Cypress Semiconductor Corp CY7C1513AV18-167BZC

Overview

CY7C1513AV18-167BZC from Cypress Semiconductor is a 4M × 18-bit (72-Mbit), 1.8V QDR-II SRAM with separate read/write ports, 167 MHz maximum operating frequency, 1.5-cycle read latency (DLL enabled), and 165-ball FBGA (15 × 17 × 1.4 mm) packaging. It delivers concurrent high-bandwidth data access for network packet buffering in telecom line cards.

For engineers reviewing the CY7C1513AV18-167BZC datasheet, CY7C1513AV18-167BZC pinout, CY7C1513AV18-167BZC application, or CY7C1513AV18-167BZC equivalent, key selection criteria include DDR read/write timing at 167 MHz, 18-bit data width support, DLL-enabled latency mode, and HSTL-compatible I/O voltage (VDDQ = 1.4–1.8 V).

Technical Context

The device implements QDR-II architecture with fully independent synchronous read and write ports sharing a multiplexed address bus. Address latching occurs on alternating rising edges of K/K clocks, enabling 4-word burst transfers per access without bus turnaround.

It uses dual clock domains: K/K for input synchronization and C/C for output timing, with echo clocks CQ/CQ referenced to C/C to compensate for flight-time skew. The Delay Lock Loop (DLL) enables precise 1.5-cycle read latency; disabling DLL via DOFF reduces latency to 1 cycle but limits max frequency to 167 MHz in QDR-I mode.

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, Pb-free and non-Pb-free options available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1513AV18-200BZC, this part trades peak bandwidth for relaxed timing margins; compared with AS7C35128PFS-167BIN, it offers Cypress's legacy design support and known qualification history in telecom infrastructure.

Availability

CY7C1513AV18-167BZC is available at Aetrix Electronics and suitable for network packet buffering, high-speed test equipment memory, telecom line card control plane, and real-time video frame buffering requiring stable component supply and long-lifecycle support.

Supply support for CY7C1513AV18-167BZC 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 connectivity solutions for industrial and communications markets.

This device belongs to Cypress's QDR-II SRAM product line, engineered specifically for deterministic, low-latency, concurrent-access memory subsystems in networking, test, and video infrastructure equipment.

FAQ

What is the function of the DOFF pin on CY7C1513AV18-167BZC?

The DOFF pin disables the internal Delay Lock Loop when pulled low. In this state, the device operates in QDR-I mode with 1-cycle read latency and a maximum frequency of 167 MHz. This simplifies timing closure in cost-sensitive or lower-bandwidth designs while retaining pin and functional compatibility.

How does the ZQ pin affect output drive strength?

The ZQ pin connects to an external resistor to ground to calibrate the output impedance of Q[17:0] and echo clocks CQ/CQ. With RQ = 50 Ω, outputs are tuned to 10 Ω (0.2 × RQ); connecting ZQ directly to VDDQ enables minimum impedance mode (~7 Ω). Leaving ZQ floating or grounded violates specification and risks signal integrity failure.

Can CY7C1513AV18-167BZC be used with a single-ended clock source?

No - the device requires differential K/K and C/C clock pairs for proper operation. Single-ended driving violates AC timing specifications and causes metastability in input registers. External clock buffers (e.g., LVDS or HSTL differential drivers) must be used to generate complementary clock signals from a master oscillator.

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

BWS[1:0] are active-low byte write select signals that control which 9-bit half-word (D[8:0] or D[17:9]) is written during a burst. When BWS0 = LOW and BWS1 = HIGH, only the lower 9 bits are updated; both HIGH disables all writes. This enables partial-word updates without read-modify-write cycles.