Cypress Semiconductor Corp CY7C1514AV18-167BZC

Overview

CY7C1514AV18-167BZC from Cypress Semiconductor is a 72-Mbit QDR® II SRAM with 2M × 36 organization, 1.8V core supply, and 1.4–1.8V I/O supply. It delivers 167 MHz maximum operating frequency, 2-word burst architecture, and dual DDR read/write ports for concurrent access. Used in high-bandwidth packet buffering for network switches and routers.

For engineers reviewing the CY7C1514AV18-167BZC datasheet, CY7C1514AV18-167BZC pinout, CY7C1514AV18-167BZC application, or CY7C1514AV18-167BZC equivalent, key selection factors include DLL-enabled 1.5-cycle read latency, HSTL-18-compatible 36-bit DDR data interface, 165-ball FBGA package compatibility, and JTAG 1149.1 test support.

Technical Context

This QDR II SRAM implements fully independent synchronous read and write ports with separate address latching on alternating K/K clock edges. Its dual-clock domain (K/K for inputs, C/C for outputs) eliminates bus turnaround and enables true concurrent read/write operations at 167 MHz.

The device supports both DLL-on mode (1.5-cycle read latency, precise echo clock alignment via CQ/CQ) and DLL-off mode (1-cycle latency, QDR I timing). Output impedance is tunable via ZQ pin to match system trace impedance, and all I/Os comply with HSTL Class I specifications.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm × 1.4 mm body height, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3616L10PFI and IS61WV102436B, CY7C1514AV18-167BZC uniquely balances 167 MHz QDR II performance with DLL flexibility, echo clock support for timing closure, and backward-compatible QDR I mode-making it optimal for upgrade paths in telecom and networking hardware.

Availability

CY7C1514AV18-167BZC is available at Aetrix Electronics and suitable for high-speed network switch buffering, telecom line card packet memory, and baseband processing applications requiring stable component supply across extended product lifecycles.

Supply support for CY7C1514AV18-167BZC 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) is a U.S.-based semiconductor company specializing in high-performance memory, microcontrollers, and programmable systems-on-chip.

CY7C1514AV18 belongs to Cypress's QDR II SRAM product line, engineered specifically for deterministic, low-latency, concurrent-access memory subsystems in networking, telecommunications, and high-end test equipment.

FAQ

What is the function of the DOFF pin on CY7C1514AV18-167BZC?

The DOFF (DLL Turn Off) pin is an active-LOW control that disables the internal Delay Lock Loop. When pulled LOW, the device operates in QDR I mode with 1-cycle read latency and relaxed timing margins. For standard QDR II operation at 167 MHz with 1.5-cycle latency, DOFF must be held HIGH via a ≤10 kΩ pull-up resistor to VDDQ.

Can CY7C1514AV18-167BZC operate with only one clock pair instead of two?

Yes - it supports single-clock mode using only K/K for both input registration and output timing. In this mode, C/C are unused, and Q[35:0] are clocked directly by K/K. However, echo clocks (CQ/CQ) and deskew benefits are lost, and timing margins tighten due to increased clock-to-output skew.

How does the ZQ pin affect signal integrity in high-speed designs?

The ZQ pin calibrates the output driver impedance of Q[35:0], CQ, and CQ to match the system data bus. Connecting ZQ to a precision resistor (typically 50 Ω) to ground sets output impedance to 10 Ω (0.2 × RQ), minimizing reflections and ensuring clean eye diagrams at 334 MT/s. Leaving ZQ unconnected or tied to GND violates specification and risks signal integrity failure.

Is CY7C1514AV18-167BZC pin-compatible with other QDR II devices in the same package?

No - while it shares the 165-ball FBGA footprint with CY7C1512AV18-167BZC, pin assignments differ significantly (e.g., BWS[3:0] vs. BWS[1:0], D/Q width, address bit count). Direct replacement requires PCB redesign. The CY7C1514AV18-167BZC is not pin-compatible with IDT or Micron QDR II offerings due to differing control pin allocations and echo clock routing.