Infineon Technologies CY7C1414KV18-250BZI

Overview

CY7C1414KV18 from Cypress Semiconductor is a 1M × 36, 36-Mbit QDR® II SRAM with two-word burst architecture, 250 MHz maximum operating frequency (400 Mbps per pin), 1.8 V core supply (±0.1 V), and 1.4–1.8 V I/O supply (VDDQ). It features separate read/write ports, DDR interfaces on both ports, and echo clocks (CQ/CQ) for high-speed data capture in networking and packet buffering applications.

For engineers reviewing the CY7C1414KV18 datasheet, CY7C1414KV18 pinout, CY7C1414KV18 application, or CY7C1414KV18 equivalent, this device is selected for high-bandwidth, low-latency memory subsystems requiring concurrent read/write operations without bus turnaround, precise timing control via dual input clocks (K/K and C/C), and JTAG 1149.1 testability in telecom infrastructure and FPGA co-processor designs.

Technical Context

The CY7C1414KV18 implements a synchronous pipelined QDR II architecture with independent read and write ports sharing a multiplexed 19-bit address bus (A[18:0]). Read and write addresses are latched on alternate rising edges of K and K clocks, enabling true concurrency without arbitration overhead.

It uses a phase-locked loop (PLL) to align echo clocks (CQ/CQ) with output clocks (C/C), ensuring deterministic data valid windows at 500 Mbps per data pin. DOFF pin selects between 1-cycle (LOW) and 1.5-cycle (HIGH) read latency modes, directly impacting system timing closure in high-speed SerDes interface buffers.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body, RoHS-compliant, 0.8 mm ball pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T36120 and IS61WV102436B, CY7C1414KV18 delivers 25% higher bandwidth at half the core voltage, with echo clocks reducing FPGA timing closure effort by eliminating manual deskew calibration - making it optimal for new 10G+ telecom designs.

Availability

CY7C1414KV18 is available at Aetrix Electronics and suitable for packet buffering in switch ASICs, FPGA co-processor memory subsystems, and telecom line card applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for CY7C1414KV18 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 Cypress's QDR II SRAM product line, engineered specifically for ultra-low-latency, high-bandwidth memory subsystems in networking equipment where deterministic timing and concurrent access are mandatory.

FAQ

What is the function of the DOFF pin on CY7C1414KV18?

The DOFF (Data Output OFFset) pin configures read latency mode: when asserted HIGH, it enables 1.5-cycle read latency (standard QDR II operation); when LOW, it reduces latency to 1 cycle (QDR I compatibility mode). This selection directly affects the number of pipeline stages required in the memory controller and must be set before initialization. The pin is sampled synchronously on the rising edge of K during power-up or reset.

Can CY7C1414KV18 operate with only a single clock source?

Yes - CY7C1414KV18 supports single-clock-domain operation by tying K to C and K to C, allowing all timing to reference one differential clock pair. In this mode, echo clocks (CQ/CQ) derive from K/K instead of C/C, and output data is driven on K/K edges. However, dual-clock operation is recommended for optimal skew management in multi-device systems.

How does the BWS[3:0] signal enable byte-level writes?

BWS[3:0] are active-LOW byte write selects controlling four independent 9-bit lanes: BWS0 → D[8:0], BWS1 → D[17:9], BWS2 → D[26:18], BWS3 → D[35:27]. When a BWS bit is deasserted (HIGH), its corresponding 9-bit byte is ignored during write - preserving existing data. This enables atomic updates of protocol-specific fields (e.g., TCP checksum) without full-word read-modify-write cycles.

Is JTAG boundary scan supported on CY7C1414KV18, and how is it enabled?

Yes - CY7C1414KV18 fully complies with IEEE 1149.1 (JTAG) and includes dedicated TDI, TDO, TCK, and TMS pins. JTAG is always enabled at power-on; no configuration is needed. The boundary scan chain covers all 165 balls and supports instruction register loading, data register access, and IDCODE reading - verified in the official datasheet revision *O, pages 13–16.