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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Cypress Semiconductor Corp CYD18S72V18-167BBXI

Name: CYD18S72V18-167BBXI
Brand: Cypress Semiconductor Corp
SKU: CYD18S72V18-167BBXI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CYD18S72V18-167BBXI

Manufacturer:: Cypress Semiconductor Corp

Category:: Memory

Package:: 256-LBGA

Datasheet:: CYD18S72V18-167BBXI.pdf

Description:: IC SRAM 18MBIT PAR 256FBGA

Quantity:: RFQ Add To RFQ list

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Product details

Overview

CYD18S72V18-167BBXI from Cypress Semiconductor is a 18-Mbit (256 K × 72) synchronous true dual-port SRAM with independent 72-bit SDR interfaces per port, 1.8 V core supply, and deterministic collision arbitration-designed for high-bandwidth inter-processor communication in telecom line cards and packet buffer applications.

For engineers reviewing the CYD18S72V18-167BBXI datasheet, CYD18S72V18-167BBXI pinout, CYD18S72V18-167BBXI application, or CYD18S72V18-167BBXI equivalent, key selection factors include simultaneous 200 MHz SDR access per port, 72-bit bus width, pipelined/flow-through mode selectability, JTAG boundary scan support, and 484-ball PBGA package compatibility.

Technical Context

This device implements two fully independent synchronous ports, each supporting 200 MHz single data rate operation with configurable 2-stage pipelining or flow-through latency. Address collision detection triggers deterministic flag assertion and first-busy address readback on back-to-back clock cycles.

Each port supports selectable I/O standards (1.8 V LVCMOS, 2.5 V LVCMOS, Extended HSTL, LVTTL), variable impedance matching (VIM), echo clocks, burst counters, and mailbox interrupt flags-enabling flexible high-speed memory interfacing in asymmetric multi-processor systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Density	18 Mbit (256 K × 72 bits) - provides 256,000 words of 72-bit wide storage per port.
Max Clock Frequency	200 MHz per port - enables up to 28.8 Gb/s aggregate bandwidth (200 MHz × 72-bit × 2 ports).
Core Supply Voltage	1.8 V ± 0.1 V - low-voltage CMOS design reducing dynamic power while maintaining timing margins.
I/O Voltage Options	Selectable 1.8 V LVCMOS / 2.5 V LVCMOS / Extended HSTL / LVTTL - allows interoperability with diverse logic families.
Access Mode	Pipelined (2-cycle latency) or flow-through (1-cycle latency) per port - configurable via control register for latency vs. throughput trade-off.
Collision Handling	Deterministic flag output + first-busy address readback - ensures predictable arbitration without bus lockup during simultaneous same-address access.
Package	484-ball PBGA (19 mm × 19 mm, 1.0 mm pitch) - standard footprint for high-pin-count synchronous memory in dense PCB layouts.

Pinout & Package

Package: 484-ball plastic BGA (PBGA), 19 mm × 19 mm, 1.0 mm ball pitch, RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
DQ[71:0]L / DQ[71:0]R	Left/Right Port Data Bus	72-bit bidirectional data path per port; supports byte-wise write enable via BE[7:0]L/R.
A[17:0]L / A[17:0]R	Left/Right Port Address Bus	18-bit address inputs - selects one of 256 K locations per port (2¹⁸ = 262,144 ≈ 256 K).
CE0L/CE1L, CE0R/CE1R	Chip Enable Inputs	Dual chip enables per port required to activate I/O; power-down control matches selected read latency cycles.
R/WL / R/WR	Read/Write Control	Active-high signal determining direction on respective port's DQ bus; synchronous with port clock.
OEL / OER	Output Enable	Controls tri-state of DQ outputs independently per port; allows shared bus arbitration.
PORTSTD[1:0]L/R	Port Status Outputs	Indicates port activity state (idle/busy/collision); used for handshake and flow control between processors.
CNTINTL / CNTINTR	Burst Counter Interrupt	Asserts when internal burst counter reaches max count; signals host to reload or process next block.
MRST	Asynchronous Master Reset	Global reset clearing internal registers, counters, and mailboxes without requiring clock.

Key Features

Feature	Design Value
Deterministic collision arbitration	Guarantees resolution within one clock cycle upon simultaneous same-address access, eliminating arbitration uncertainty in real-time systems.
Variable Impedance Matching (VIM)	Programmable output driver impedance (34–75 Ω) matched to PCB trace impedance, reducing signal reflections at 200 MHz.
Independent burst counters per port	Auto-incrementing address generator with mask/wrap control and interrupt flag-reduces CPU overhead in sequential DMA transfers.
Mailbox with interrupt flags	Dedicated memory regions with INTL/INTR signaling enable zero-copy message passing between asymmetric processors without polling.
JTAG IEEE 1149.1 boundary scan	Fully compliant test access port supporting chain configuration, interconnect testing, and in-system debug of SRAM interface traces.

Applications

Telecom Line Card Buffering

Network Packet Processor Interface

Use Scenario: High-speed packet buffering between ingress and egress ASICs in 10G/40G line cards.

IC Role / Device Role / Timing Role: Dual-port SRAM acts as non-blocking shared memory with independent read/write ports synchronized to separate clock domains.

Use Value: Enables concurrent packet enqueue/dequeue at 200 MHz per port, eliminating FIFO bottlenecks and supporting line-rate forwarding.

Use Scenario: Inter-processor communication between control-plane CPU and data-plane NPU in programmable switches.

