logic needed |
Applications
| Interprocessor Communication Buffer | Real-Time Video Frame Store |
|---|---|
|
Use Scenario: Two DSPs exchange control parameters and status flags in a radar signal processing subsystem. IC Role / Device Role / Timing Role: Dual-port RAM serves as shared memory with hardware arbitration, eliminating software polling loops and reducing latency to <15 ns. Use Value: Enables deterministic handshaking via semaphores and mailbox interrupts - cuts inter-core latency by >90% versus serial UART or SPI-based coordination. |
Use Scenario: Simultaneous capture and display of progressive-scan video frames in medical imaging equipment. IC Role / Device Role / Timing Role: Left port accepts pixel data from ADC pipeline; right port feeds display controller - both at full 15 ns throughput. Use Value: Eliminates frame buffer bottlenecks - supports 1080p@60 Hz with zero dropped frames due to concurrent read/write capability. |
| Industrial PLC I/O Mapping Memory | Dual-Port CAN Gateway Buffer |
|
Use Scenario: Programmable logic controller synchronizes field I/O scan cycles with HMI update cycles across separate processor domains. IC Role / Device Role / Timing Role: Acts as mirrored I/O image memory - one port updated by scan engine, other read by HMI renderer. Use Value: Ensures atomic updates via semaphore-controlled write access - prevents partial register reads during I/O scan transitions. |
Use Scenario: CAN FD gateway bridges two isolated automotive networks requiring timestamped message buffering and prioritization. IC Role / Device Role / Timing Role: Buffers incoming CAN frames on left port; schedules transmission on right port using mailbox-triggered interrupts. Use Value: Guarantees deterministic latency (<20 ns jitter) for safety-critical messages - meets ASAM MCD-2 MC timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT70V25S-15JG | 8K × 16-bit, 15 ns, JTAG-compatible, but lacks M/S pin and integrated semaphores | Requires external arbitration logic for multi-device expansion; no native mailbox interrupt | Prefer when JTAG boundary-scan testability is mandatory and system design includes custom semaphore firmware |
| ISSI IS61LV51216-15TQLI | 512K × 16-bit, 15 ns, single-port only; no BUSY/INT/SEM logic | Cannot support true concurrent access - needs external dual-port controller ASIC or FPGA logic | Select only if higher density is critical and arbitration is implemented externally in FPGA fabric |
Compared with IDT70V25S-15JG and IS61LV51216-15TQLI, the CY7C025-15AXC uniquely integrates arbitration, semaphores, and mailbox interrupts in a single 100-pin TQFP - reducing BOM count by ≥3 ICs and eliminating timing-critical external logic design effort.
Availability
CY7C025-15AXC is available at Aetrix Electronics and suitable for interprocessor communication buffers, real-time video frame stores, industrial PLC I/O mapping, and dual-port CAN gateway designs requiring stable component supply and long-term obsolescence management.
Supply support for CY7C025-15AXC 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 high-performance memory, PSoC, and connectivity solutions for industrial and embedded markets.
The CY7C02x series was designed specifically for deterministic multi-processor memory sharing - targeting applications where hardware-enforced arbitration and low-latency inter-core signaling are non-negotiable.
FAQ
What is the function of the M/S pin on CY7C025-15AXC?
The M/S (Master/Slave) pin configures BUSY signal direction: when HIGH, BUSY pins act as outputs for master-mode arbitration feedback; when LOW, they become inputs for slave-mode daisy-chaining. This enables 32-bit+ memory expansion without external logic, as confirmed in Figure 2 and Pin Definitions section of datasheet Rev. *D.
How many semaphore latches does CY7C025-15AXC provide, and how are they accessed?
CY7C025-15AXC provides eight dedicated semaphore latches, accessed by asserting SEM LOW while holding CE HIGH. Address bits A0–A2 select the latch; I/O0 carries the token value (0 = locked, 1 = free), and all 16 I/O lines reflect the latch state during read, per Table 3 and Semaphore Operation section.
Can both ports perform simultaneous reads to the same memory location?
Yes - CY7C025-15AXC supports true simultaneous reads to identical addresses without arbitration delay or BUSY assertion. This is enabled by its dual-port memory cell architecture, explicitly stated in the Features section and Logic Block Diagram on page 2 of datasheet Rev. *D.
What are the valid operating voltage and temperature ranges for CY7C025-15AXC?
CY7C025-15AXC operates at 5 V ±10% (4.5 V to 5.5 V) over the commercial temperature range of 0°C to +70°C, as specified in the Operating Range table on page 7 of datasheet Rev. *D. It is not rated for industrial (–40°C to +85°C) or extended voltage operation.
CY7C025-15AXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Bag
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 128Kbit
- Memory Organization:
- 8K x 16
- 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:
- 100-TQFP (14x14)
CY7C025-15AXC FAQ
1.How can I place an order for CY7C025-15AXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C025-15AXC 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 CY7C025-15AXC reliable?
The price and inventory of CY7C025-15AXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C025-15AXC is usually 5 days.
3.What payment methods are accepted for CY7C025-15AXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C025-15AXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C025-15AXC?
CY7C025-15AXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C025-15AXC 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 CY7C025-15AXC?
For technical support, including CY7C025-15AXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C025-15AXC requirements.
6.How does Aetrix verify that CY7C025-15AXC is sourced from the original manufacturer or authorized distributors?
All CY7C025-15AXC 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 CY7C025-15AXC meets industry standards.
7.What is the process for return or replacement of CY7C025-15AXC?
All CY7C025-15AXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C025-15AXC, 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 CY7C025-15AXC part is unused and in its original packaging.
Return procedure for CY7C025-15AXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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