Infineon Technologies CY7C027V-25AI

Overview

CY7C027V-25AI from Cypress Semiconductor is a 3.3 V, 32K × 16-bit true dual-port static RAM with asynchronous operation, 25 ns access time, on-chip arbitration logic, and integrated semaphores for interprocessor synchronization. It supports simultaneous independent read/write access to the same memory location and is used in multiprocessor communication buffers and video frame stores.

For engineers reviewing the CY7C027V-25AI datasheet, CY7C027V-25AI pinout, CY7C027V-25AI application, or CY7C027V-25AI equivalent, key selection criteria include dual-port arbitration timing (tPS = 5 ns), BUSY/INT flag behavior, M/S master/slave expansion capability, and industrial temperature range (–40°C to +85°C) compliance.

Technical Context

This device implements fully asynchronous dual-port SRAM architecture with separate address, data, and control buses per port (left/right), enabling concurrent access without external clocking. Each port features independent CE0/CE1, R/W, OE, UBL/LBL, and BUSY/INT signals - no shared timing constraints between ports.

On-chip arbitration resolves contention via deterministic BUSY assertion (tBLA = 5 ns, tBLC = 7 ns) and priority resolution when address matches occur within tPS (5 ns). Semaphore latches (8 total) operate independently of main memory array using dedicated SEM enable and A0–A2 addressing.

Key Specifications

Pinout & Package

100-pin Pb-free Thin Quad Plastic Flatpack (TQFP), 14 mm × 14 mm body, 0.5 mm pitch. Pin 1 marked by dot; top-side view per Figure 1 in datasheet Rev. *D.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Compared with IDT70V27L25PF and IS61WV3216EBLL-25MLI, CY7C027V-25AI delivers integrated hardware arbitration, mailbox interrupts, and semaphores - reducing FPGA logic utilization by ≥35% and eliminating external contention resolution components in multiprocessor designs.

Availability

CY7C027V-25AI is available at Aetrix Electronics and suitable for industrial PLC communication buffers, real-time video frame stores, multiprocessor DSP co-processing, and avionics data concentrators requiring stable component supply across extended product lifecycles.

Supply support for CY7C027V-25AI 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 infrastructure.

CY7C027V-25AI belongs to the CY7C0xxV dual-port SRAM product line, engineered specifically for deterministic interprocessor communication in real-time embedded systems with strict timing and resource-sharing requirements.

FAQ

What is the function of the M/S pin on CY7C027V-25AI?

The M/S pin configures the device as master (M/S = HIGH) or slave (M/S = LOW) for word-width expansion. In master mode, BUSY pins are outputs that drive slave BUSY inputs; in slave mode, BUSY pins become inputs. This enables 32-bit memory expansion without external arbitration logic or discrete gates, as specified in the functional description on page 5 of datasheet Rev. *D.

How does the semaphore subsystem operate without interfering with main memory access?

Semaphores occupy eight dedicated latches outside the main 32K × 16 memory array and are accessed only when SEM is asserted LOW and CE is HIGH. Addressing uses A0–A2 exclusively; other address bits are ignored. Reads return latched values to prevent corruption during cross-port writes, and tSOP (15 ns) enforces minimum deassertion time before semaphore read verification.

Can CY7C027V-25AI operate reliably at 3.0 V supply voltage?

No. The device is characterized and guaranteed only for 3.3 V ± 0.3 V (3.0 V to 3.6 V) operation per Absolute Maximum Ratings and Operating Range tables on page 7 of datasheet Rev. *D. At exactly 3.0 V, tACC may exceed 25 ns and ISB3 may rise above 10 µA, violating datasheet limits. Industrial designs must maintain VCC ≥ 3.15 V for full specification compliance.

What happens if both ports attempt to write to the same address simultaneously?

The on-chip arbitration logic asserts BUSY on the losing port within tBLA = 5 ns (after address match) or tBLC = 7 ns (after CE assertion). The winning port completes its write; the losing port's write is blocked until BUSY deasserts. If tPS (5 ns) is violated, arbitration outcome remains deterministic but port priority is not guaranteed - requiring software timeout handling per functional description on page 5.