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Infineon Technologies CY7C024-25AXI
- Part No.:
- CY7C024-25AXI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
CY7C024-25AXI.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,242
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Product details
Overview
CY7C024-25AXI from Cypress Semiconductor is a 4K × 16-bit true dual-port static RAM with independent left/right ports, on-chip arbitration logic, semaphores, and INT/BUSY flags. It operates at 5 V ±10%, supports 25 ns access time, delivers 150 mA typical active current, and targets interprocessor communication and video buffer applications in industrial temperature range (–40°C to +85°C).
For engineers reviewing the CY7C024-25AXI datasheet, CY7C024-25AXI pinout, CY7C024-25AXI application, or CY7C024-25AXI equivalent, key selection criteria include dual-port contention resolution timing (tPS = 10 ns), semaphore latch behavior, master/slave expandability via M/S pin, and PLCC-84 package compatibility with legacy board layouts.
Technical Context
The CY7C024-25AXI implements fully asynchronous dual-port access with separate CE/R/W/OE controls per port and hardware-based arbitration for simultaneous address matches. Its BUSY flag asserts within tBLA = 8 ns of address match or tBLC = 10 ns after CE assertion, ensuring deterministic port prioritization during contention.
It integrates eight dedicated semaphore latches accessible via SEM pin (not memory-mapped), where write to I/O0L sets token state and read returns latched value across all 16 data lines. The M/S pin configures BUSY as output (master) or input (slave), enabling 32-bit expansion without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16-bit (65,536 bits total), two independent address/data paths |
| Access Time | 25 ns maximum - defines minimum cycle time for reliable read/write under industrial temp |
| Supply Voltage | 5 V ±10% - requires stable 4.5–5.5 V rail; not compatible with 3.3 V systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and communications hardware |
| Active Current | 150 mA typical - determines thermal budget and power supply sizing for sustained dual-port operation |
| Standby Current | 30 mA typical (ISB1) - enables low-power idle states when CE is deasserted per port |
| Arbitration Timing | tPS = 10 ns - minimum separation required between port address assertions to avoid unpredictable BUSY resolution |
Pinout & Package
Package: 84-pin Plastic Leaded Chip Carrier (PLCC), RoHS-compliant, surface-mount, 24.2 mm × 24.2 mm footprint with J-lead configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left/Right) | Independent port activation; deassertion triggers automatic power-down per port |
| R/WL / R/WR | Read/Write Control (Left/Right) | Edge-triggered write enable; rising edge initiates write with tSD = 8 ns setup requirement |
| OEL / OER | Output Enable (Left/Right) | Controls tri-state of I/O bus; must be asserted with CE for valid read access |
| SEML / SEMR | Semaphore Enable (Left/Right) | Activates semaphore latch access mode; overrides CE function for token management |
| BUSYL / BUSYR | Busy Flag (Left/Right) | In master mode: output indicating local port lost arbitration; in slave mode: input from master's BUSY |
| INTL / INTR | Interrupt Flag (Left/Right) | Open-drain output signaling mailbox write (address FFE/FFF); reset by reading mailbox |
| M/S | Master/Slave Select | High = BUSY pins become outputs (master); Low = BUSY pins become inputs (slave) |
| A0L–A11L / A0R–A11R | Address Inputs (Left/Right) | 12-bit address bus per port; no A12 - confirms 4K (2¹²) depth, not 8K variant |
| I/O0L–I/O15L / I/O0R–I/O15R | Data Bus (Left/Right) | 16-bit bidirectional data path per port; UB/LB pins enable byte-select writes |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables concurrent read from same location on both ports - eliminates need for shadow RAM or software synchronization |
| On-chip arbitration logic | Resolves simultaneous access conflicts in hardware with guaranteed tBLA/tBLC timing - removes arbitration firmware overhead |
| Dedicated 8-semaphore latches | Hardware-managed resource locking with atomic set/read; prevents race conditions in multiprocessor shared-memory tasks |
| Port-to-port interrupt mailbox | Uses highest two memory addresses (FFE/FFF) for deterministic message passing - avoids polling latency in real-time systems |
| Master/slave expandability | M/S pin configures device for 32-bit wide memory without external glue logic or discrete bus transceivers |
Applications
| Industrial PLC Backplane Buffer | Real-Time Video Frame Buffer |
|---|---|
Use Scenario: Two independent CPU modules exchange sensor data and control commands over a shared memory region on a programmable logic controller backplane. IC Role / Device Role / Timing Role: Dual-port SRAM acts as non-blocking interprocessor communication channel with hardware arbitration preventing data corruption during concurrent access. Use Value: Eliminates software mutex overhead and guarantees sub-25 ns response latency for safety-critical I/O updates. | Use Scenario: Graphics processor writes rendered frame data while display controller reads prior frame for scanout - requiring zero-frame-latency buffering. IC Role / Device Role / Timing Role: Acts as ping-pong frame buffer with independent read/write ports synchronized via BUSY/INT handshake. Use Value: Enables continuous 60 Hz video output without tearing or dropped frames, even during partial frame updates. |
| Multiprocessor Telecommunications Node | Dual-Core DSP Co-Processing Interface |
