Infineon Technologies CYD18S72V18-250BBXC

Overview

CYD18S72V18-250BBXC from Cypress Semiconductor is a 18-Mbit (256 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 - deployed in high-throughput packet buffering and telecom line card memory subsystems.

For engineers reviewing the CYD18S72V18-250BBXC datasheet, CYD18S72V18-250BBXC pinout, CYD18S72V18-250BBXC application, or CYD18S72V18-250BBXC equivalent, key selection criteria include simultaneous dual-port bandwidth (28.8 Gb/s), pipelined/flow-through mode configurability, JTAG boundary scan compliance, and 484-ball PBGA (×72) package compatibility with deterministic flag signaling on address collision.

Technical Context

This device implements two fully independent synchronous ports, each with 72-bit data width, 18 address bits (256 K depth), and configurable read latency (1–3 cycles). Each port supports selectable pipelined or flow-through operation, enabling flexible timing alignment in asymmetric bus architectures.

Deterministic access control resolves simultaneous accesses to identical addresses via dedicated BUSY/FLAG outputs and first-busy address readback; built-in burst counters, mailbox interrupt flags, and echo clocks further enable high-speed message passing and synchronized data transfers across FPGA or ASIC interconnects.

Key Specifications

Pinout & Package

Package: 484-ball plastic BGA (PBGA), 19 mm × 19 mm, 1.0 mm ball pitch, ×72 configuration. Pinout validated per Figure 1 (Document 38-06082 Rev. *J, Page 4).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CYD18S72V18-250BBXC, CYD18S36V18-250BAXC trades 72-bit bandwidth for smaller footprint and deeper addressing, while IS61WV102472BLL-15BLI sacrifices all advanced synchronization features for lower unit cost and simpler timing validation.

Availability

CYD18S72V18-250BBXC is available at Aetrix Electronics and suitable for telecom infrastructure, network test equipment, and radar signal processing applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for CYD18S72V18-250BBXC 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) designs high-performance memory and programmable solutions for communications, industrial, and automotive markets.

CYD18S72V18 belongs to the FullFlex™ SDR Dual Port SRAM product line, engineered specifically for deterministic, high-bandwidth memory sharing between heterogeneous processors, FPGAs, and ASICs in real-time networking systems.

FAQ

What is the maximum supported clock frequency for CYD18S72V18-250BBXC?

The device is rated for up to 200 MHz on each port under commercial temperature conditions (0 °C to +70 °C) with 1.8 V core supply and specified load conditions. At 1.5 V core, maximum frequency remains 200 MHz per the AC characteristics table in Document 38-06082 Rev. *J, Page 26.

Does CYD18S72V18-250BBXC support JTAG boundary scan testing?

Yes - it integrates IEEE 1149.1-compliant JTAG boundary scan logic with TDI, TDO, TMS, TCK, and TRST pins (pins W21, Y21, Y22, W22, and V22 respectively in 484-ball PBGA), enabling full-board interconnect verification without physical probe access.

How does deterministic collision arbitration work on this device?

When both ports attempt access to the same address on the same clock edge, BUSYL/BUSYR assert within one cycle, and the "first busy" address appears on the address bus on the next cycle. The flag output is guaranteed to be valid before the next clock edge, enabling immediate hardware flow control without software intervention.

Can CYD18S72V18-250BBXC operate with different I/O voltages on left and right ports?

Yes - each port has independent VDDIO supply pins (VDDIOL for left, VDDIOR for right) and supports selectable I/O standards: LVTTL (3.3 V), Extended HSTL (1.4–1.9 V), 1.8 V LVCMOS, or 2.5 V LVCMOS. This allows direct connection to mismatched logic families without external level shifters.