Cypress Semiconductor Corp CY7C1512V18-167BZC

Overview

CY7C1512V18 from Cypress Semiconductor is a 4M × 18-bit (72-Mbit), 167 MHz QDR-II SRAM with separate read/write ports, DDR interfaces on both ports, and 1.8V core / 1.4V–1.8V I/O supply. It delivers 500 MT/s data transfer rate per port using K/K and C/C differential clock pairs, and supports synchronous self-timed writes in a 165-ball FBGA (15 × 17 × 1.4 mm). It is used in high-bandwidth packet buffering for network switches and routers.

For engineers reviewing the CY7C1512V18 datasheet, CY7C1512V18 pinout, CY7C1512V18 application, or CY7C1512V18 equivalent, key selection criteria include burst depth (2-word), HSTL-18 I/O compatibility, DLL-enabled timing accuracy, echo clock (CQ/CQ) support for source-synchronous capture, and 18-bit data width for efficient 32-bit-aligned bus interfacing.

Technical Context

The CY7C1512V18 implements QDR-II architecture with fully independent read and write pipelines, each synchronized to dedicated rising-edge-triggered clocks (K/K for inputs, C/C for outputs). Its 2M × 18 internal organization uses 21 address bits and supports depth expansion via RPS/WPS and BWS[1:0] signals.

It integrates a Delay Lock Loop (DLL) for precise output data alignment relative to C/C, echo clocks CQ/CQ referenced to C/C for PCB flight-time deskew, and variable-strength HSTL-18 output drivers calibrated via ZQ pin. All control inputs are registered, and writes are internally self-timed without external latency handshaking.

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.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1512V18-200BZC, the -167BZC offers relaxed timing margins and lower power at 167 MHz, while AS7C3256A-15JCIN lacks QDR-II's concurrency and source-synchronous timing-making it unsuitable for new high-speed packet or video buffer designs.

Availability

CY7C1512V18-167BZC is available at Aetrix Electronics and suitable for network infrastructure, automated test equipment, baseband processing, and industrial vision systems requiring stable component supply and long-term obsolescence management.

Supply support for CY7C1512V18-167BZC 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 networking, automotive, and industrial applications.

The QDR-II SRAM product line targets high-bandwidth, low-latency buffering in packet-switched systems-optimized for deterministic timing, concurrent access, and seamless integration with FPGA and ASIC memory controllers.

FAQ

What is the function of the ZQ pin on CY7C1512V18-167BZC?

The ZQ pin calibrates the output driver impedance of Q[17:0], CQ, and CQ to match the system data bus. It must be connected to a precision resistor (typically 100 Ω) tied to ground; alternatively, connecting ZQ directly to VDDQ enables minimum output impedance mode. Leaving ZQ floating or tying it to ground violates specification and causes undefined drive strength.

Can CY7C1512V18-167BZC operate in single-clock mode?

Yes-it supports single-clock mode where K and C are tied together (and K and C are tied together), eliminating the need for separate input/output clock domains. In this mode, data is latched and driven on K/K edges, and CQ/CQ are generated relative to K/K. Setup/hold timing changes versus dual-clock mode, so refer to Table 12 in the datasheet for revised values.

How does the DOFF pin affect timing behavior?

Asserting DOFF (driving it LOW) disables the internal Delay Lock Loop, causing output data to be launched with uncalibrated delay relative to C/C. This increases output skew and reduces timing margin-only recommended when external deskew circuitry compensates. DLL-disabled timing parameters differ significantly from those in the standard datasheet tables and require re-characterization.

What is the purpose of BWS[1:0] in the 4M×18 configuration?

BWS[1:0] are active-low byte write select signals that enable partial writes to either the lower 9-bit byte (D[8:0], controlled by BWS0) or upper 9-bit byte (D[17:9], controlled by BWS1) of the 18-bit data bus. When one BWS is deasserted, its corresponding byte remains unchanged-allowing efficient updates without overwriting adjacent data in the same word.