Infineon Technologies CYD18S36V18-200BBAXI

Overview

CYD18S36V18-200BBAXI from Cypress Semiconductor is a 18-Mbit (512K × 36) synchronous true dual-port SRAM with independent 36-bit ports, 200 MHz SDR interface, deterministic collision control, and configurable I/O standards including 1.8 V LVCMOS and Extended HSTL. It operates at 1.5 V or 1.8 V core voltage and supports industrial temperature range (–40 °C to +85 °C), targeting high-speed packet buffering in telecom line cards.

For engineers reviewing the CYD18S36V18-200BBAXI datasheet, CYD18S36V18-200BBAXI pinout, CYD18S36V18-200BBAXI application, or CYD18S36V18-200BBAXI equivalent, key selection criteria include simultaneous port access timing, pipelined/flow-through mode selection, echo clock support, burst counter functionality, and JTAG boundary scan compliance for system-level testability.

Technical Context

This device implements a synchronous dual-port architecture with two independent address/data buses, each supporting single-data-rate operation up to 200 MHz. Collision detection is deterministic and generates a flag plus busy address readback on back-to-back clock cycles.

Each port features selectable pipelined (two-stage) or flow-through latency modes, variable impedance matching (VIM) for signal integrity, echo clocks for timing margin improvement, and per-port I/O standard selection across LVTTL, 1.8 V LVCMOS, 2.5 V LVCMOS, and Extended HSTL (pre-WW1830).

Key Specifications

Pinout & Package

Package: 256-ball Fine-Pitch BGA (FBGA), 15 mm × 12 mm, 0.8 mm ball pitch, RoHS-compliant, thermal pad exposed on bottom.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61VPS51236A-200BQI and SN74V293-20PAG, CYD18S36V18-200BBAXI provides deterministic arbitration, per-port I/O flexibility, and embedded timing aids (echo clocks, VIM), making it uniquely suited for new designs requiring robust multi-processor coherency and signal integrity at 200 MHz.

Availability

CYD18S36V18-200BBAXI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, medical imaging, and automated test equipment requiring stable component supply across extended product lifecycles.

Supply support for CYD18S36V18-200BBAXI 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 connectivity solutions for industrial, automotive, and communications markets.

CYD18S36V18 belongs to the FullFlex™ SDR Dual-Port SRAM product line, designed specifically for systems demanding simultaneous, deterministic, high-bandwidth memory access between heterogeneous processors or data paths.

FAQ

What is the maximum supported I/O voltage for CYD18S36V18-200BBAXI?

The device supports four I/O standards per port: LVTTL (3.3 V), 2.5 V LVCMOS, 1.8 V LVCMOS, and Extended HSTL (1.4–1.9 V). The actual I/O voltage is set by VDDIOx (VDDIOL/VDDIOR) and PORTSTD pins; 1.8 V LVCMOS is the default and most commonly used configuration for modern FPGA interfaces.

Does CYD18S36V18-200BBAXI support asynchronous reset?

Yes-it includes an asynchronous Master Reset (MRST) input that forces all internal registers, counters, and flags into known states regardless of clock phase. MRST is active-low and must be held low for ≥100 ns to ensure complete initialization of the deterministic access control logic and mailbox registers.

How does the burst counter function without external clock domain crossing logic?

The burst counter operates synchronously with its associated port's clock (CLKL/CLKR); CNTINT asserts one cycle before counter overflow, and the current address is placed on A[19:0] during the next read cycle. No handshake or domain-crossing circuitry is needed because counter state and interrupt are fully contained within the port's clock domain.

Can CYD18S36V18-200BBAXI be used in place of a 512K × 32 SRAM?

No-this device has a fixed 36-bit data width per port. Using it as a 32-bit replacement would waste 4 bits per access and require external logic to mask or remap DQ[35:4]. For 32-bit systems, consider CYD18S36V18's sibling CYD18S32V18 (if available) or redesign to leverage the full 36-bit width for enhanced throughput.