Infineon Technologies CY7C1412BV18-200BZI

Overview

CY7C1412BV18-200BZI from Cypress Semiconductor is a 36-Mbit QDR® II SRAM with 2M × 18 organization, 250 MHz clock support (200 MHz rated), 1.8 V core supply, and 1.4–1.8 V I/O supply. It implements separate read/write ports with DDR interfaces on both, 2-word burst transfers, and DLL-enabled 1.5-cycle read latency. Used in high-bandwidth packet buffering for network switches and routers.

For engineers reviewing the CY7C1412BV18-200BZI datasheet, CY7C1412BV18-200BZI pinout, CY7C1412BV18-200BZI application, or CY7C1412BV18-200BZI equivalent, key selection criteria include dual-port concurrency, echo-clock–assisted data capture timing, HSTL-18 output drive, JTAG 1149.1 testability, and FBGA-165 package compatibility with high-speed PCB layout constraints.

Technical Context

The CY7C1412BV18-200BZI uses synchronous pipelined architecture with independent K/K input clocks for address/data capture and C/C output clocks for data launch, enabling concurrent read/write operations without bus turnaround. Its Delay Lock Loop (DLL) aligns echo clocks CQ/CQ to output clocks for precise DDR data sampling at 500 MT/s.

It supports two operating modes: DLL-on mode (1.5-cycle read latency, up to 250 MHz) and DLL-off mode (1-cycle latency, QDR I timing, max 167 MHz). Address inputs are multiplexed across both ports, with RPS/WPS controlling port activation and BWS[1:0] enabling byte-selective writes to D[17:0].

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm × 1.4 mm body, RoHS-compliant, Pb-free option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T36120L10BG and IS61WV102418B, the CY7C1412BV18-200BZI uniquely delivers 200 MHz DDR dual-port operation with DLL-aligned echo clocks-enabling robust 500 MT/s data transfer in thermally and electrically demanding telecom and networking hardware.

Availability

CY7C1412BV18-200BZI is available at Aetrix Electronics and suitable for network switch buffering, telecom line card design, and FPGA-based high-frequency trading systems requiring stable component supply, long-term lifecycle support, and guaranteed FBGA-165 sourcing.

Supply support for CY7C1412BV18-200BZI 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 communications, industrial, and automotive markets.

The QDR II SRAM product line targets high-speed packet-processing infrastructure, delivering deterministic latency, concurrent access, and DDR signaling to replace legacy SRAM and DRAM in bandwidth-critical control-plane and data-plane applications.

FAQ

What is the function of the DOFF pin on CY7C1412BV18-200BZI?

The DOFF (DLL Turn Off) pin is an active-low control that disables the internal Delay Lock Loop. When pulled LOW, the device operates in QDR I mode with 1-cycle read latency and reduced maximum frequency (≤167 MHz). For standard QDR II operation at 200 MHz, DOFF must be tied HIGH via ≤10 kΩ pull-up to VDDQ.

How does the ZQ pin affect output drive strength?

The ZQ pin connects to an external precision resistor (typically 50 Ω) to ground, enabling on-die calibration of HSTL-18 output drivers. This adjusts Q[17:0] and echo clock (CQ/CQ) output impedance to 0.2 × RQ (e.g., 10 Ω for 50 Ω reference), ensuring impedance matching to PCB traces and minimizing signal reflections at 500 MT/s.

Can CY7C1412BV18-200BZI operate with only one clock signal?

Yes - it supports single-clock mode where K serves as both input and output clock. In this configuration, C and C are unused, and data is launched on K/K edges. However, echo clocks (CQ/CQ) remain functional and aligned to K, preserving source-synchronous capture capability without requiring separate C/C routing.

What is the purpose of BWS[1:0] in write operations?

BWS[1:0] (Byte Write Select) are active-low signals that control which 9-bit byte segments of D[17:0] are written during each 18-bit transfer. BWS0 governs D[8:0], BWS1 governs D[17:9]. Deasserting either allows selective update of half-words - essential for efficient read-modify-write sequences without full-word overwrite overhead.