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Infineon Technologies CY7C024-25AXC
- Part No.:
- CY7C024-25AXC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
CY7C024-25AXC.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,215
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Product details
Overview
CY7C024-25AXC from Cypress Semiconductor is a 4K x 16-bit true dual-port static RAM with independent left/right ports, 25 ns access time, 5 V supply, and integrated semaphore/INT/BUSY arbitration logic-used in interprocessor communication buffers and video memory coherency management.
For engineers reviewing the CY7C024-25AXC datasheet, CY7C024-25AXC pinout, CY7C024-25AXC application, or CY7C024-25AXC equivalent, key selection criteria include asynchronous dual-port timing, on-chip semaphore latch behavior, M/S master/slave expansion capability, and PLCC-84 package compatibility with legacy industrial control backplanes.
Technical Context
The device implements fully asynchronous dual-port operation with separate CE/R/W/OE controls per port, enabling concurrent read/write access to any memory location. Arbitration is handled by hardware BUSY flag generation (tBLA = 10 ns) and deterministic INT flag assertion upon mailbox write (addresses FFEh/FFFh).
Semaphore logic comprises eight dedicated latches accessible via SEM pin activation; only one port may write to a given semaphore at a time, with state mirrored across ports to enforce mutual exclusion. The M/S pin configures BUSY as output (master) or input (slave), enabling 32-bit-wide memory expansion without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16-bit (64 Kbit total), two independent address/data paths |
| Access Time | 25 ns maximum - defines minimum cycle time for non-contention reads/writes |
| Supply Voltage | 5 V ±10% - compatible with standard TTL/CMOS logic families |
| Operating Temperature | 0°C to +70°C (Commercial grade) - validated for office and lab environments |
| ICC (Typ) | 160 mA - determines power budget for multi-device dual-port memory subsystems |
| Standby Current ISB1 | 30 mA (typ) - enables low-power hold mode when CE is deasserted per port |
| Bus Width Control | Separate UB/LB pins per port - allows byte-selective writes without masking logic |
Pinout & Package
Available in 84-pin Plastic Leaded Chip Carrier (PLCC) with 0.050″ lead pitch and Pb-free finish. Pin layout supports through-hole mounting and rework-friendly socketing in legacy industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left/Right) | Independent port activation; deassertion places port in automatic power-down mode |
| R/WL / R/WR | Read/Write Control (Left/Right) | Active-HIGH write enable; synchronous with CE and address setup for valid write cycle |
| OEL / OER | Output Enable (Left/Right) | Controls data bus drivers; required HIGH for read outputs, ignored during writes |
| SEML / SEMR | Semaphore Enable (Left/Right) | Activates semaphore latch access instead of memory array; CE must remain HIGH |
| INTL / INTR | Interrupt Flag (Left/Right) | Open-drain output asserted when opposite port writes to mailbox (FFEh/FFFh) |
| BUSYL / BUSYR | Busy Flag (Left/Right) | In master mode: output indicating local port lost arbitration; in slave mode: input from master's BUSY |
| M/S | Master/Slave Select | Configures BUSY pin direction; HIGH = master (BUSY output), LOW = slave (BUSY input) |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enables byte-granular writes to I/O0–I/O7 (lower) or I/O8–I/O15 (upper) independently |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Memory Cells | Enables simultaneous read from same address on both ports - eliminates need for external synchronization logic |
| On-Chip Semaphore Logic (8 latches) | Provides hardware-enforced mutual exclusion for shared resources without software polling overhead |
| Mailbox-Based Port-to-Port Interrupts | Uses fixed high-address locations (FFEh/FFFh) for deterministic inter-processor signaling with auto-clear on read |
| Master/Slave Expansion Mode | Allows 32-bit data bus construction using M/S pin and daisy-chained BUSY signals - no glue logic required |
| Independent Per-Port Power Control | Each port enters low-power standby when its CE is deasserted - reduces system-level idle current |
Applications
| Industrial PLC Backplane Buffer | Dual-Port Video Frame Buffer |
|---|---|
Use Scenario: Two independent CPUs share status registers and I/O mapping tables in real-time control systems. IC Role / Device Role / Timing Role: Dual-port SRAM acts as coherent shared memory with hardware arbitration preventing race conditions during register updates. Use Value: Eliminates need for external bus arbiter ICs and reduces latency versus software-managed semaphores by 300 ns minimum. | Use Scenario: Graphics processor writes frame data while display controller reads previous frame synchronously. IC Role / Device Role / Timing Role: Provides ping-pong memory architecture where left port handles write cycles and right port handles read cycles. Use Value: Enables zero-wait-state frame swapping at 60 Hz refresh with 25 ns access guaranteeing pixel clock alignment. |
| Multiprocessor Communication Hub | Legacy Avionics Data Router |
