Infineon Technologies CY7C1314KV18-250BZC

Overview

CY7C1314KV18 from Cypress Semiconductor is a 512K × 36-bit, 18-Mbit QDR® II SRAM with separate read/write ports, 250 MHz operation (4 ns cycle time), 1.8 V core supply, and 1.4–1.8 V I/O supply. It delivers 3.6 Gbps bandwidth via DDR interfaces on both ports, supports two-word burst transfers, and uses echo clocks (CQ/CQ) for high-speed data capture in networking and packet buffering applications.

For engineers reviewing the CY7C1314KV18 datasheet, CY7C1314KV18 pinout, CY7C1314KV18 application, or CY7C1314KV18 equivalent, key selection criteria include its 250 MHz maximum frequency, 165-ball FBGA package, DOFF-configurable 1- or 1.5-cycle read latency, and support for depth expansion via RPS/WPS and BWS[3:0] signals.

Technical Context

The CY7C1314KV18 implements QDR II architecture with fully independent read and write ports sharing a multiplexed 18-bit address bus (A[17:0]). Read and write operations are initiated on rising edges of complementary K/K clocks, while output data is clocked by C/C with synchronized echo clocks CQ/CQ to compensate for flight-time skew.

It features synchronous self-timed writes, programmable output impedance via ZQ pin, JTAG 1149.1 boundary scan, and HSTL-compatible variable-drive outputs. The device operates in dual-clock mode by default but supports single-clock mode when C/C are tied to K/K, reducing timing complexity at the cost of reduced skew margin.

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, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L10PA and IS61WV102432BLL-15BLI, CY7C1314KV18 uniquely delivers 250 MHz DDR bandwidth with echo-clock timing support-making it the only option among the three capable of sustaining 3.6 Gbps in a single device without external deserialization or clock management.

Availability

CY7C1314KV18 is available at Aetrix Electronics and suitable for packet buffering, network switch fabric, and telecom line card applications requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for CY7C1314KV18 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 U.S.-based semiconductor company specializing in high-performance memory, microcontrollers, and connectivity solutions for industrial, automotive, and communications markets.

The CY7C1314KV18 belongs to Cypress's QDR II SRAM product line, engineered specifically for high-speed, low-latency data buffering in packet-switched infrastructure where deterministic timing and concurrent access are critical.

FAQ

What is the function of the DOFF pin on CY7C1314KV18?

The DOFF (Data-Off) pin selects read latency mode: when asserted HIGH, the device operates in QDR II mode with 1.5-cycle read latency; when LOW or tied to VSS, it reverts to QDR I mode with 1-cycle latency. This allows backward compatibility with legacy QDR I controllers while enabling higher bandwidth in new designs.

Can CY7C1314KV18 operate with a single clock instead of differential K/K and C/C pairs?

Yes-CY7C1314KV18 supports single-clock mode by connecting K to C and K to C. In this configuration, all timing references derive from K/K, eliminating the need for dedicated output clocks but removing echo-clock deskew benefits and reducing maximum reliable data rate due to increased clock-to-data skew.

How does the ZQ pin affect signal integrity in high-speed layouts?

The ZQ pin calibrates internal output driver impedance to match the system's data bus characteristic impedance (typically 50 Ω). When connected to a precision 240 Ω resistor to ground, it configures outputs for 0.2 × 240 Ω = 48 Ω drive strength-minimizing reflections and improving signal eye opening at 666 MT/s.

Is CY7C1314KV18 pin-compatible with other devices in the CY7C13xxKV18 family?

No-CY7C1314KV18 (512K × 36) uses a distinct 165-ball FBGA pinout optimized for its 36-bit interface and BWS[3:0] signals. It is not pin-compatible with CY7C1312KV18 (1M × 18), which has different address width (A[18:0] vs. A[17:0]), fewer byte-write selects (BWS[1:0]), and alternate ball assignments for D/Q signals.