Cypress Semiconductor Corp CY7C1625KV18-333BZXC

Overview

CY7C1625KV18-333BZXC from Infineon Technologies (formerly Cypress) is a 16M × 9, 144-Mbit QDR® II SRAM with two-word burst architecture, 333 MHz clock frequency, 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 (720 Mbps effective data rate), echo clocks (CQ/CQ), and PLL-based timing control. Used in high-bandwidth packet buffering for network switches and routers.

For engineers reviewing the CY7C1625KV18-333BZXC datasheet, CY7C1625KV18-333BZXC pinout, CY7C1625KV18-333BZXC application, or CY7C1625KV18-333BZXC equivalent, key selection criteria include 333 MHz operation, 165-ball FBGA package, 1.8 V core/1.4–1.8 V I/O compatibility, QDR II read latency modes (1-cycle or 1.5-cycle), and JTAG 1149.1 test access support.

Technical Context

The device implements true dual-port synchronous SRAM architecture with physically independent read and write data paths-no bus turnaround required. Its QDR II interface uses separate K/K clocks for address/data input timing and C/C clocks for output timing, enabling precise deskewing via echo clocks (CQ/CQ) and minimizing flight-time mismatch across high-speed PCB traces.

Internally, it employs pipelined, self-timed writes and synchronous address latching on alternating K-clock edges. The DOFF pin selects between 1-cycle (DOFF = low) and 1.5-cycle (DOFF = high) read latency, while the PLL ensures accurate data placement relative to output clocks-critical for deterministic timing in multi-chip memory subsystems.

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 compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1625KV18-333BZXC, the -363 variant delivers +8% bandwidth at same voltage and footprint, while the AS7C alternative trades QDR II timing precision for SSTL-18 compatibility-making it less suitable for systems requiring deterministic 1.5-cycle latency or source-synchronous echo clock capture.

Availability

CY7C1625KV18-333BZXC is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, and baseband processing cache applications requiring stable component supply, long-term lifecycle support, and Pb-free compliance.

Supply support for CY7C1625KV18-333BZXC 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 its high-performance memory portfolio, including QDR SRAMs, for networking, communications, and test equipment markets.

This device belongs to Infineon's QDR II SRAM product line, engineered specifically for deterministic, high-bandwidth memory interfacing in systems demanding concurrent read/write access without bus contention or turnaround penalties.

FAQ

What is the function of the DOFF pin on CY7C1625KV18-333BZXC?

The DOFF (Data Output Frequency Flag) pin configures read latency mode: when asserted high, it enables 1.5-cycle latency (standard QDR II operation); when low, it reverts to 1-cycle latency (QDR I compatibility mode). This setting directly affects timing budget allocation for read data capture at the controller and must be held stable during operation.

Can CY7C1625KV18-333BZXC operate with only a single clock input?

Yes-it supports single-clock mode where K and C are tied together and K and C are tied together. In this configuration, all timing references derive from one differential clock pair, simplifying clock distribution at the cost of reduced deskew capability compared to dual-clock mode with echo clocks.

What is the purpose of the BWS0 pin in CY7C1625KV18-333BZXC?

BWS0 (Byte Write Select 0) is an active-low signal controlling write enable for the entire 9-bit D[8:0] bus. When asserted, it permits writing to all nine bits during a burst; when deasserted, the corresponding byte remains unaltered-enabling partial writes without read-modify-write cycles.

Is JTAG boundary scan supported on CY7C1625KV18-333BZXC?

Yes-the device implements IEEE 1149.1 JTAG test access port with TDI, TDO, TCK, and TMS pins. It supports boundary scan testing of all I/O pins and internal logic, enabling verification of solder joint integrity and interconnect routing on populated PCBs without physical probe access.