Infineon Technologies CY7C1512AV18-167BZC

Overview

CY7C1512AV18-167BZC from Cypress Semiconductor is a 4M × 18 (72-Mbit), 1.8V QDR® II SRAM with dual independent read/write ports, 167 MHz maximum operating frequency, 1.5-cycle read latency (DLL enabled), and HSTL I/O interface. It delivers concurrent burst transfers of two 18-bit words per access and supports depth expansion via RPS/WPS control - deployed in high-speed packet buffering for network switches and routers.

For engineers reviewing the CY7C1512AV18-167BZC datasheet, CY7C1512AV18-167BZC pinout, CY7C1512AV18-167BZC application, or CY7C1512AV18-167BZC equivalent, key selection criteria include DDR timing compliance, echo clock (CQ/CQ) support for skew-critical capture, DLL-enabled latency mode, and 165-ball FBGA (15 × 17 × 1.4 mm) mechanical compatibility.

Technical Context

This QDR II SRAM implements fully synchronous, pipelined architecture with physically separate read and write data paths - eliminating bus turnaround overhead. It uses rising edges only of K/K clocks for input latching and C/C clocks for output registration, with echo clocks CQ/CQ synchronized to C/C for precise data capture at the controller.

The device supports both DLL-on (1.5-cycle read latency, up to 250 MHz) and DLL-off (1-cycle latency, up to 167 MHz) modes via DOFF pin control. Internal organization as two 2M × 18 arrays enables efficient address multiplexing and full data coherency across concurrent read/write operations.

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 QDR II SRAM applications.

Compared with IDT72T3615L10BG and IS61WV102418B, CY7C1512AV18-167BZC uniquely delivers DLL-synchronized 1.5-cycle latency, echo-clock-assisted capture, and true dual-port concurrency - making it irreplaceable in QDR II–compliant switch fabric and telecom line card designs.

Availability

CY7C1512AV18-167BZC is available at Aetrix Electronics and suitable for network packet buffering, high-speed switch fabric memory, and telecom line card buffering requiring stable component supply across extended product lifecycles.

Supply support for CY7C1512AV18-167BZC 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.

CY7C1512AV18 belongs to Cypress's QDR II SRAM product line, engineered specifically for deterministic-latency, concurrent-access memory subsystems in packet-switched infrastructure.

FAQ

What is the function of the DOFF pin on CY7C1512AV18-167BZC?

The DOFF pin disables the internal Delay Lock Loop when pulled LOW, forcing the device into QDR I mode with 1-cycle read latency and maximum 167 MHz operation. For QDR II mode (1.5-cycle latency, up to 250 MHz), DOFF must be pulled HIGH via ≤10 kΩ resistor to VDDQ. This pin directly controls DLL activation and cannot be left floating.

How does the ZQ pin affect output drive strength?

ZQ connects to an external resistor (RQ) tied to ground to calibrate output impedance of Q[17:0], CQ, and CQ pins to 0.2 × RQ. If RQ = 50 Ω, outputs are tuned to 10 Ω. Alternatively, tying ZQ to VDDQ enables minimum-impedance mode. Connecting ZQ to GND or leaving it unconnected violates absolute maximum ratings and may damage the device.

Can CY7C1512AV18-167BZC operate with only one clock pair?

Yes - it supports Single Clock Mode using only K/K to control both input and output registers. In this mode, C/C are ignored, and Q[17:0] timing is referenced to K/K. However, echo clocks (CQ/CQ) remain active and synchronized to K/K, preserving their utility for capture timing even without dedicated output clocks.

What is the purpose of BWS[1:0] in byte write operations?

BWS0 and BWS1 are active-LOW byte write selects that gate corresponding 9-bit segments of D[17:0]: BWS0 enables D[8:0], BWS1 enables D[17:9]. When either is deasserted during a write, that byte remains unchanged in memory - enabling efficient partial-word updates without read-modify-write cycles, critical for header field manipulation in packet processing.