Infineon Technologies CY7C037-15AC

Overview

CY7C037-15AC from Cypress Semiconductor is a 32K × 18-bit true dual-port static RAM with independent left/right ports, 15 ns access time, 5 V supply, and on-chip arbitration logic for interprocessor communication in real-time embedded systems.

For engineers reviewing the CY7C037-15AC datasheet, CY7C037-15AC pinout, CY7C037-15AC application, or CY7C037-15AC equivalent, this device supports simultaneous asynchronous read/write to shared memory locations, semaphore-based resource locking, port-to-port interrupt signaling, and master/slave expansion for 36-bit bus architectures.

Technical Context

The CY7C037-15AC implements fully asynchronous dual-port operation with separate address, data, and control buses per port (A0L–A14L/I/O0L–I/O17L and A0R–A14R/I/O0R–I/O17R), enabling concurrent access without external synchronization logic.

Its on-die arbitration includes BUSY flags (output on master, input on slave), INT flags for mailbox-style inter-port messaging, eight semaphores for software-controlled resource sharing, and M/S pin-selectable master/slave mode for seamless 36-bit memory expansion.

Key Specifications

Pinout & Package

CY7C037-15AC is housed in a 100-pin Thin Quad Plastic Flatpack (TQFP) package with exposed pad (not electrically connected), 0.5 mm pitch, and JEDEC MO-140 compliant footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT7027S15JGI and CY7C036-15AC, CY7C037-15AC uniquely delivers native 18-bit dual-port bandwidth, eliminating glue logic for wide-data peripherals while maintaining full pin compatibility with the CY7C036 family for design reuse.

Availability

CY7C037-15AC is available at Aetrix Electronics and suitable for interprocessor communication buffers, dual-port video frame buffers, communications protocol stack buffers, and industrial PLC data exchange memory requiring stable component supply and long-term obsolescence management.

Supply support for CY7C037-15AC 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) is a fabless semiconductor company specializing in high-performance memory, microcontrollers, and programmable logic solutions for industrial and embedded markets.

The CY7C0xx dual-port SRAM product line was engineered for deterministic, low-latency shared memory in tightly coupled multiprocessor systems-prioritizing hardware arbitration, semaphore support, and seamless bus expansion over density or cost-per-bit.

FAQ

What is the maximum clock frequency supported by CY7C037-15AC?

CY7C037-15AC does not use a clock signal-it operates asynchronously. Its performance is defined by access time (15 ns max) and cycle time (15 ns read/write), allowing continuous address/data changes without synchronization. System timing depends on external controller setup/hold margins relative to these parameters.

Can CY7C037-15AC operate with mixed voltage interfaces (e.g., 3.3 V logic driving its inputs)?

No-CY7C037-15AC requires 5 V ±10% VCC and TTL-compatible input thresholds (VIH = 2.2 V min, VIL = 0.8 V max). Driving from 3.3 V logic violates VIH specification and risks unreliable operation; level-shifting circuitry is mandatory for interfacing with 3.3 V controllers.

How does the M/S pin affect BUSY signal behavior?

When M/S = HIGH, the device operates as master: BUSYL/BUSYR are outputs that go LOW during address contention. When M/S = LOW, it operates as slave: BUSYL/BUSYR become inputs sampled by internal arbitration logic to resolve priority-no external driver required.

Is data retention guaranteed during power loss, and what conditions apply?

Yes-data retention is guaranteed down to VCCDR = 2.0 V with ISB3 ≤ 0.5 mA. To maintain retention: CE must be held HIGH within VCC to VCC – 0.2 V, and VCC must remain above 2.0 V. No external capacitor or backup battery is required beyond standard decoupling.