Cypress Semiconductor Corp CY7C1163KV18-400BZI

Overview

CY7C1163KV18 from Cypress Semiconductor is a 1.8 V, 18-Mbit QDR® II+ SRAM with 1M × 18 organization, 400 MHz maximum clock frequency, 2.5-cycle read latency, and separate synchronous read/write ports supporting concurrent DDR transfers at 800 Mbps per port. It delivers high-bandwidth buffering for network packet processing in telecom line cards.

For engineers reviewing the CY7C1163KV18 datasheet, CY7C1163KV18 pinout, CY7C1163KV18 application, or CY7C1163KV18 equivalent, key selection criteria include its 165-ball FBGA package, HSTL I/O compatibility, DOFF-configurable latency mode (QDR I vs. QDR II+), echo-clock–assisted timing closure, and JTAG 1149.1 test access support.

Technical Context

The CY7C1163KV18 implements a true dual-port synchronous architecture with physically independent read and write data paths-no bus turnaround required. Its four-word burst transfers 72 bits per read cycle (Q[17:0] × 4) and supports depth expansion via RPS/WPS controls and byte-write enables BWS0/BWS1.

Timing is governed by two complementary input clocks (K/K) and synchronized echo clocks (CQ/CQ), with all data sampled on rising edges. 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 height, RoHS-compliant, 0.8 mm ball pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T36120L10BG, CY7C1163KV18 offers configurable latency and wider VDDQ range; compared with IS61WV102418B, it delivers 2.7× higher bandwidth and true dual-port operation essential for modern packet-processing pipelines.

Availability

CY7C1163KV18 is available at Aetrix Electronics and suitable for network infrastructure, test instrumentation, wireless baseband, and FPGA-accelerated embedded systems requiring stable component supply, long-lifecycle support, and guaranteed traceability.

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

The QDR® II+ SRAM product line was designed specifically for high-throughput, low-latency buffering in packet-switched networks and real-time signal processing systems where deterministic timing and concurrent access are critical.

FAQ

What is the function of the DOFF pin on CY7C1163KV18?

The DOFF (PLL Turn Off) pin configures the device's operational mode: when pulled HIGH, the internal PLL is enabled, supporting QDR II+ timing with 2.5-cycle read latency at up to 400 MHz; when pulled LOW, the PLL is disabled and the device operates in QDR I mode with 1-cycle latency and reduced maximum frequency (≤167 MHz). This allows hardware-selectable performance vs. compatibility trade-offs.

How does the ZQ pin affect output drive strength?

The ZQ pin calibrates the output impedance of Q[17:0], CQ, and CQ signals by referencing an external 240 Ω resistor to ground, setting driver strength to 48 Ω (0.2 × RQ). If tied directly to VDDQ, the device enters minimum-impedance mode (~30 Ω). ZQ must never be left floating or connected to GND, as this disables impedance tuning and may cause signal integrity issues.

Can CY7C1163KV18 perform simultaneous read and write operations to the same address?

Yes - the CY7C1163KV18 supports full data coherency: a write to a given address completes before the next read from that same address returns updated data. Internally, the write is self-timed and pipelined, ensuring the most recently written value is always returned on subsequent reads, even during concurrent access - critical for FIFO and ping-pong buffer implementations.

What is the purpose of the BWS0 and BWS1 pins?

BWS0 and BWS1 are active-low byte write select signals controlling independent 9-bit segments of the 18-bit data bus: BWS0 enables D[8:0], BWS1 enables D[17:9]. When asserted, they allow partial writes without disturbing other bytes in the same word - essential for protocol header updates or metadata insertion without full-word overwrites, reducing bus traffic and power consumption.