Infineon Technologies CY7C1515V18-167BZXI

Overview

CY7C1515V18 from Cypress Semiconductor is a 72-Mbit QDR-II SRAM with 2M × 36 organization, 167 MHz maximum operating frequency, 1.8 V core supply (±0.1 V), and 1.4–1.8 V I/O supply (VDDQ). It implements separate read/write ports with DDR interfaces on both, 4-word burst architecture, and echo clocks (CQ/CQ) for high-speed data capture in networking and packet buffering systems.

For engineers reviewing the CY7C1515V18 datasheet, CY7C1515V18 pinout, CY7C1515V18 application, or CY7C1515V18 equivalent, key selection criteria include its x36 bus width, 165-ball FBGA package, synchronous self-timed writes, HSTL-compatible I/O, and JTAG 1149.1 test access support.

Technical Context

The CY7C1515V18 uses QDR-II architecture with fully independent read and write ports sharing a multiplexed 19-bit address bus (A[18:0]). Each port operates synchronously on rising edges of dedicated K/K input clocks, enabling concurrent transactions without bus turnaround.

Read data is clocked out via C/C output clocks with associated echo clocks CQ/CQ to compensate for flight-time skew; write data is latched on K/K edges. Internal DLL ensures precise data placement, and byte write selects (BWS[3:0]) enable granular 8-bit write control across the 36-bit data bus.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T36150L10PF and IS61WV102436B, the CY7C1515V18 delivers optimal balance of proven 167 MHz QDR-II performance, HSTL compatibility, and mature ecosystem support for telecom infrastructure designs.

Availability

CY7C1515V18 is available at Aetrix Electronics and suitable for packet buffering in network switches, line card memory in telecom routers, baseband processing in LTE BTS, and real-time video frame buffering requiring stable component supply and long-term industrial availability.

Supply support for CY7C1515V18 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 solutions for industrial, automotive, and communications markets.

The QDR-II SRAM product line was designed specifically for high-bandwidth, low-latency buffering in networking and telecommunications equipment where deterministic dual-port access and DDR timing predictability are critical.

FAQ

What is the minimum VDDQ voltage supported for CY7C1515V18 operation?

The device specifies VDDQ = 1.4 V to 1.8 V. Operation below 1.4 V violates HSTL Class I input thresholds and output drive specifications; marginally functional behavior is not guaranteed. System designs must maintain VDDQ ≥ 1.4 V with ≤ ±3% ripple under all load conditions.

Can CY7C1515V18 operate without the DLL enabled?

Yes - asserting DOFF LOW disables the DLL, but timing parameters change significantly: tAC increases by up to 1.8 ns, and tHZ and tLZ widen. This mode is only recommended for validation or low-speed debug; production use requires DLL enabled for 167 MHz compliance.

How many address pins does CY7C1515V18 require, and what is their function?

CY7C1515V18 uses 19 address pins (A[18:0]) shared between read and write ports. These are latched on rising edges of K/K to select one of 2M memory locations; no separate read/write address buses are needed due to QDR-II multiplexing architecture.

Is CY7C1515V18 pin-compatible with other devices in the CY7C15xxV18 family?

No - while all share the same 165-ball FBGA package, pin assignments differ across x8/x9/x18/x36 variants. For example, BWS[3:0] occupy unique ball positions in CY7C1515V18 versus BWS[1:0] in CY7C1513V18; direct substitution requires PCB redesign.