Infineon Technologies CY7C037V-15AXCT

Overview

CY7C037V-15AXCT from Cypress Semiconductor is a 3.3V, 32K × 18-bit true dual-port static RAM with asynchronous operation, on-chip arbitration logic, and integrated semaphores for interprocessor resource coordination. It supports simultaneous independent read/write access to the same memory location, features 15 ns access time, 115 mA typical active current, and operates across industrial temperature range (–40°C to +85°C) in a 100-pin TQFP package. Used in multiprocessor communication buffers and real-time video frame stores.

For engineers reviewing the CY7C037V-15AXCT datasheet, CY7C037V-15AXCT pinout, CY7C037V-15AXCT application, or CY7C037V-15AXCT equivalent, key selection criteria include dual-port arbitration timing (tPS = 5 ns), BUSY/INT/SEM signal behavior, byte-select granularity (UBL/LBR for 9-bit upper/lower bytes), and master/slave expansion capability via M/S pin.

Technical Context

This device implements fully asynchronous dual-port SRAM architecture with separate address, data, and control buses per port (left/right), enabling concurrent access without external synchronization. Each port has dedicated CE0/CE1, R/W, OE, BUSY, INT, and SEM signals, plus UBL/LBL for 9-bit byte enable on x18 configuration.

Arbitration resolves contention via hardware BUSY assertion within tBLA = 8 ns (after address match) or tBLC = 10 ns (after CE low), while semaphore latches (8 shared, accessed via SEM pin + A0–A2) provide software-managed mutual exclusion using write-zero/read-back protocol with tSOP = 15 ns minimum deassertion delay.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V27L15PF and IS61WV3218-15TQLI, CY7C037V-15AXCT uniquely integrates M/S-configurable BUSY signaling, eight hardware semaphores, and dual-mailbox INT flags-reducing BOM count and firmware complexity in tightly coupled multiprocessor systems.

Availability

CY7C037V-15AXCT is available at Aetrix Electronics and suitable for industrial PLC communication buffers, real-time video frame stores, multiprocessor DSP co-processing, and avionics sensor fusion modules requiring stable component supply and long-term lifecycle support.

Supply support for CY7C037V-15AXCT 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-reliability memory and programmable solutions for industrial, automotive, and communications systems.

CY7C037V belongs to the CY7C0xxV dual-port SRAM product line, engineered specifically for deterministic interprocessor communication in real-time embedded systems requiring hardware-enforced concurrency control.

FAQ

What is the function of the M/S pin in CY7C037V-15AXCT?

The M/S pin configures the device as master (M/S = HIGH) or slave (M/S = LOW). In master mode, BUSY pins drive outputs to coordinate arbitration with slave devices; in slave mode, BUSY pins accept inputs from the master. This enables 36-bit memory expansion using multiple CY7C037V-15AXCT units without external logic or discrete buffers.

How do the semaphore latches operate in CY7C037V-15AXCT?

Semaphores are eight dedicated latches accessed via SEM pin assertion and A0–A2 address lines. Writing zero to a semaphore grants exclusive access; reading returns zero if acquired or one if contested. The protocol requires tSOP = 15 ns OE/SEM deassertion before readback to ensure latch stability, enabling deterministic resource locking between ports.

Can CY7C037V-15AXCT be used in a single-port configuration?

Yes - either port can be disabled by holding its CE inputs inactive (CE0 ≥ VIH or CE1 ≤ VIL), allowing the device to function as a 32K × 18-bit single-port SRAM. All control signals (R/W, OE, UBL, LBL) remain active on the enabled port, preserving full x18 data width and byte-select capability.

What is the timing relationship between BUSY assertion and address match?

BUSY is asserted tBLA = 8 ns after an address match occurs between ports, or tBLC = 10 ns after CE goes LOW during contention. This fixed latency allows system designers to calculate worst-case wait states and configure processor WAIT inputs accordingly without relying on variable software polling loops.