Cypress Semiconductor Corp CYD18S72V18-167BGC

Overview

CYD18S72V18-167BGC 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 484-ball PBGA packaging. It enables simultaneous read/write access from two independent controllers in high-bandwidth networking, packet buffering, and FPGA co-processing applications.

For engineers reviewing the CYD18S72V18-167BGC datasheet, CYD18S72V18-167BGC pinout, CYD18S72V18-167BGC application, or CYD18S72V18-167BGC equivalent, key selection criteria include 72-bit bus width per port, pipelined/flow-through mode configurability, VIM-enabled signal integrity, mailbox-interrupt message passing, and deterministic busy-flag collision resolution.

Technical Context

This device implements a true dual-port architecture with fully independent left/right ports-each supporting 72-bit data, 18 address bits (256 K depth), and configurable 2-stage pipelining. Collision detection occurs on back-to-back clock cycles, triggering deterministic flag assertion and first-busy-address readback via address lines.

Each port supports selectable I/O standards (1.8 V LVCMOS, 2.5 V LVCMOS, Extended HSTL, LVTTL), variable impedance matching (VIM) for line termination control, echo clocks for timing margin improvement, and burst counters with interrupt flags for sequential access acceleration.

Key Specifications

Pinout & Package

The CYD18S72V18-167BGC is housed in a 484-ball plastic BGA (PBGA) package with 0.8 mm ball pitch. Pin functions are asymmetrically distributed across left (L) and right (R) ports, each with dedicated address, data, control, and timing signals-including dual chip enables (CE0/CE1), read/write strobes (R/WL/R/WR), echo clocks (CQ0/CQ1), and impedance calibration balls (ZQ0/ZQ1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CYD18S36V18-167BGC, the CYD18S72V18-167BGC delivers double per-port bandwidth without depth expansion; versus IS61WV102472BLL-167BGI, it adds synchronous timing control, collision management, and advanced signal integrity features essential for new high-speed designs.

Availability

CYD18S72V18-167BGC is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and test equipment requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for CYD18S72V18-167BGC 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 demanding embedded and communications applications.

The FullFlex™ SDR Dual Port SRAM product line targets systems needing deterministic, high-bandwidth shared memory between independent processors or data paths-optimized for networking, real-time control, and instrumentation.

FAQ

What is the maximum supported clock frequency for CYD18S72V18-167BGC?

The device is rated for 200 MHz operation on both ports, delivering 200 million transfers per second per port. This frequency is validated across commercial and industrial temperature ranges with 1.8 V core supply and specified AC loading conditions per datasheet Figure 26.

Does CYD18S72V18-167BGC support independent I/O voltage settings per port?

Yes-each port supports independent selection among 1.8 V LVCMOS, 2.5 V LVCMOS, Extended HSTL (1.4–1.9 V), and LVTTL (3.3 V) I/O standards via configuration pins, enabling direct interfacing with mixed-voltage system components without level shifters.

How does deterministic collision arbitration work in this SRAM?

When both ports access the same address on consecutive cycles, the device asserts BUSYL/BUSYR within one clock cycle and places the conflicting address on the address bus during the next read cycle. Priority is fixed per port (left wins tie-breaks), ensuring bounded latency for safety-critical systems.

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

Yes-the device integrates IEEE 1149.1-compliant JTAG boundary scan with TDI, TDO, TMS, TCK, and TRST pins. It supports full pin visibility and interconnect testing, and is verified per Cypress Document Number 38-06082 Rev. *J Section 18.