Infineon Technologies CY7C027AV-25AXI

Overview

CY7C027AV-25AXI from Infineon Technologies is a 32K × 16-bit asynchronous dual-port static RAM (SRAM) with 25 ns access time, CMOS process technology, and industrial temperature range (–40°C to +85°C). It supports independent concurrent read/write operations on both ports, features automatic power-down mode, and is used in real-time DSP systems, network packet buffering, and FPGA co-processor memory interfaces.

For engineers reviewing the CY7C027AV-25AXI datasheet, CY7C027AV-25AXI pinout, CY7C027AV-25AXI application, or CY7C027AV-25AXI equivalent, key selection criteria include dual-port arbitration timing, bus contention resolution behavior, low-power standby current (≤5 µA), and compatibility with legacy Cypress-compatible address/data bus protocols.

Technical Context

This device implements true dual-port architecture with separate address, data, and control buses for each port-no internal arbitration logic required. It uses standard TTL-compatible inputs and outputs, supports byte-wide write enable (UB/LB), and includes chip select (CE1/CE2) and output enable (OE) controls per port.

Internal circuitry ensures simultaneous access integrity via built-in busy logic and interrupt flag generation when contention occurs. The 25 ns access time applies under worst-case V_CC = 5.0 V ±10% and T_A = +85°C conditions, with t_CO (output hold after CE/OE deassertion) specified at 5 ns max.

Key Specifications

Pinout & Package

Supplied in a 68-pin PLCC (Plastic Leaded Chip Carrier) package with J-lead configuration, lead pitch 0.05 inch, body size 1.100 in × 1.100 in. Pin 1 marked by corner notch; pins arranged in single continuous counterclockwise loop.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C027AV-25AC, the -25AXI offers RoHS compliance and industrial-grade plastic packaging at lower cost; compared with IS61LV51216-25MLI, it retains critical hardware arbitration features essential for hard real-time determinism.

Availability

CY7C027AV-25AXI is available at Aetrix Electronics and suitable for telecom packet buffering, DSP co-processor memory, and industrial PLC data exchange requiring stable component supply across multi-year production cycles.

Supply support for CY7C027AV-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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, security solutions, and memory products, with global R&D and manufacturing infrastructure.

CY7C027AV-25AXI belongs to Infineon's legacy Cypress SRAM product line, designed specifically for deterministic dual-access memory subsystems in real-time embedded systems where bus contention must be resolved in hardware.

FAQ

What is the maximum clock frequency supported for synchronous operation?

CY7C027AV-25AXI is an asynchronous SRAM and does not use a clock signal. All timing is governed by setup/hold relationships between address, control, and data signals. The 25 ns access time defines the minimum cycle period for reliable read/write operations - no external clock is required or supported.

Can Port A and Port B operate at different voltage levels?

No. Both ports share a single V_CC pin rated for 5.0 V ±10%. The device does not support mixed-voltage I/O or level translation. Interfacing with 3.3 V logic requires external bus transceivers or voltage translators to maintain signal integrity and avoid overvoltage damage.

How is bus contention resolved when both ports write to the same address?

When both ports assert write enables (WE1 and WE2 active) to the same address simultaneously, the internal contention detector pulls the open-drain INT pin low. No data corruption occurs - the last write to complete determines final content - but the INT signal alerts the system to initiate corrective action.

Is there a recommended decoupling capacitor layout for stable operation?

Infineon specifies 0.1 µF ceramic capacitors placed within 5 mm of each V_CC pin (two V_CC pins on Pins 33 and 67), plus one 4.7 µF tantalum capacitor near the PLCC corner. Ground connections must use multiple vias to minimize inductance; split-plane routing is prohibited beneath the device footprint.