Cypress Semiconductor Corp CY7C1515JV18-167BZI

Overview

CY7C1515JV18 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), 1.4–1.8 V I/O supply (VDDQ), and 165-ball FBGA (15 × 17 × 1.4 mm) package. It delivers concurrent read/write operations via independent ports, 4-word burst transfers, and DDR interfaces on both ports for high-throughput packet buffering in network line cards.

For engineers reviewing the CY7C1515JV18 datasheet, CY7C1515JV18 pinout, CY7C1515JV18 application, or CY7C1515JV18 equivalent, key selection considerations include its dual-clock DDR timing architecture, DLL-enabled 1.5-cycle read latency, HSTL-compatible I/Os, and depth-expansion support via RPS/WPS and BWS[3:0] controls.

Technical Context

The CY7C1515JV18 implements a synchronous pipelined QDR II architecture with physically separate read and write data paths, eliminating bus turnaround overhead. Its 2M × 36 memory array is internally organized as four 512K × 36 banks, accessed via a shared 19-bit address bus latched on alternating edges of K/K clocks.

All synchronous inputs (RPS, WPS, BWS[3:0], A[18:0], D[35:0]) are registered to K/K rising edges; all outputs (Q[35:0], CQ/CQ) are edge-aligned to C/C clocks. The integrated Delay Lock Loop (DLL) enables precise 1.5-cycle read latency at 167 MHz, while DOFF pin control allows fallback to QDR I mode (1-cycle latency) when disabled.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm × 1.4 mm body, 1.0 mm ball pitch, Pb-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T36150L10BG and IS61WV102436B, the CY7C1515JV18 uniquely delivers 72-Mbit density with DLL-controlled 1.5-cycle latency, integrated echo clocks, and HSTL I/O-enabling higher bandwidth and lower system-level timing complexity in next-generation packet infrastructure.

Availability

CY7C1515JV18 is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, and depth-expanded memory arrays requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for industrial deployment.

Supply support for CY7C1515JV18 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 communications and industrial markets.

The CY7C1515JV18 belongs to Cypress's QDR II SRAM product line, engineered specifically for deterministic, high-bandwidth memory access in networking and telecommunications infrastructure where concurrent read/write throughput and sub-nanosecond timing predictability are critical.

FAQ

What is the function of the DOFF pin on CY7C1515JV18?

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 reduced timing constraints, allowing use at up to 167 MHz without DLL calibration. In normal operation, DOFF must be tied HIGH via ≤10 kΩ pull-up to enable DLL functionality and achieve 1.5-cycle latency.

How does the ZQ pin affect output impedance calibration?

The ZQ pin connects to an external precision resistor (RQ) to ground, enabling on-die calibration of Q[35:0], CQ, and CQ output driver impedance to 0.2 × RQ. This matches the device's output termination to the system data bus characteristic impedance (e.g., 50 Ω), minimizing reflections and improving signal integrity. Connecting ZQ directly to VDDQ enables minimum-impedance mode; it must never be left floating or tied to GND.

Can CY7C1515JV18 operate with only a single clock domain?

Yes. The device supports single-clock-mode operation where K/K serve as both input and output clocks. In this mode, C/C are unused, and Q[35:0] outputs are timed to K/K edges instead of C/C. However, echo clocks (CQ/CQ) remain functional and synchronized to K/K, preserving their utility for data capture alignment even without dedicated output clocks.

What is the purpose of BWS[3:0] in CY7C1515JV18?

BWS[3:0] (Byte Write Select) are active-low signals that gate individual 9-bit byte lanes during write operations. BWS0–BWS3 control D[8:0], D[17:9], D[26:18], and D[35:27], respectively. When a BWS bit is deasserted, the corresponding byte is masked and remains unaltered in memory-enabling partial-word updates without read-modify-write cycles, critical for descriptor field manipulation in packet processing.