Cypress Semiconductor Corp CY7C1513KV18-250BZC

Overview

CY7C1513KV18-250BZC from Cypress Semiconductor is a 4M × 18, 72-Mbit QDR® II SRAM with four-word burst architecture, 250 MHz maximum clock frequency (K/K), 500 MHz DDR data rate (1.0 Gbps per port), and 1.8 V core / 1.4–1.8 V I/O supply. It implements separate read/write ports with echo clocks (CQ/CQ) and supports concurrent transactions in high-bandwidth networking buffers.

For engineers reviewing the CY7C1513KV18-250BZC datasheet, CY7C1513KV18-250BZC pinout, CY7C1513KV18-250BZC application, or CY7C1513KV18-250BZC equivalent, key selection criteria include 1.5-cycle read latency (DOFF = HIGH), synchronous self-timed writes, JTAG 1149.1 test access, and 165-ball FBGA (13 × 15 × 1.4 mm) package compatibility with depth expansion via RPS/WPS.

Technical Context

This QDR II SRAM uses dual independent clock domains: K/K for address/data capture and C/C for output timing, enabling precise DDR edge alignment without bus turnaround. Its internal 4M × 18 memory array is organized as four 1M × 18 sub-arrays, accessed via 20-bit multiplexed address bus (A[19:0]) latched on alternating K-clock edges.

The device integrates a PLL for accurate data placement, HSTL-class variable-drive output buffers, and programmable impedance control. Echo clocks (CQ/CQ) are phase-aligned with output data to simplify receiver capture at 500 MHz, while DOFF pin selects between 1-cycle (DOFF = LOW) and 1.5-cycle (DOFF = HIGH) read latency modes.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L10PA and IS61WV102418BLL-15BLI, CY7C1513KV18-250BZC delivers 2.5× higher bandwidth, deterministic 1.5-cycle latency, and integrated echo clocks-critical for 10G+ packet processing where timing closure and jitter tolerance define system feasibility.

Availability

CY7C1513KV18-250BZC is available at Aetrix Electronics and suitable for high-speed packet buffering, optical transport line card memory, base station backplane caching, and protocol accelerator applications requiring stable component supply across extended product lifecycles.

Supply support for CY7C1513KV18-250BZC 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 focus on signal integrity and timing-critical applications.

CY7C1513KV18 belongs to the QDR® II SRAM product line, engineered specifically for deterministic, low-latency, concurrent-access memory subsystems in 10G/40G/100G data plane implementations.

FAQ

What is the function of the DOFF pin on CY7C1513KV18-250BZC?

The DOFF (Data Output OFF) pin configures read latency mode: when asserted HIGH, it enables 1.5-cycle read latency with pipelined output staging; when LOW, it reverts to 1-cycle latency compatible with QDR I timing. This setting directly affects the number of clock cycles between RPS assertion and first valid Q[17:0] data, impacting controller pipeline design.

How does the CY7C1513KV18-250BZC support depth expansion?

Depth expansion is achieved using RPS (Read Port Select) and WPS (Write Port Select) pins to enable/disable individual devices in a bank. Each SRAM responds only when its RPS/WPS is asserted, allowing multiple devices to share the same A[19:0], D[17:0], and Q[17:0] buses while independently managing access to their respective memory segments.

Can CY7C1513KV18-250BZC operate with only a single clock input?

Yes - the device supports single-clock-domain operation by tying K to C and K to C. In this mode, all data transfers (input and output) are referenced to the K/K clock, eliminating need for separate C/C generation. However, echo clock (CQ/CQ) functionality and optimal skew compensation are lost, limiting maximum reliable data rate to ~400 MHz.

What is the purpose of BWS[1:0] in CY7C1513KV18-250BZC?

BWS[1:0] are active-low byte write select signals: BWS0 controls writing to D[8:0], and BWS1 controls D[17:9]. When either is deasserted, the corresponding 9-bit byte remains unaltered during the write cycle. This enables partial-word updates without requiring a read-modify-write sequence, preserving data integrity in multi-threaded packet header modification.