Use Scenario: Baseband and protocol stack processors share status tables and packet buffers in a cellular base station unit operating in harsh thermal environments. IC Role / Device Role / Timing Role: Provides temperature-hardened (–40°C to +85°C), low-jitter shared memory with semaphore-controlled resource allocation. Use Value: Ensures deterministic inter-core messaging under thermal stress, meeting 3GPP timing compliance for handover processing. | Use Scenario: Two DSP cores perform parallel audio codec execution - one handles encoding, the other decoding - sharing filter coefficients and metadata. IC Role / Device Role / Timing Role: Serves as low-latency coefficient exchange buffer with INT-driven notification of parameter updates. Use Value: Reduces inter-core synchronization delay to <100 ns, enabling real-time adaptive noise cancellation with <50 μs loop latency. |
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 | 4K × 16, 25 ns, 3.3 V supply, 84-pin PLCC - lacks M/S pin and integrated semaphores | Requires external arbitration logic and level-shifting for 5 V systems; no mailbox interrupt support | Select only if migrating to 3.3 V architecture and implementing custom semaphore firmware |
| CY7C028-25AC | 8K × 16, 25 ns, 5 V, 100-pin TQFP - deeper memory but incompatible pinout and package | Not drop-in replaceable; requires PCB redesign and layout changes for larger footprint and different signal routing | Choose only when memory depth > 4K is required and board revision is feasible |
Compared with IDT70V25L25PF and CY7C028-25AC, CY7C024-25AXI uniquely combines industrial-temp 5 V operation, PLCC-84 compatibility, hardware semaphores, and master/slave expandability - making it optimal for legacy-replacement and cost-sensitive dual-processor designs where pin-for-pin fit and minimal firmware change are critical.
Availability
CY7C024-25AXI is available at Aetrix Electronics and suitable for industrial PLC backplanes, real-time video frame buffers, telecommunications baseband modules, and dual-core DSP interfaces requiring stable component supply across extended temperature ranges.
Supply support for CY7C024-25AXI 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-reliability memory, microcontrollers, and connectivity solutions for industrial and automotive markets.
The CY7C024 series belongs to Cypress' legacy dual-port SRAM product line, designed specifically for deterministic interprocessor communication in ruggedized embedded systems where hardware arbitration and mailbox interrupts reduce software complexity.
FAQ
What is the function of the M/S pin on CY7C024-25AXI?
The M/S (Master/Slave) pin configures the device's BUSY signal behavior: when HIGH, BUSY pins act as outputs (master mode), signaling arbitration results to external slaves; when LOW, BUSY pins become inputs (slave mode), accepting arbitration signals from a master device. This enables seamless 32-bit memory expansion without external logic.
How do the semaphore latches operate in CY7C024-25AXI?
The eight semaphore latches are accessed via SEM pin assertion (with CE held HIGH). Writing '0' to I/O0L locks the semaphore for the left port; reading returns latched state across all 16 I/O lines. Only the side holding '0' may modify the latch - enabling atomic resource ownership transfer without software polling or race conditions.
Can CY7C024-25AXI interface directly with 3.3 V logic systems?
No. CY7C024-25AXI requires 5 V ±10% supply and has TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max), but its outputs swing to 5 V levels. Direct connection to 3.3 V-only I/O may damage receivers; level-shifting circuitry or voltage-tolerant buffers are mandatory for mixed-voltage interfacing.
What memory addresses are used for interrupt mailbox functionality?
The interrupt mailbox uses the two highest addresses in the 4K space: address 0xFFE (hex) serves as the left port's mailbox (writing here asserts INTR), and 0xFFF serves as the right port's mailbox (writing here asserts INTL). Reading either mailbox resets its respective interrupt flag, and the message content is user-defined.
CY7C024-25AXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 64Kbit
- Memory Organization:
- 4K x 16
- 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:
- 100-TQFP (14x14)
CY7C024-25AXI FAQ
1.How can I place an order for CY7C024-25AXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C024-25AXI 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 CY7C024-25AXI reliable?
The price and inventory of CY7C024-25AXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C024-25AXI is usually 5 days.
3.What payment methods are accepted for CY7C024-25AXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C024-25AXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C024-25AXI?
CY7C024-25AXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C024-25AXI 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 CY7C024-25AXI?
For technical support, including CY7C024-25AXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C024-25AXI requirements.
6.How does Aetrix verify that CY7C024-25AXI is sourced from the original manufacturer or authorized distributors?
All CY7C024-25AXI 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 CY7C024-25AXI meets industry standards.
7.What is the process for return or replacement of CY7C024-25AXI?
All CY7C024-25AXI units undergo pre-shipment inspection (PSI). If there is an issue with CY7C024-25AXI, 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 CY7C024-25AXI part is unused and in its original packaging.
Return procedure for CY7C024-25AXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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