Infineon Technologies CYD09S72V18-167BBXI

Overview

CYD09S72V18-167BBXI from Cypress Semiconductor is a 9-Mbit (128 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 operating at 167 MHz.

For engineers reviewing the CYD09S72V18-167BBXI datasheet, CYD09S72V18-167BBXI pinout, CYD09S72V18-167BBXI application, or CYD09S72V18-167BBXI equivalent, key selection criteria include simultaneous read/write access capability, 72-bit bus width per port, 167 MHz clock support, deterministic busy/flag signaling on address collision, and 484-ball PBGA package compatibility with impedance-matched signal integrity features.

Technical Context

This device implements two fully independent synchronous ports, each supporting pipelined or flow-through read latency modes, with separate chip enables (CE0/CE1), byte enables (BE[7:0]), and echo clocks (CQ0L/CQ1L, CQ0R/CQ1R) to align data capture timing. Address collision detection triggers deterministic flag assertion and first-busy-address readback within one clock cycle.

It integrates variable impedance matching (VIM) on DQ and control pins, supports selectable I/O standards (1.8 V LVCMOS, 2.5 V LVCMOS, Extended HSTL), and includes burst counters with interrupt flags (CNTINTL/CNTINTR) and mailbox registers with interrupt signaling (INTL/INTR) for inter-processor message passing.

Key Specifications

Pinout & Package

Package: 484-ball plastic ball grid array (PBGA), 27 mm × 27 mm, 1.0 mm ball pitch, RoHS-compliant. Pin assignment conforms to FullFlex72 family layout with dedicated left/right port signals, dual chip enables, echo clocks, and VIM configuration balls (ZQ0L/ZQ1L, ZQ0R/ZQ1R).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CYD09S72V18-200BBXI, the -167BBXI variant reduces dynamic power by ~22% at typical loads while retaining full feature parity; versus CYD09S36V18-167BZI, it delivers double the per-cycle throughput in a single package but occupies more PCB area.

Availability

CYD09S72V18-167BBXI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial networking, and defense electronics requiring stable component supply, long-term obsolescence planning, and guaranteed traceability for safety-critical deployments.

Supply support for CYD09S72V18-167BBXI 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 interoperability in industrial and communications markets.

This device belongs to the FullFlex™ Synchronous SDR Dual Port SRAM product line, engineered specifically for deterministic, high-bandwidth inter-processor communication in multi-core telecom and radar systems where latency predictability and signal integrity are non-negotiable.

FAQ

What is the minimum supported I/O voltage for CYD09S72V18-167BBXI?

The device supports 1.8 V LVCMOS I/O as standard, with configurable Extended HSTL (1.4 V to 1.9 V) and 2.5 V LVCMOS options. The absolute minimum valid I/O supply is 1.4 V when configured for Extended HSTL mode, verified per AC electrical characteristics in Rev. *J datasheet Section 21.

Does CYD09S72V18-167BBXI support JTAG boundary scan?

Yes-it implements IEEE 1149.1 JTAG boundary scan with dedicated TDI, TDO, TMS, TCK, and TRST pins (pins W20, W19, Y20, Y19, and V20 respectively), enabling full pin-level interconnect testing and in-system programming verification.

How does deterministic collision arbitration work on this device?

When both ports access the same address simultaneously, BUSYL/BUSYR assert low within one clock cycle; the winning port (determined by internal priority logic) proceeds, while the losing port receives the collided address on its A[16:0] lines and can initiate retry logic without external arbitration circuitry.

Can the burst counter be reset independently per port?

Yes-each port has dedicated CNTRSTL (pin T19) and CNTRSTR (pin T20) inputs. Asserting either resets its respective burst counter to the value loaded into the mirror register, enabling synchronized restart across ports or independent control per subsystem.