Cypress Semiconductor Corp CY7C1150KV18-400BZXI

Overview

CY7C1150KV18-400BZXI from Cypress Semiconductor is a 18-Mbit synchronous pipelined DDR II+ SRAM configured as 512K × 36, operating at 400 MHz with 2.0-cycle read latency, HSTL I/O, and integrated PLL for precise data placement-used in high-bandwidth packet buffering and network switch fabric memory subsystems.

For engineers reviewing the CY7C1150KV18-400BZXI datasheet, CY7C1150KV18-400BZXI pinout, CY7C1150KV18-400BZXI application, or CY7C1150KV18-400BZXI equivalent, key selection criteria include DDR II+ burst timing compliance, echo clock (CQ/CQ) synchronization, QVLD data validity signaling, and 165-ball FBGA mechanical compatibility with high-speed PCB layout constraints.

Technical Context

This device implements a synchronous pipelined architecture with dual input clocks (K/K) driving all address, control, and data registers on rising edges; read data bursts two 36-bit words per access, aligned to both K and K edges, with output timing referenced to echo clocks CQ/CQ.

The internal PLL enables accurate data placement at 400 MHz, while DOFF pin selection determines operation mode: PLL-enabled DDR II+ (2-cycle latency, up to 400 MHz) or PLL-bypassed DDR I (1-cycle latency, ≤167 MHz); VDD = 1.8 V ± 0.1 V and VDDQ = 1.4–1.8 V support mixed-voltage system integration.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body height, RoHS-compliant Pb-free option (BZXI suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AS7C3256B-15JCIN and IS61WV102432BLL-15BLI, CY7C1150KV18-400BZXI delivers 19× higher peak bandwidth (28.8 vs. 1.5 GB/s) and eliminates board-level timing tuning via integrated echo clocks and QVLD - essential for 10G+ systems.

Availability

CY7C1150KV18-400BZXI is available at Aetrix Electronics and suitable for network switch buffer memory, telecom line card packet FIFO, and high-speed test equipment memory requiring stable component supply across extended production lifecycles.

Supply support for CY7C1150KV18-400BZXI 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.

CY7C1150KV18 belongs to the QDR II+ SRAM product line, engineered specifically for deterministic, low-latency, high-bandwidth memory interfacing in packet-switched infrastructure and real-time control systems.

FAQ

What is the function of the DOFF pin on CY7C1150KV18-400BZXI?

The DOFF pin controls PLL operation: when asserted HIGH, the PLL is active and the device operates in DDR II+ mode with 2.0-cycle read latency at up to 400 MHz; when pulled LOW, the PLL is disabled and the device reverts to DDR I timing with 1-cycle latency and a maximum frequency of 167 MHz. This provides a hardware-selectable timing mode for design margining or fallback operation.

How does the ZQ pin affect output impedance calibration?

The ZQ pin connects to an external 240 Ω resistor to ground, enabling on-die calibration of CQ, CQ, and DQ[35:0] output drivers to 48 Ω (0.2 × 240 Ω). This matches standard PCB trace impedances without discrete terminators. If ZQ is tied directly to VDDQ, minimum output impedance mode is activated - useful for short-trace or point-to-point configurations.

Can CY7C1150KV18-400BZXI operate with VDDQ = 1.5 V?

Yes - the device supports VDDQ from 1.4 V to 1.8 V, explicitly including 1.5 V. At 1.5 V, HSTL Class I output drive strength is maintained, and AC timing parameters remain within specification per the datasheet's "1.5 V I/O Supply" column. No configuration change is required beyond setting VDDQ supply accordingly.

What is the purpose of the QVLD signal in system-level timing?

QVLD is a synchronous output that asserts edge-aligned with CQ and CQ to indicate when DQ[35:0] data is valid. It replaces fixed-delay sampling windows with a dynamic, clock-aligned validity flag - enabling robust data capture across voltage, temperature, and process variations without timing margin padding in FPGA or ASIC receivers.