Infineon Technologies CY7C057V-15AC

Overview

CY7C057V-15AC from Cypress Semiconductor is a 32K × 36-bit asynchronous dual-port static RAM with true dual-ported memory cells, 15 ns access time, 3.3 V supply, and integrated on-chip arbitration logic. It supports simultaneous independent read/write access to the same memory location and is used in interprocessor communication buffers and dual-port video frame stores.

For engineers reviewing the CY7C057V-15AC datasheet, CY7C057V-15AC pinout, CY7C057V-15AC application, or CY7C057V-15AC equivalent, key selection considerations include 32K × 36 organization, 144-pin TQFP package, M/S pin for master/slave expansion, semaphore logic for software handshaking, and dual-port BUSY/INT flag signaling.

Technical Context

The CY7C057V-15AC implements fully asynchronous dual-port operation with independent left/right port control (CE0/CE1, R/W, OE), enabling concurrent access without external synchronization. Its on-chip arbitration resolves contention when both ports attempt simultaneous access to the same address.

It integrates eight shared semaphores for resource locking between processors, plus dedicated INT and BUSY flags per port for mailbox-style inter-port communication and collision detection. The M/S pin configures the device as master or slave for depth expansion to 72-bit or wider data buses.

Key Specifications

Pinout & Package

Package: 144-pin Thin Quad Flatpack (TQFP), 20 mm × 20 mm body, 0.5 mm pitch, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V27L15PF and IS61WV102436B, the CY7C057V-15AC uniquely integrates semaphores, M/S expansion, and right-port bus matching-reducing BOM count and PCB area in multiprocessor systems requiring coordinated memory access.

Availability

CY7C057V-15AC is available at Aetrix Electronics and suitable for interprocessor communication buffers, dual-port video frame stores, and communications protocol stack buffers requiring stable component supply across production lifecycles.

Supply support for CY7C057V-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) designs high-performance memory and programmable solutions for embedded systems, with focus on reliability and integration.

The CY7C057V belongs to Cypress's FLEx36™ dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor data exchange in real-time embedded and communications systems.

FAQ

What is the function of the M/S pin on CY7C057V-15AC?

The M/S (Master/Slave) pin configures the device for use in multi-chip memory expansions. When asserted HIGH, it operates as a master; when LOW, as a slave-enabling 72-bit or wider data buses without external master/slave logic or mixed-part BOMs. This pin directly controls internal chip-enable routing and arbitration priority.

How does the semaphore logic work in CY7C057V-15AC?

The CY7C057V-15AC contains eight dedicated semaphore latches, each accessible by either port via SEML/SEMR. Only one port can assert control of a given semaphore at a time, signaling exclusive access to a shared resource. Control is granted atomically upon successful write to the latch, preventing race conditions in software handshaking protocols.

Can CY7C057V-15AC operate with mixed voltage interfaces on left and right ports?

No-the CY7C057V-15AC requires 3.3 V ± 165 mV on VDD for both ports; all I/Os are referenced to this single supply. While the right port supports bus matching (9/18/36-bit width adaptation), voltage-level translation must be handled externally if interfacing with 1.8 V or 2.5 V logic families.

What is the significance of ISB3 standby current specification?

ISB3 (10 µA typical) specifies current draw when both ports are deselected using CMOS-level control signals (CE0/CE1 in high-Z state). This ultra-low mode preserves memory contents while minimizing power in battery-backed or energy-constrained systems-distinct from higher-ISB1/ISB2 modes that assume TTL-level deselection.