Infineon Technologies CY7C027V-15AC

Overview

CY7C027V-15AC from Cypress Semiconductor is a 32K × 16-bit true dual-port static RAM with independent asynchronous left/right ports, 15 ns access time, 3.3 V supply, and on-chip arbitration logic for interprocessor communication in real-time embedded systems.

For engineers reviewing the CY7C027V-15AC datasheet, CY7C027V-15AC pinout, CY7C027V-15AC application, or CY7C027V-15AC equivalent, key selection criteria include simultaneous port access capability, BUSY/INT flag timing (tBLA = 15 ns), semaphore latch control, 10 µA CMOS standby current (ISB3), and TQFP-100 package compatibility with legacy IDT70V27 designs.

Technical Context

This device implements fully asynchronous dual-port operation with separate address, data, and control buses per port (A0L–A14L/I/O0L–I/O15L/R/WL/CEL/OEL on left; mirrored on right), enabling concurrent read/write to identical memory locations without external arbitration logic.

On-chip features include eight shared semaphores for software handshaking, master/slave mode selection via M/S pin for 32-bit bus expansion, and automatic per-port power-down triggered by CE assertion-supporting low-power inter-processor buffering in telecom and video subsystems.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flatpack (TQFP), 14 mm × 14 mm, 0.5 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V27L15PF, CY7C027V-15AC reduces BOM count via integrated arbitration and signaling; versus CY7C027V-20AC, it delivers 33% higher dual-port bandwidth at the cost of +5 mA active current.

Availability

CY7C027V-15AC is available at Aetrix Electronics and suitable for telecom infrastructure, real-time video processing, industrial PLCs, and DSP co-processor interfaces requiring stable component supply and long-term obsolescence management.

Supply support for CY7C027V-15AC 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 fabless semiconductor company specializing in memory, microcontrollers, and programmable logic solutions for embedded systems.

CY7C027V belongs to Cypress's legacy dual-port SRAM product line, designed specifically for deterministic interprocessor communication in real-time control and signal processing applications where hardware arbitration and low-latency memory access are critical.

FAQ

What is the maximum clock frequency supported by CY7C027V-15AC?

CY7C027V-15AC does not use a clock; it is fully asynchronous. Its 15 ns access time (tRC) supports effective dual-port throughput up to 66.7 MHz in burst-read scenarios. Timing is governed by address and control setup/hold requirements-not a system clock-making it suitable for mixed-timing-domain systems.

Can CY7C027V-15AC operate with only one port active?

Yes. Each port operates independently: asserting CE on one port places it in active mode while the other port remains in standby (ISB3 = 10 µA typical if both CEs are CMOS-high). This enables asymmetric usage-for example, left port for firmware updates and right port for runtime data-without performance penalty.

How does the BUSY flag behave during simultaneous same-address access?

When both ports attempt to access the same memory location, the BUSY flag on the contending port goes LOW after tBLA = 15 ns (min). The winning port continues normal access; the losing port must wait until BUSY returns HIGH before retrying-ensuring deterministic resolution without data corruption.

Is CY7C027V-15AC compatible with 5 V logic interfaces?

No. CY7C027V-15AC is strictly a 3.3 V device: VIH = 2.2 V, VIL = 0.8 V, and absolute max input voltage is VCC + 0.5 V (≤3.8 V). Direct connection to 5 V logic will damage the device. Level-shifting circuitry is required for interoperability with 5 V systems.