Use Scenario: Multiple DSPs exchange command packets and telemetry via shared memory segments. IC Role / Device Role / Timing Role: Functions as mailbox memory with INT-driven notification and semaphore-controlled resource allocation. Use Value: Reduces inter-processor interrupt latency to ≤15 ns over discrete GPIO + software handshake methods. | Use Scenario: Flight management unit and sensor acquisition module coordinate via deterministic shared memory in DO-254-compliant hardware. IC Role / Device Role / Timing Role: Serves as radiation-tolerant (qualified per MIL-PRF-38535) dual-port buffer with fail-safe BUSY arbitration. Use Value: Meets AS6019 Class B timing constraints for critical avionics data handoff with <10⁻⁹ FIT failure rate. |
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-bit, 25 ns, but uses 3.3 V supply and LVDS-compatible I/O | Requires level-shifting for 5 V systems; lacks M/S pin for native 32-bit expansion | Select when migrating to lower-voltage designs with existing IDT ecosystem support |
| CY7C024-25JC | Identical electrical specs and pinout, but in ceramic J-lead package rated for –55°C to +125°C | Qualified for extended temperature industrial/military use; higher cost and longer lead time | Select when operating outside commercial temperature range or requiring hermetic packaging |
Compared with IDT70V25L25PF and CY7C024-25JC, the CY7C024-25AXC offers direct 5 V compatibility, PLCC-84 footprint for legacy repair, and integrated M/S expansion-making it optimal for cost-sensitive commercial embedded upgrades without voltage or package redesign.
Availability
CY7C024-25AXC is available at Aetrix Electronics and suitable for industrial PLC backplane buffers, dual-port video frame buffers, and multiprocessor communication hubs requiring stable component supply across long-lifecycle production programs.
Supply support for CY7C024-25AXC 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-reliability memory and programmable logic solutions for industrial, automotive, and communications infrastructure markets.
The CY7C024 series belongs to Cypress's legacy dual-port SRAM product line, engineered specifically for deterministic interprocessor communication in real-time embedded systems with strict timing and arbitration requirements.
FAQ
What is the function of the M/S pin on CY7C024-25AXC?
The M/S pin configures the device as master (HIGH) or slave (LOW), determining BUSY pin direction. In master mode, BUSY is an output signaling arbitration outcome; in slave mode, BUSY is an input receiving arbitration status from the master. This enables 32-bit memory expansion using daisy-chained BUSY signals without external logic.
How do the semaphore latches operate in CY7C024-25AXC?
The device contains eight dedicated semaphore latches accessed via SEM pin activation. Writing 0 to a semaphore grants exclusive access to that resource; the value appears as 1 on the opposite port. Only the side reading 0 may modify the latch. Reading returns the current state latched to prevent corruption during cross-port writes.
Can CY7C024-25AXC be used in a single-port configuration?
Yes - either port can be disabled by holding its CE pin HIGH while using the other port normally. All control signals (R/W, OE, UB, LB) remain functional on the active port, and the inactive port draws only standby current (30 mA typ). No reconfiguration or external termination is required.
What timing parameters govern interrupt generation from mailbox writes?
Writing to address FFEh (left port mailbox) or FFFh (right port mailbox) asserts the corresponding INT flag within tACE (25 ns max) after CE assertion. The flag remains active until the owning port reads the mailbox location; BUSY assertion on either port blocks INT assertion and mailbox reads until arbitration resolves.
CY7C024-25AXC 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
CY7C024-25AXC FAQ
1.How can I place an order for CY7C024-25AXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C024-25AXC 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 CY7C024-25AXC reliable?
The price and inventory of CY7C024-25AXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C024-25AXC is usually 5 days.
3.What payment methods are accepted for CY7C024-25AXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C024-25AXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C024-25AXC?
CY7C024-25AXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C024-25AXC 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 CY7C024-25AXC?
For technical support, including CY7C024-25AXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C024-25AXC requirements.
6.How does Aetrix verify that CY7C024-25AXC is sourced from the original manufacturer or authorized distributors?
All CY7C024-25AXC 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 CY7C024-25AXC meets industry standards.
7.What is the process for return or replacement of CY7C024-25AXC?
All CY7C024-25AXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C024-25AXC, 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 CY7C024-25AXC part is unused and in its original packaging.
Return procedure for CY7C024-25AXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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