Infineon Technologies CY7C1625KV18-250BZXC

Overview

CY7C1625KV18-250BZXC from Infineon Technologies (formerly Cypress) is a 144-Mbit QDR® II SRAM with 16M × 9 organization, 250 MHz maximum operating frequency, 1.8 V core supply, and 1.4–1.8 V I/O supply. It implements separate read/write ports with DDR interfaces, two-word burst architecture, and echo clocks (CQ/CQ) for high-speed data capture in networking packet buffers and switch fabric memory.

For engineers reviewing the CY7C1625KV18-250BZXC datasheet, CY7C1625KV18-250BZXC pinout, CY7C1625KV18-250BZXC application, or CY7C1625KV18-250BZXC equivalent, key selection criteria include 250 MHz clock support, 165-ball FBGA (15 × 17 mm) package compatibility, QDR II read latency modes (1-cycle vs. 1.5-cycle), DOFF-controlled latency selection, and HSTL-18 I/O drive compliance.

Technical Context

This device uses synchronous pipelined QDR II architecture with independent read and write ports sharing a multiplexed address bus. Address latching occurs on alternate rising edges of K/K clocks, enabling concurrent read/write transactions without bus turnaround.

It integrates a PLL for precise data placement, supports single-clock mode via K/K reuse, and delivers 720 Mbps per data line using DDR on both ports. Echo clocks CQ/CQ align with output data to simplify timing closure in systems operating at 250 MHz (500 MT/s).

Key Specifications

Pinout & Package

Package: 165-ball fine-pitch ball grid array (FBGA), 15 mm × 17 mm × 1.4 mm body, 0.8 mm ball pitch, Pb-free option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1625KV18-250BZXC, the -333BZXC variant offers +33% bandwidth headroom at identical voltage and packaging, while the AS7C3256B-25JC lacks QDR architecture entirely-making it incompatible for any application requiring true dual-port concurrency or source-synchronous timing.

Availability

CY7C1625KV18-250BZXC is available at Aetrix Electronics and suitable for networking switch fabric, telecom line card buffer, and baseband processing applications requiring stable component supply, long-term lifecycle support, and verified QDR II interoperability.

Supply support for CY7C1625KV18-250BZXC 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

Infineon Technologies acquired Cypress Semiconductor in 2020 and maintains full product continuity, documentation, and support for the QDR II SRAM portfolio originally developed by Cypress.

This device belongs to Infineon's high-performance memory product line, designed specifically for deterministic, low-latency, high-bandwidth applications in networking infrastructure and communications equipment.

FAQ

What is the function of the DOFF pin on CY7C1625KV18-250BZXC?

The DOFF (Data Output OFFset) pin selects read latency mode: when asserted high, it enables 1.5-cycle latency (standard QDR II operation); when low, it reduces latency to 1 cycle for QDR I compatibility. This setting directly affects controller timing constraints and must be configured before initialization and held stable during operation.

Can CY7C1625KV18-250BZXC operate with only one clock signal (K only)?

Yes - the device supports single-clock mode where K serves as both input and output clock. In this configuration, C and C are tied to K and K respectively, and echo clocks CQ/CQ remain functional. However, dual-clock mode (separate K/K and C/C) is required to achieve optimal skew cancellation in multi-device systems.

Is the 165-ball FBGA package of CY7C1625KV18-250BZXC RoHS compliant?

Yes - the BZXC suffix denotes a lead-free (Pb-free), RoHS-compliant 165-ball FBGA package with matte tin finish. It meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) and is qualified for reflow soldering per IPC/JEDEC J-STD-020 standards.

How does byte write select (BWS0) function in the 16M × 9 configuration?

In CY7C1625KV18-250BZXC, BWS0 is the sole byte write select and operates as a global enable for all 9 data bits (D[8:0]). When deasserted (high), no write occurs; when asserted (low), the full 9-bit word is written. Unlike wider configurations, ×9 does not support partial-byte writes - BWS0 is not subdivided.