Cypress Semiconductor Corp CY7C1163KV18-550BZC

Overview

CY7C1163KV18 from Cypress Semiconductor is a 1M × 18, 18-Mbit QDR® II+ SRAM with four-word burst architecture, 2.5-cycle read latency, and DDR interfaces on independent read/write ports. It operates at 550 MHz (1100 MT/s), supports 1.8 V core supply and 1.4–1.8 V I/O supply, and uses HSTL I/O with echo clocks (CQ/CQ) for precise high-speed data capture in networking packet buffers.

For engineers reviewing the CY7C1163KV18 datasheet, CY7C1163KV18 pinout, CY7C1163KV18 application, or CY7C1163KV18 equivalent, key selection criteria include its 550-MHz clock capability, separate RPS/WPS control, DOFF-configurable latency mode, and 165-ball FBGA package compatibility with depth-expansion systems requiring deterministic burst timing.

Technical Context

The CY7C1163KV18 implements a synchronous pipelined QDR II+ architecture with physically isolated read and write data paths-no bus turnaround required. Its dual DDR interfaces transfer data on every rising edge of K and K clocks, achieving 1100 MT/s bandwidth while maintaining full data coherency across concurrent transactions.

Internal operation relies on a PLL for accurate data placement and echo clocks (CQ/CQ) aligned to K/K for receiver-side timing recovery. The DOFF pin selects between 2.5-cycle QDR II+ mode (DOFF = HIGH) and 1-cycle QDR I mode (DOFF = LOW), with corresponding AC timing shifts and maximum frequency reduction to 167 MHz in the latter.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L5PF and IS61QW25618A-550BQI, CY7C1163KV18 delivers full 18-Mbit depth at 550 MHz with programmable impedance (ZQ) and dual-mode latency (via DOFF), making it uniquely suited for next-gen packet processors needing both bandwidth headroom and timing flexibility.

Availability

CY7C1163KV18 is available at Aetrix Electronics and suitable for high-speed network packet buffers, telecom line card memory, and baseband processing systems requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for CY7C1163KV18 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.

CY7C1163KV18 belongs to Cypress's QDR® II+ SRAM product line, engineered specifically for deterministic, low-latency, full-duplex memory access in packet-switching and signal-processing infrastructure.

FAQ

What is the function of the DOFF pin on CY7C1163KV18?

The DOFF pin controls the internal PLL: when asserted LOW, it disables the PLL and forces the device into QDR I mode with 1-cycle read latency and reduced maximum frequency (167 MHz). When HIGH, the PLL is active, enabling 2.5-cycle latency and full 550-MHz operation. Pull-up resistors ≤10 kΩ are recommended for normal QDR II+ use.

How does the ZQ pin affect output drive strength?

ZQ connects to an external resistor (RQ) tied to ground to calibrate output impedance of Q[17:0], CQ, and CQ pins to 0.2 × RQ. This matches the device's drive strength to the PCB trace impedance, minimizing reflections and improving signal integrity. Connecting ZQ directly to VDDQ enables minimum impedance mode; floating or grounding ZQ is prohibited.

Can CY7C1163KV18 perform simultaneous read and write operations?

Yes - the device features fully independent read and write ports with separate RPS and WPS controls. A read burst (initiated by RPS) and write burst (initiated by WPS) can occur concurrently on the same clock cycle, provided address and byte-select signals are valid, with no bus contention or turnaround delay.

What is the purpose of the QVLD signal?

QVLD is an edge-aligned valid-data indicator that asserts synchronously with CQ/CQ to mark when Q[17:0] outputs contain valid data during a read burst. It eliminates the need for fixed delay-based sampling windows and enables dynamic, clock-phase-locked data capture in high-speed receivers, especially critical in FPGA-based systems.