Infineon Technologies CY7C1414KV18-250BZXIT

Overview

CY7C1414KV18-250BZXIT from Cypress Semiconductor is a 1M × 36, 36-Mbit QDR® II SRAM with two-word burst architecture, 250 MHz maximum clock frequency (K/K), 1.8 V core supply, 1.4–1.8 V I/O supply, and 165-ball FBGA (13 × 15 × 1.4 mm) package. It delivers concurrent read/write operations via independent ports, supports echo clocks (CQ/CQ) for timing margin recovery, and enables depth expansion using RPS/WPS and four byte write selects (BWS[3:0]). Used in high-speed packet buffering for network line cards.

For engineers reviewing the CY7C1414KV18-250BZXIT datasheet, CY7C1414KV18-250BZXIT pinout, CY7C1414KV18-250BZXIT application, or CY7C1414KV18-250BZXIT equivalent, key selection criteria include 1-cycle vs. 1.5-cycle read latency (DOFF-controlled), HSTL-compatible 36-bit DDR I/O, PLL-based data placement accuracy, and FBGA thermal/mechanical compatibility with multi-chip memory subsystems.

Technical Context

This QDR II SRAM implements fully synchronous, pipelined access with separate read and write address/data paths latched on alternating rising edges of K/K clocks. Its dual-clock domain (K/K for inputs, C/C for outputs) eliminates bus turnaround and enables true concurrent transactions at up to 500 MT/s effective bandwidth.

The device uses internal self-timed write circuitry and supports programmable impedance via ZQ pin. DOFF pin selects between 1-cycle (LOW) and 1.5-cycle (HIGH) read latency modes, while echo clocks CQ/CQ align with C/C to simplify source-synchronous capture in FPGA- or ASIC-based controllers.

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, Pb-free (RoHS-compliant) construction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed burst SRAM applications.

Compared with AS7C36256P-250BIN and IS45S32800J-25BLI, CY7C1414KV18-250BZXIT offers unique DOFF-selectable latency and integrated echo clocks - both critical for maintaining timing margin in legacy or mixed-vendor systems where clock skew cannot be fully compensated in FPGA logic.

Availability

CY7C1414KV18-250BZXIT is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, baseband processing memory, and FPGA co-processor cache applications requiring stable component supply and long-term industrial availability.

Supply support for CY7C1414KV18-250BZXIT 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) is a fabless semiconductor company specializing in high-performance memory, microcontrollers, and connectivity solutions for industrial, automotive, and communications markets.

CY7C1414KV18 belongs to the QDR II SRAM product line, designed specifically for high-bandwidth, low-latency buffering in networking and telecommunications infrastructure where deterministic timing and concurrent access are mandatory.

FAQ

What is the function of the DOFF pin on CY7C1414KV18-250BZXIT?

The DOFF (Data Output OFFset) pin selects read latency mode: when asserted HIGH, it configures the device for 1.5-cycle QDR II latency with improved timing margin; when LOW, it enables 1-cycle QDR I-compatible latency. This setting is sampled synchronously on the rising edge of K and remains active until changed, allowing runtime adaptation to system timing constraints without reset.

How does the ZQ pin operate in CY7C1414KV18-250BZXIT?

The ZQ pin connects to an external 240 Ω resistor to ground and initiates on-die impedance calibration for HSTL output drivers. Calibration occurs automatically during power-up and can be triggered manually via JTAG instruction. It ensures consistent driver strength across voltage and temperature, critical for signal integrity on high-speed 36-bit DDR buses.

Can CY7C1414KV18-250BZXIT operate with only one clock (K) instead of K/K?

Yes - the device supports single-clock mode where K serves as both positive and negative clock input. In this configuration, C and C must be tied together and driven by K, and CQ/CQ derive from K. However, dual-clock operation is required to achieve full timing margin benefits and echo clock functionality; single-clock mode sacrifices deskew capability and reduces maximum reliable frequency.

What is the purpose of BWS[3:0] in CY7C1414KV18-250BZXIT?

BWS[3:0] are four independent byte write select signals that enable selective 8-bit writes within the 36-bit D[35:0] bus. Each BWS bit controls a specific 8-bit segment (BWS0: D[7:0], BWS1: D[15:8], BWS2: D[23:16], BWS3: D[31:24]); D[35:32] is always written when any BWS is active. This avoids read-modify-write cycles and reduces power in partial-update scenarios like header field edits.