Infineon Technologies CY7C037V-25AXC

Overview

CY7C037V-25AXC from Cypress Semiconductor is a 3.3V, 32K × 18-bit true dual-port static RAM with independent left/right ports, 25 ns maximum access time, on-chip arbitration logic, and semaphore support for interprocessor communication in embedded multiprocessor systems.

For engineers reviewing the CY7C037V-25AXC datasheet, CY7C037V-25AXC pinout, CY7C037V-25AXC application, or CY7C037V-25AXC equivalent, key selection criteria include simultaneous port access timing, BUSY/INT/SEM signal behavior, TQFP-100 package compatibility, and x18 data width requirements for video buffering or real-time control interfaces.

Technical Context

This device implements fully asynchronous dual-port architecture with separate address, data, and control buses per port (A0L–A14L/I/O0L–I/O17L/R/WL/CE0L/CE1L/OEL/SEML/UBL/LBL/INTL/BUSYL and mirrored right-side signals), enabling deterministic read/write conflict resolution via hardware BUSY assertion within tBLA/tBLC timing windows.

It integrates eight dedicated semaphore latches accessible via SEM pin with A0–A2 addressing, supporting atomic resource locking between ports without external logic; M/S pin configures master/slave operation for 36-bit memory expansion using BUSY chaining.

Key Specifications

Pinout & Package

Package: 100-pin Pb-free Thin Quad Flatpack (TQFP), 14 mm × 14 mm body, 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 IS61WV3218EBLL-25BLI and CY7C036V-25AC, CY7C037V-25AXC delivers integrated arbitration and semaphores that reduce firmware complexity and eliminate external logic, while its x18 width provides higher effective bandwidth for video and DSP workloads without software bit manipulation.

Availability

CY7C037V-25AXC is available at Aetrix Electronics and suitable for video frame buffering, real-time control interfaces, multiprocessor message passing, and DSP co-processor data exchange requiring stable component supply across production lifecycles.

Supply support for CY7C037V-25AXC 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, emphasizing reliability, low power, and integration.

CY7C037V belongs to the CY7C0xxV dual-port SRAM product line, engineered specifically for deterministic interprocessor communication and real-time data sharing in safety-critical and multimedia applications.

FAQ

What is the function of the M/S pin in CY7C037V-25AXC?

The M/S pin configures the device as either a master (M/S = HIGH) or slave (M/S = LOW). In master mode, BUSY pins act as outputs to signal arbitration outcomes to downstream slaves; in slave mode, BUSY pins become inputs to receive arbitration signals from a master device, enabling seamless 36-bit memory expansion without external logic.

How does the semaphore feature operate without external software intervention?

Semaphore latches are accessed by asserting SEM while holding CE HIGH and using A0–A2 to select one of eight latches. Writing '0' atomically claims the latch; reading returns the current state. The hardware ensures only one port can modify a given semaphore at a time, providing lock-free resource allocation without CPU polling or OS kernel involvement.

Can CY7C037V-25AXC be used in systems requiring both 3.3V and 5V logic interfaces?

No - CY7C037V-25AXC operates exclusively at 3.3V ± 300 mV and is not 5V-tolerant. Its input thresholds (VIH = 2.2 V, VIL = 0.8 V) and output drive levels are specified only for 3.3V LVTTL/LVCMOS. Direct connection to 5V logic risks damage or undefined behavior; level-shifting circuitry is required for mixed-voltage systems.

What happens during simultaneous access to the same memory location by both ports?

When both ports attempt access within tPS (pin-to-pin setup window), on-chip arbitration asserts BUSY on the losing port after tBLA or tBLC delay. The winning port proceeds with read/write; the losing port's BUSY output remains active until the winning port completes. This hardware resolution avoids data corruption and eliminates need for software retry loops.