Cypress Semiconductor Corp CY7C1315KV18-250BZXI

Overview

CY7C1315KV18-250BZXI from Cypress Semiconductor is a 512K × 36-bit, 18-Mbit QDR® II SRAM with four-word burst architecture, 250 MHz maximum operating frequency (40 ns clock period), 1.8 V core supply, and 1.4–1.8 V I/O supply. It features separate read/write ports, DDR interfaces on both ports (500 Mbps per data pin), echo clocks (CQ/CQ), and DOFF-selectable 1-cycle or 1.5-cycle read latency. Used in high-bandwidth packet buffering for network switches and routers.

For engineers reviewing the CY7C1315KV18-250BZXI datasheet, CY7C1315KV18-250BZXI pinout, CY7C1315KV18-250BZXI application, or CY7C1315KV18-250BZXI equivalent, key selection criteria include concurrent read/write capability, 36-bit wide DDR data interface, FBGA-165 package compatibility, and QDR II timing compliance for backplane interconnects.

Technical Context

The device implements true dual-port synchronous pipelined architecture with independent K/K input clocks for address/data capture and C/C output clocks for data launch, enabling full concurrency without bus turnaround. Its internal 4-array organization (4 × 128K × 36) supports depth expansion via WPS/RPS and byte-level write control using BWS[3:0].

Read operations are synchronized to C/C rising edges with programmable latency (1 or 1.5 cycles via DOFF), while writes use self-timed internal circuitry and support partial writes via active BWS signals. Echo clocks CQ/CQ align with Q[35:0] output timing to simplify high-speed capture at the receiver.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body, 0.8 mm ball pitch, RoHS-compliant Pb-free finish (BZXI suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar QDR II SRAM applications.

Compared with IDT72T3615L10BG and IS61QW25636A-250BQI, CY7C1315KV18-250BZXI uniquely supports configurable 1/1.5-cycle read latency and integrated echo clocks-critical for FPGA-based systems requiring timing closure at 500 MT/s.

Availability

CY7C1315KV18-250BZXI is available at Aetrix Electronics and suitable for network switching, high-speed test instrumentation, telecom baseband processing, and defense radar signal processing requiring stable component supply across extended product lifecycles.

Supply support for CY7C1315KV18-250BZXI 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 applications, with focus on low-power, high-reliability silicon.

CY7C1315KV18 belongs to the QDR® II SRAM product line, engineered specifically for deterministic, concurrent read/write bandwidth in packet infrastructure and real-time signal processing systems.

FAQ

What is the function of the DOFF pin on CY7C1315KV18-250BZXI?

The DOFF (Data Output OFFset) pin selects read latency mode: when asserted HIGH, it configures 1.5-cycle latency for improved timing margin; when LOW, it enables 1-cycle latency for minimal pipeline delay. This setting directly affects controller state machine design and must be held stable during operation.

Does CY7C1315KV18-250BZXI support JTAG boundary scan?

Yes, it implements IEEE 1149.1 compliant TAP controller with TDI, TDO, TCK, and TMS pins. Boundary scan supports production testing of solder joints and interconnects in dense FBGA layouts, and is enabled by default unless disabled via instruction register.

How many address bits are required for CY7C1315KV18-250BZXI's 512K × 36 organization?

17 address bits (A[16:0]) are required. The device internally organizes memory as four 128K × 36 arrays, and all address lines are multiplexed for both read and write ports via a single synchronous address bus.

What is the purpose of the BWS[3:0] signals?

BWS[3:0] are active-LOW byte write select signals controlling four 9-bit segments of the 36-bit data bus. When a BWS bit is deasserted, the corresponding 9-bit byte is masked during write operations, preserving existing data in those bits without requiring a read-modify-write sequence.