Infineon Technologies CY7C056V-15AXC

Overview

CY7C056V-15AXC from Infineon (formerly Cypress) is a 32K × 16-bit asynchronous dual-port static RAM (SRAM) with 15 ns access time, CMOS process technology, and 3.3 V core supply. It supports independent concurrent read/write operations on both ports, features bus contention arbitration via BUSY output, and is used in high-speed communication buffers and FPGA co-processor memory interfaces.

For engineers reviewing the CY7C056V-15AXC datasheet, CY7C056V-15AXC pinout, CY7C056V-15AXC application, or CY7C056V-15AXC equivalent, key selection criteria include dual-port arbitration timing, 3.3 V I/O compatibility, BUSY flag behavior, and industrial temperature range (-40°C to +85°C) support for embedded control systems.

Technical Context

This device implements true dual-port architecture with separate address, data, and control lines per port, enabling simultaneous access without internal arbitration logic beyond the BUSY signal. It uses standard TTL-compatible inputs and LVTTL-compatible outputs, with separate chip enables (CE1/CE2) and output enables (OE1/OE2) per port.

Internal write cycles are synchronized to the active edge of the respective port's WE signal; no clock is required. The BUSY pin asserts low when both ports attempt write access to the same memory location, preventing data corruption through external handshake coordination.

Key Specifications

Pinout & Package

Supplied in a 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments follow standard dual-port SRAM layout with mirrored A/D/CE/OE/WE groups for Port A and Port B.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V25L15PF, CY7C056V-15AXC eliminates level-shifter components and simplifies power delivery; versus IS61WV51216BLL-15TLI, it provides hardware-enforced arbitration critical for deterministic real-time systems.

Availability

CY7C056V-15AXC is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, FPGA co-processor interfaces, and network packet buffering requiring stable component supply across extended product lifecycles.

Supply support for CY7C056V-15AXC 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, and memory solutions, with global manufacturing and quality certification to ISO/TS 16949 and AEC-Q100 standards.

CY7C056V-15AXC belongs to Infineon's legacy Cypress dual-port SRAM product line, engineered specifically for deterministic inter-processor communication in real-time embedded systems where concurrent access and hardware arbitration are mandatory.

FAQ

What is the maximum clock frequency supported by CY7C056V-15AXC?

CY7C056V-15AXC is an asynchronous SRAM and does not use a clock signal. Its 15 ns access time supports effective interface speeds up to 66 MHz when used with microcontrollers or FPGAs that meet setup/hold timing requirements - no internal clock circuitry is present.

Can CY7C056V-15AXC operate with only one port enabled?

Yes. Either port can be fully disabled using its dedicated CE input (CE1 or CE2), allowing the other port to operate as a standard single-port SRAM. When one CE is held high, that port's I/Os enter high-impedance state and consume negligible current - enabling flexible system partitioning.

Is the BUSY signal edge-triggered or level-sensitive?

The BUSY signal is level-sensitive and remains asserted low for the entire duration of conflicting write cycles to the same address. It deasserts only after both WE signals return inactive and the internal arbitration resolves - requiring external logic to hold off the next write until BUSY goes high.

Does CY7C056V-15AXC support battery backup or non-volatility?

No. CY7C056V-15AXC is a volatile CMOS SRAM and loses all stored data when V_CC drops below 1.5 V or is removed. It does not integrate battery switchover circuitry, capacitors, or non-volatile storage - external backup solutions must be implemented separately if data retention is required.