Infineon Technologies CY7C038V-15AXC

Overview

CY7C038V-15AXC from Cypress Semiconductor is a 3.3V, 64K × 18-bit true dual-port static RAM with asynchronous operation, 15 ns access time, on-chip arbitration logic, and integrated semaphores for interprocessor resource sharing in real-time embedded systems.

For engineers reviewing the CY7C038V-15AXC datasheet, CY7C038V-15AXC pinout, CY7C038V-15AXC application, or CY7C038V-15AXC equivalent, this device supports deterministic port-to-port communication via BUSY/INT/SEM signals, master/slave expansion to 36-bit data width, and low-power CMOS operation across industrial temperature range (–40°C to +85°C).

Technical Context

The CY7C038V-15AXC implements fully independent left/right ports with separate address buses (A0L–A15L / A0R–A15R), control lines (CE0L/CE1L/R/WL/OEL vs CE0R/CE1R/R/WR/OER), and I/O banks (I/O0L–I/O17L / I/O0R–I/O17R), enabling simultaneous read/write access to any memory location without external arbitration logic.

Its on-chip arbitration resolves contention via BUSYL/BUSYR outputs (master mode) or inputs (slave mode), while eight dedicated semaphore latches-accessed via SEML/SEMR and A0–A2-provide hardware-enforced mutual exclusion for shared resources such as DMA buffers or configuration registers.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flatpack (TQFP), RoHS-compliant, body size 14 mm × 14 mm, lead pitch 0.5 mm, exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V27L15PF8 and IS61WV6418BLL-15NLI, the CY7C038V-15AXC uniquely integrates full 18-bit dual-port operation, hardware semaphore latches, and master/slave expansion - reducing BOM count and eliminating timing-critical external arbitration logic.

Availability

CY7C038V-15AXC is available at Aetrix Electronics and suitable for industrial automation, avionics data acquisition, and telecom infrastructure requiring stable component supply, long-lifecycle support, and guaranteed Pb-free compliance.

Supply support for CY7C038V-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

Cypress Semiconductor (now part of Infineon Technologies) designs high-reliability memory and programmable solutions for industrial, automotive, and communications markets.

The CY7C0xxV dual-port SRAM product line targets deterministic interprocessor communication in real-time embedded systems - emphasizing hardware arbitration, low-latency signaling, and industrial temperature resilience.

FAQ

What is the function of the M/S pin in CY7C038V-15AXC?

The M/S (Master/Slave) pin configures the device for 36-bit memory expansion: when HIGH, it operates as a master with BUSY pins as outputs; when LOW, as a slave with BUSY pins as inputs. This enables daisy-chained arbitration without external logic, supporting scalable dual-port memory width beyond 18 bits.

How does semaphore operation prevent resource conflicts between ports?

Each of the eight semaphores functions as an atomic lock: writing '0' to a semaphore latch grants exclusive access to the associated resource, and only the side holding the '0' may modify it. Reading returns the current state, allowing polling until ownership is acquired - ensuring deterministic, race-free coordination without CPU intervention.

Can CY7C038V-15AXC operate with mixed voltage interfaces?

No - the device is strictly a 3.3V-only part (VCC = 3.3V ± 300 mV). Input thresholds (VIH = 2.2V, VIL = 0.8V) and output drive levels (VOH = 2.4V, VOL = 0.4V) are specified for 3.3V CMOS/TTL compatibility. It does not support 5V-tolerant or multi-voltage I/O operation.

What happens during simultaneous access to the same memory location?

On-address-match contention, the on-chip arbitration logic asserts BUSYL/BUSYR within tBLA (≤15 ns) to indicate loss of access. The winning port proceeds with its cycle; the losing port stalls until BUSY deasserts. No data corruption occurs, and the outcome is deterministic when tPS setup is met - guaranteeing safe concurrent access.