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Infineon Technologies CY7C027-20AXI
- Part No.:
- CY7C027-20AXI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
CY7C027-20AXI.pdf
- Description:
- IC SRAM 512KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,720
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Product details
Overview
CY7C027-20AXI from Cypress Semiconductor is a 32K × 16 true dual-port static RAM with asynchronous operation, 20 ns access time, 5 V supply, and 100-pin TQFP package. It enables simultaneous independent read/write access to the same memory location by two processors, supporting interprocessor communication in real-time embedded systems.
For engineers reviewing the CY7C027-20AXI datasheet, CY7C027-20AXI pinout, CY7C027-20AXI application, or CY7C027-20AXI equivalent, key selection criteria include dual-port arbitration logic, on-chip semaphores, BUSY/INT flag signaling, and master/slave expandability for 32-bit bus architectures.
Technical Context
The device implements fully asynchronous dual-port architecture with separate address, data, and control buses per port (left/right), enabling concurrent access without external synchronization. On-chip arbitration resolves contention via BUSY flag assertion and semaphore latches-eight shared registers controlled exclusively by one port at a time.
It supports automatic per-port power-down via independent CE0/CE1 enable logic, with three standby current modes (ISB1–ISB4) depending on TTL/CMOS input levels. The M/S pin configures master/slave behavior for seamless 32-bit expansion without discrete glue logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 16 (512 KB total, A0–A14 addressing) |
| Access Time | 20 ns maximum - guarantees timing margin for 50 MHz system clocks |
| Supply Voltage | 5 V ±10% - compatible with legacy 5 V TTL/CMOS logic families |
| Operating Current | 180 mA typical - enables low-power operation in active multi-processor nodes |
| Standby Current | 0.05 mA typical (ISB3, both ports CMOS-level) - supports battery-backed retention |
| Temperature Range | –40 °C to +85 °C - qualified for industrial-grade embedded deployment |
| Package | 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch) - surface-mount compatible with automated assembly |
Pinout & Package
Package: 100-pin Thin Quad Flat Pack (TQFP), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE0L / CE0R | Left/Right Port Chip Enable 0 | Active-low primary enable; must be LOW with CE1 HIGH for valid access |
| R/WL / R/WR | Left/Right Port Read/Write Control | LOW = write, HIGH = read; controls direction of data flow on I/O bus |
| OEL / OER | Left/Right Port Output Enable | Active-low; enables tristate output drivers during read operations |
| A0L–A14L / A0R–A14R | Left/Right Port Address Inputs | 15-bit address bus for 32K depth; no A15 connection required for CY7C027 |
| I/O0L–I/O15L / I/O0R–I/O15R | Left/Right Port Bidirectional Data Bus | 16-bit parallel interface; UBL/UBR and LBL/LBR support byte-level writes |
| SEML / SEMR | Left/Right Port Semaphore Enable | Enables access to eight shared semaphore latches for software resource locking |
| INTL / INTR | Left/Right Port Interrupt Flag | Open-drain output used for mailbox-style inter-port signaling |
| BUSYL / BUSYR | Left/Right Port Busy Flag | Indicates contention when both ports attempt simultaneous access to same location |
| M/S | Master/Slave Select | Configures device as master (HIGH) or slave (LOW) for 32-bit bus expansion |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables concurrent read/write to identical addresses without external arbitration logic |
| On-chip semaphore logic | Eight dedicated latches allow deterministic software-controlled resource sharing between ports |
| Dual-byte control (UBL/LBL, UBR/LBR) | Permits independent upper- and lower-byte writes without masking or read-modify-write cycles |
| Automatic per-port power-down | Reduces standby current to 50 µA when CE0/CE1 held high, preserving data in battery backup mode |
| Master/slave pin (M/S) | Eliminates need for external master/slave configuration logic in wide-bus memory systems |
Applications
| Industrial PLC Communication Buffer | Real-Time Video Frame Buffer |
|---|---|
|
Use Scenario: Two independent PLC CPUs exchange status and control data across shared memory without bus contention. IC Role / Device Role / Timing Role: Dual-port SRAM acts as non-blocking inter-CPU mailbox with hardware BUSY/INT handshake. Use Value: Eliminates software polling delays and ensures deterministic latency under worst-case contention via on-chip arbitration. |
Use Scenario: Graphics controller writes frame data while display engine reads prior frame synchronously. IC Role / Device Role / Timing Role: Asynchronous dual-port buffer decouples write and read clock domains in video pipeline. Use Value: Enables flicker-free display updates with zero-frame-latency overlap using 20 ns access time and byte-select control. |
| Telecom Protocol Stack Buffer | Avionics Sensor Fusion Memory |
|
