Infineon Technologies CYD09S18V18-167BBXI

Overview

CYD09S18V18-167BBXI from Cypress Semiconductor is a 9-Mbit (512K × 18) synchronous true dual-port SRAM with independent 18-bit-wide ports, 1.8 V/1.5 V core supply, and SDR operation up to 167 MHz. It supports deterministic collision resolution, burst counters, mailbox messaging, and JTAG boundary scan - deployed in high-speed packet buffering, FPGA co-processing, and telecom line-card data exchange.

For engineers reviewing the CYD09S18V18-167BBXI datasheet, CYD09S18V18-167BBXI pinout, CYD09S18V18-167BBXI application, or CYD09S18V18-167BBXI equivalent, key selection criteria include dual-port latency matching, byte-enable granularity (2 BE per port), echo clock support for timing margin improvement, and 256-ball FBGA package compatibility with industrial temperature range (–40°C to +85°C).

Technical Context

This device implements pipelined or flow-through read/write modes per port, with configurable latency (1–3 cycles) and deterministic access control that outputs a busy flag and readable first-busy address upon simultaneous access to the same location. Each port features independent I/O voltage support (1.8 V LVCMOS, 2.5 V LVCMOS, or extended HSTL), variable impedance matching (VIM), and echo clocks for source-synchronous timing alignment.

The logic block includes dual 19-bit address counters with mask/retx/mirror registers, CNTINT interrupt flags, and dual mailboxes with INTR/BUSY signaling. Collision detection operates on back-to-back clock cycles, and chip enables (CE0/CE1 per port) power down internal circuitry with latency-matched bus release.

Key Specifications

Pinout & Package

Package: 256-ball Fine-Pitch BGA (FBGA), 15 mm × 15 mm, 1.0 mm ball pitch, RoHS-compliant. Pinout conforms to FullFlex18 family layout with dedicated left/right port signals, dual chip enables, echo clocks (CQ0L/CQ1L, CQ0R/CQ1R), and ZQ calibration balls (ZQ0L/ZQ0R) for VIM.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CYD09S18V18-200BBXI, the -167BBXI trades 33 MHz bandwidth for relaxed timing closure and lower power; versus IS61WV51218BLL-10MLI, it adds deterministic arbitration, echo clocks, and mailbox messaging at the cost of higher complexity and 1.8 V dependency.

Availability

CYD09S18V18-167BBXI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, medical imaging, and FPGA-accelerated embedded systems requiring stable component supply across multi-year production cycles.

Supply support for CYD09S18V18-167BBXI 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 systems, emphasizing reliability, low power, and integration.

The FullFlex™ SDR Dual-Port SRAM product line targets applications demanding concurrent, deterministic memory access - especially in FPGA-based accelerators, network processors, and real-time industrial controllers where arbitration latency is unacceptable.

FAQ

What is the minimum supported core voltage for CYD09S18V18-167BBXI?

The device operates at either 1.5 V ± 0.1 V or 1.8 V ± 0.1 V core supply - no operation is guaranteed below 1.4 V or above 1.9 V. Both voltages are fully supported across the industrial temperature range, with timing specifications validated at each level.

Does CYD09S18V18-167BBXI support flow-through mode on both ports simultaneously?

Yes - each port can be independently configured for pipelined (default) or flow-through read mode via the CONFIG block. Flow-through mode reduces read latency to 1 cycle but disables burst counter functionality on that port.

How is collision detection implemented when both ports access the same address?

On back-to-back clock cycles, the device asserts BUSYL or BUSYR and outputs the colliding address on A[18:0] lines. The first-busy address is latched and readable within one cycle - no software polling or external arbitration logic is required.

Can ZQ0L and ZQ0R be left unconnected if VIM is not used?

Yes - leaving ZQ0L and ZQ0R unconnected disables Variable Impedance Matching. Output drivers then operate at nominal impedance (35 Ω typical), which remains sufficient for most 50 Ω trace environments at ≤133 MHz; calibration is recommended above that frequency.