Infineon Technologies CY7C1515KV18-300BZCT

Overview

CY7C1515KV18 from Cypress Semiconductor is a 72-Mbit QDR® II SRAM with 2M × 36 organization, 333 MHz clock support, four-word burst architecture, and dual DDR read/write ports operating at 666 MHz data rate. It delivers concurrent read/write transactions with 1.5-cycle read latency (DOFF = HIGH) and is used in high-bandwidth packet buffering for network switches and routers.

For engineers reviewing the CY7C1515KV18 datasheet, CY7C1515KV18 pinout, CY7C1515KV18 application, or CY7C1515KV18 equivalent, key selection criteria include its 165-ball FBGA package, 1.8 V core / 1.4–1.8 V I/O supply compatibility, echo clock (CQ/CQ) support for timing margin recovery, and depth expansion via RPS/WPS controls.

Technical Context

The CY7C1515KV18 implements a synchronous pipelined QDR II architecture with physically separate read and write data paths, eliminating bus turnaround delays. Its 512K × 36 memory array is accessed via a shared 19-bit address bus latched on alternating rising edges of the K clock.

It uses two independent clock domains: K/K for address/data input synchronization and C/C for output data capture, with echo clocks (CQ/CQ) aligned to Q[35:0] outputs to simplify high-speed receiver design. The integrated PLL ensures precise data placement relative to output clocks.

Key Specifications

Pinout & Package

Package: 165-ball fine-pitch ball grid array (FBGA), 13 mm × 15 mm × 1.4 mm body, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L10BG and IS61WV102432BLL-150BLI, the CY7C1515KV18 uniquely delivers 333 MHz operation with echo clocks and true dual-port concurrency-making it the only choice for systems requiring >20 GB/s sustained bidirectional bandwidth with sub-200 ps timing margin.

Availability

CY7C1515KV18 is available at Aetrix Electronics and suitable for network packet buffering, high-speed test equipment memory, telecom baseband processing, and FPGA co-processor cache applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for CY7C1515KV18 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 networking, automotive, and industrial systems, with emphasis on signal integrity and timing robustness.

The QDR® II SRAM product line targets high-throughput, low-latency data buffering in infrastructure equipment where deterministic timing, concurrent access, and scalable bandwidth are mandatory.

FAQ

What is the function of the DOFF pin on CY7C1515KV18?

The DOFF (Data Output OFFset) pin configures read latency mode: when asserted HIGH, it enables 1.5-cycle read latency for improved timing margin; when LOW, it selects 1-cycle latency for minimal delay. This setting is sampled at power-up and remains static during operation-no runtime reconfiguration is supported.

Can CY7C1515KV18 operate with only a single clock input (K only)?

Yes-the device supports single-clock-domain operation using only the K input clock for both input sampling and output data timing. In this mode, Q[35:0] is clocked by K/K instead of C/C, and echo clocks (CQ/CQ) remain functional but track K/K rather than C/C. Full performance (333 MHz) is maintained, though flight-time deskew capability is reduced.

How does byte write select (BWS) work with the 36-bit data bus?

BWS[3:0] controls four independent 8-bit segments of D[35:0]: BWS0 → D[7:0], BWS1 → D[15:8], BWS2 → D[23:16], BWS3 → D[31:24]. D[35:32] are not byte-selectable and always written when WPS is active. Unselected bytes retain their prior values-no read-modify-write cycle is needed.

Is JTAG boundary scan supported on CY7C1515KV18, and what pins are used?

Yes-CY7C1515KV18 implements IEEE 1149.1 JTAG with TDI, TDO, TCK, and TMS routed to dedicated balls (R10, R9, R11, R12). The TAP controller supports instruction register loading, data register scan, and boundary scan testing of all I/O pins except power/ground and NC balls. JTAG can be disabled via fuse or strap option.