Use Scenario: Baseband processor and protocol stack processor share packet headers and metadata in LTE/FDD systems. IC Role / Device Role / Timing Role: Dual-port RAM serves as low-latency shared context memory with semaphore-based resource locking. Use Value: Reduces inter-processor interrupt overhead by 70% compared to SPI/I²C buffers, validated in DO-254-compliant designs. |
Use Scenario: Flight control computer and inertial measurement unit (IMU) concurrently access fused navigation state vectors. IC Role / Device Role / Timing Role: Radiation-tolerant (industrial temp) dual-port memory provides deterministic access for safety-critical sensor fusion. Use Value: Guarantees sub-20 ns memory access jitter across –40 °C to +85 °C, meeting ARINC 653 partition 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 |
|---|---|---|---|
| IDT70V27L-20PF | 32K × 16, 20 ns, 3.3 V supply, 80-pin TQFP | Requires level-shifting for 5 V systems; lower standby current (10 µA) | Select when migrating to 3.3 V infrastructure and board space is constrained |
| ISSI IS61WV51216BLL-20NLI | 512K × 16, 20 ns, 3.3 V supply, 100-pin TQFP | Higher density but incompatible voltage; lacks M/S pin and semaphore logic | Choose only if memory size is primary constraint and arbitration is handled externally |
Compared with IDT70V27L-20PF and IS61WV51216BLL-20NLI, CY7C027-20AXI uniquely retains 5 V compatibility, integrated semaphores, and master/slave expansion-critical for legacy industrial and avionics upgrades where voltage and feature parity matter more than density.
Availability
CY7C027-20AXI is available at Aetrix Electronics and suitable for industrial PLC communication buffers, real-time video frame buffers, telecom protocol stack buffers, and avionics sensor fusion memory requiring stable component supply across extended temperature ranges.
Supply support for CY7C027-20AXI 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 solutions for industrial, automotive, and communications markets.
CY7C027 belongs to Cypress's legacy dual-port SRAM product line, engineered specifically for deterministic interprocessor communication in hard real-time systems where bus contention resolution and low-latency access are non-negotiable.
FAQ
What is the function of the M/S pin on CY7C027-20AXI?
The M/S (Master/Slave) pin configures the device for 32-bit or wider memory expansion: HIGH selects master mode (drives arbitration signals), LOW selects slave mode (responds to master). This eliminates external logic for multi-device bus widening and is essential for building scalable dual-port memory subsystems without increasing PCB complexity.
How does the semaphore logic operate in CY7C027-20AXI?
The device contains eight dedicated semaphore latches accessible via SEML/SEMR pins. When one port asserts semaphore enable, it gains exclusive control of a latch to signal resource ownership (e.g., shared buffer access). The other port reads the latch state to determine availability-enabling lock-free, deterministic software handshaking without polling overhead.
Can CY7C027-20AXI retain data during power loss?
Yes-when CE is held HIGH within VCC to VCC – 0.2 V and VCC ≥ 2.0 V, the device enters data retention mode with guaranteed operation down to 2 V. Typical retention current is 1.5 mA at 2 V, enabling integration with coin-cell backup circuits for nonvolatile state preservation in industrial controllers.
What is the difference between ISB1, ISB2, ISB3, and ISB4 standby currents?
ISB1 (both ports TTL-level CE) = 45 mA typical; ISB2 (one port TTL-level) = 110 mA; ISB3 (both ports CMOS-level CE) = 0.05 mA; ISB4 (one port CMOS-level) = 100 mA. ISB3 delivers ultra-low power for battery-backed retention; ISB1 suits systems where CE inputs remain at TTL logic levels during sleep.
CY7C027-20AXI 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:
- 512Kbit
- Memory Organization:
- 32K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20ns
- Access Time:
- 20 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)
CY7C027-20AXI FAQ
1.How can I place an order for CY7C027-20AXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C027-20AXI 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 CY7C027-20AXI reliable?
The price and inventory of CY7C027-20AXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C027-20AXI is usually 5 days.
3.What payment methods are accepted for CY7C027-20AXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C027-20AXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C027-20AXI?
CY7C027-20AXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C027-20AXI 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 CY7C027-20AXI?
For technical support, including CY7C027-20AXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C027-20AXI requirements.
6.How does Aetrix verify that CY7C027-20AXI is sourced from the original manufacturer or authorized distributors?
All CY7C027-20AXI 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 CY7C027-20AXI meets industry standards.
7.What is the process for return or replacement of CY7C027-20AXI?
All CY7C027-20AXI units undergo pre-shipment inspection (PSI). If there is an issue with CY7C027-20AXI, 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 CY7C027-20AXI part is unused and in its original packaging.
Return procedure for CY7C027-20AXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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