Infineon Technologies CYD09S72V18-250BBXC

Overview

CYD09S72V18-250BBXC from Cypress Semiconductor is a 9-Mbit (128 K × 72) synchronous true dual-port SRAM with independent 72-bit SDR interfaces per port, 200 MHz clock support, deterministic collision arbitration, and 1.5 V/1.8 V core supply-designed for high-bandwidth inter-processor communication in telecom line cards and packet buffering systems.

For engineers reviewing the CYD09S72V18-250BBXC datasheet, CYD09S72V18-250BBXC pinout, CYD09S72V18-250BBXC application, or CYD09S72V18-250BBXC equivalent, key selection criteria include simultaneous dual-port latency behavior, byte-enable granularity (8×), echo clock timing margin, VIM impedance tuning capability, and mailbox interrupt support for lock-free message passing.

Technical Context

This device implements two fully independent SDR ports operating at up to 200 MHz, each with 72 data bits, 17 address bits (128 K depth), and eight byte enables. Each port supports selectable pipelined (2-cycle read latency) or flow-through mode, with deterministic collision resolution via busy flag assertion and first-busy address readback.

It integrates on-die features including burst counters with wrap control, mailbox registers with interrupt flags, JTAG boundary scan (IEEE 1149.1), and variable impedance matching (VIM) for signal integrity optimization. Core voltage is 1.5 V or 1.8 V; I/O supports LVTTL, Extended HSTL, 1.8 V LVCMOS, or 2.5 V LVCMOS per port.

Key Specifications

Pinout & Package

Package: 484-ball PBGA (19 mm × 19 mm, 1.0 mm pitch), RoHS-compliant, thermal pad exposed on bottom. Pin mapping conforms to FullFlex72 family layout with dedicated left/right port signals, dual chip enables (CE0/CE1 per port), echo clocks (CQ0/CQ1), and ZQ calibration balls for VIM.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CYD09S72V18-250BBXC, the BAXC variant trades package size for bus width reduction, while IS61VPS51272 sacrifices speed, feature set, and signal integrity tooling for lower unit cost-making CYD09S72V18-250BBXC optimal for high-performance, feature-rich embedded systems.

Availability

CYD09S72V18-250BBXC is available at Aetrix Electronics and suitable for telecom infrastructure, multi-core SoC prototyping, network security appliances, and radar signal processing systems requiring stable component supply across extended product lifecycles.

Supply support for CYD09S72V18-250BBXC 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.

CYD09S72V18 belongs to the FullFlex™ SDR Dual Port SRAM product line, engineered specifically for deterministic, low-latency, high-bandwidth inter-processor and inter-subsystem communication in carrier-grade and mission-critical embedded systems.

FAQ

What is the maximum supported clock frequency for CYD09S72V18-250BBXC?

The device supports up to 200 MHz on each port under commercial temperature conditions (0°C to +70°C) with 1.8 V core supply and specified AC timing parameters. At 1.5 V core, maximum frequency is derated to 166 MHz per the datasheet's electrical characteristics table. All timing values assume proper termination, echo clock usage, and VIM calibration.

Does CYD09S72V18-250BBXC support independent I/O voltage settings per port?

Yes-each port supports independent selection among LVTTL (3.3 V), Extended HSTL (1.4–1.9 V), 1.8 V LVCMOS, or 2.5 V LVCMOS via configuration pins (VTTL, VREFL/VREFR). This enables direct interfacing with heterogeneous logic families without external level shifters, verified in the "Electrical Characteristics" section of Rev. *J datasheet.

How does deterministic collision arbitration work in practice?

When both ports assert valid addresses to the same location on the same clock edge, the device immediately asserts BUSYL and BUSYR, drives the conflicting address onto A[16:0]L/R, and sets the CNTINTL/CNTINTR flag if enabled. The host reads the busy address on the next cycle, avoiding race conditions-confirmed in the Functional Description and Logic Block Diagram (page 2).

Is JTAG boundary scan supported, and what standard does it comply with?

Yes-CYD09S72V18-250BBXC implements IEEE 1149.1 JTAG boundary scan with TCK, TMS, TDI, TDO, and TRST pins. It supports full pin visibility and interconnect testing per the standard, documented in Section "IEEE 1149.1 Serial Boundary Scan" (page 18) of the datasheet, with no vendor-specific extensions required.