Infineon Technologies CY7C1263KV18-550BZXC

Overview

CY7C1263KV18 from Cypress Semiconductor is a 36-Mbit QDR® II+ SRAM with 2M × 18 organization, 550 MHz clock frequency, 2.5-cycle read latency, and separate read/write DDR ports operating at 1100 Mbps per port. It uses HSTL I/O, 1.8 V core supply (VDD = 1.8 V ± 0.1 V), and 1.4–1.8 V I/O supply (VDDQ), housed in a 165-ball FBGA (13 × 15 × 1.4 mm). It enables high-bandwidth packet buffering in network line cards.

For engineers reviewing the CY7C1263KV18 datasheet, CY7C1263KV18 pinout, CY7C1263KV18 application, or CY7C1263KV18 equivalent, key selection criteria include concurrent read/write bandwidth, echo-clock–based data capture timing, DOFF-configurable latency mode, and depth expansion via RPS/WPS control.

Technical Context

The CY7C1263KV18 implements a synchronous pipelined architecture with independent read and write ports sharing a multiplexed 19-bit address bus. All inputs are registered on rising edges of K/K clocks; outputs are edge-aligned to CQ/CQ echo clocks and driven by output registers synchronized to K/K.

It supports four-word burst transfers per access (72-bit total per read/write cycle), full data coherency, and on-chip self-timed writes. The integrated PLL enables precise 2.5-cycle read latency when DOFF = HIGH; disabling the PLL (DOFF = LOW) reverts operation to QDR I mode with 1-cycle latency up to 167 MHz.

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 high-bandwidth dual-port SRAM applications.

Compared with IDT72T3615L10BG and IS61WV102418BLL-10BLI, the CY7C1263KV18 uniquely delivers 550 MHz operation with echo-clock–assisted timing closure, on-die impedance tuning, and hardware-selectable latency - making it optimal for new high-speed networking and test equipment designs.

Availability

CY7C1263KV18 is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, high-speed test equipment memory, and real-time signal processing buffer applications requiring stable component supply across extended production lifecycles.

Supply support for CY7C1263KV18 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.

The CY7C1263KV18 belongs to Cypress's QDR® II+ SRAM product line, engineered specifically for deterministic, high-bandwidth memory access in packet-switched infrastructure where concurrent read/write throughput and timing predictability are critical.

FAQ

What is the function of the DOFF pin on CY7C1263KV18?

The DOFF (PLL Disable) pin is an active-LOW control that disables the internal phase-locked loop. When asserted (tied LOW), the device operates in QDR I mode with 1-cycle read latency and maximum frequency limited to 167 MHz. When deasserted (pulled HIGH), it enables full QDR II+ operation at up to 550 MHz with 2.5-cycle latency. This provides hardware-selectable performance modes without firmware changes.

How does the ZQ pin affect signal integrity?

The ZQ pin connects to an external precision resistor (typically 240 Ω) to ground, allowing the device to calibrate its output driver impedance to match the system data bus characteristic impedance. This calibration sets CQ, CQ, and Q[17:0] output impedance to 0.2 × RQ, minimizing reflections and improving eye diagram margins at 1100 MT/s. Leaving ZQ unconnected or tied to GND violates specifications and risks signal integrity failure.

Can CY7C1263KV18 be used with a 1.5 V I/O supply?

Yes - the device supports VDDQ from 1.4 V to 1.8 V, explicitly including 1.5 V operation. Its HSTL Class I inputs and variable-drive HSTL outputs are designed for compatibility with both 1.5 V and 1.8 V system interfaces. DC electrical characteristics (e.g., VIH/VIL thresholds, drive strength) are guaranteed across this full range, enabling seamless integration into mixed-voltage FPGA or ASIC platforms.

What is the role of RPS and WPS in depth expansion?

RPS (Read Port Select) and WPS (Write Port Select) are active-LOW synchronous control signals that independently enable or disable each port. In depth expansion configurations, multiple CY7C1263KV18 devices share the same address and data buses; RPS/WPS are decoded externally to select which device responds to a given read or write transaction - eliminating need for external multiplexers or glue logic while preserving full concurrency per device.