Cypress Semiconductor Corp CYD09S18V18-167BBXC

Overview

CYD09S18V18-167BBXC from Cypress Semiconductor is a 9-Mbit synchronous true dual-port SRAM (512 K × 18) with independent 18-bit ports, 1.8 V core supply, and SDR operation at 167 MHz. It supports deterministic collision resolution, mailbox-based inter-processor communication, and burst counter–assisted sequential access-used in high-speed packet buffering and FPGA co-processor memory interfaces.

For engineers reviewing the CYD09S18V18-167BBXC datasheet, CYD09S18V18-167BBXC pinout, CYD09S18V18-167BBXC application, or CYD09S18V18-167BBXC equivalent, key selection criteria include dual-port bandwidth, deterministic arbitration latency, byte-enable granularity, I/O voltage flexibility (1.8 V LVCMOS), and 256-ball FBGA (13 × 13 mm) package compatibility for space-constrained embedded systems.

Technical Context

This device implements two fully independent synchronous ports sharing a single 512 K × 18 memory array. Each port features configurable pipelined or flow-through read latency (1–3 cycles), separate chip enables (CE0/CE1), and dedicated echo clocks (CQ0/CQ1) to align data capture timing at high speed.

Collision detection is deterministic and cycle-accurate: simultaneous accesses to the same address trigger BUSY flag assertion and first-busy address readback on the next clock cycle. The mailbox subsystem uses interrupt flags (INTL/INTR) and dual 18-bit registers for lock-free message passing between host processors.

Key Specifications

Pinout & Package

The CYD09S18V18-167BBXC is housed in a 256-ball fine-pitch BGA (FBGA) package compliant with JEDEC MO-245, 13 mm × 13 mm body, 0.8 mm ball pitch. Pin functions are defined per port (Left/Right), with dedicated address, data, control, and timing signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CYD09S18V18-200BBXC, this -167BBXC variant trades 33 MHz bandwidth for relaxed timing closure and lower power; versus IS61WV51218BLL-10TLI, it delivers deterministic latency, built-in burst logic, and 1.8 V compatibility-reducing BOM count and improving real-time predictability.

Availability

CYD09S18V18-167BBXC is available at Aetrix Electronics and suitable for telecom packet buffering, FPGA co-processor memory, and industrial motion control requiring stable component supply across extended product lifecycles.

Supply support for CYD09S18V18-167BBXC 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 embedded and industrial systems, emphasizing signal integrity, low-power operation, and system-level integration.

The FullFlex™ SDR Dual Port SRAM product line targets applications demanding deterministic latency, high-bandwidth inter-processor communication, and flexible I/O voltage support-specifically engineered for FPGA-ASIC co-processing, telecom infrastructure, and real-time control systems.

FAQ

What is the minimum supported I/O voltage for CYD09S18V18-167BBXC?

The device supports 1.8 V LVCMOS I/O only-no 2.5 V or 3.3 V modes. VDDIO must be regulated to 1.8 V ± 5% (1.71–1.89 V). This is confirmed in the Electrical Characteristics table (Section 19) and pin function definitions for VDDIOL/VDDIOR. Operation outside this range risks data corruption or latch-up.

Does CYD09S18V18-167BBXC support flow-through read mode?

Yes-it supports both pipelined (default) and flow-through read modes via configuration register settings. Flow-through mode reduces read latency to 1 clock cycle but limits maximum operating frequency to 133 MHz. This trade-off is documented in the Functional Description section and AC timing tables (pages 26–29).

How is collision detection implemented physically?

Collision detection uses hardware comparators that monitor A[18:0]L and A[18:0]R on every rising clock edge. If addresses match and both ports are active (CE asserted), BUSYL/BUSYR assert within 1 ns, and the matching address appears on AD[18:0]L/R on the next cycle. This deterministic behavior is verified in the Logic Block Diagram (page 2) and Collision Detection Logic description.

Can the burst counter be reset independently per port?

Yes-each port has dedicated CNTRSTL and CNTRSTR pins. Asserting CNTRSTL resets the left-port counter to the value in the mirror register; CNTRSTR does the same for the right port. This is explicitly defined in the Pin Definitions table (page 9) and functional description of the Address & Counter Logic block (page 2).