Infineon Technologies CYD36S18V18-167BGXC

Overview

CYD36S18V18-167BGXC from Cypress Semiconductor is a 36-Mbit synchronous true dual-port SRAM organized as 2,048 K × 18 bits per port, operating at 167 MHz SDR with 1.8 V/1.5 V core supply and configurable I/O standards including 1.8 V LVCMOS and Extended HSTL. It supports deterministic collision resolution, burst counters, mailbox messaging, and JTAG boundary scan - deployed in high-throughput packet buffering and FPGA co-processor memory interfaces.

For engineers reviewing the CYD36S18V18-167BGXC datasheet, CYD36S18V18-167BGXC pinout, CYD36S18V18-167BGXC application, or CYD36S18V18-167BGXC equivalent, key selection considerations include simultaneous dual-port bandwidth (6.0 Gb/s aggregate), pipelined vs. flow-through latency mode, byte-enable granularity (2 per port), echo clock support for timing margin improvement, and deterministic busy-flag behavior during address collisions.

Technical Context

This device implements a synchronous dual-port architecture with independent left/right ports, each supporting 18-bit data width, 21-bit addressing (A0–A20), and two-byte enables (BE0–BE1). Each port features configurable pipelined or flow-through read latency (1–3 cycles) and supports burst counter operation with wrap control via mask/mirror registers.

Collision detection is deterministic: when both ports access the same address on back-to-back clocks, the device asserts BUSYL/BUSYR flags and provides first-busy address readback on the address bus. Built-in echo clocks (CQ0L/CQ1L, CQ0R/CQ1R) align output timing to input clocks, reducing setup/hold violations in high-speed PCB layouts.

Key Specifications

Pinout & Package

Package: 256-ball Fine-Pitch BGA (FBGA), 1.0 mm ball pitch, RoHS-compliant, thermal pad exposed on bottom (not electrically connected). Dimensions: 15 mm × 13 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61WV102418BLL-167TQLI, CYD36S18V18-167BGXC adds deterministic collision resolution, echo clocks for timing margin, and mailbox interrupts - critical for real-time FPGA-processor coherency. The MT28EW01GABA1HPC-0SIT is not a functional substitute due to lack of true dual-port architecture and synchronous interface.

Availability

CYD36S18V18-167BGXC is available at Aetrix Electronics and suitable for telecom packet buffering, FPGA co-processor memory, industrial motion control, and ATE pattern storage requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for CYD36S18V18-167BGXC 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 industrial, automotive, and communications systems, with emphasis on reliability and integration.

CYD36S18V18 belongs to the FullFlex™ Synchronous SDR Dual Port SRAM product line, engineered specifically for deterministic, low-latency memory sharing between heterogeneous processors, FPGAs, and ASICs in real-time embedded systems.

FAQ

What is the maximum supported I/O voltage for CYD36S18V18-167BGXC?

The device supports four selectable I/O standards per port: 1.8 V LVCMOS, Extended HSTL (1.4–1.9 V), 2.5 V LVCMOS, and LVTTL (3.3 V). Core voltage remains fixed at either 1.5 V or 1.8 V. I/O voltage selection is configured via CONFIG block settings at power-up and cannot be changed dynamically during operation.

Does CYD36S18V18-167BGXC support asynchronous reset of internal counters and mailboxes?

Yes - the MRST (Master Reset) pin provides asynchronous, active-low global reset that clears all internal registers, burst counters, mailbox contents, and status flags (BUSY, CNTINT, INTR). This occurs independently of clock or chip enable states and meets JEDEC JESD78 Class II requirements for reset robustness.

How does the deterministic collision detection work when both ports access the same address?

When left and right ports assert identical addresses on consecutive clock edges, the device immediately asserts BUSYL and BUSYR low, places the collided address on the A[20:0] bus, and latches it for one cycle. No arbitration delay or retry is required - the flags serve as hardware handshake signals for external logic or interrupt controllers.

Can the burst counter operate across the full 2,048 K address range without wrap-around?

Yes - the 21-bit burst counter supports counting from 0x00000 to 0x1FFFF (2,097,151), exceeding the 2,048 K (2,097,152) depth. Wrap behavior is controlled by the mask register: setting all mask bits to 1 disables wrap, allowing linear increment up to maximum count before CNTINT assertion.