IC Role / Device Role / Timing Role: Serves as mailbox and descriptor ring buffer with deterministic collision handling for command/response exchange.

Use Value: Reduces software overhead via burst counter auto-addressing and mailbox interrupts-cutting inter-core latency by >40% vs. polled registers.

Industrial PLC Real-Time I/O Hub

Radar Signal Processing Memory

Use Scenario: Shared memory for deterministic I/O scanning across multiple real-time controllers in modular PLC chassis.

IC Role / Device Role / Timing Role: Provides time-triggered access to I/O image memory with collision flag signaling for fault-safe arbitration.

Use Value: Ensures worst-case access latency ≤2 cycles under contention-meeting IEC 61131-3 cycle-time guarantees.

Use Scenario: Frame-level ping-pong buffering between ADC capture engine and FFT accelerator in phased-array radar.

IC Role / Device Role / Timing Role: Dual-port architecture allows simultaneous streaming capture (port L) and processing (port R) at 200 MHz.

Use Value: Eliminates external FIFOs and reduces system latency by 3.2 ns per access versus discrete latch-based solutions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CYD18S72V18-200BBXI	200 MHz rated (vs. 167 MHz), identical pinout and feature set	Supports higher sustained bandwidth but requires tighter timing closure on PCB	Select when system clock margin allows full 200 MHz operation and jitter tolerance is < 50 ps.
IS61VPS51272	18-Mbit (512 K × 36), 36-bit bus width, 167 MHz max, different pinout and no mailbox/JTAG	Limited to 36-bit interfaces; lacks burst counter, mailbox, and boundary scan features	Choose only for cost-sensitive designs where 72-bit width and advanced features are unnecessary.

Compared with CYD18S72V18-200BBXI, the -167BBXI offers relaxed timing margins for robust operation in thermally varying environments; versus IS61VPS51272, it delivers 2× data width, deterministic arbitration, and integrated debug infrastructure-justifying premium cost in high-reliability systems.

Availability

CYD18S72V18-167BBXI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and radar signal processing requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

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

CYD18S72V18 belongs to the FullFlex™ SDR Dual Port SRAM product line-engineered specifically for deterministic, low-latency inter-processor memory sharing in multi-clock-domain systems.

FAQ

What is the maximum supported I/O voltage for CYD18S72V18-167BBXI?

The device supports four I/O voltage standards per port: 1.8 V LVCMOS, 2.5 V LVCMOS, Extended HSTL (1.4–1.9 V), and LVTTL (3.3 V). Selection is configured via the CONFIG block and does not require external level shifters-enabling direct interface to FPGAs, ASICs, and microprocessors with mixed I/O voltages.

How does deterministic collision arbitration work in practice?

When both ports access the same address on the same clock edge, the device asserts BUSYL/BUSYR and PORTSTD[1:0] flags within one cycle, outputs the colliding address on A[17:0], and latches it for readback. No arbitration delay or retry logic is needed-the host reads the busy address and reissues the request to an alternate location.

Can the burst counter be used across both ports simultaneously?

No-the burst counter is port-specific (CNT/MSKL/CNTENL on left port; CNT/MSKR/CNTENR on right port). Each counter operates independently with its own mirror register, wrap control, and interrupt flag (CNTINTL/CNTINTR), enabling parallel sequential access streams without cross-port interference.

Is JTAG boundary scan supported during normal operation?

Yes-IEEE 1149.1 boundary scan operates concurrently with memory functions. TDI/TDO/TCK/TMS/TRST pins remain active regardless of CE or MRST state, allowing in-system test and debug without halting application traffic or resetting the SRAM array.

CYD18S72V18-167BBXI Specifications

Product attributes: Attribute value

Manufacturer:: Cypress Semiconductor Corp

Series:: -

Package/Case:: 256-LBGA

Packaging:: Bulk

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Dual Port, Synchronous

Memory Size:: 18Mbit

Memory Organization:: 256K x 72

Memory Interface:: Parallel

Clock Frequency:: 167 MHz

Write Cycle Time - Word, Page:: -

Access Time:: 4 ns

Voltage - Supply:: 1.42V ~ 1.58V, 1.7V ~ 1.9V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 256-FBGA (17x17)

CYD18S72V18-167BBXI FAQ

1.How can I place an order for CYD18S72V18-167BBXI through Aetrix?

Please submit a Request for Quotation (RFQ) for CYD18S72V18-167BBXI on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for CYD18S72V18-167BBXI reliable?

The price and inventory of CYD18S72V18-167BBXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYD18S72V18-167BBXI is usually 5 days.

3.What payment methods are accepted for CYD18S72V18-167BBXI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYD18S72V18-167BBXI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CYD18S72V18-167BBXI?

CYD18S72V18-167BBXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CYD18S72V18-167BBXI order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for CYD18S72V18-167BBXI?

For technical support, including CYD18S72V18-167BBXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYD18S72V18-167BBXI requirements.

6.How does Aetrix verify that CYD18S72V18-167BBXI is sourced from the original manufacturer or authorized distributors?

All CYD18S72V18-167BBXI products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CYD18S72V18-167BBXI meets industry standards.

7.What is the process for return or replacement of CYD18S72V18-167BBXI?

All CYD18S72V18-167BBXI units undergo pre-shipment inspection (PSI). If there is an issue with CYD18S72V18-167BBXI, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The CYD18S72V18-167BBXI part is unused and in its original packaging.

Return procedure for CYD18S72V18-167BBXI:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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