Infineon Technologies CY7C1318BV18-167BZC

Overview

CY7C1318BV18-167BZC from Cypress Semiconductor is a 18-Mbit (1M × 18) DDR-II synchronous pipelined SRAM with 2-word burst architecture, 167 MHz maximum operating frequency, 1.8V core supply, and HSTL I/O interface - used in high-bandwidth networking packet buffers and FPGA co-processor memory subsystems.

For engineers reviewing the CY7C1318BV18-167BZC datasheet, CY7C1318BV18-167BZC pinout, CY7C1318BV18-167BZC application, or CY7C1318BV18-167BZC equivalent, key selection criteria include DDR timing alignment via dual echo clocks (CQ/CQ), programmable output drive strength, DLL-assisted data placement accuracy, and JTAG 1149.1 test access support.

Technical Context

This SRAM implements a synchronous pipelined architecture with internal self-timed writes and dual-clock domain operation: K/K for address/control/data input registration, and C/C for output data timing. The burst counter uses A0 as its LSB input to sequence two 18-bit words per access.

It integrates a Delay Lock Loop (DLL) to align echo clocks (CQ/CQ) with output data edges, enabling reliable capture at 334 Mbps per data line (600 MT/s effective DDR rate). HSTL-compatible I/O supports 1.4V–1.8V output swing with ZQ impedance calibration.

Key Specifications

Pinout & Package

165-ball Fine-Pitch Ball Grid Array (FBGA) package, 13 mm × 15 mm footprint, 1.4 mm height, RoHS-compliant Pb-free option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS45S16160J-6BLI and MT46H128M16LF-6 IT:F, CY7C1318BV18-167BZC uniquely delivers deterministic 167 MHz DDR-II timing without refresh, DLL-assisted data alignment, and HSTL compatibility - making it optimal for latency-critical embedded memory subsystems.

Availability

CY7C1318BV18-167BZC is available at Aetrix Electronics and suitable for networking packet buffers, FPGA co-processor memory, and telecom baseband processing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for CY7C1318BV18-167BZC 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 embedded systems, with expertise in SRAM, NOR flash, and PSoC architectures.

CY7C1318BV18 belongs to the DDR-II SRAM product line engineered specifically for deterministic-latency, high-bandwidth memory interfacing in FPGA- and ASIC-based communications infrastructure.

FAQ

What is the function of the LD (Load) pin in CY7C1318BV18-167BZC?

The LD pin is an active-LOW synchronous signal that initiates each burst transaction. When asserted, it defines the start of the address and R/W setup window for the upcoming 2-word burst. It must be held stable for at least one K clock cycle before valid address and control signals are presented, and remains active throughout the burst sequence.

How does the DLL improve timing performance in this SRAM?

The integrated Delay Lock Loop dynamically adjusts internal delay paths to align the rising edges of echo clocks CQ/CQ precisely with the center of the valid data window on DQ[17:0]. This eliminates static phase error caused by process/voltage/temperature variation, ensuring setup and hold margins remain positive at 167 MHz without external deskew circuitry.

Can CY7C1318BV18-167BZC operate in single-clock mode?

Yes - when C and C pins are left unconnected or tied inactive, the device defaults to single-clock mode using K and K for both input sampling and output timing. In this mode, read data is driven on the rising edges of K/K instead of C/C, and echo clocks CQ/CQ are disabled. Timing parameters shift accordingly, with reduced maximum frequency.

What is the role of the ZQ pin and how is it used?

ZQ is a dedicated reference pin for HSTL output driver calibration. It must be connected to a precision 240 Ω resistor to ground. During power-up or upon command, the SRAM measures this reference to adjust internal current sources, ensuring consistent output impedance (±15%) and voltage swing (1.4V–1.8V) across temperature and supply variations.