Cypress Semiconductor Corp CY7C1514V18-167BZXC

Overview

CY7C1514V18 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, 2-word burst architecture, and echo clocks (CQ/CQ) for high-speed data capture in networking packet buffers and baseband processing.

For engineers reviewing the CY7C1514V18 datasheet, CY7C1514V18 pinout, CY7C1514V18 application, or CY7C1514V18 equivalent, this device supports concurrent read/write operations without bus turnaround, delivers 12 Gbps peak bandwidth at 167 MHz, and requires precise timing alignment of K/K and C/C clock pairs for reliable DDR data transfer in synchronous memory subsystems.

Technical Context

The CY7C1514V18 uses QDR-II architecture with fully independent read and write ports sharing a multiplexed 20-bit address bus (A[19:0]), enabling simultaneous access to the same or different memory locations. Each port operates synchronously with dedicated input registers (K/K for writes, K/K for reads) and output registers (C/C for reads).

It features a Delay Lock Loop (DLL) for accurate data placement, HSTL-compatible variable-drive output buffers, JTAG 1149.1 test access, and four byte write selects (BWS[3:0]) enabling granular 8-bit write control across its 36-bit data width - critical for partial-word updates in telecom buffer applications.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm × 1.4 mm body, 0.8 mm ball pitch, RoHS-compliant Pb-free option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AS7C3256A-167BIN and IS61WV204836BLL-167TQLI, the CY7C1514V18 uniquely delivers true concurrent access, echo-clock–assisted capture, and DLL-based timing accuracy - making it the only viable choice for 10G+ packet buffer and LTE baseband applications requiring sub-nanosecond timing control.

Availability

CY7C1514V18 is available at Aetrix Electronics and suitable for networking packet buffers, telecom line card memory, baseband signal processing, and high-speed test equipment requiring stable component supply and long-term lifecycle support.

Supply support for CY7C1514V18 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, with headquarters in San Jose, CA.

The QDR-II SRAM product line targets high-throughput, low-latency memory subsystems in networking infrastructure and wireless base stations - specifically engineered to replace asynchronous SRAMs and reduce system-level timing complexity.

FAQ

What is the function of the ZQ pin on CY7C1514V18?

The ZQ pin calibrates the output driver impedance of Q[35:0], CQ, and CQ to match the system data bus. It must be connected to a precision 240 Ω resistor to ground (setting 48 Ω nominal output impedance) or tied directly to VDDQ for minimum impedance mode. Leaving ZQ floating or connecting it to VSS violates the absolute maximum ratings and may cause output instability.

Can CY7C1514V18 operate in single-clock mode?

Yes - when C and C are tied to K and K respectively, the device enters single-clock mode. In this configuration, read data is clocked out on K/K instead of C/C, and CQ/CQ are generated relative to K/K. All timing parameters shift accordingly, and the DLL remains active unless disabled via DOFF. This mode simplifies clock routing but sacrifices deskew capability.

How does the BWS[3:0] functionality differ between CY7C1514V18 and CY7C1512V18?

In CY7C1514V18, BWS[3:0] independently controls four 8-bit lanes across the full 36-bit width: BWS0 → D[8:0], BWS1 → D[17:9], BWS2 → D[26:18], BWS3 → D[35:27]. CY7C1512V18 uses only BWS[1:0] for its 18-bit interface (BWS0 → D[8:0], BWS1 → D[17:9]). The extra BWS lines in CY7C1514V18 enable finer-grained partial writes required in 100G Ethernet frame header manipulation.

Is the DOFF pin required to be actively driven in normal operation?

No - DOFF should be left unconnected or pulled HIGH (via 10 kΩ to VDDQ) during normal operation to keep the internal DLL enabled. Only assert DOFF LOW when system-level jitter analysis confirms that DLL-induced phase noise degrades timing margins below acceptable limits - typically in ultra-low-jitter test setups where external clock conditioning is available.